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-rw-r--r--drivers/hwmon/pmbus/pmbus_core.c3431
1 files changed, 3431 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
new file mode 100644
index 000000000..7ec049347
--- /dev/null
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -0,0 +1,3431 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Hardware monitoring driver for PMBus devices
+ *
+ * Copyright (c) 2010, 2011 Ericsson AB.
+ * Copyright (c) 2012 Guenter Roeck
+ */
+
+#include <linux/debugfs.h>
+#include <linux/kernel.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/pmbus.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/of.h>
+#include <linux/thermal.h>
+#include "pmbus.h"
+
+/*
+ * Number of additional attribute pointers to allocate
+ * with each call to krealloc
+ */
+#define PMBUS_ATTR_ALLOC_SIZE 32
+#define PMBUS_NAME_SIZE 24
+
+struct pmbus_sensor {
+ struct pmbus_sensor *next;
+ char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */
+ struct device_attribute attribute;
+ u8 page; /* page number */
+ u8 phase; /* phase number, 0xff for all phases */
+ u16 reg; /* register */
+ enum pmbus_sensor_classes class; /* sensor class */
+ bool update; /* runtime sensor update needed */
+ bool convert; /* Whether or not to apply linear/vid/direct */
+ int data; /* Sensor data.
+ Negative if there was a read error */
+};
+#define to_pmbus_sensor(_attr) \
+ container_of(_attr, struct pmbus_sensor, attribute)
+
+struct pmbus_boolean {
+ char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */
+ struct sensor_device_attribute attribute;
+ struct pmbus_sensor *s1;
+ struct pmbus_sensor *s2;
+};
+#define to_pmbus_boolean(_attr) \
+ container_of(_attr, struct pmbus_boolean, attribute)
+
+struct pmbus_label {
+ char name[PMBUS_NAME_SIZE]; /* sysfs label name */
+ struct device_attribute attribute;
+ char label[PMBUS_NAME_SIZE]; /* label */
+};
+#define to_pmbus_label(_attr) \
+ container_of(_attr, struct pmbus_label, attribute)
+
+/* Macros for converting between sensor index and register/page/status mask */
+
+#define PB_STATUS_MASK 0xffff
+#define PB_REG_SHIFT 16
+#define PB_REG_MASK 0x3ff
+#define PB_PAGE_SHIFT 26
+#define PB_PAGE_MASK 0x3f
+
+#define pb_reg_to_index(page, reg, mask) (((page) << PB_PAGE_SHIFT) | \
+ ((reg) << PB_REG_SHIFT) | (mask))
+
+#define pb_index_to_page(index) (((index) >> PB_PAGE_SHIFT) & PB_PAGE_MASK)
+#define pb_index_to_reg(index) (((index) >> PB_REG_SHIFT) & PB_REG_MASK)
+#define pb_index_to_mask(index) ((index) & PB_STATUS_MASK)
+
+struct pmbus_data {
+ struct device *dev;
+ struct device *hwmon_dev;
+
+ u32 flags; /* from platform data */
+
+ int exponent[PMBUS_PAGES];
+ /* linear mode: exponent for output voltages */
+
+ const struct pmbus_driver_info *info;
+
+ int max_attributes;
+ int num_attributes;
+ struct attribute_group group;
+ const struct attribute_group **groups;
+ struct dentry *debugfs; /* debugfs device directory */
+
+ struct pmbus_sensor *sensors;
+
+ struct mutex update_lock;
+
+ bool has_status_word; /* device uses STATUS_WORD register */
+ int (*read_status)(struct i2c_client *client, int page);
+
+ s16 currpage; /* current page, -1 for unknown/unset */
+ s16 currphase; /* current phase, 0xff for all, -1 for unknown/unset */
+
+ int vout_low[PMBUS_PAGES]; /* voltage low margin */
+ int vout_high[PMBUS_PAGES]; /* voltage high margin */
+};
+
+struct pmbus_debugfs_entry {
+ struct i2c_client *client;
+ u8 page;
+ u8 reg;
+};
+
+static const int pmbus_fan_rpm_mask[] = {
+ PB_FAN_1_RPM,
+ PB_FAN_2_RPM,
+ PB_FAN_1_RPM,
+ PB_FAN_2_RPM,
+};
+
+static const int pmbus_fan_config_registers[] = {
+ PMBUS_FAN_CONFIG_12,
+ PMBUS_FAN_CONFIG_12,
+ PMBUS_FAN_CONFIG_34,
+ PMBUS_FAN_CONFIG_34
+};
+
+static const int pmbus_fan_command_registers[] = {
+ PMBUS_FAN_COMMAND_1,
+ PMBUS_FAN_COMMAND_2,
+ PMBUS_FAN_COMMAND_3,
+ PMBUS_FAN_COMMAND_4,
+};
+
+void pmbus_clear_cache(struct i2c_client *client)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ struct pmbus_sensor *sensor;
+
+ for (sensor = data->sensors; sensor; sensor = sensor->next)
+ sensor->data = -ENODATA;
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_clear_cache, PMBUS);
+
+void pmbus_set_update(struct i2c_client *client, u8 reg, bool update)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ struct pmbus_sensor *sensor;
+
+ for (sensor = data->sensors; sensor; sensor = sensor->next)
+ if (sensor->reg == reg)
+ sensor->update = update;
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_set_update, PMBUS);
+
+int pmbus_set_page(struct i2c_client *client, int page, int phase)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ int rv;
+
+ if (page < 0)
+ return 0;
+
+ if (!(data->info->func[page] & PMBUS_PAGE_VIRTUAL) &&
+ data->info->pages > 1 && page != data->currpage) {
+ rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
+ if (rv < 0)
+ return rv;
+
+ rv = i2c_smbus_read_byte_data(client, PMBUS_PAGE);
+ if (rv < 0)
+ return rv;
+
+ if (rv != page)
+ return -EIO;
+ }
+ data->currpage = page;
+
+ if (data->info->phases[page] && data->currphase != phase &&
+ !(data->info->func[page] & PMBUS_PHASE_VIRTUAL)) {
+ rv = i2c_smbus_write_byte_data(client, PMBUS_PHASE,
+ phase);
+ if (rv)
+ return rv;
+ }
+ data->currphase = phase;
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_set_page, PMBUS);
+
+int pmbus_write_byte(struct i2c_client *client, int page, u8 value)
+{
+ int rv;
+
+ rv = pmbus_set_page(client, page, 0xff);
+ if (rv < 0)
+ return rv;
+
+ return i2c_smbus_write_byte(client, value);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_write_byte, PMBUS);
+
+/*
+ * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if
+ * a device specific mapping function exists and calls it if necessary.
+ */
+static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ const struct pmbus_driver_info *info = data->info;
+ int status;
+
+ if (info->write_byte) {
+ status = info->write_byte(client, page, value);
+ if (status != -ENODATA)
+ return status;
+ }
+ return pmbus_write_byte(client, page, value);
+}
+
+int pmbus_write_word_data(struct i2c_client *client, int page, u8 reg,
+ u16 word)
+{
+ int rv;
+
+ rv = pmbus_set_page(client, page, 0xff);
+ if (rv < 0)
+ return rv;
+
+ return i2c_smbus_write_word_data(client, reg, word);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_write_word_data, PMBUS);
+
+
+static int pmbus_write_virt_reg(struct i2c_client *client, int page, int reg,
+ u16 word)
+{
+ int bit;
+ int id;
+ int rv;
+
+ switch (reg) {
+ case PMBUS_VIRT_FAN_TARGET_1 ... PMBUS_VIRT_FAN_TARGET_4:
+ id = reg - PMBUS_VIRT_FAN_TARGET_1;
+ bit = pmbus_fan_rpm_mask[id];
+ rv = pmbus_update_fan(client, page, id, bit, bit, word);
+ break;
+ default:
+ rv = -ENXIO;
+ break;
+ }
+
+ return rv;
+}
+
+/*
+ * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if
+ * a device specific mapping function exists and calls it if necessary.
+ */
+static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg,
+ u16 word)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ const struct pmbus_driver_info *info = data->info;
+ int status;
+
+ if (info->write_word_data) {
+ status = info->write_word_data(client, page, reg, word);
+ if (status != -ENODATA)
+ return status;
+ }
+
+ if (reg >= PMBUS_VIRT_BASE)
+ return pmbus_write_virt_reg(client, page, reg, word);
+
+ return pmbus_write_word_data(client, page, reg, word);
+}
+
+/*
+ * _pmbus_write_byte_data() is similar to pmbus_write_byte_data(), but checks if
+ * a device specific mapping function exists and calls it if necessary.
+ */
+static int _pmbus_write_byte_data(struct i2c_client *client, int page, int reg, u8 value)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ const struct pmbus_driver_info *info = data->info;
+ int status;
+
+ if (info->write_byte_data) {
+ status = info->write_byte_data(client, page, reg, value);
+ if (status != -ENODATA)
+ return status;
+ }
+ return pmbus_write_byte_data(client, page, reg, value);
+}
+
+/*
+ * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if
+ * a device specific mapping function exists and calls it if necessary.
+ */
+static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ const struct pmbus_driver_info *info = data->info;
+ int status;
+
+ if (info->read_byte_data) {
+ status = info->read_byte_data(client, page, reg);
+ if (status != -ENODATA)
+ return status;
+ }
+ return pmbus_read_byte_data(client, page, reg);
+}
+
+int pmbus_update_fan(struct i2c_client *client, int page, int id,
+ u8 config, u8 mask, u16 command)
+{
+ int from;
+ int rv;
+ u8 to;
+
+ from = _pmbus_read_byte_data(client, page,
+ pmbus_fan_config_registers[id]);
+ if (from < 0)
+ return from;
+
+ to = (from & ~mask) | (config & mask);
+ if (to != from) {
+ rv = _pmbus_write_byte_data(client, page,
+ pmbus_fan_config_registers[id], to);
+ if (rv < 0)
+ return rv;
+ }
+
+ return _pmbus_write_word_data(client, page,
+ pmbus_fan_command_registers[id], command);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_update_fan, PMBUS);
+
+int pmbus_read_word_data(struct i2c_client *client, int page, int phase, u8 reg)
+{
+ int rv;
+
+ rv = pmbus_set_page(client, page, phase);
+ if (rv < 0)
+ return rv;
+
+ return i2c_smbus_read_word_data(client, reg);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_read_word_data, PMBUS);
+
+static int pmbus_read_virt_reg(struct i2c_client *client, int page, int reg)
+{
+ int rv;
+ int id;
+
+ switch (reg) {
+ case PMBUS_VIRT_FAN_TARGET_1 ... PMBUS_VIRT_FAN_TARGET_4:
+ id = reg - PMBUS_VIRT_FAN_TARGET_1;
+ rv = pmbus_get_fan_rate_device(client, page, id, rpm);
+ break;
+ default:
+ rv = -ENXIO;
+ break;
+ }
+
+ return rv;
+}
+
+/*
+ * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if
+ * a device specific mapping function exists and calls it if necessary.
