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-rw-r--r--drivers/hwmon/adm9240.c885
1 files changed, 885 insertions, 0 deletions
diff --git a/drivers/hwmon/adm9240.c b/drivers/hwmon/adm9240.c
new file mode 100644
index 000000000..cc3e0184e
--- /dev/null
+++ b/drivers/hwmon/adm9240.c
@@ -0,0 +1,885 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * adm9240.c Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ *
+ * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl>
+ * Philip Edelbrock <phil@netroedge.com>
+ * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl>
+ * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable
+ * guidance from Jean Delvare
+ *
+ * Driver supports Analog Devices ADM9240
+ * Dallas Semiconductor DS1780
+ * National Semiconductor LM81
+ *
+ * ADM9240 is the reference, DS1780 and LM81 are register compatibles
+ *
+ * Voltage Six inputs are scaled by chip, VID also reported
+ * Temperature Chip temperature to 0.5'C, maximum and max_hysteris
+ * Fans 2 fans, low speed alarm, automatic fan clock divider
+ * Alarms 16-bit map of active alarms
+ * Analog Out 0..1250 mV output
+ *
+ * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm'
+ *
+ * Test hardware: Intel SE440BX-2 desktop motherboard --Grant
+ *
+ * LM81 extended temp reading not implemented
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-vid.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/jiffies.h>
+#include <linux/regmap.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
+ I2C_CLIENT_END };
+
+enum chips { adm9240, ds1780, lm81 };
+
+/* ADM9240 registers */
+#define ADM9240_REG_MAN_ID 0x3e
+#define ADM9240_REG_DIE_REV 0x3f
+#define ADM9240_REG_CONFIG 0x40
+
+#define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
+#define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
+#define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
+#define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
+#define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
+#define ADM9240_REG_INT(nr) (0x41 + (nr))
+#define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
+#define ADM9240_REG_TEMP 0x27
+#define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
+#define ADM9240_REG_ANALOG_OUT 0x19
+#define ADM9240_REG_CHASSIS_CLEAR 0x46
+#define ADM9240_REG_VID_FAN_DIV 0x47
+#define ADM9240_REG_I2C_ADDR 0x48
+#define ADM9240_REG_VID4 0x49
+#define ADM9240_REG_TEMP_CONF 0x4b
+
+/* generalised scaling with integer rounding */
+static inline int SCALE(long val, int mul, int div)
+{
+ if (val < 0)
+ return (val * mul - div / 2) / div;
+ else
+ return (val * mul + div / 2) / div;
+}
+
+/* adm9240 internally scales voltage measurements */
+static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
+
+static inline unsigned int IN_FROM_REG(u8 reg, int n)
+{
+ return SCALE(reg, nom_mv[n], 192);
+}
+
+static inline u8 IN_TO_REG(unsigned long val, int n)
+{
+ val = clamp_val(val, 0, nom_mv[n] * 255 / 192);
+ return SCALE(val, 192, nom_mv[n]);
+}
+
+/* temperature range: -40..125, 127 disables temperature alarm */
+static inline s8 TEMP_TO_REG(long val)
+{
+ val = clamp_val(val, -40000, 127000);
+ return SCALE(val, 1, 1000);
+}
+
+/* two fans, each with low fan speed limit */
+static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
+{
+ if (!reg) /* error */
+ return -1;
+
+ if (reg == 255)
+ return 0;
+
+ return SCALE(1350000, 1, reg * div);
+}
+
+/* analog out 0..1250mV */
+static inline u8 AOUT_TO_REG(unsigned long val)
+{
+ val = clamp_val(val, 0, 1250);
+ return SCALE(val, 255, 1250);
+}
+
+static inline unsigned int AOUT_FROM_REG(u8 reg)
+{
+ return SCALE(reg, 1250, 255);
+}
+
+/* per client data */
+struct adm9240_data {
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct mutex update_lock;
+ char valid;
+ unsigned long last_updated_measure;
+ unsigned long last_updated_config;
+
+ u8 in[6]; /* ro in0_input */
+ u8 in_max[6]; /* rw in0_max */
+ u8 in_min[6]; /* rw in0_min */
+ u8 fan[2]; /* ro fan1_input */
+ u8 fan_min[2]; /* rw fan1_min */
+ u8 fan_div[2]; /* rw fan1_div, read-only accessor */
+ s16 temp; /* ro temp1_input, 9-bit sign-extended */
+ s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
+ u16 alarms; /* ro alarms */
