--- /dev/null
+/*
+ * w83l786ng.c - Linux kernel driver for hardware monitoring
+ * Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation - version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA.
+ */
+
+/*
+ * Supports following chips:
+ *
+ * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
+ * w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-vid.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/jiffies.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
+
+/* Insmod parameters */
+
+static bool reset;
+module_param(reset, bool, 0);
+MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
+
+#define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2)
+#define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2)
+#define W83L786NG_REG_IN(nr) ((nr) + 0x20)
+
+#define W83L786NG_REG_FAN(nr) ((nr) + 0x28)
+#define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B)
+
+#define W83L786NG_REG_CONFIG 0x40
+#define W83L786NG_REG_ALARM1 0x41
+#define W83L786NG_REG_ALARM2 0x42
+#define W83L786NG_REG_GPIO_EN 0x47
+#define W83L786NG_REG_MAN_ID2 0x4C
+#define W83L786NG_REG_MAN_ID1 0x4D
+#define W83L786NG_REG_CHIP_ID 0x4E
+
+#define W83L786NG_REG_DIODE 0x53
+#define W83L786NG_REG_FAN_DIV 0x54
+#define W83L786NG_REG_FAN_CFG 0x80
+
+#define W83L786NG_REG_TOLERANCE 0x8D
+
+static const u8 W83L786NG_REG_TEMP[2][3] = {
+ { 0x25, /* TEMP 0 in DataSheet */
+ 0x35, /* TEMP 0 Over in DataSheet */
+ 0x36 }, /* TEMP 0 Hyst in DataSheet */
+ { 0x26, /* TEMP 1 in DataSheet */
+ 0x37, /* TEMP 1 Over in DataSheet */
+ 0x38 } /* TEMP 1 Hyst in DataSheet */
+};
+
+static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7};
+static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4};
+
+/* FAN Duty Cycle, be used to control */
+static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87};
+
+
+static inline u8
+FAN_TO_REG(long rpm, int div)
+{
+ if (rpm == 0)
+ return 255;
+ rpm = clamp_val(rpm, 1, 1000000);
+ return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
+}
+
+#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
+ ((val) == 255 ? 0 : \
+ 1350000 / ((val) * (div))))
+
+/* for temp */
+#define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \
+ : (val)) / 1000, 0, 0xff))
+#define TEMP_FROM_REG(val) (((val) & 0x80 ? \
+ (val) - 0x100 : (val)) * 1000)
+
+/*
+ * The analog voltage inputs have 8mV LSB. Since the sysfs output is
+ * in mV as would be measured on the chip input pin, need to just
+ * multiply/divide by 8 to translate from/to register values.
+ */
+#define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255))
+#define IN_FROM_REG(val) ((val) * 8)
+
+#define DIV_FROM_REG(val) (1 << (val))
+
+static inline u8
+DIV_TO_REG(long val)
+{
+ int i;
+ val = clamp_val(val, 1, 128) >> 1;
+ for (i = 0; i < 7; i++) {
+ if (val == 0)
+ break;
+ val >>= 1;
+ }
+ return (u8)i;
+}
+
+struct w83l786ng_data {
+ struct i2c_client *client;
+ struct mutex update_lock;
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+ unsigned long last_nonvolatile; /* In jiffies, last time we update the
+ * nonvolatile registers */
+
+ u8 in[3];
+ u8 in_max[3];
+ u8 in_min[3];
+ u8 fan[2];
+ u8 fan_div[2];
+ u8 fan_min[2];
+ u8 temp_type[2];
+ u8 temp[2][3];
+ u8 pwm[2];
+ u8 pwm_mode[2]; /* 0->DC variable voltage
+ * 1->PWM variable duty cycle */
+
+ u8 pwm_enable[2]; /* 1->manual
+ * 2->thermal cruise (also called SmartFan I) */
+ u8 tolerance[2];
+};
+
+static u8
+w83l786ng_read_value(struct i2c_client *client, u8 reg)
+{
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int
+w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
+{
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
+{
+ struct w83l786ng_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ int i, j;
+ u8 reg_tmp, pwmcfg;
+
+ mutex_lock(&data->update_lock);
+ if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
+ || !data->valid) {
+ dev_dbg(&client->dev, "Updating w83l786ng data.\n");
+
+ /* Update the voltages measured value and limits */
+ for (i = 0; i < 3; i++) {
+ data->in[i] = w83l786ng_read_value(client,
+ W83L786NG_REG_IN(i));