+ */
+static int _pmbus_read_word_data(struct i2c_client *client, int page,
+ int phase, int reg)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ const struct pmbus_driver_info *info = data->info;
+ int status;
+
+ if (info->read_word_data) {
+ status = info->read_word_data(client, page, phase, reg);
+ if (status != -ENODATA)
+ return status;
+ }
+
+ if (reg >= PMBUS_VIRT_BASE)
+ return pmbus_read_virt_reg(client, page, reg);
+
+ return pmbus_read_word_data(client, page, phase, reg);
+}
+
+/* Same as above, but without phase parameter, for use in check functions */
+static int __pmbus_read_word_data(struct i2c_client *client, int page, int reg)
+{
+ return _pmbus_read_word_data(client, page, 0xff, reg);
+}
+
+int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg)
+{
+ int rv;
+
+ rv = pmbus_set_page(client, page, 0xff);
+ if (rv < 0)
+ return rv;
+
+ return i2c_smbus_read_byte_data(client, reg);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_read_byte_data, PMBUS);
+
+int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg, u8 value)
+{
+ int rv;
+
+ rv = pmbus_set_page(client, page, 0xff);
+ if (rv < 0)
+ return rv;
+
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_write_byte_data, PMBUS);
+
+int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg,
+ u8 mask, u8 value)
+{
+ unsigned int tmp;
+ int rv;
+
+ rv = _pmbus_read_byte_data(client, page, reg);
+ if (rv < 0)
+ return rv;
+
+ tmp = (rv & ~mask) | (value & mask);
+
+ if (tmp != rv)
+ rv = _pmbus_write_byte_data(client, page, reg, tmp);
+
+ return rv;
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_update_byte_data, PMBUS);
+
+static int pmbus_read_block_data(struct i2c_client *client, int page, u8 reg,
+ char *data_buf)
+{
+ int rv;
+
+ rv = pmbus_set_page(client, page, 0xff);
+ if (rv < 0)
+ return rv;
+
+ return i2c_smbus_read_block_data(client, reg, data_buf);
+}
+
+static struct pmbus_sensor *pmbus_find_sensor(struct pmbus_data *data, int page,
+ int reg)
+{
+ struct pmbus_sensor *sensor;
+
+ for (sensor = data->sensors; sensor; sensor = sensor->next) {
+ if (sensor->page == page && sensor->reg == reg)
+ return sensor;
+ }
+
+ return ERR_PTR(-EINVAL);
+}
+
+static int pmbus_get_fan_rate(struct i2c_client *client, int page, int id,
+ enum pmbus_fan_mode mode,
+ bool from_cache)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ bool want_rpm, have_rpm;
+ struct pmbus_sensor *s;
+ int config;
+ int reg;
+
+ want_rpm = (mode == rpm);
+
+ if (from_cache) {
+ reg = want_rpm ? PMBUS_VIRT_FAN_TARGET_1 : PMBUS_VIRT_PWM_1;
+ s = pmbus_find_sensor(data, page, reg + id);
+ if (IS_ERR(s))
+ return PTR_ERR(s);
+
+ return s->data;
+ }
+
+ config = _pmbus_read_byte_data(client, page,
+ pmbus_fan_config_registers[id]);
+ if (config < 0)
+ return config;
+
+ have_rpm = !!(config & pmbus_fan_rpm_mask[id]);
+ if (want_rpm == have_rpm)
+ return pmbus_read_word_data(client, page, 0xff,
+ pmbus_fan_command_registers[id]);
+
+ /* Can't sensibly map between RPM and PWM, just return zero */
+ return 0;
+}
+
+int pmbus_get_fan_rate_device(struct i2c_client *client, int page, int id,
+ enum pmbus_fan_mode mode)
+{
+ return pmbus_get_fan_rate(client, page, id, mode, false);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_get_fan_rate_device, PMBUS);
+
+int pmbus_get_fan_rate_cached(struct i2c_client *client, int page, int id,
+ enum pmbus_fan_mode mode)
+{
+ return pmbus_get_fan_rate(client, page, id, mode, true);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_get_fan_rate_cached, PMBUS);
+
+static void pmbus_clear_fault_page(struct i2c_client *client, int page)
+{
+ _pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
+}
+
+void pmbus_clear_faults(struct i2c_client *client)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ int i;
+
+ for (i = 0; i < data->info->pages; i++)
+ pmbus_clear_fault_page(client, i);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_clear_faults, PMBUS);
+
+static int pmbus_check_status_cml(struct i2c_client *client)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ int status, status2;
+
+ status = data->read_status(client, -1);
+ if (status < 0 || (status & PB_STATUS_CML)) {
+ status2 = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML);
+ if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND))
+ return -EIO;
+ }
+ return 0;
+}
+
+static bool pmbus_check_register(struct i2c_client *client,
+ int (*func)(struct i2c_client *client,
+ int page, int reg),
+ int page, int reg)
+{
+ int rv;
+ struct pmbus_data *data = i2c_get_clientdata(client);
+
+ rv = func(client, page, reg);
+ if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
+ rv = pmbus_check_status_cml(client);
+ if (rv < 0 && (data->flags & PMBUS_READ_STATUS_AFTER_FAILED_CHECK))
+ data->read_status(client, -1);
+ pmbus_clear_fault_page(client, -1);
+ return rv >= 0;
+}
+
+static bool pmbus_check_status_register(struct i2c_client *client, int page)
+{
+ int status;
+ struct pmbus_data *data = i2c_get_clientdata(client);
+
+ status = data->read_status(client, page);
+ if (status >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK) &&
+ (status & PB_STATUS_CML)) {
+ status = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML);
+ if (status < 0 || (status & PB_CML_FAULT_INVALID_COMMAND))
+ status = -EIO;
+ }
+
+ pmbus_clear_fault_page(client, -1);
+ return status >= 0;
+}
+
+bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg)
+{
+ return pmbus_check_register(client, _pmbus_read_byte_data, page, reg);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_check_byte_register, PMBUS);
+
+bool pmbus_check_word_register(struct i2c_client *client, int page, int reg)
+{
+ return pmbus_check_register(client, __pmbus_read_word_data, page, reg);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_check_word_register, PMBUS);
+
+static bool __maybe_unused pmbus_check_block_register(struct i2c_client *client,
+ int page, int reg)
+{
+ int rv;
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ char data_buf[I2C_SMBUS_BLOCK_MAX + 2];
+
+ rv = pmbus_read_block_data(client, page, reg, data_buf);
+ if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
+ rv = pmbus_check_status_cml(client);
+ if (rv < 0 && (data->flags & PMBUS_READ_STATUS_AFTER_FAILED_CHECK))
+ data->read_status(client, -1);
+ pmbus_clear_fault_page(client, -1);
+ return rv >= 0;
+}
+
+const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+
+ return data->info;
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_get_driver_info, PMBUS);
+
+static int pmbus_get_status(struct i2c_client *client, int page, int reg)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ int status;
+
+ switch (reg) {
+ case PMBUS_STATUS_WORD:
+ status = data->read_status(client, page);
+ break;
+ default:
+ status = _pmbus_read_byte_data(client, page, reg);
+ break;
+ }
+ if (status < 0)
+ pmbus_clear_faults(client);
+ return status;
+}
+
+static void pmbus_update_sensor_data(struct i2c_client *client, struct pmbus_sensor *sensor)
+{
+ if (sensor->data < 0 || sensor->update)
+ sensor->data = _pmbus_read_word_data(client, sensor->page,
+ sensor->phase, sensor->reg);
+}
+
+/*
+ * Convert ieee754 sensor values to milli- or micro-units
+ * depending on sensor type.
+ *
+ * ieee754 data format:
+ * bit 15: sign
+ * bit 10..14: exponent
+ * bit 0..9: mantissa
+ * exponent=0:
+ * v=(−1)^signbit * 2^(−14) * 0.significantbits
+ * exponent=1..30:
+ * v=(−1)^signbit * 2^(exponent - 15) * 1.significantbits
+ * exponent=31:
+ * v=NaN
+ *
+ * Add the number mantissa bits into the calculations for simplicity.
+ * To do that, add '10' to the exponent. By doing that, we can just add
+ * 0x400 to normal values and get the expected result.
+ */
+static long pmbus_reg2data_ieee754(struct pmbus_data *data,
+ struct pmbus_sensor *sensor)
+{
+ int exponent;
+ bool sign;
+ long val;
+
+ /* only support half precision for now */
+ sign = sensor->data & 0x8000;
+ exponent = (sensor->data >> 10) & 0x1f;
+ val = sensor->data & 0x3ff;
+
+ if (exponent == 0) { /* subnormal */
+ exponent = -(14 + 10);
+ } else if (exponent == 0x1f) { /* NaN, convert to min/max */
+ exponent = 0;
+ val = 65504;
+ } else {
+ exponent -= (15 + 10); /* normal */
+ val |= 0x400;
+ }
+
+ /* scale result to milli-units for all sensors except fans */
+ if (sensor->class != PSC_FAN)
+ val = val * 1000L;
+
+ /* scale result to micro-units for power sensors */
+ if (sensor->class == PSC_POWER)
+ val = val * 1000L;
+
+ if (exponent >= 0)
+ val <<= exponent;
+ else
+ val >>= -exponent;
+
+ if (sign)
+ val = -val;
+
+ return val;
+}
+
+/*
+ * Convert linear sensor values to milli- or micro-units
+ * depending on sensor type.
+ */
+static s64 pmbus_reg2data_linear(struct pmbus_data *data,
+ struct pmbus_sensor *sensor)
+{
+ s16 exponent;
+ s32 mantissa;
+ s64 val;
+
+ if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */
+ exponent = data->exponent[sensor->page];
+ mantissa = (u16) sensor->data;
+ } else { /* LINEAR11 */
+ exponent = ((s16)sensor->data) >> 11;
+ mantissa = ((s16)((sensor->data & 0x7ff) << 5)) >> 5;
+ }
+
+ val = mantissa;
+
+ /* scale result to milli-units for all sensors except fans */
+ if (sensor->class != PSC_FAN)
+ val = val * 1000LL;
+
+ /* scale result to micro-units for power sensors */
+ if (sensor->class == PSC_POWER)
+ val = val * 1000LL;
+
+ if (exponent >= 0)
+ val <<= exponent;
+ else
+ val >>= -exponent;
+
+ return val;
+}
+
+/*
+ * Convert direct sensor values to milli- or micro-units
+ * depending on sensor type.
+ */
+static s64 pmbus_reg2data_direct(struct pmbus_data *data,
+ struct pmbus_sensor *sensor)
+{
+ s64 b, val = (s16)sensor->data;
+ s32 m, R;
+
+ m = data->info->m[sensor->class];
+ b = data->info->b[sensor->class];
+ R = data->info->R[sensor->class];
+
+ if (m == 0)
+ return 0;
+
+ /* X = 1/m * (Y * 10^-R - b) */
+ R = -R;
+ /* scale result to milli-units for everything but fans */
+ if (!(sensor->class == PSC_FAN || sensor->class == PSC_PWM)) {
+ R += 3;
+ b *= 1000;
+ }
+
+ /* scale result to micro-units for power sensors */
+ if (sensor->class == PSC_POWER) {
+ R += 3;
+ b *= 1000;
+ }
+
+ while (R > 0) {
+ val *= 10;
+ R--;
+ }
+ while (R < 0) {
+ val = div_s64(val + 5LL, 10L); /* round closest */
+ R++;
+ }
+
+ val = div_s64(val - b, m);
+ return val;
+}
+
+/*
+ * Convert VID sensor values to milli- or micro-units
+ * depending on sensor type.
+ */
+static s64 pmbus_reg2data_vid(struct pmbus_data *data,
+ struct pmbus_sensor *sensor)
+{
+ long val = sensor->data;
+ long rv = 0;
+
+ switch (data->info->vrm_version[sensor->page]) {
+ case vr11:
+ if (val >= 0x02 && val <= 0xb2)
+ rv = DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100);
+ break;
+ case vr12:
+ if (val >= 0x01)
+ rv = 250 + (val - 1) * 5;
+ break;
+ case vr13:
+ if (val >= 0x01)
+ rv = 500 + (val - 1) * 10;
+ break;
+ case imvp9:
+ if (val >= 0x01)
+ rv = 200 + (val - 1) * 10;
+ break;
+ case amd625mv:
+ if (val >= 0x0 && val <= 0xd8)
+ rv = DIV_ROUND_CLOSEST(155000 - val * 625, 100);
+ break;
+ }
+ return rv;
+}
+
+static s64 pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)
+{
+ s64 val;
+
+ if (!sensor->convert)
+ return sensor->data;
+
+ switch (data->info->format[sensor->class]) {
+ case direct:
+ val = pmbus_reg2data_direct(data, sensor);
+ break;
+ case vid:
+ val = pmbus_reg2data_vid(data, sensor);
+ break;
+ case ieee754:
+ val = pmbus_reg2data_ieee754(data, sensor);
+ break;
+ case linear:
+ default:
+ val = pmbus_reg2data_linear(data, sensor);
+ break;
+ }
+ return val;
+}
+
+#define MAX_IEEE_MANTISSA (0x7ff * 1000)
+#define MIN_IEEE_MANTISSA (0x400 * 1000)
+
+static u16 pmbus_data2reg_ieee754(struct pmbus_data *data,
+ struct pmbus_sensor *sensor, long val)
+{
+ u16 exponent = (15 + 10);
+ long mantissa;
+ u16 sign = 0;
+
+ /* simple case */
+ if (val == 0)
+ return 0;
+
+ if (val < 0) {
+ sign = 0x8000;
+ val = -val;
+ }
+
+ /* Power is in uW. Convert to mW before converting. */
+ if (sensor->class == PSC_POWER)
+ val = DIV_ROUND_CLOSEST(val, 1000L);
+
+ /*
+ * For simplicity, convert fan data to milli-units
+ * before calculating the exponent.
+ */
+ if (sensor->class == PSC_FAN)
+ val = val * 1000;
+
+ /* Reduce large mantissa until it fits into 10 bit */
+ while (val > MAX_IEEE_MANTISSA && exponent < 30) {
+ exponent++;
+ val >>= 1;
+ }
+ /*
+ * Increase small mantissa to generate valid 'normal'
+ * number
+ */
+ while (val < MIN_IEEE_MANTISSA && exponent > 1) {
+ exponent--;
+ val <<= 1;
+ }
+
+ /* Convert mantissa from milli-units to units */
+ mantissa = DIV_ROUND_CLOSEST(val, 1000);
+
+ /*
+ * Ensure that the resulting number is within range.
+ * Valid range is 0x400..0x7ff, where bit 10 reflects
+ * the implied high bit in normalized ieee754 numbers.
+ * Set the range to 0x400..0x7ff to reflect this.
+ * The upper bit is then removed by the mask against
+ * 0x3ff in the final assignment.
+ */
+ if (mantissa > 0x7ff)
+ mantissa = 0x7ff;
+ else if (mantissa < 0x400)
+ mantissa = 0x400;
+
+ /* Convert to sign, 5 bit exponent, 10 bit mantissa */
+ return sign | (mantissa & 0x3ff) | ((exponent << 10) & 0x7c00);
+}
+
+#define MAX_LIN_MANTISSA (1023 * 1000)
+#define MIN_LIN_MANTISSA (511 * 1000)
+
+static u16 pmbus_data2reg_linear(struct pmbus_data *data,
+ struct pmbus_sensor *sensor, s64 val)
+{
+ s16 exponent = 0, mantissa;
+ bool negative = false;
+
+ /* simple case */
+ if (val == 0)
+ return 0;
+
+ if (sensor->class == PSC_VOLTAGE_OUT) {
+ /* LINEAR16 does not support negative voltages */
+ if (val < 0)
+ return 0;
+
+ /*
+ * For a static exponents, we don't have a choice
+ * but to adjust the value to it.