+ u8 aout; /* rw aout_output */
+ u8 vid; /* ro vid */
+ u8 vrm; /* -- vrm set on startup, no accessor */
+};
+
+/* write new fan div, callers must hold data->update_lock */
+static int adm9240_write_fan_div(struct adm9240_data *data, int nr,
+ u8 fan_div)
+{
+ unsigned int reg, old, shift = (nr + 2) * 2;
+ int err;
+
+ err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, &reg);
+ if (err < 0)
+ return err;
+ old = (reg >> shift) & 3;
+ reg &= ~(3 << shift);
+ reg |= (fan_div << shift);
+ err = regmap_write(data->regmap, ADM9240_REG_VID_FAN_DIV, reg);
+ if (err < 0)
+ return err;
+ dev_dbg(&data->client->dev,
+ "fan%d clock divider changed from %u to %u\n",
+ nr + 1, 1 << old, 1 << fan_div);
+
+ return 0;
+}
+
+static int adm9240_update_measure(struct adm9240_data *data)
+{
+ unsigned int val;
+ u8 regs[2];
+ int err;
+ int i;
+
+ err = regmap_bulk_read(data->regmap, ADM9240_REG_IN(0), &data->in[0], 6);
+ if (err < 0)
+ return err;
+ err = regmap_bulk_read(data->regmap, ADM9240_REG_INT(0), &regs, 2);
+ if (err < 0)
+ return err;
+
+ data->alarms = regs[0] | regs[1] << 8;
+
+ /*
+ * read temperature: assume temperature changes less than
+ * 0.5'C per two measurement cycles thus ignore possible
+ * but unlikely aliasing error on lsb reading. --Grant
+ */
+ err = regmap_read(data->regmap, ADM9240_REG_TEMP, &val);
+ if (err < 0)
+ return err;
+ data->temp = val << 8;
+ err = regmap_read(data->regmap, ADM9240_REG_TEMP_CONF, &val);
+ if (err < 0)
+ return err;
+ data->temp |= val;
+
+ err = regmap_bulk_read(data->regmap, ADM9240_REG_FAN(0),
+ &data->fan[0], 2);
+ if (err < 0)
+ return err;
+
+ for (i = 0; i < 2; i++) { /* read fans */
+ /* adjust fan clock divider on overflow */
+ if (data->valid && data->fan[i] == 255 &&
+ data->fan_div[i] < 3) {
+
+ err = adm9240_write_fan_div(data, i,
+ ++data->fan_div[i]);
+ if (err < 0)
+ return err;
+
+ /* adjust fan_min if active, but not to 0 */
+ if (data->fan_min[i] < 255 &&
+ data->fan_min[i] >= 2)
+ data->fan_min[i] /= 2;
+ }
+ }
+
+ return 0;
+}
+
+static int adm9240_update_config(struct adm9240_data *data)
+{
+ unsigned int val;
+ int i;
+ int err;
+
+ for (i = 0; i < 6; i++) {
+ err = regmap_raw_read(data->regmap, ADM9240_REG_IN_MIN(i),
+ &data->in_min[i], 1);
+ if (err < 0)
+ return err;
+ err = regmap_raw_read(data->regmap, ADM9240_REG_IN_MAX(i),
+ &data->in_max[i], 1);
+ if (err < 0)
+ return err;
+ }
+ err = regmap_bulk_read(data->regmap, ADM9240_REG_FAN_MIN(0),
+ &data->fan_min[0], 2);
+ if (err < 0)
+ return err;
+ err = regmap_bulk_read(data->regmap, ADM9240_REG_TEMP_MAX(0),
+ &data->temp_max[0], 2);
+ if (err < 0)
+ return err;
+
+ /* read fan divs and 5-bit VID */
+ err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, &val);
+ if (err < 0)
+ return err;
+ data->fan_div[0] = (val >> 4) & 3;
+ data->fan_div[1] = (val >> 6) & 3;
+ data->vid = val & 0x0f;
+ err = regmap_read(data->regmap, ADM9240_REG_VID4, &val);
+ if (err < 0)
+ return err;
+ data->vid |= (val & 1) << 4;
+ /* read analog out */
+ err = regmap_raw_read(data->regmap, ADM9240_REG_ANALOG_OUT,
+ &data->aout, 1);
+
+ return err;
+}
+
+static struct adm9240_data *adm9240_update_device(struct device *dev)
+{
+ struct adm9240_data *data = dev_get_drvdata(dev);
+ int err;
+
+ mutex_lock(&data->update_lock);
+
+ /* minimum measurement cycle: 1.75 seconds */
+ if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
+ || !data->valid) {
+ err = adm9240_update_measure(data);
+ if (err < 0) {
+ data->valid = 0;
+ mutex_unlock(&data->update_lock);
+ return ERR_PTR(err);
+ }
+ data->last_updated_measure = jiffies;
+ }
+
+ /* minimum config reading cycle: 300 seconds */
+ if (time_after(jiffies, data->last_updated_config + (HZ * 300))
+ || !data->valid) {
+ err = adm9240_update_config(data);
+ if (err < 0) {
+ data->valid = 0;
+ mutex_unlock(&data->update_lock);
+ return ERR_PTR(err);
+ }
+ data->last_updated_config = jiffies;
+ data->valid = 1;
+ }
+ mutex_unlock(&data->update_lock);
+ return data;
+}
+
+/*** sysfs accessors ***/
+
+/* temperature */
+static ssize_t temp1_input_show(struct device *dev,
+ struct device_attribute *dummy, char *buf)
+{
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", data->temp / 128 * 500); /* 9-bit value */
+}
+