+ data->in_min[i] = w83l786ng_read_value(client,
+ W83L786NG_REG_IN_MIN(i));
+ data->in_max[i] = w83l786ng_read_value(client,
+ W83L786NG_REG_IN_MAX(i));
+ }
+
+ /* Update the fan counts and limits */
+ for (i = 0; i < 2; i++) {
+ data->fan[i] = w83l786ng_read_value(client,
+ W83L786NG_REG_FAN(i));
+ data->fan_min[i] = w83l786ng_read_value(client,
+ W83L786NG_REG_FAN_MIN(i));
+ }
+
+ /* Update the fan divisor */
+ reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
+ data->fan_div[0] = reg_tmp & 0x07;
+ data->fan_div[1] = (reg_tmp >> 4) & 0x07;
+
+ pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
+ for (i = 0; i < 2; i++) {
+ data->pwm_mode[i] =
+ ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
+ ? 0 : 1;
+ data->pwm_enable[i] =
+ ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1;
+ data->pwm[i] =
+ (w83l786ng_read_value(client, W83L786NG_REG_PWM[i])
+ & 0x0f) * 0x11;
+ }
+
+
+ /* Update the temperature sensors */
+ for (i = 0; i < 2; i++) {
+ for (j = 0; j < 3; j++) {
+ data->temp[i][j] = w83l786ng_read_value(client,
+ W83L786NG_REG_TEMP[i][j]);
+ }
+ }
+
+ /* Update Smart Fan I/II tolerance */
+ reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
+ data->tolerance[0] = reg_tmp & 0x0f;
+ data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+/* following are the sysfs callback functions */
+#define show_in_reg(reg) \
+static ssize_t \
+show_##reg(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ int nr = to_sensor_dev_attr(attr)->index; \
+ struct w83l786ng_data *data = w83l786ng_update_device(dev); \
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
+}
+
+show_in_reg(in)
+show_in_reg(in_min)
+show_in_reg(in_max)
+
+#define store_in_reg(REG, reg) \
+static ssize_t \
+store_in_##reg(struct device *dev, struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ int nr = to_sensor_dev_attr(attr)->index; \
+ struct w83l786ng_data *data = dev_get_drvdata(dev); \
+ struct i2c_client *client = data->client; \
+ unsigned long val; \
+ int err = kstrtoul(buf, 10, &val); \
+ if (err) \
+ return err; \
+ mutex_lock(&data->update_lock); \
+ data->in_##reg[nr] = IN_TO_REG(val); \
+ w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
+ data->in_##reg[nr]); \
+ mutex_unlock(&data->update_lock); \
+ return count; \
+}
+
+store_in_reg(MIN, min)
+store_in_reg(MAX, max)
+
+static struct sensor_device_attribute sda_in_input[] = {
+ SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
+ SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
+ SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
+};
+
+static struct sensor_device_attribute sda_in_min[] = {
+ SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
+ SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
+ SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
+};
+
+static struct sensor_device_attribute sda_in_max[] = {
+ SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
+ SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
+ SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
+};
+
+#define show_fan_reg(reg) \
+static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ int nr = to_sensor_dev_attr(attr)->index; \
+ struct w83l786ng_data *data = w83l786ng_update_device(dev); \
+ return sprintf(buf, "%d\n", \
+ FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \
+}
+
+show_fan_reg(fan);
+show_fan_reg(fan_min);
+
+static ssize_t
+store_fan_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct w83l786ng_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
+ w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
+ data->fan_min[nr]);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static ssize_t
+show_fan_div(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct w83l786ng_data *data = w83l786ng_update_device(dev);
+ return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
+}
+
+/*
+ * Note: we save and restore the fan minimum here, because its value is
+ * determined in part by the fan divisor. This follows the principle of
+ * least surprise; the user doesn't expect the fan minimum to change just
+ * because the divisor changed.