+ */
+ if (data->exponent[sensor->page] < 0)
+ val <<= -data->exponent[sensor->page];
+ else
+ val >>= data->exponent[sensor->page];
+ val = DIV_ROUND_CLOSEST_ULL(val, 1000);
+ return clamp_val(val, 0, 0xffff);
+ }
+
+ if (val < 0) {
+ negative = true;
+ val = -val;
+ }
+
+ /* Power is in uW. Convert to mW before converting. */
+ if (sensor->class == PSC_POWER)
+ val = DIV_ROUND_CLOSEST_ULL(val, 1000);
+
+ /*
+ * For simplicity, convert fan data to milli-units
+ * before calculating the exponent.
+ */
+ if (sensor->class == PSC_FAN)
+ val = val * 1000LL;
+
+ /* Reduce large mantissa until it fits into 10 bit */
+ while (val >= MAX_LIN_MANTISSA && exponent < 15) {
+ exponent++;
+ val >>= 1;
+ }
+ /* Increase small mantissa to improve precision */
+ while (val < MIN_LIN_MANTISSA && exponent > -15) {
+ exponent--;
+ val <<= 1;
+ }
+
+ /* Convert mantissa from milli-units to units */
+ mantissa = clamp_val(DIV_ROUND_CLOSEST_ULL(val, 1000), 0, 0x3ff);
+
+ /* restore sign */
+ if (negative)
+ mantissa = -mantissa;
+
+ /* Convert to 5 bit exponent, 11 bit mantissa */
+ return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800);
+}
+
+static u16 pmbus_data2reg_direct(struct pmbus_data *data,
+ struct pmbus_sensor *sensor, s64 val)
+{
+ s64 b;
+ s32 m, R;
+
+ m = data->info->m[sensor->class];
+ b = data->info->b[sensor->class];
+ R = data->info->R[sensor->class];
+
+ /* Power is in uW. Adjust R and b. */
+ if (sensor->class == PSC_POWER) {
+ R -= 3;
+ b *= 1000;
+ }
+
+ /* Calculate Y = (m * X + b) * 10^R */
+ if (!(sensor->class == PSC_FAN || sensor->class == PSC_PWM)) {
+ R -= 3; /* Adjust R and b for data in milli-units */
+ b *= 1000;
+ }
+ val = val * m + b;
+
+ while (R > 0) {
+ val *= 10;
+ R--;
+ }
+ while (R < 0) {
+ val = div_s64(val + 5LL, 10L); /* round closest */
+ R++;
+ }
+
+ return (u16)clamp_val(val, S16_MIN, S16_MAX);
+}
+
+static u16 pmbus_data2reg_vid(struct pmbus_data *data,
+ struct pmbus_sensor *sensor, s64 val)
+{
+ val = clamp_val(val, 500, 1600);
+
+ return 2 + DIV_ROUND_CLOSEST_ULL((1600LL - val) * 100LL, 625);
+}
+
+static u16 pmbus_data2reg(struct pmbus_data *data,
+ struct pmbus_sensor *sensor, s64 val)
+{
+ u16 regval;
+
+ if (!sensor->convert)
+ return val;
+
+ switch (data->info->format[sensor->class]) {
+ case direct:
+ regval = pmbus_data2reg_direct(data, sensor, val);
+ break;
+ case vid:
+ regval = pmbus_data2reg_vid(data, sensor, val);
+ break;
+ case ieee754:
+ regval = pmbus_data2reg_ieee754(data, sensor, val);
+ break;
+ case linear:
+ default:
+ regval = pmbus_data2reg_linear(data, sensor, val);
+ break;
+ }
+ return regval;
+}
+
+/*
+ * Return boolean calculated from converted data.
+ * <index> defines a status register index and mask.
+ * The mask is in the lower 8 bits, the register index is in bits 8..23.
+ *
+ * The associated pmbus_boolean structure contains optional pointers to two
+ * sensor attributes. If specified, those attributes are compared against each
+ * other to determine if a limit has been exceeded.
+ *
+ * If the sensor attribute pointers are NULL, the function returns true if
+ * (status[reg] & mask) is true.
+ *
+ * If sensor attribute pointers are provided, a comparison against a specified
+ * limit has to be performed to determine the boolean result.
+ * In this case, the function returns true if v1 >= v2 (where v1 and v2 are
+ * sensor values referenced by sensor attribute pointers s1 and s2).
+ *
+ * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>.
+ * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>.
+ *
+ * If a negative value is stored in any of the referenced registers, this value
+ * reflects an error code which will be returned.
+ */
+static int pmbus_get_boolean(struct i2c_client *client, struct pmbus_boolean *b,
+ int index)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ struct pmbus_sensor *s1 = b->s1;
+ struct pmbus_sensor *s2 = b->s2;
+ u16 mask = pb_index_to_mask(index);
+ u8 page = pb_index_to_page(index);
+ u16 reg = pb_index_to_reg(index);
+ int ret, status;
+ u16 regval;
+
+ mutex_lock(&data->update_lock);
+ status = pmbus_get_status(client, page, reg);
+ if (status < 0) {
+ ret = status;
+ goto unlock;
+ }
+
+ if (s1)
+ pmbus_update_sensor_data(client, s1);
+ if (s2)
+ pmbus_update_sensor_data(client, s2);
+
+ regval = status & mask;
+ if (regval) {
+ ret = _pmbus_write_byte_data(client, page, reg, regval);
+ if (ret)
+ goto unlock;
+ }
+ if (s1 && s2) {
+ s64 v1, v2;
+
+ if (s1->data < 0) {
+ ret = s1->data;
+ goto unlock;
+ }
+ if (s2->data < 0) {
+ ret = s2->data;
+ goto unlock;
+ }
+
+ v1 = pmbus_reg2data(data, s1);
+ v2 = pmbus_reg2data(data, s2);
+ ret = !!(regval && v1 >= v2);
+ } else {
+ ret = !!regval;
+ }
+unlock:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static ssize_t pmbus_show_boolean(struct device *dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct pmbus_boolean *boolean = to_pmbus_boolean(attr);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ int val;
+
+ val = pmbus_get_boolean(client, boolean, attr->index);
+ if (val < 0)
+ return val;
+ return sysfs_emit(buf, "%d\n", val);
+}
+
+static ssize_t pmbus_show_sensor(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_sensor *sensor = to_pmbus_sensor(devattr);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ ssize_t ret;
+
+ mutex_lock(&data->update_lock);
+ pmbus_update_sensor_data(client, sensor);
+ if (sensor->data < 0)
+ ret = sensor->data;
+ else
+ ret = sysfs_emit(buf, "%lld\n", pmbus_reg2data(data, sensor));
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static ssize_t pmbus_set_sensor(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ struct pmbus_sensor *sensor = to_pmbus_sensor(devattr);
+ ssize_t rv = count;
+ s64 val;
+ int ret;
+ u16 regval;
+
+ if (kstrtos64(buf, 10, &val) < 0)
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ regval = pmbus_data2reg(data, sensor, val);
+ ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval);
+ if (ret < 0)
+ rv = ret;
+ else
+ sensor->data = -ENODATA;
+ mutex_unlock(&data->update_lock);
+ return rv;
+}
+
+static ssize_t pmbus_show_label(struct device *dev,
+ struct device_attribute *da, char *buf)
+{
+ struct pmbus_label *label = to_pmbus_label(da);
+
+ return sysfs_emit(buf, "%s\n", label->label);
+}
+
+static int pmbus_add_attribute(struct pmbus_data *data, struct attribute *attr)
+{
+ if (data->num_attributes >= data->max_attributes - 1) {
+ int new_max_attrs = data->max_attributes + PMBUS_ATTR_ALLOC_SIZE;
+ void *new_attrs = devm_krealloc(data->dev, data->group.attrs,
+ new_max_attrs * sizeof(void *),
+ GFP_KERNEL);
+ if (!new_attrs)
+ return -ENOMEM;
+ data->group.attrs = new_attrs;
+ data->max_attributes = new_max_attrs;
+ }
+
+ data->group.attrs[data->num_attributes++] = attr;
+ data->group.attrs[data->num_attributes] = NULL;
+ return 0;
+}
+
+static void pmbus_dev_attr_init(struct device_attribute *dev_attr,
+ const char *name,
+ umode_t mode,
+ ssize_t (*show)(struct device *dev,
+ struct device_attribute *attr,
+ char *buf),
+ ssize_t (*store)(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count))
+{
+ sysfs_attr_init(&dev_attr->attr);
+ dev_attr->attr.name = name;
+ dev_attr->attr.mode = mode;
+ dev_attr->show = show;
+ dev_attr->store = store;
+}
+
+static void pmbus_attr_init(struct sensor_device_attribute *a,
+ const char *name,
+ umode_t mode,
+ ssize_t (*show)(struct device *dev,
+ struct device_attribute *attr,
+ char *buf),
+ ssize_t (*store)(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count),
+ int idx)
+{
+ pmbus_dev_attr_init(&a->dev_attr, name, mode, show, store);
+ a->index = idx;
+}
+
+static int pmbus_add_boolean(struct pmbus_data *data,
+ const char *name, const char *type, int seq,
+ struct pmbus_sensor *s1,
+ struct pmbus_sensor *s2,
+ u8 page, u16 reg, u16 mask)
+{
+ struct pmbus_boolean *boolean;
+ struct sensor_device_attribute *a;
+
+ if (WARN((s1 && !s2) || (!s1 && s2), "Bad s1/s2 parameters\n"))
+ return -EINVAL;
+
+ boolean = devm_kzalloc(data->dev, sizeof(*boolean), GFP_KERNEL);
+ if (!boolean)
+ return -ENOMEM;
+
+ a = &boolean->attribute;
+
+ snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s",
+ name, seq, type);
+ boolean->s1 = s1;
+ boolean->s2 = s2;
+ pmbus_attr_init(a, boolean->name, 0444, pmbus_show_boolean, NULL,
+ pb_reg_to_index(page, reg, mask));
+
+ return pmbus_add_attribute(data, &a->dev_attr.attr);
+}
+
+/* of thermal for pmbus temperature sensors */
+struct pmbus_thermal_data {
+ struct pmbus_data *pmbus_data;
+ struct pmbus_sensor *sensor;
+};
+
+static int pmbus_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
+{
+ struct pmbus_thermal_data *tdata = tz->devdata;
+ struct pmbus_sensor *sensor = tdata->sensor;
+ struct pmbus_data *pmbus_data = tdata->pmbus_data;
+ struct i2c_client *client = to_i2c_client(pmbus_data->dev);
+ struct device *dev = pmbus_data->hwmon_dev;
+ int ret = 0;
+
+ if (!dev) {
+ /* May not even get to hwmon yet */
+ *temp = 0;
+ return 0;
+ }
+
+ mutex_lock(&pmbus_data->update_lock);
+ pmbus_update_sensor_data(client, sensor);
+ if (sensor->data < 0)
+ ret = sensor->data;
+ else
+ *temp = (int)pmbus_reg2data(pmbus_data, sensor);
+ mutex_unlock(&pmbus_data->update_lock);
+
+ return ret;
+}
+
+static const struct thermal_zone_device_ops pmbus_thermal_ops = {
+ .get_temp = pmbus_thermal_get_temp,
+};
+
+static int pmbus_thermal_add_sensor(struct pmbus_data *pmbus_data,
+ struct pmbus_sensor *sensor, int index)
+{
+ struct device *dev = pmbus_data->dev;
+ struct pmbus_thermal_data *tdata;
+ struct thermal_zone_device *tzd;
+
+ tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL);
+ if (!tdata)
+ return -ENOMEM;
+
+ tdata->sensor = sensor;
+ tdata->pmbus_data = pmbus_data;
+
+ tzd = devm_thermal_of_zone_register(dev, index, tdata,
+ &pmbus_thermal_ops);
+ /*
+ * If CONFIG_THERMAL_OF is disabled, this returns -ENODEV,
+ * so ignore that error but forward any other error.
+ */
+ if (IS_ERR(tzd) && (PTR_ERR(tzd) != -ENODEV))
+ return PTR_ERR(tzd);
+
+ return 0;
+}
+
+static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data,
+ const char *name, const char *type,
+ int seq, int page, int phase,
+ int reg,
+ enum pmbus_sensor_classes class,
+ bool update, bool readonly,
+ bool convert)
+{
+ struct pmbus_sensor *sensor;
+ struct device_attribute *a;
+
+ sensor = devm_kzalloc(data->dev, sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return NULL;
+ a = &sensor->attribute;
+
+ if (type)
+ snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s",
+ name, seq, type);
+ else
+ snprintf(sensor->name, sizeof(sensor->name), "%s%d",
+ name, seq);
+
+ if (data->flags & PMBUS_WRITE_PROTECTED)
+ readonly = true;
+
+ sensor->page = page;
+ sensor->phase = phase;
+ sensor->reg = reg;
+ sensor->class = class;
+ sensor->update = update;
+ sensor->convert = convert;
+ sensor->data = -ENODATA;
+ pmbus_dev_attr_init(a, sensor->name,
+ readonly ? 0444 : 0644,
+ pmbus_show_sensor, pmbus_set_sensor);
+
+ if (pmbus_add_attribute(data, &a->attr))
+ return NULL;
+
+ sensor->next = data->sensors;
+ data->sensors = sensor;
+
+ /* temperature sensors with _input values are registered with thermal */
+ if (class == PSC_TEMPERATURE && strcmp(type, "input") == 0)
+ pmbus_thermal_add_sensor(data, sensor, seq);
+
+ return sensor;
+}
+
+static int pmbus_add_label(struct pmbus_data *data,
+ const char *name, int seq,
+ const char *lstring, int index, int phase)
+{
+ struct pmbus_label *label;
+ struct device_attribute *a;
+
+ label = devm_kzalloc(data->dev, sizeof(*label), GFP_KERNEL);
+ if (!label)
+ return -ENOMEM;
+
+ a = &label->attribute;
+
+ snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq);
+ if (!index) {
+ if (phase == 0xff)
+ strncpy(label->label, lstring,
+ sizeof(label->label) - 1);
+ else
+ snprintf(label->label, sizeof(label->label), "%s.%d",
+ lstring, phase);
+ } else {
+ if (phase == 0xff)
+ snprintf(label->label, sizeof(label->label), "%s%d",
+ lstring, index);
+ else
+ snprintf(label->label, sizeof(label->label), "%s%d.%d",
+ lstring, index, phase);
+ }
+
+ pmbus_dev_attr_init(a, label->name, 0444, pmbus_show_label, NULL);
+ return pmbus_add_attribute(data, &a->attr);
+}
+
+/*
+ * Search for attributes. Allocate sensors, booleans, and labels as needed.