+static ssize_t max_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
+}
+
+static ssize_t max_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = dev_get_drvdata(dev);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->temp_max[attr->index] = TEMP_TO_REG(val);
+ err = regmap_write(data->regmap, ADM9240_REG_TEMP_MAX(attr->index),
+ data->temp_max[attr->index]);
+ mutex_unlock(&data->update_lock);
+ return err < 0 ? err : count;
+}
+
+static DEVICE_ATTR_RO(temp1_input);
+static SENSOR_DEVICE_ATTR_RW(temp1_max, max, 0);
+static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, max, 1);
+
+/* voltage */
+static ssize_t in_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
+ attr->index));
+}
+
+static ssize_t in_min_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
+ attr->index));
+}
+
+static ssize_t in_max_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
+ attr->index));
+}
+
+static ssize_t in_min_store(struct device *dev,
+ struct device_attribute *devattr, const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = dev_get_drvdata(dev);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->in_min[attr->index] = IN_TO_REG(val, attr->index);
+ err = regmap_write(data->regmap, ADM9240_REG_IN_MIN(attr->index),
+ data->in_min[attr->index]);
+ mutex_unlock(&data->update_lock);
+ return err < 0 ? err : count;
+}
+
+static ssize_t in_max_store(struct device *dev,
+ struct device_attribute *devattr, const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = dev_get_drvdata(dev);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->in_max[attr->index] = IN_TO_REG(val, attr->index);
+ err = regmap_write(data->regmap, ADM9240_REG_IN_MAX(attr->index),
+ data->in_max[attr->index]);
+ mutex_unlock(&data->update_lock);
+ return err < 0 ? err : count;
+}
+
+static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
+static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
+static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
+static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
+static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
+static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
+static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
+static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
+static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
+static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
+static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
+static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
+static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
+static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
+static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
+static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5);
+static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5);
+static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5);
+
+/* fans */
+static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
+ 1 << data->fan_div[attr->index]));
+}
+
+static ssize_t fan_min_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
+ 1 << data->fan_div[attr->index]));
+}
+
+static ssize_t fan_div_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
+}
+
+/*
+ * set fan speed low limit:
+ *
+ * - value is zero: disable fan speed low limit alarm
+ *
+ * - value is below fan speed measurement range: enable fan speed low
+ * limit alarm to be asserted while fan speed too slow to measure
+ *
+ * - otherwise: select fan clock divider to suit fan speed low limit,
+ * measurement code may adjust registers to ensure fan speed reading
+ */
+static ssize_t fan_min_store(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ int nr = attr->index;
+ u8 new_div;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+
+ if (!val) {
+ data->fan_min[nr] = 255;
+ new_div = data->fan_div[nr];
+
+ dev_dbg(&client->dev, "fan%u low limit set disabled\n",
+ nr + 1);
+
+ } else if (val < 1350000 / (8 * 254)) {
+ new_div = 3;
+ data->fan_min[nr] = 254;
+
+ dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
+ nr + 1, FAN_FROM_REG(254, 1 << new_div));
+
+ } else {
+ unsigned int new_min = 1350000 / val;
+
+ new_div = 0;
+ while (new_min > 192 && new_div < 3) {
+ new_div++;
+ new_min /= 2;
