diff options
Diffstat (limited to 'drivers/hwmon/pmbus/pmbus_core.c')
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus_core.c | 2672 |
1 files changed, 2672 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..117e3ce9c --- /dev/null +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -0,0 +1,2672 @@ +// 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 "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 */ +}; + +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_GPL(pmbus_clear_cache); + +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_GPL(pmbus_set_page); + +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_GPL(pmbus_write_byte); + +/* + * _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_GPL(pmbus_write_word_data); + + +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); +} + +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_GPL(pmbus_update_fan); + +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_GPL(pmbus_read_word_data); + +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_GPL(pmbus_read_byte_data); + +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_GPL(pmbus_write_byte_data); + +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_GPL(pmbus_update_byte_data); + +/* + * _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); +} + +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_GPL(pmbus_get_fan_rate_device); + +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_GPL(pmbus_get_fan_rate_cached); + +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_GPL(pmbus_clear_faults); + +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); + 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_GPL(pmbus_check_byte_register); + +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_GPL(pmbus_check_word_register); + +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_GPL(pmbus_get_driver_info); + +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 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 linear: + default: + val = pmbus_reg2data_linear(data, sensor); + break; + } + return val; +} + +#define MAX_MANTISSA (1023 * 1000) +#define MIN_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_MANTISSA && exponent < 15) { + exponent++; + val >>= 1; + } + /* Increase small mantissa to improve precision */ + while (val < MIN_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 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 snprintf(buf, PAGE_SIZE, "%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 = snprintf(buf, PAGE_SIZE, "%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 = regval; + 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 snprintf(buf, PAGE_SIZE, "%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); +} + +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; + + 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 || (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)) + continue; + 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 snprintf(buf, PAGE_SIZE, "%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(®->dev_attr, attr->name, 0644, + pmbus_show_samples, pmbus_set_samples); + + return pmbus_add_attribute(data, ®->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; +} + +/* + * 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; + 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); +} + +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; + + /* + * 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; + } + + /* Enable PEC if the controller supports it */ + ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY); + if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK)) + client->flags |= I2C_CLIENT_PEC; + + /* + * 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. + */ + 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; + } + } + 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); +} + +const struct regulator_ops pmbus_regulator_ops = { + .enable = pmbus_regulator_enable, + .disable = pmbus_regulator_disable, + .is_enabled = pmbus_regulator_is_enabled, +}; +EXPORT_SYMBOL_GPL(pmbus_regulator_ops); + +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)) { + dev_err(dev, "Failed to register %s regulator\n", + info->reg_desc[i].name); + return PTR_ERR(rdev); + } + } + + 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 int pmbus_debugfs_get_pec(void *data, u64 *val) +{ + struct i2c_client *client = data; + + *val = !!(client->flags & I2C_CLIENT_PEC); + + return 0; +} + +static int pmbus_debugfs_set_pec(void *data, u64 val) +{ + int rc; + struct i2c_client *client = data; + + if (!val) { + client->flags &= ~I2C_CLIENT_PEC; + return 0; + } + + if (val != 1) + return -EINVAL; + + rc = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY); + if (rc < 0) + return rc; + + if (!(rc & PB_CAPABILITY_ERROR_CHECK)) + return -EOPNOTSUPP; + + client->flags |= I2C_CLIENT_PEC; + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_pec, pmbus_debugfs_get_pec, + pmbus_debugfs_set_pec, "%llu\n"); + +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. */ + entries = devm_kcalloc(data->dev, + data->info->pages * 10, sizeof(*entries), + GFP_KERNEL); + if (!entries) + return -ENOMEM; + + debugfs_create_file("pec", 0664, data->debugfs, client, + &pmbus_debugfs_ops_pec); + + 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 0; +} +#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; + + 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; + + 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; + } + + 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, + client->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_GPL(pmbus_do_probe); + +int pmbus_do_remove(struct i2c_client *client) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + + debugfs_remove_recursive(data->debugfs); + + return 0; +} +EXPORT_SYMBOL_GPL(pmbus_do_remove); + +struct dentry *pmbus_get_debugfs_dir(struct i2c_client *client) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + + return data->debugfs; +} +EXPORT_SYMBOL_GPL(pmbus_get_debugfs_dir); + +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"); |