+ */
+
+/*
+ * The pmbus_limit_attr structure describes a single limit attribute
+ * and its associated alarm attribute.
+ */
+struct pmbus_limit_attr {
+ u16 reg; /* Limit register */
+ u16 sbit; /* Alarm attribute status bit */
+ bool update; /* True if register needs updates */
+ bool low; /* True if low limit; for limits with compare
+ functions only */
+ const char *attr; /* Attribute name */
+ const char *alarm; /* Alarm attribute name */
+};
+
+/*
+ * The pmbus_sensor_attr structure describes one sensor attribute. This
+ * description includes a reference to the associated limit attributes.
+ */
+struct pmbus_sensor_attr {
+ u16 reg; /* sensor register */
+ u16 gbit; /* generic status bit */
+ u8 nlimit; /* # of limit registers */
+ enum pmbus_sensor_classes class;/* sensor class */
+ const char *label; /* sensor label */
+ bool paged; /* true if paged sensor */
+ bool update; /* true if update needed */
+ bool compare; /* true if compare function needed */
+ u32 func; /* sensor mask */
+ u32 sfunc; /* sensor status mask */
+ int sreg; /* status register */
+ const struct pmbus_limit_attr *limit;/* limit registers */
+};
+
+/*
+ * Add a set of limit attributes and, if supported, the associated
+ * alarm attributes.
+ * returns 0 if no alarm register found, 1 if an alarm register was found,
+ * < 0 on errors.
+ */
+static int pmbus_add_limit_attrs(struct i2c_client *client,
+ struct pmbus_data *data,
+ const struct pmbus_driver_info *info,
+ const char *name, int index, int page,
+ struct pmbus_sensor *base,
+ const struct pmbus_sensor_attr *attr)
+{
+ const struct pmbus_limit_attr *l = attr->limit;
+ int nlimit = attr->nlimit;
+ int have_alarm = 0;
+ int i, ret;
+ struct pmbus_sensor *curr;
+
+ for (i = 0; i < nlimit; i++) {
+ if (pmbus_check_word_register(client, page, l->reg)) {
+ curr = pmbus_add_sensor(data, name, l->attr, index,
+ page, 0xff, l->reg, attr->class,
+ attr->update || l->update,
+ false, true);
+ if (!curr)
+ return -ENOMEM;
+ if (l->sbit && (info->func[page] & attr->sfunc)) {
+ ret = pmbus_add_boolean(data, name,
+ l->alarm, index,
+ attr->compare ? l->low ? curr : base
+ : NULL,
+ attr->compare ? l->low ? base : curr
+ : NULL,
+ page, attr->sreg, l->sbit);
+ if (ret)
+ return ret;
+ have_alarm = 1;
+ }
+ }
+ l++;
+ }
+ return have_alarm;
+}
+
+static int pmbus_add_sensor_attrs_one(struct i2c_client *client,
+ struct pmbus_data *data,
+ const struct pmbus_driver_info *info,
+ const char *name,
+ int index, int page, int phase,
+ const struct pmbus_sensor_attr *attr,
+ bool paged)
+{
+ struct pmbus_sensor *base;
+ bool upper = !!(attr->gbit & 0xff00); /* need to check STATUS_WORD */
+ int ret;
+
+ if (attr->label) {
+ ret = pmbus_add_label(data, name, index, attr->label,
+ paged ? page + 1 : 0, phase);
+ if (ret)
+ return ret;
+ }
+ base = pmbus_add_sensor(data, name, "input", index, page, phase,
+ attr->reg, attr->class, true, true, true);
+ if (!base)
+ return -ENOMEM;
+ /* No limit and alarm attributes for phase specific sensors */
+ if (attr->sfunc && phase == 0xff) {
+ ret = pmbus_add_limit_attrs(client, data, info, name,
+ index, page, base, attr);
+ if (ret < 0)
+ return ret;
+ /*
+ * Add generic alarm attribute only if there are no individual
+ * alarm attributes, if there is a global alarm bit, and if
+ * the generic status register (word or byte, depending on
+ * which global bit is set) for this page is accessible.
+ */
+ if (!ret && attr->gbit &&
+ (!upper || data->has_status_word) &&
+ pmbus_check_status_register(client, page)) {
+ ret = pmbus_add_boolean(data, name, "alarm", index,
+ NULL, NULL,
+ page, PMBUS_STATUS_WORD,
+ attr->gbit);
+ if (ret)
+ return ret;
+ }
+ }
+ return 0;
+}
+
+static bool pmbus_sensor_is_paged(const struct pmbus_driver_info *info,
+ const struct pmbus_sensor_attr *attr)
+{
+ int p;
+
+ if (attr->paged)
+ return true;
+
+ /*
+ * Some attributes may be present on more than one page despite
+ * not being marked with the paged attribute. If that is the case,
+ * then treat the sensor as being paged and add the page suffix to the
+ * attribute name.
+ * We don't just add the paged attribute to all such attributes, in
+ * order to maintain the un-suffixed labels in the case where the
+ * attribute is only on page 0.
+ */
+ for (p = 1; p < info->pages; p++) {
+ if (info->func[p] & attr->func)
+ return true;
+ }
+ return false;
+}
+
+static int pmbus_add_sensor_attrs(struct i2c_client *client,
+ struct pmbus_data *data,
+ const char *name,
+ const struct pmbus_sensor_attr *attrs,
+ int nattrs)
+{
+ const struct pmbus_driver_info *info = data->info;
+ int index, i;
+ int ret;
+
+ index = 1;
+ for (i = 0; i < nattrs; i++) {
+ int page, pages;
+ bool paged = pmbus_sensor_is_paged(info, attrs);
+
+ pages = paged ? info->pages : 1;
+ for (page = 0; page < pages; page++) {
+ if (info->func[page] & attrs->func) {
+ ret = pmbus_add_sensor_attrs_one(client, data, info,
+ name, index, page,
+ 0xff, attrs, paged);
+ if (ret)
+ return ret;
+ index++;
+ }
+ if (info->phases[page]) {
+ int phase;
+
+ for (phase = 0; phase < info->phases[page];
+ phase++) {
+ if (!(info->pfunc[phase] & attrs->func))
+ continue;
+ ret = pmbus_add_sensor_attrs_one(client,
+ data, info, name, index, page,
+ phase, attrs, paged);
+ if (ret)
+ return ret;
+ index++;
+ }
+ }
+ }
+ attrs++;
+ }
+ return 0;
+}
+
+static const struct pmbus_limit_attr vin_limit_attrs[] = {
+ {
+ .reg = PMBUS_VIN_UV_WARN_LIMIT,
+ .attr = "min",
+ .alarm = "min_alarm",
+ .sbit = PB_VOLTAGE_UV_WARNING,
+ }, {
+ .reg = PMBUS_VIN_UV_FAULT_LIMIT,
+ .attr = "lcrit",
+ .alarm = "lcrit_alarm",
+ .sbit = PB_VOLTAGE_UV_FAULT | PB_VOLTAGE_VIN_OFF,
+ }, {
+ .reg = PMBUS_VIN_OV_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "max_alarm",
+ .sbit = PB_VOLTAGE_OV_WARNING,
+ }, {
+ .reg = PMBUS_VIN_OV_FAULT_LIMIT,
+ .attr = "crit",
+ .alarm = "crit_alarm",
+ .sbit = PB_VOLTAGE_OV_FAULT,
+ }, {
+ .reg = PMBUS_VIRT_READ_VIN_AVG,
+ .update = true,
+ .attr = "average",
+ }, {
+ .reg = PMBUS_VIRT_READ_VIN_MIN,
+ .update = true,
+ .attr = "lowest",
+ }, {
+ .reg = PMBUS_VIRT_READ_VIN_MAX,
+ .update = true,
+ .attr = "highest",
+ }, {
+ .reg = PMBUS_VIRT_RESET_VIN_HISTORY,
+ .attr = "reset_history",
+ }, {
+ .reg = PMBUS_MFR_VIN_MIN,
+ .attr = "rated_min",
+ }, {
+ .reg = PMBUS_MFR_VIN_MAX,
+ .attr = "rated_max",
+ },
+};
+
+static const struct pmbus_limit_attr vmon_limit_attrs[] = {
+ {
+ .reg = PMBUS_VIRT_VMON_UV_WARN_LIMIT,
+ .attr = "min",
+ .alarm = "min_alarm",
+ .sbit = PB_VOLTAGE_UV_WARNING,
+ }, {
+ .reg = PMBUS_VIRT_VMON_UV_FAULT_LIMIT,
+ .attr = "lcrit",
+ .alarm = "lcrit_alarm",
+ .sbit = PB_VOLTAGE_UV_FAULT,
+ }, {
+ .reg = PMBUS_VIRT_VMON_OV_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "max_alarm",
+ .sbit = PB_VOLTAGE_OV_WARNING,
+ }, {
+ .reg = PMBUS_VIRT_VMON_OV_FAULT_LIMIT,
+ .attr = "crit",
+ .alarm = "crit_alarm",
+ .sbit = PB_VOLTAGE_OV_FAULT,
+ }
+};
+
+static const struct pmbus_limit_attr vout_limit_attrs[] = {
+ {
+ .reg = PMBUS_VOUT_UV_WARN_LIMIT,
+ .attr = "min",
+ .alarm = "min_alarm",
+ .sbit = PB_VOLTAGE_UV_WARNING,
+ }, {
+ .reg = PMBUS_VOUT_UV_FAULT_LIMIT,
+ .attr = "lcrit",
+ .alarm = "lcrit_alarm",
+ .sbit = PB_VOLTAGE_UV_FAULT,
+ }, {
+ .reg = PMBUS_VOUT_OV_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "max_alarm",
+ .sbit = PB_VOLTAGE_OV_WARNING,
+ }, {
+ .reg = PMBUS_VOUT_OV_FAULT_LIMIT,
+ .attr = "crit",
+ .alarm = "crit_alarm",
+ .sbit = PB_VOLTAGE_OV_FAULT,
+ }, {
+ .reg = PMBUS_VIRT_READ_VOUT_AVG,
+ .update = true,
+ .attr = "average",
+ }, {
+ .reg = PMBUS_VIRT_READ_VOUT_MIN,
+ .update = true,
+ .attr = "lowest",
+ }, {
+ .reg = PMBUS_VIRT_READ_VOUT_MAX,
+ .update = true,
+ .attr = "highest",
+ }, {
+ .reg = PMBUS_VIRT_RESET_VOUT_HISTORY,
+ .attr = "reset_history",
+ }, {
+ .reg = PMBUS_MFR_VOUT_MIN,
+ .attr = "rated_min",
+ }, {
+ .reg = PMBUS_MFR_VOUT_MAX,
+ .attr = "rated_max",
+ },
+};
+
+static const struct pmbus_sensor_attr voltage_attributes[] = {
+ {
+ .reg = PMBUS_READ_VIN,
+ .class = PSC_VOLTAGE_IN,
+ .label = "vin",
+ .func = PMBUS_HAVE_VIN,
+ .sfunc = PMBUS_HAVE_STATUS_INPUT,
+ .sreg = PMBUS_STATUS_INPUT,
+ .gbit = PB_STATUS_VIN_UV,
+ .limit = vin_limit_attrs,
+ .nlimit = ARRAY_SIZE(vin_limit_attrs),
+ }, {
+ .reg = PMBUS_VIRT_READ_VMON,
+ .class = PSC_VOLTAGE_IN,
+ .label = "vmon",
+ .func = PMBUS_HAVE_VMON,
+ .sfunc = PMBUS_HAVE_STATUS_VMON,
+ .sreg = PMBUS_VIRT_STATUS_VMON,
+ .limit = vmon_limit_attrs,
+ .nlimit = ARRAY_SIZE(vmon_limit_attrs),
+ }, {
+ .reg = PMBUS_READ_VCAP,
+ .class = PSC_VOLTAGE_IN,
+ .label = "vcap",
+ .func = PMBUS_HAVE_VCAP,
+ }, {
+ .reg = PMBUS_READ_VOUT,
+ .class = PSC_VOLTAGE_OUT,
+ .label = "vout",
+ .paged = true,
+ .func = PMBUS_HAVE_VOUT,
+ .sfunc = PMBUS_HAVE_STATUS_VOUT,
+ .sreg = PMBUS_STATUS_VOUT,
+ .gbit = PB_STATUS_VOUT_OV,
+ .limit = vout_limit_attrs,
+ .nlimit = ARRAY_SIZE(vout_limit_attrs),
+ }
+};
+
+/* Current attributes */
+
+static const struct pmbus_limit_attr iin_limit_attrs[] = {
+ {
+ .reg = PMBUS_IIN_OC_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "max_alarm",
+ .sbit = PB_IIN_OC_WARNING,
+ }, {
+ .reg = PMBUS_IIN_OC_FAULT_LIMIT,
+ .attr = "crit",
+ .alarm = "crit_alarm",
+ .sbit = PB_IIN_OC_FAULT,
+ }, {