+ }
+ if (!new_min) /* keep > 0 */
+ new_min++;
+
+ data->fan_min[nr] = new_min;
+
+ dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
+ nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
+ }
+
+ if (new_div != data->fan_div[nr]) {
+ data->fan_div[nr] = new_div;
+ adm9240_write_fan_div(data, nr, new_div);
+ }
+ err = regmap_write(data->regmap, ADM9240_REG_FAN_MIN(nr),
+ data->fan_min[nr]);
+
+ mutex_unlock(&data->update_lock);
+ return err < 0 ? err : count;
+}
+
+static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
+static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
+static SENSOR_DEVICE_ATTR_RO(fan1_div, fan_div, 0);
+static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
+static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
+static SENSOR_DEVICE_ATTR_RO(fan2_div, fan_div, 1);
+
+/* alarms */
+static ssize_t alarms_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%u\n", data->alarms);
+}
+static DEVICE_ATTR_RO(alarms);
+
+static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
+}
+static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
+static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
+static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
+static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
+static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
+static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9);
+static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
+static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
+static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
+
+/* vid */
+static ssize_t cpu0_vid_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
+}
+static DEVICE_ATTR_RO(cpu0_vid);
+
+/* analog output */
+static ssize_t aout_output_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct adm9240_data *data = adm9240_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
+}
+
+static ssize_t aout_output_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct adm9240_data *data = dev_get_drvdata(dev);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->aout = AOUT_TO_REG(val);
+ err = regmap_write(data->regmap, ADM9240_REG_ANALOG_OUT, data->aout);
+ mutex_unlock(&data->update_lock);
+ return err < 0 ? err : count;
+}
+static DEVICE_ATTR_RW(aout_output);
+
+static ssize_t alarm_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct adm9240_data *data = dev_get_drvdata(dev);
+ unsigned long val;
+ int err;
+
+ if (kstrtoul(buf, 10, &val) || val != 0)
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ err = regmap_write(data->regmap, ADM9240_REG_CHASSIS_CLEAR, 0x80);
+ data->valid = 0; /* Force cache refresh */
+ mutex_unlock(&data->update_lock);
+ if (err < 0)
+ return err;
+ dev_dbg(&data->client->dev, "chassis intrusion latch cleared\n");
+
+ return count;
+}
+static SENSOR_DEVICE_ATTR_RW(intrusion0_alarm, alarm, 12);
+
+static struct attribute *adm9240_attrs[] = {
+ &sensor_dev_attr_in0_input.dev_attr.attr,
+ &sensor_dev_attr_in0_min.dev_attr.attr,
+ &sensor_dev_attr_in0_max.dev_attr.attr,
+ &sensor_dev_attr_in0_alarm.dev_attr.attr,
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in1_min.dev_attr.attr,
+ &sensor_dev_attr_in1_max.dev_attr.attr,
+ &sensor_dev_attr_in1_alarm.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in2_min.dev_attr.attr,
+ &sensor_dev_attr_in2_max.dev_attr.attr,
+ &sensor_dev_attr_in2_alarm.dev_attr.attr,
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+ &sensor_dev_attr_in3_min.dev_attr.attr,
+ &sensor_dev_attr_in3_max.dev_attr.attr,
+ &sensor_dev_attr_in3_alarm.dev_attr.attr,
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in4_min.dev_attr.attr,
+ &sensor_dev_attr_in4_max.dev_attr.attr,
+ &sensor_dev_attr_in4_alarm.dev_attr.attr,
+ &sensor_dev_attr_in5_input.dev_attr.attr,
+ &sensor_dev_attr_in5_min.dev_attr.attr,
+ &sensor_dev_attr_in5_max.dev_attr.attr,
+ &sensor_dev_attr_in5_alarm.dev_attr.attr,
+ &dev_attr_temp1_input.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
+ &sensor_dev_attr_temp1_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_div.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_div.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_alarm.dev_attr.attr,
+ &dev_attr_alarms.attr,