+ .reg = PMBUS_VIRT_READ_IIN_AVG,
+ .update = true,
+ .attr = "average",
+ }, {
+ .reg = PMBUS_VIRT_READ_IIN_MIN,
+ .update = true,
+ .attr = "lowest",
+ }, {
+ .reg = PMBUS_VIRT_READ_IIN_MAX,
+ .update = true,
+ .attr = "highest",
+ }, {
+ .reg = PMBUS_VIRT_RESET_IIN_HISTORY,
+ .attr = "reset_history",
+ }, {
+ .reg = PMBUS_MFR_IIN_MAX,
+ .attr = "rated_max",
+ },
+};
+
+static const struct pmbus_limit_attr iout_limit_attrs[] = {
+ {
+ .reg = PMBUS_IOUT_OC_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "max_alarm",
+ .sbit = PB_IOUT_OC_WARNING,
+ }, {
+ .reg = PMBUS_IOUT_UC_FAULT_LIMIT,
+ .attr = "lcrit",
+ .alarm = "lcrit_alarm",
+ .sbit = PB_IOUT_UC_FAULT,
+ }, {
+ .reg = PMBUS_IOUT_OC_FAULT_LIMIT,
+ .attr = "crit",
+ .alarm = "crit_alarm",
+ .sbit = PB_IOUT_OC_FAULT,
+ }, {
+ .reg = PMBUS_VIRT_READ_IOUT_AVG,
+ .update = true,
+ .attr = "average",
+ }, {
+ .reg = PMBUS_VIRT_READ_IOUT_MIN,
+ .update = true,
+ .attr = "lowest",
+ }, {
+ .reg = PMBUS_VIRT_READ_IOUT_MAX,
+ .update = true,
+ .attr = "highest",
+ }, {
+ .reg = PMBUS_VIRT_RESET_IOUT_HISTORY,
+ .attr = "reset_history",
+ }, {
+ .reg = PMBUS_MFR_IOUT_MAX,
+ .attr = "rated_max",
+ },
+};
+
+static const struct pmbus_sensor_attr current_attributes[] = {
+ {
+ .reg = PMBUS_READ_IIN,
+ .class = PSC_CURRENT_IN,
+ .label = "iin",
+ .func = PMBUS_HAVE_IIN,
+ .sfunc = PMBUS_HAVE_STATUS_INPUT,
+ .sreg = PMBUS_STATUS_INPUT,
+ .gbit = PB_STATUS_INPUT,
+ .limit = iin_limit_attrs,
+ .nlimit = ARRAY_SIZE(iin_limit_attrs),
+ }, {
+ .reg = PMBUS_READ_IOUT,
+ .class = PSC_CURRENT_OUT,
+ .label = "iout",
+ .paged = true,
+ .func = PMBUS_HAVE_IOUT,
+ .sfunc = PMBUS_HAVE_STATUS_IOUT,
+ .sreg = PMBUS_STATUS_IOUT,
+ .gbit = PB_STATUS_IOUT_OC,
+ .limit = iout_limit_attrs,
+ .nlimit = ARRAY_SIZE(iout_limit_attrs),
+ }
+};
+
+/* Power attributes */
+
+static const struct pmbus_limit_attr pin_limit_attrs[] = {
+ {
+ .reg = PMBUS_PIN_OP_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "alarm",
+ .sbit = PB_PIN_OP_WARNING,
+ }, {
+ .reg = PMBUS_VIRT_READ_PIN_AVG,
+ .update = true,
+ .attr = "average",
+ }, {
+ .reg = PMBUS_VIRT_READ_PIN_MIN,
+ .update = true,
+ .attr = "input_lowest",
+ }, {
+ .reg = PMBUS_VIRT_READ_PIN_MAX,
+ .update = true,
+ .attr = "input_highest",
+ }, {
+ .reg = PMBUS_VIRT_RESET_PIN_HISTORY,
+ .attr = "reset_history",
+ }, {
+ .reg = PMBUS_MFR_PIN_MAX,
+ .attr = "rated_max",
+ },
+};
+
+static const struct pmbus_limit_attr pout_limit_attrs[] = {
+ {
+ .reg = PMBUS_POUT_MAX,
+ .attr = "cap",
+ .alarm = "cap_alarm",
+ .sbit = PB_POWER_LIMITING,
+ }, {
+ .reg = PMBUS_POUT_OP_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "max_alarm",
+ .sbit = PB_POUT_OP_WARNING,
+ }, {
+ .reg = PMBUS_POUT_OP_FAULT_LIMIT,
+ .attr = "crit",
+ .alarm = "crit_alarm",
+ .sbit = PB_POUT_OP_FAULT,
+ }, {
+ .reg = PMBUS_VIRT_READ_POUT_AVG,
+ .update = true,
+ .attr = "average",
+ }, {
+ .reg = PMBUS_VIRT_READ_POUT_MIN,
+ .update = true,
+ .attr = "input_lowest",
+ }, {
+ .reg = PMBUS_VIRT_READ_POUT_MAX,
+ .update = true,
+ .attr = "input_highest",
+ }, {
+ .reg = PMBUS_VIRT_RESET_POUT_HISTORY,
+ .attr = "reset_history",
+ }, {
+ .reg = PMBUS_MFR_POUT_MAX,
+ .attr = "rated_max",
+ },
+};
+
+static const struct pmbus_sensor_attr power_attributes[] = {
+ {
+ .reg = PMBUS_READ_PIN,
+ .class = PSC_POWER,
+ .label = "pin",
+ .func = PMBUS_HAVE_PIN,
+ .sfunc = PMBUS_HAVE_STATUS_INPUT,
+ .sreg = PMBUS_STATUS_INPUT,
+ .gbit = PB_STATUS_INPUT,
+ .limit = pin_limit_attrs,
+ .nlimit = ARRAY_SIZE(pin_limit_attrs),
+ }, {
+ .reg = PMBUS_READ_POUT,
+ .class = PSC_POWER,
+ .label = "pout",
+ .paged = true,
+ .func = PMBUS_HAVE_POUT,
+ .sfunc = PMBUS_HAVE_STATUS_IOUT,
+ .sreg = PMBUS_STATUS_IOUT,
+ .limit = pout_limit_attrs,
+ .nlimit = ARRAY_SIZE(pout_limit_attrs),
+ }
+};
+
+/* Temperature atributes */
+
+static const struct pmbus_limit_attr temp_limit_attrs[] = {
+ {
+ .reg = PMBUS_UT_WARN_LIMIT,
+ .low = true,
+ .attr = "min",
+ .alarm = "min_alarm",
+ .sbit = PB_TEMP_UT_WARNING,
+ }, {
+ .reg = PMBUS_UT_FAULT_LIMIT,
+ .low = true,
+ .attr = "lcrit",
+ .alarm = "lcrit_alarm",
+ .sbit = PB_TEMP_UT_FAULT,
+ }, {
+ .reg = PMBUS_OT_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "max_alarm",
+ .sbit = PB_TEMP_OT_WARNING,
+ }, {
+ .reg = PMBUS_OT_FAULT_LIMIT,
+ .attr = "crit",
+ .alarm = "crit_alarm",
+ .sbit = PB_TEMP_OT_FAULT,
+ }, {
+ .reg = PMBUS_VIRT_READ_TEMP_MIN,
+ .attr = "lowest",
+ }, {
+ .reg = PMBUS_VIRT_READ_TEMP_AVG,
+ .attr = "average",
+ }, {
+ .reg = PMBUS_VIRT_READ_TEMP_MAX,
+ .attr = "highest",
+ }, {
+ .reg = PMBUS_VIRT_RESET_TEMP_HISTORY,
+ .attr = "reset_history",
+ }, {
+ .reg = PMBUS_MFR_MAX_TEMP_1,
+ .attr = "rated_max",
+ },
+};
+
+static const struct pmbus_limit_attr temp_limit_attrs2[] = {
+ {
+ .reg = PMBUS_UT_WARN_LIMIT,
+ .low = true,
+ .attr = "min",
+ .alarm = "min_alarm",
+ .sbit = PB_TEMP_UT_WARNING,
+ }, {
+ .reg = PMBUS_UT_FAULT_LIMIT,
+ .low = true,
+ .attr = "lcrit",
+ .alarm = "lcrit_alarm",
+ .sbit = PB_TEMP_UT_FAULT,
+ }, {
+ .reg = PMBUS_OT_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "max_alarm",
+ .sbit = PB_TEMP_OT_WARNING,
+ }, {
+ .reg = PMBUS_OT_FAULT_LIMIT,
+ .attr = "crit",
+ .alarm = "crit_alarm",
+ .sbit = PB_TEMP_OT_FAULT,
+ }, {
+ .reg = PMBUS_VIRT_READ_TEMP2_MIN,
+ .attr = "lowest",
+ }, {
+ .reg = PMBUS_VIRT_READ_TEMP2_AVG,
+ .attr = "average",
+ }, {
+ .reg = PMBUS_VIRT_READ_TEMP2_MAX,
+ .attr = "highest",
+ }, {
+ .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY,
+ .attr = "reset_history",
+ }, {
+ .reg = PMBUS_MFR_MAX_TEMP_2,
+ .attr = "rated_max",
+ },
+};
+
+static const struct pmbus_limit_attr temp_limit_attrs3[] = {
+ {
+ .reg = PMBUS_UT_WARN_LIMIT,
+ .low = true,
+ .attr = "min",
+ .alarm = "min_alarm",
+ .sbit = PB_TEMP_UT_WARNING,
+ }, {
+ .reg = PMBUS_UT_FAULT_LIMIT,
+ .low = true,
+ .attr = "lcrit",
+ .alarm = "lcrit_alarm",
+ .sbit = PB_TEMP_UT_FAULT,
+ }, {
+ .reg = PMBUS_OT_WARN_LIMIT,
+ .attr = "max",
+ .alarm = "max_alarm",
+ .sbit = PB_TEMP_OT_WARNING,
+ }, {
+ .reg = PMBUS_OT_FAULT_LIMIT,
+ .attr = "crit",
+ .alarm = "crit_alarm",
+ .sbit = PB_TEMP_OT_FAULT,
+ }, {
+ .reg = PMBUS_MFR_MAX_TEMP_3,
+ .attr = "rated_max",
+ },
+};
+
+static const struct pmbus_sensor_attr temp_attributes[] = {
+ {
+ .reg = PMBUS_READ_TEMPERATURE_1,
+ .class = PSC_TEMPERATURE,
+ .paged = true,
+ .update = true,
+ .compare = true,
+ .func = PMBUS_HAVE_TEMP,
+ .sfunc = PMBUS_HAVE_STATUS_TEMP,
+ .sreg = PMBUS_STATUS_TEMPERATURE,
+ .gbit = PB_STATUS_TEMPERATURE,
+ .limit = temp_limit_attrs,
+ .nlimit = ARRAY_SIZE(temp_limit_attrs),
+ }, {
+ .reg = PMBUS_READ_TEMPERATURE_2,
+ .class = PSC_TEMPERATURE,
+ .paged = true,
+ .update = true,
+ .compare = true,
+ .func = PMBUS_HAVE_TEMP2,
+ .sfunc = PMBUS_HAVE_STATUS_TEMP,
+ .sreg = PMBUS_STATUS_TEMPERATURE,
+ .gbit = PB_STATUS_TEMPERATURE,
+ .limit = temp_limit_attrs2,
+ .nlimit = ARRAY_SIZE(temp_limit_attrs2),
+ }, {
+ .reg = PMBUS_READ_TEMPERATURE_3,
+ .class = PSC_TEMPERATURE,
+ .paged = true,
+ .update = true,
+ .compare = true,
+ .func = PMBUS_HAVE_TEMP3,
+ .sfunc = PMBUS_HAVE_STATUS_TEMP,
+ .sreg = PMBUS_STATUS_TEMPERATURE,
+ .gbit = PB_STATUS_TEMPERATURE,
+ .limit = temp_limit_attrs3,
+ .nlimit = ARRAY_SIZE(temp_limit_attrs3),
+ }
+};
+
+static const int pmbus_fan_registers[] = {
+ PMBUS_READ_FAN_SPEED_1,
+ PMBUS_READ_FAN_SPEED_2,
+ PMBUS_READ_FAN_SPEED_3,
+ PMBUS_READ_FAN_SPEED_4
+};
+
+static const int pmbus_fan_status_registers[] = {
+ PMBUS_STATUS_FAN_12,
+ PMBUS_STATUS_FAN_12,
+ PMBUS_STATUS_FAN_34,
+ PMBUS_STATUS_FAN_34
+};
+
+static const u32 pmbus_fan_flags[] = {
+ PMBUS_HAVE_FAN12,
+ PMBUS_HAVE_FAN12,
+ PMBUS_HAVE_FAN34,
+ PMBUS_HAVE_FAN34
+};
+
+static const u32 pmbus_fan_status_flags[] = {
+ PMBUS_HAVE_STATUS_FAN12,
+ PMBUS_HAVE_STATUS_FAN12,
+ PMBUS_HAVE_STATUS_FAN34,
+ PMBUS_HAVE_STATUS_FAN34
+};
+
+/* Fans */
+
+/* Precondition: FAN_CONFIG_x_y and FAN_COMMAND_x must exist for the fan ID */
+static int pmbus_add_fan_ctrl(struct i2c_client *client,
+ struct pmbus_data *data, int index, int page, int id,
+ u8 config)
+{
+ struct pmbus_sensor *sensor;
+
+ sensor = pmbus_add_sensor(data, "fan", "target", index, page,
+ 0xff, PMBUS_VIRT_FAN_TARGET_1 + id, PSC_FAN,
+ false, false, true);
+
+ if (!sensor)
+ return -ENOMEM;
+
+ if (!((data->info->func[page] & PMBUS_HAVE_PWM12) ||
+ (data->info->func[page] & PMBUS_HAVE_PWM34)))
+ return 0;
+
+ sensor = pmbus_add_sensor(data, "pwm", NULL, index, page,
+ 0xff, PMBUS_VIRT_PWM_1 + id, PSC_PWM,
+ false, false, true);
+
+ if (!sensor)
+ return -ENOMEM;
+
+ sensor = pmbus_add_sensor(data, "pwm", "enable", index, page,
+ 0xff, PMBUS_VIRT_PWM_ENABLE_1 + id, PSC_PWM,
+ true, false, false);
+
+ if (!sensor)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int pmbus_add_fan_attributes(struct i2c_client *client,
+ struct pmbus_data *data)
+{
+ const struct pmbus_driver_info *info = data->info;
+ int index = 1;
+ int page;
+ int ret;
+
+ for (page = 0; page < info->pages; page++) {
+ int f;
+
+ for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) {
+ int regval;
+
+ if (!(info->func[page] & pmbus_fan_flags[f]))
+ break;
+
+ if (!pmbus_check_word_register(client, page,
+ pmbus_fan_registers[f]))
+ break;
+
+ /*
+ * Skip fan if not installed.
+ * Each fan configuration register covers multiple fans,
+ * so we have to do some magic.
+ */
+ regval = _pmbus_read_byte_data(client, page,
+ pmbus_fan_config_registers[f]);
+ if (regval < 0 ||
+ (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4)))))
+ continue;
+
+ if (pmbus_add_sensor(data, "fan", "input", index,
+ page, 0xff, pmbus_fan_registers[f],
+ PSC_FAN, true, true, true) == NULL)
+ return -ENOMEM;
+
+ /* Fan control */
+ if (pmbus_check_word_register(client, page,
+ pmbus_fan_command_registers[f])) {
+ ret = pmbus_add_fan_ctrl(client, data, index,
+ page, f, regval);
+ if (ret < 0)
+ return ret;
+ }
+
+ /*
+ * Each fan status register covers multiple fans,
+ * so we have to do some magic.
+ */
+ if ((info->func[page] & pmbus_fan_status_flags[f]) &&
+ pmbus_check_byte_register(client,
+ page, pmbus_fan_status_registers[f])) {
+ int reg;
+
+ if (f > 1) /* fan 3, 4 */
+ reg = PMBUS_STATUS_FAN_34;
+ else
+ reg = PMBUS_STATUS_FAN_12;
+ ret = pmbus_add_boolean(data, "fan",
+ "alarm", index, NULL, NULL, page, reg,
+ PB_FAN_FAN1_WARNING >> (f & 1));
+ if (ret)
+ return ret;
+ ret = pmbus_add_boolean(data, "fan",
+ "fault", index, NULL, NULL, page, reg,
+ PB_FAN_FAN1_FAULT >> (f & 1));
+ if (ret)
+ return ret;
+ }
+ index++;
+ }
+ }
+ return 0;
+}
+
+struct pmbus_samples_attr {
+ int reg;
+ char *name;
+};
+
+struct pmbus_samples_reg {
+ int page;
+ struct pmbus_samples_attr *attr;
+ struct device_attribute dev_attr;
+};
+
+static struct pmbus_samples_attr pmbus_samples_registers[] = {
+ {
+ .reg = PMBUS_VIRT_SAMPLES,
+ .name = "samples",
+ }, {
+ .reg = PMBUS_VIRT_IN_SAMPLES,
+ .name = "in_samples",
+ }, {
+ .reg = PMBUS_VIRT_CURR_SAMPLES,
+ .name = "curr_samples",
+ }, {
+ .reg = PMBUS_VIRT_POWER_SAMPLES,
+ .name = "power_samples",
+ }, {
+ .reg = PMBUS_VIRT_TEMP_SAMPLES,
+ .name = "temp_samples",
+ }
+};
+
+#define to_samples_reg(x) container_of(x, struct pmbus_samples_reg, dev_attr)
+
+static ssize_t pmbus_show_samples(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int val;
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_samples_reg *reg = to_samples_reg(devattr);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+
+ mutex_lock(&data->update_lock);
+ val = _pmbus_read_word_data(client, reg->page, 0xff, reg->attr->reg);
+ mutex_unlock(&data->update_lock);
+ if (val < 0)
+ return val;
+
+ return sysfs_emit(buf, "%d\n", val);
+}
+
+static ssize_t pmbus_set_samples(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ int ret;
+ long val;
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_samples_reg *reg = to_samples_reg(devattr);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+
+ if (kstrtol(buf, 0, &val) < 0)
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ ret = _pmbus_write_word_data(client, reg->page, reg->attr->reg, val);
+ mutex_unlock(&data->update_lock);
+
+ return ret ? : count;
+}
+
+static int pmbus_add_samples_attr(struct pmbus_data *data, int page,
+ struct pmbus_samples_attr *attr)
+{
+ struct pmbus_samples_reg *reg;
+
+ reg = devm_kzalloc(data->dev, sizeof(*reg), GFP_KERNEL);
+ if (!reg)
+ return -ENOMEM;
+
+ reg->attr = attr;
+ reg->page = page;
+
+ pmbus_dev_attr_init(&reg->dev_attr, attr->name, 0644,
+ pmbus_show_samples, pmbus_set_samples);
+
+ return pmbus_add_attribute(data, &reg->dev_attr.attr);
+}
+
+static int pmbus_add_samples_attributes(struct i2c_client *client,
+ struct pmbus_data *data)
+{
+ const struct pmbus_driver_info *info = data->info;
+ int s;
+
+ if (!(info->func[0] & PMBUS_HAVE_SAMPLES))
+ return 0;
+
+ for (s = 0; s < ARRAY_SIZE(pmbus_samples_registers); s++) {
+ struct pmbus_samples_attr *attr;
+ int ret;
+
+ attr = &pmbus_samples_registers[s];
+ if (!pmbus_check_word_register(client, 0, attr->reg))
+ continue;
+
+ ret = pmbus_add_samples_attr(data, 0, attr);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int pmbus_find_attributes(struct i2c_client *client,
+ struct pmbus_data *data)
+{
+ int ret;
+
+ /* Voltage sensors */
+ ret = pmbus_add_sensor_attrs(client, data, "in", voltage_attributes,
+ ARRAY_SIZE(voltage_attributes));
+ if (ret)
+ return ret;
+
+ /* Current sensors */
+ ret = pmbus_add_sensor_attrs(client, data, "curr", current_attributes,
+ ARRAY_SIZE(current_attributes));
+ if (ret)
+ return ret;
+
+ /* Power sensors */
+ ret = pmbus_add_sensor_attrs(client, data, "power", power_attributes,
+ ARRAY_SIZE(power_attributes));
+ if (ret)
+ return ret;
+
+ /* Temperature sensors */
+ ret = pmbus_add_sensor_attrs(client, data, "temp", temp_attributes,
+ ARRAY_SIZE(temp_attributes));
+ if (ret)
+ return ret;
+
+ /* Fans */
+ ret = pmbus_add_fan_attributes(client, data);
+ if (ret)
+ return ret;
+
+ ret = pmbus_add_samples_attributes(client, data);
+ return ret;
+}
+
+/*
+ * The pmbus_class_attr_map structure maps one sensor class to
+ * it's corresponding sensor attributes array.
+ */
+struct pmbus_class_attr_map {
+ enum pmbus_sensor_classes class;
+ int nattr;
+ const struct pmbus_sensor_attr *attr;
+};
+
+static const struct pmbus_class_attr_map class_attr_map[] = {
+ {
+ .class = PSC_VOLTAGE_IN,
+ .attr = voltage_attributes,
+ .nattr = ARRAY_SIZE(voltage_attributes),
+ }, {
+ .class = PSC_VOLTAGE_OUT,
+ .attr = voltage_attributes,
+ .nattr = ARRAY_SIZE(voltage_attributes),
+ }, {
+ .class = PSC_CURRENT_IN,
+ .attr = current_attributes,
+ .nattr = ARRAY_SIZE(current_attributes),
+ }, {
+ .class = PSC_CURRENT_OUT,
+ .attr = current_attributes,
+ .nattr = ARRAY_SIZE(current_attributes),
+ }, {
+ .class = PSC_POWER,
+ .attr = power_attributes,
+ .nattr = ARRAY_SIZE(power_attributes),
+ }, {
+ .class = PSC_TEMPERATURE,
+ .attr = temp_attributes,
+ .nattr = ARRAY_SIZE(temp_attributes),
+ }
+};
+
+/*
+ * Read the coefficients for direct mode.
+ */
+static int pmbus_read_coefficients(struct i2c_client *client,
+ struct pmbus_driver_info *info,
+ const struct pmbus_sensor_attr *attr)
+{
+ int rv;
+ union i2c_smbus_data data;
+ enum pmbus_sensor_classes class = attr->class;
+ s8 R;
+ s16 m, b;
+
+ data.block[0] = 2;
+ data.block[1] = attr->reg;
+ data.block[2] = 0x01;
+
+ rv = i2c_smbus_xfer(client->adapter, client->addr, client->flags,
+ I2C_SMBUS_WRITE, PMBUS_COEFFICIENTS,
+ I2C_SMBUS_BLOCK_PROC_CALL, &data);
+
+ if (rv < 0)
+ return rv;
+
+ if (data.block[0] != 5)
+ return -EIO;
+
+ m = data.block[1] | (data.block[2] << 8);
+ b = data.block[3] | (data.block[4] << 8);
+ R = data.block[5];
+ info->m[class] = m;
+ info->b[class] = b;
+ info->R[class] = R;
+
+ return rv;
+}
+
+static int pmbus_init_coefficients(struct i2c_client *client,
+ struct pmbus_driver_info *info)
+{
+ int i, n, ret = -EINVAL;
+ const struct pmbus_class_attr_map *map;
+ const struct pmbus_sensor_attr *attr;
+
+ for (i = 0; i < ARRAY_SIZE(class_attr_map); i++) {
+ map = &class_attr_map[i];
+ if (info->format[map->class] != direct)
+ continue;
+ for (n = 0; n < map->nattr; n++) {
+ attr = &map->attr[n];
+ if (map->class != attr->class)
+ continue;
+ ret = pmbus_read_coefficients(client, info, attr);
+ if (ret >= 0)
+ break;
+ }
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "No coefficients found for sensor class %d\n",
+ map->class);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Identify chip parameters.
+ * This function is called for all chips.
+ */
+static int pmbus_identify_common(struct i2c_client *client,
+ struct pmbus_data *data, int page)
+{
+ int vout_mode = -1;
+
+ if (pmbus_check_byte_register(client, page, PMBUS_VOUT_MODE))
+ vout_mode = _pmbus_read_byte_data(client, page,
+ PMBUS_VOUT_MODE);
+ if (vout_mode >= 0 && vout_mode != 0xff) {
+ /*
+ * Not all chips support the VOUT_MODE command,
+ * so a failure to read it is not an error.
+ */
+ switch (vout_mode >> 5) {
+ case 0: /* linear mode */
+ if (data->info->format[PSC_VOLTAGE_OUT] != linear)
+ return -ENODEV;
+
+ data->exponent[page] = ((s8)(vout_mode << 3)) >> 3;
+ break;
+ case 1: /* VID mode */
+ if (data->info->format[PSC_VOLTAGE_OUT] != vid)
+ return -ENODEV;
+ break;
+ case 2: /* direct mode */
+ if (data->info->format[PSC_VOLTAGE_OUT] != direct)
+ return -ENODEV;
+ break;
+ case 3: /* ieee 754 half precision */
+ if (data->info->format[PSC_VOLTAGE_OUT] != ieee754)
+ return -ENODEV;
+ break;
+ default:
+ return -ENODEV;
+ }
+ }
+
+ pmbus_clear_fault_page(client, page);
+ return 0;
+}
+
+static int pmbus_read_status_byte(struct i2c_client *client, int page)
+{
+ return _pmbus_read_byte_data(client, page, PMBUS_STATUS_BYTE);
+}
+
+static int pmbus_read_status_word(struct i2c_client *client, int page)
+{
+ return _pmbus_read_word_data(client, page, 0xff, PMBUS_STATUS_WORD);
+}
+
+/* PEC attribute support */
+
+static ssize_t pec_show(struct device *dev, struct device_attribute *dummy,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+
+ return sysfs_emit(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
+}
+
+static ssize_t pec_store(struct device *dev, struct device_attribute *dummy,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ bool enable;
+ int err;
+
+ err = kstrtobool(buf, &enable);
+ if (err < 0)
+ return err;
+
+ if (enable)
+ client->flags |= I2C_CLIENT_PEC;
+ else
+ client->flags &= ~I2C_CLIENT_PEC;
+
+ return count;
+}
+
+static DEVICE_ATTR_RW(pec);
+
+static void pmbus_remove_pec(void *dev)
+{
+ device_remove_file(dev, &dev_attr_pec);
+}
+
+static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data,
+ struct pmbus_driver_info *info)
+{
+ struct device *dev = &client->dev;
+ int page, ret;
+
+ /*
+ * Figure out if PEC is enabled before accessing any other register.