+ &dev_attr_aout_output.attr,
+ &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
+ &dev_attr_cpu0_vid.attr,
+ NULL
+};
+
+ATTRIBUTE_GROUPS(adm9240);
+
+/*** sensor chip detect and driver install ***/
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int adm9240_detect(struct i2c_client *new_client,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = new_client->adapter;
+ const char *name = "";
+ int address = new_client->addr;
+ u8 man_id, die_rev;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ /* verify chip: reg address should match i2c address */
+ if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
+ != address) {
+ dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n",
+ address);
+ return -ENODEV;
+ }
+
+ /* check known chip manufacturer */
+ man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID);
+ if (man_id == 0x23) {
+ name = "adm9240";
+ } else if (man_id == 0xda) {
+ name = "ds1780";
+ } else if (man_id == 0x01) {
+ name = "lm81";
+ } else {
+ dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n",
+ man_id);
+ return -ENODEV;
+ }
+
+ /* successful detect, print chip info */
+ die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV);
+ dev_info(&adapter->dev, "found %s revision %u\n",
+ man_id == 0x23 ? "ADM9240" :
+ man_id == 0xda ? "DS1780" : "LM81", die_rev);
+
+ strlcpy(info->type, name, I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int adm9240_init_client(struct i2c_client *client, struct adm9240_data *data)
+{
+ u8 conf, mode;
+ int err;
+
+ err = regmap_raw_read(data->regmap, ADM9240_REG_CONFIG, &conf, 1);
+ if (err < 0)
+ return err;
+ err = regmap_raw_read(data->regmap, ADM9240_REG_TEMP_CONF, &mode, 1);
+ if (err < 0)
+ return err;
+ mode &= 3;
+
+ data->vrm = vid_which_vrm(); /* need this to report vid as mV */
+
+ dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
+ data->vrm % 10);
+
+ if (conf & 1) { /* measurement cycle running: report state */
+
+ dev_info(&client->dev, "status: config 0x%02x mode %u\n",
+ conf, mode);
+
+ } else { /* cold start: open limits before starting chip */
+ int i;
+
+ for (i = 0; i < 6; i++) {
+ err = regmap_write(data->regmap,
+ ADM9240_REG_IN_MIN(i), 0);
+ if (err < 0)
+ return err;
+ err = regmap_write(data->regmap,
+ ADM9240_REG_IN_MAX(i), 255);
+ if (err < 0)
+ return err;
+ }
+ for (i = 0; i < 2; i++) {
+ err = regmap_write(data->regmap,
+ ADM9240_REG_FAN_MIN(i), 255);
+ if (err < 0)
+ return err;
+ }
+ for (i = 0; i < 2; i++) {
+ err = regmap_write(data->regmap,
+ ADM9240_REG_TEMP_MAX(i), 127);
+ if (err < 0)
+ return err;
+ }
+
+ /* start measurement cycle */
+ err = regmap_write(data->regmap, ADM9240_REG_CONFIG, 1);
+ if (err < 0)
+ return err;
+
+ dev_info(&client->dev,
+ "cold start: config was 0x%02x mode %u\n", conf, mode);
+ }
+
+ return 0;
+}
+
+static const struct regmap_config adm9240_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .use_single_read = true,
+ .use_single_write = true,
+};
+
+static int adm9240_probe(struct i2c_client *new_client)
+{
+ struct device *dev = &new_client->dev;
+ struct device *hwmon_dev;
+ struct adm9240_data *data;
+ int err;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->client = new_client;
+ mutex_init(&data->update_lock);
+ data->regmap = devm_regmap_init_i2c(new_client, &adm9240_regmap_config);
+ if (IS_ERR(data->regmap))
+ return PTR_ERR(data->regmap);
+
+ err = adm9240_init_client(new_client, data);
+ if (err < 0)
+ return err;
+
+ hwmon_dev = devm_hwmon_device_register_with_groups(dev,
+ new_client->name,
+ data,
+ adm9240_groups);
+ return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct i2c_device_id adm9240_id[] = {
+ { "adm9240", adm9240 },
+ { "ds1780", ds1780 },
+ { "lm81", lm81 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adm9240_id);
+
+static struct i2c_driver adm9240_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "adm9240",
+ },
+ .probe_new = adm9240_probe,
+ .id_table = adm9240_id,
+ .detect = adm9240_detect,
+ .address_list = normal_i2c,
+};
+
+module_i2c_driver(adm9240_driver);
+
+MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
+ "Grant Coady <gcoady.lk@gmail.com> and others");
+MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 22:31:28 +0000