+ * Make sure PEC is disabled, will be enabled later if needed.
+ */
+ client->flags &= ~I2C_CLIENT_PEC;
+
+ /* Enable PEC if the controller and bus supports it */
+ if (!(data->flags & PMBUS_NO_CAPABILITY)) {
+ ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY);
+ if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK)) {
+ if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_PEC))
+ client->flags |= I2C_CLIENT_PEC;
+ }
+ }
+
+ /*
+ * Some PMBus chips don't support PMBUS_STATUS_WORD, so try
+ * to use PMBUS_STATUS_BYTE instead if that is the case.
+ * Bail out if both registers are not supported.
+ */
+ data->read_status = pmbus_read_status_word;
+ ret = i2c_smbus_read_word_data(client, PMBUS_STATUS_WORD);
+ if (ret < 0 || ret == 0xffff) {
+ data->read_status = pmbus_read_status_byte;
+ ret = i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE);
+ if (ret < 0 || ret == 0xff) {
+ dev_err(dev, "PMBus status register not found\n");
+ return -ENODEV;
+ }
+ } else {
+ data->has_status_word = true;
+ }
+
+ /*
+ * Check if the chip is write protected. If it is, we can not clear
+ * faults, and we should not try it. Also, in that case, writes into
+ * limit registers need to be disabled.
+ */
+ if (!(data->flags & PMBUS_NO_WRITE_PROTECT)) {
+ ret = i2c_smbus_read_byte_data(client, PMBUS_WRITE_PROTECT);
+ if (ret > 0 && (ret & PB_WP_ANY))
+ data->flags |= PMBUS_WRITE_PROTECTED | PMBUS_SKIP_STATUS_CHECK;
+ }
+
+ if (data->info->pages)
+ pmbus_clear_faults(client);
+ else
+ pmbus_clear_fault_page(client, -1);
+
+ if (info->identify) {
+ ret = (*info->identify)(client, info);
+ if (ret < 0) {
+ dev_err(dev, "Chip identification failed\n");
+ return ret;
+ }
+ }
+
+ if (info->pages <= 0 || info->pages > PMBUS_PAGES) {
+ dev_err(dev, "Bad number of PMBus pages: %d\n", info->pages);
+ return -ENODEV;
+ }
+
+ for (page = 0; page < info->pages; page++) {
+ ret = pmbus_identify_common(client, data, page);
+ if (ret < 0) {
+ dev_err(dev, "Failed to identify chip capabilities\n");
+ return ret;
+ }
+ }
+
+ if (data->flags & PMBUS_USE_COEFFICIENTS_CMD) {
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BLOCK_PROC_CALL))
+ return -ENODEV;
+
+ ret = pmbus_init_coefficients(client, info);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (client->flags & I2C_CLIENT_PEC) {
+ /*
+ * If I2C_CLIENT_PEC is set here, both the I2C adapter and the
+ * chip support PEC. Add 'pec' attribute to client device to let
+ * the user control it.
+ */
+ ret = device_create_file(dev, &dev_attr_pec);
+ if (ret)
+ return ret;
+ ret = devm_add_action_or_reset(dev, pmbus_remove_pec, dev);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_REGULATOR)
+static int pmbus_regulator_is_enabled(struct regulator_dev *rdev)
+{
+ struct device *dev = rdev_get_dev(rdev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ u8 page = rdev_get_id(rdev);
+ int ret;
+
+ mutex_lock(&data->update_lock);
+ ret = _pmbus_read_byte_data(client, page, PMBUS_OPERATION);
+ mutex_unlock(&data->update_lock);
+
+ if (ret < 0)
+ return ret;
+
+ return !!(ret & PB_OPERATION_CONTROL_ON);
+}
+
+static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable)
+{
+ struct device *dev = rdev_get_dev(rdev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ u8 page = rdev_get_id(rdev);
+ int ret;
+
+ mutex_lock(&data->update_lock);
+ ret = pmbus_update_byte_data(client, page, PMBUS_OPERATION,
+ PB_OPERATION_CONTROL_ON,
+ enable ? PB_OPERATION_CONTROL_ON : 0);
+ mutex_unlock(&data->update_lock);
+
+ return ret;
+}
+
+static int pmbus_regulator_enable(struct regulator_dev *rdev)
+{
+ return _pmbus_regulator_on_off(rdev, 1);
+}
+
+static int pmbus_regulator_disable(struct regulator_dev *rdev)
+{
+ return _pmbus_regulator_on_off(rdev, 0);
+}
+
+/* A PMBus status flag and the corresponding REGULATOR_ERROR_* flag */
+struct pmbus_regulator_status_assoc {
+ int pflag, rflag;
+};
+
+/* PMBus->regulator bit mappings for a PMBus status register */
+struct pmbus_regulator_status_category {
+ int func;
+ int reg;
+ const struct pmbus_regulator_status_assoc *bits; /* zero-terminated */
+};
+
+static const struct pmbus_regulator_status_category pmbus_regulator_flag_map[] = {
+ {
+ .func = PMBUS_HAVE_STATUS_VOUT,
+ .reg = PMBUS_STATUS_VOUT,
+ .bits = (const struct pmbus_regulator_status_assoc[]) {
+ { PB_VOLTAGE_UV_WARNING, REGULATOR_ERROR_UNDER_VOLTAGE_WARN },
+ { PB_VOLTAGE_UV_FAULT, REGULATOR_ERROR_UNDER_VOLTAGE },
+ { PB_VOLTAGE_OV_WARNING, REGULATOR_ERROR_OVER_VOLTAGE_WARN },
+ { PB_VOLTAGE_OV_FAULT, REGULATOR_ERROR_REGULATION_OUT },
+ { },
+ },
+ }, {
+ .func = PMBUS_HAVE_STATUS_IOUT,
+ .reg = PMBUS_STATUS_IOUT,
+ .bits = (const struct pmbus_regulator_status_assoc[]) {
+ { PB_IOUT_OC_WARNING, REGULATOR_ERROR_OVER_CURRENT_WARN },
+ { PB_IOUT_OC_FAULT, REGULATOR_ERROR_OVER_CURRENT },
+ { PB_IOUT_OC_LV_FAULT, REGULATOR_ERROR_OVER_CURRENT },
+ { },
+ },
+ }, {
+ .func = PMBUS_HAVE_STATUS_TEMP,
+ .reg = PMBUS_STATUS_TEMPERATURE,
+ .bits = (const struct pmbus_regulator_status_assoc[]) {
+ { PB_TEMP_OT_WARNING, REGULATOR_ERROR_OVER_TEMP_WARN },
+ { PB_TEMP_OT_FAULT, REGULATOR_ERROR_OVER_TEMP },
+ { },
+ },
+ },
+};
+
+static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
+{
+ int i, status;
+ const struct pmbus_regulator_status_category *cat;
+ const struct pmbus_regulator_status_assoc *bit;
+ struct device *dev = rdev_get_dev(rdev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ u8 page = rdev_get_id(rdev);
+ int func = data->info->func[page];
+
+ *flags = 0;
+
+ mutex_lock(&data->update_lock);
+
+ for (i = 0; i < ARRAY_SIZE(pmbus_regulator_flag_map); i++) {
+ cat = &pmbus_regulator_flag_map[i];
+ if (!(func & cat->func))
+ continue;
+
+ status = _pmbus_read_byte_data(client, page, cat->reg);
+ if (status < 0) {
+ mutex_unlock(&data->update_lock);
+ return status;
+ }
+
+ for (bit = cat->bits; bit->pflag; bit++) {
+ if (status & bit->pflag)
+ *flags |= bit->rflag;
+ }
+ }
+
+ /*
+ * Map what bits of STATUS_{WORD,BYTE} we can to REGULATOR_ERROR_*
+ * bits. Some of the other bits are tempting (especially for cases
+ * where we don't have the relevant PMBUS_HAVE_STATUS_*
+ * functionality), but there's an unfortunate ambiguity in that
+ * they're defined as indicating a fault *or* a warning, so we can't
+ * easily determine whether to report REGULATOR_ERROR_<foo> or
+ * REGULATOR_ERROR_<foo>_WARN.
+ */
+ status = pmbus_get_status(client, page, PMBUS_STATUS_WORD);
+ mutex_unlock(&data->update_lock);
+ if (status < 0)
+ return status;
+
+ if (pmbus_regulator_is_enabled(rdev) && (status & PB_STATUS_OFF))
+ *flags |= REGULATOR_ERROR_FAIL;
+
+ /*
+ * Unlike most other status bits, PB_STATUS_{IOUT_OC,VOUT_OV} are
+ * defined strictly as fault indicators (not warnings).
+ */
+ if (status & PB_STATUS_IOUT_OC)
+ *flags |= REGULATOR_ERROR_OVER_CURRENT;
+ if (status & PB_STATUS_VOUT_OV)
+ *flags |= REGULATOR_ERROR_REGULATION_OUT;
+
+ /*
+ * If we haven't discovered any thermal faults or warnings via
+ * PMBUS_STATUS_TEMPERATURE, map PB_STATUS_TEMPERATURE to a warning as
+ * a (conservative) best-effort interpretation.
+ */
+ if (!(*flags & (REGULATOR_ERROR_OVER_TEMP | REGULATOR_ERROR_OVER_TEMP_WARN)) &&
+ (status & PB_STATUS_TEMPERATURE))
+ *flags |= REGULATOR_ERROR_OVER_TEMP_WARN;
+
+ return 0;
+}
+
+static int pmbus_regulator_get_low_margin(struct i2c_client *client, int page)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ struct pmbus_sensor s = {
+ .page = page,
+ .class = PSC_VOLTAGE_OUT,
+ .convert = true,
+ .data = -1,
+ };
+
+ if (data->vout_low[page] < 0) {
+ if (pmbus_check_word_register(client, page, PMBUS_MFR_VOUT_MIN))
+ s.data = _pmbus_read_word_data(client, page, 0xff,
+ PMBUS_MFR_VOUT_MIN);
+ if (s.data < 0) {
+ s.data = _pmbus_read_word_data(client, page, 0xff,
+ PMBUS_VOUT_MARGIN_LOW);
+ if (s.data < 0)
+ return s.data;
+ }
+ data->vout_low[page] = pmbus_reg2data(data, &s);
+ }
+
+ return data->vout_low[page];
+}
+
+static int pmbus_regulator_get_high_margin(struct i2c_client *client, int page)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ struct pmbus_sensor s = {
+ .page = page,
+ .class = PSC_VOLTAGE_OUT,
+ .convert = true,
+ .data = -1,
+ };
+
+ if (data->vout_high[page] < 0) {
+ if (pmbus_check_word_register(client, page, PMBUS_MFR_VOUT_MAX))
+ s.data = _pmbus_read_word_data(client, page, 0xff,
+ PMBUS_MFR_VOUT_MAX);
+ if (s.data < 0) {
+ s.data = _pmbus_read_word_data(client, page, 0xff,
+ PMBUS_VOUT_MARGIN_HIGH);
+ if (s.data < 0)
+ return s.data;
+ }
+ data->vout_high[page] = pmbus_reg2data(data, &s);
+ }
+
+ return data->vout_high[page];
+}
+
+static int pmbus_regulator_get_voltage(struct regulator_dev *rdev)
+{
+ struct device *dev = rdev_get_dev(rdev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ struct pmbus_sensor s = {
+ .page = rdev_get_id(rdev),
+ .class = PSC_VOLTAGE_OUT,
+ .convert = true,
+ };
+
+ s.data = _pmbus_read_word_data(client, s.page, 0xff, PMBUS_READ_VOUT);
+ if (s.data < 0)
+ return s.data;
+
+ return (int)pmbus_reg2data(data, &s) * 1000; /* unit is uV */
+}
+
+static int pmbus_regulator_set_voltage(struct regulator_dev *rdev, int min_uv,
+ int max_uv, unsigned int *selector)
+{
+ struct device *dev = rdev_get_dev(rdev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ struct pmbus_sensor s = {
+ .page = rdev_get_id(rdev),
+ .class = PSC_VOLTAGE_OUT,
+ .convert = true,
+ .data = -1,
+ };
+ int val = DIV_ROUND_CLOSEST(min_uv, 1000); /* convert to mV */
+ int low, high;
+
+ *selector = 0;
+
+ low = pmbus_regulator_get_low_margin(client, s.page);
+ if (low < 0)
+ return low;
+
+ high = pmbus_regulator_get_high_margin(client, s.page);
+ if (high < 0)
+ return high;
+
+ /* Make sure we are within margins */
+ if (low > val)
+ val = low;
+ if (high < val)
+ val = high;
+
+ val = pmbus_data2reg(data, &s, val);
+
+ return _pmbus_write_word_data(client, s.page, PMBUS_VOUT_COMMAND, (u16)val);
+}
+
+static int pmbus_regulator_list_voltage(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ struct device *dev = rdev_get_dev(rdev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ int val, low, high;
+
+ if (selector >= rdev->desc->n_voltages ||
+ selector < rdev->desc->linear_min_sel)
+ return -EINVAL;
+
+ selector -= rdev->desc->linear_min_sel;
+ val = DIV_ROUND_CLOSEST(rdev->desc->min_uV +
+ (rdev->desc->uV_step * selector), 1000); /* convert to mV */
+
+ low = pmbus_regulator_get_low_margin(client, rdev_get_id(rdev));
+ if (low < 0)
+ return low;
+
+ high = pmbus_regulator_get_high_margin(client, rdev_get_id(rdev));
+ if (high < 0)
+ return high;
+
+ if (val >= low && val <= high)
+ return val * 1000; /* unit is uV */
+
+ return 0;
+}
+
+const struct regulator_ops pmbus_regulator_ops = {
+ .enable = pmbus_regulator_enable,
+ .disable = pmbus_regulator_disable,
+ .is_enabled = pmbus_regulator_is_enabled,
+ .get_error_flags = pmbus_regulator_get_error_flags,
+ .get_voltage = pmbus_regulator_get_voltage,
+ .set_voltage = pmbus_regulator_set_voltage,
+ .list_voltage = pmbus_regulator_list_voltage,
+};
+EXPORT_SYMBOL_NS_GPL(pmbus_regulator_ops, PMBUS);
+
+static int pmbus_regulator_register(struct pmbus_data *data)
+{
+ struct device *dev = data->dev;
+ const struct pmbus_driver_info *info = data->info;
+ const struct pmbus_platform_data *pdata = dev_get_platdata(dev);
+ struct regulator_dev *rdev;
+ int i;
+
+ for (i = 0; i < info->num_regulators; i++) {
+ struct regulator_config config = { };
+
+ config.dev = dev;
+ config.driver_data = data;
+
+ if (pdata && pdata->reg_init_data)
+ config.init_data = &pdata->reg_init_data[i];
+
+ rdev = devm_regulator_register(dev, &info->reg_desc[i],
+ &config);
+ if (IS_ERR(rdev))
+ return dev_err_probe(dev, PTR_ERR(rdev),
+ "Failed to register %s regulator\n",
+ info->reg_desc[i].name);
+ }
+
+ return 0;
+}
+#else
+static int pmbus_regulator_register(struct pmbus_data *data)
+{
+ return 0;
+}
+#endif
+
+static struct dentry *pmbus_debugfs_dir; /* pmbus debugfs directory */
+
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+static int pmbus_debugfs_get(void *data, u64 *val)
+{
+ int rc;
+ struct pmbus_debugfs_entry *entry = data;
+
+ rc = _pmbus_read_byte_data(entry->client, entry->page, entry->reg);
+ if (rc < 0)
+ return rc;
+
+ *val = rc;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops, pmbus_debugfs_get, NULL,
+ "0x%02llx\n");
+
+static int pmbus_debugfs_get_status(void *data, u64 *val)
+{
+ int rc;
+ struct pmbus_debugfs_entry *entry = data;
+ struct pmbus_data *pdata = i2c_get_clientdata(entry->client);
+
+ rc = pdata->read_status(entry->client, entry->page);
+ if (rc < 0)
+ return rc;
+
+ *val = rc;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_status, pmbus_debugfs_get_status,
+ NULL, "0x%04llx\n");
+
+static ssize_t pmbus_debugfs_mfr_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ int rc;
+ struct pmbus_debugfs_entry *entry = file->private_data;
+ char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
+
+ rc = pmbus_read_block_data(entry->client, entry->page, entry->reg,
+ data);
+ if (rc < 0)
+ return rc;
+
+ /* Add newline at the end of a read data */
+ data[rc] = '\n';
+
+ /* Include newline into the length */
+ rc += 1;
+
+ return simple_read_from_buffer(buf, count, ppos, data, rc);
+}
+
+static const struct file_operations pmbus_debugfs_ops_mfr = {
+ .llseek = noop_llseek,
+ .read = pmbus_debugfs_mfr_read,
+ .write = NULL,
+ .open = simple_open,
+};
+
+static void pmbus_remove_debugfs(void *data)
+{
+ struct dentry *entry = data;
+
+ debugfs_remove_recursive(entry);
+}
+
+static int pmbus_init_debugfs(struct i2c_client *client,
+ struct pmbus_data *data)
+{
+ int i, idx = 0;
+ char name[PMBUS_NAME_SIZE];
+ struct pmbus_debugfs_entry *entries;
+
+ if (!pmbus_debugfs_dir)
+ return -ENODEV;
+
+ /*
+ * Create the debugfs directory for this device. Use the hwmon device
+ * name to avoid conflicts (hwmon numbers are globally unique).
+ */
+ data->debugfs = debugfs_create_dir(dev_name(data->hwmon_dev),
+ pmbus_debugfs_dir);
+ if (IS_ERR_OR_NULL(data->debugfs)) {
+ data->debugfs = NULL;
+ return -ENODEV;
+ }
+
+ /*
+ * Allocate the max possible entries we need.
+ * 6 entries device-specific
+ * 10 entries page-specific
+ */
+ entries = devm_kcalloc(data->dev,
+ 6 + data->info->pages * 10, sizeof(*entries),
+ GFP_KERNEL);
+ if (!entries)
+ return -ENOMEM;
+
+ /*
+ * Add device-specific entries.
+ * Please note that the PMBUS standard allows all registers to be
+ * page-specific.
+ * To reduce the number of debugfs entries for devices with many pages
+ * assume that values of the following registers are the same for all
+ * pages and report values only for page 0.
+ */
+ if (pmbus_check_block_register(client, 0, PMBUS_MFR_ID)) {
+ entries[idx].client = client;
+ entries[idx].page = 0;
+ entries[idx].reg = PMBUS_MFR_ID;
+ debugfs_create_file("mfr_id", 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops_mfr);
+ }
+
+ if (pmbus_check_block_register(client, 0, PMBUS_MFR_MODEL)) {
+ entries[idx].client = client;
+ entries[idx].page = 0;
+ entries[idx].reg = PMBUS_MFR_MODEL;
+ debugfs_create_file("mfr_model", 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops_mfr);
+ }
+
+ if (pmbus_check_block_register(client, 0, PMBUS_MFR_REVISION)) {
+ entries[idx].client = client;
+ entries[idx].page = 0;
+ entries[idx].reg = PMBUS_MFR_REVISION;
+ debugfs_create_file("mfr_revision", 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops_mfr);
+ }
+
+ if (pmbus_check_block_register(client, 0, PMBUS_MFR_LOCATION)) {
+ entries[idx].client = client;
+ entries[idx].page = 0;
+ entries[idx].reg = PMBUS_MFR_LOCATION;
+ debugfs_create_file("mfr_location", 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops_mfr);
+ }
+
+ if (pmbus_check_block_register(client, 0, PMBUS_MFR_DATE)) {
+ entries[idx].client = client;
+ entries[idx].page = 0;
+ entries[idx].reg = PMBUS_MFR_DATE;
+ debugfs_create_file("mfr_date", 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops_mfr);
+ }
+
+ if (pmbus_check_block_register(client, 0, PMBUS_MFR_SERIAL)) {
+ entries[idx].client = client;
+ entries[idx].page = 0;
+ entries[idx].reg = PMBUS_MFR_SERIAL;
+ debugfs_create_file("mfr_serial", 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops_mfr);
+ }
+
+ /* Add page specific entries */
+ for (i = 0; i < data->info->pages; ++i) {
+ /* Check accessibility of status register if it's not page 0 */
+ if (!i || pmbus_check_status_register(client, i)) {
+ /* No need to set reg as we have special read op. */
+ entries[idx].client = client;
+ entries[idx].page = i;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops_status);
+ }
+
+ if (data->info->func[i] & PMBUS_HAVE_STATUS_VOUT) {
+ entries[idx].client = client;
+ entries[idx].page = i;
+ entries[idx].reg = PMBUS_STATUS_VOUT;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d_vout", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops);
+ }
+
+ if (data->info->func[i] & PMBUS_HAVE_STATUS_IOUT) {
+ entries[idx].client = client;
+ entries[idx].page = i;
+ entries[idx].reg = PMBUS_STATUS_IOUT;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d_iout", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops);
+ }
+
+ if (data->info->func[i] & PMBUS_HAVE_STATUS_INPUT) {
+ entries[idx].client = client;
+ entries[idx].page = i;
+ entries[idx].reg = PMBUS_STATUS_INPUT;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d_input", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops);
+ }
+
+ if (data->info->func[i] & PMBUS_HAVE_STATUS_TEMP) {
+ entries[idx].client = client;
+ entries[idx].page = i;
+ entries[idx].reg = PMBUS_STATUS_TEMPERATURE;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d_temp", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops);
+ }
+
+ if (pmbus_check_byte_register(client, i, PMBUS_STATUS_CML)) {
+ entries[idx].client = client;
+ entries[idx].page = i;
+ entries[idx].reg = PMBUS_STATUS_CML;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d_cml", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops);
+ }
+
+ if (pmbus_check_byte_register(client, i, PMBUS_STATUS_OTHER)) {
+ entries[idx].client = client;
+ entries[idx].page = i;
+ entries[idx].reg = PMBUS_STATUS_OTHER;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d_other", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops);
+ }
+
+ if (pmbus_check_byte_register(client, i,
+ PMBUS_STATUS_MFR_SPECIFIC)) {
+ entries[idx].client = client;
+ entries[idx].page = i;
+ entries[idx].reg = PMBUS_STATUS_MFR_SPECIFIC;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d_mfr", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops);
+ }
+
+ if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN12) {
+ entries[idx].client = client;
+ entries[idx].page = i;
+ entries[idx].reg = PMBUS_STATUS_FAN_12;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan12", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops);
+ }
+
+ if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN34) {
+ entries[idx].client = client;
+ entries[idx].page = i;
+ entries[idx].reg = PMBUS_STATUS_FAN_34;
+ scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan34", i);
+ debugfs_create_file(name, 0444, data->debugfs,
+ &entries[idx++],
+ &pmbus_debugfs_ops);
+ }
+ }
+
+ return devm_add_action_or_reset(data->dev,
+ pmbus_remove_debugfs, data->debugfs);
+}
+#else
+static int pmbus_init_debugfs(struct i2c_client *client,
+ struct pmbus_data *data)
+{
+ return 0;
+}
+#endif /* IS_ENABLED(CONFIG_DEBUG_FS) */
+
+int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info)
+{
+ struct device *dev = &client->dev;
+ const struct pmbus_platform_data *pdata = dev_get_platdata(dev);
+ struct pmbus_data *data;
+ size_t groups_num = 0;
+ int ret;
+ int i;
+ char *name;
+
+ if (!info)
+ return -ENODEV;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE
+ | I2C_FUNC_SMBUS_BYTE_DATA
+ | I2C_FUNC_SMBUS_WORD_DATA))
+ return -ENODEV;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ if (info->groups)
+ while (info->groups[groups_num])
+ groups_num++;
+
+ data->groups = devm_kcalloc(dev, groups_num + 2, sizeof(void *),
+ GFP_KERNEL);
+ if (!data->groups)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+ data->dev = dev;
+
+ if (pdata)
+ data->flags = pdata->flags;
+ data->info = info;
+ data->currpage = -1;
+ data->currphase = -1;
+
+ for (i = 0; i < ARRAY_SIZE(data->vout_low); i++) {
+ data->vout_low[i] = -1;
+ data->vout_high[i] = -1;
+ }
+
+ ret = pmbus_init_common(client, data, info);
+ if (ret < 0)
+ return ret;
+
+ ret = pmbus_find_attributes(client, data);
+ if (ret)
+ return ret;
+
+ /*
+ * If there are no attributes, something is wrong.
+ * Bail out instead of trying to register nothing.
+ */
+ if (!data->num_attributes) {
+ dev_err(dev, "No attributes found\n");
+ return -ENODEV;
+ }
+
+ name = devm_kstrdup(dev, client->name, GFP_KERNEL);
+ if (!name)
+ return -ENOMEM;
+ strreplace(name, '-', '_');
+
+ data->groups[0] = &data->group;
+ memcpy(data->groups + 1, info->groups, sizeof(void *) * groups_num);
+ data->hwmon_dev = devm_hwmon_device_register_with_groups(dev,
+ name, data, data->groups);
+ if (IS_ERR(data->hwmon_dev)) {
+ dev_err(dev, "Failed to register hwmon device\n");
+ return PTR_ERR(data->hwmon_dev);
+ }
+
+ ret = pmbus_regulator_register(data);
+ if (ret)
+ return ret;
+
+ ret = pmbus_init_debugfs(client, data);
+ if (ret)
+ dev_warn(dev, "Failed to register debugfs\n");
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_do_probe, PMBUS);
+
+struct dentry *pmbus_get_debugfs_dir(struct i2c_client *client)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+
+ return data->debugfs;
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_get_debugfs_dir, PMBUS);
+
+static int __init pmbus_core_init(void)
+{
+ pmbus_debugfs_dir = debugfs_create_dir("pmbus", NULL);
+ if (IS_ERR(pmbus_debugfs_dir))
+ pmbus_debugfs_dir = NULL;
+
+ return 0;
+}
+
+static void __exit pmbus_core_exit(void)
+{
+ debugfs_remove_recursive(pmbus_debugfs_dir);
+}
+
+module_init(pmbus_core_init);
+module_exit(pmbus_core_exit);
+
+MODULE_AUTHOR("Guenter Roeck");
+MODULE_DESCRIPTION("PMBus core driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 06:50:52 +0000