+ */
+static ssize_t
+store_fan_div(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct w83l786ng_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+
+ unsigned long min;
+ u8 tmp_fan_div;
+ u8 fan_div_reg;
+ u8 keep_mask = 0;
+ u8 new_shift = 0;
+
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ /* Save fan_min */
+ mutex_lock(&data->update_lock);
+ min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
+
+ data->fan_div[nr] = DIV_TO_REG(val);
+
+ switch (nr) {
+ case 0:
+ keep_mask = 0xf8;
+ new_shift = 0;
+ break;
+ case 1:
+ keep_mask = 0x8f;
+ new_shift = 4;
+ break;
+ }
+
+ fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
+ & keep_mask;
+
+ tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
+
+ w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
+ fan_div_reg | tmp_fan_div);
+
+ /* Restore fan_min */
+ data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
+ w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
+ data->fan_min[nr]);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static struct sensor_device_attribute sda_fan_input[] = {
+ SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
+ SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
+};
+
+static struct sensor_device_attribute sda_fan_min[] = {
+ SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
+ store_fan_min, 0),
+ SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
+ store_fan_min, 1),
+};
+
+static struct sensor_device_attribute sda_fan_div[] = {
+ SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
+ store_fan_div, 0),
+ SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
+ store_fan_div, 1),
+};
+
+
+/* read/write the temperature, includes measured value and limits */
+
+static ssize_t
+show_temp(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute_2 *sensor_attr =
+ to_sensor_dev_attr_2(attr);
+ int nr = sensor_attr->nr;
+ int index = sensor_attr->index;
+ struct w83l786ng_data *data = w83l786ng_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
+}
+
+static ssize_t
+store_temp(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute_2 *sensor_attr =
+ to_sensor_dev_attr_2(attr);
+ int nr = sensor_attr->nr;
+ int index = sensor_attr->index;
+ struct w83l786ng_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->temp[nr][index] = TEMP_TO_REG(val);
+ w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
+ data->temp[nr][index]);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static struct sensor_device_attribute_2 sda_temp_input[] = {
+ SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
+ SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
+};
+
+static struct sensor_device_attribute_2 sda_temp_max[] = {
+ SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
+ show_temp, store_temp, 0, 1),
+ SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
+ show_temp, store_temp, 1, 1),
+};
+
+static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
+ SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
+ show_temp, store_temp, 0, 2),
+ SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
+ show_temp, store_temp, 1, 2),
+};
+
+#define show_pwm_reg(reg) \
+static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct w83l786ng_data *data = w83l786ng_update_device(dev); \
+ int nr = to_sensor_dev_attr(attr)->index; \
+ return sprintf(buf, "%d\n", data->reg[nr]); \
+}
+
+show_pwm_reg(pwm_mode)
+show_pwm_reg(pwm_enable)
+show_pwm_reg(pwm)
+
+static ssize_t
+store_pwm_mode(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct w83l786ng_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ u8 reg;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ if (val > 1)
+ return -EINVAL;
+ mutex_lock(&data->update_lock);
+ data->pwm_mode[nr] = val;
+ reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
+ reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
+ if (!val)
+ reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
+ w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t
+store_pwm(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct w83l786ng_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+ val = clamp_val(val, 0, 255);
+ val = DIV_ROUND_CLOSEST(val, 0x11);
+
+ mutex_lock(&data->update_lock);
+ data->pwm[nr] = val * 0x11;
+ val |= w83l786ng_read_value(client, W83L786NG_REG_PWM[nr]) & 0xf0;
+ w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t
+store_pwm_enable(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct w83l786ng_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ u8 reg;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ if (!val || val > 2) /* only modes 1 and 2 are supported */
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
+ data->pwm_enable[nr] = val;
+ reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
+ reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
+ w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static struct sensor_device_attribute sda_pwm[] = {
+ SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
+ SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
+};
+
+static struct sensor_device_attribute sda_pwm_mode[] = {
+ SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
+ store_pwm_mode, 0),
+ SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
+ store_pwm_mode, 1),
+};
+
+static struct sensor_device_attribute sda_pwm_enable[] = {
+ SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
+ store_pwm_enable, 0),
+ SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
+ store_pwm_enable, 1),
+};
+
+/* For Smart Fan I/Thermal Cruise and Smart Fan II */
+static ssize_t
+show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct w83l786ng_data *data = w83l786ng_update_device(dev);
+ return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
+}
+
+static ssize_t
+store_tolerance(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct w83l786ng_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ u8 tol_tmp, tol_mask;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ tol_mask = w83l786ng_read_value(client,
+ W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
+ tol_tmp = clamp_val(val, 0, 15);
+ tol_tmp &= 0x0f;
+ data->tolerance[nr] = tol_tmp;
+ if (nr == 1)
+ tol_tmp <<= 4;
+
+ w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
+ tol_mask | tol_tmp);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static struct sensor_device_attribute sda_tolerance[] = {
+ SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
+ show_tolerance, store_tolerance, 0),
+ SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
+ show_tolerance, store_tolerance, 1),
+};
+
+
+#define IN_UNIT_ATTRS(X) \
+ &sda_in_input[X].dev_attr.attr, \
+ &sda_in_min[X].dev_attr.attr, \
+ &sda_in_max[X].dev_attr.attr
+
+#define FAN_UNIT_ATTRS(X) \
+ &sda_fan_input[X].dev_attr.attr, \
+ &sda_fan_min[X].dev_attr.attr, \
+ &sda_fan_div[X].dev_attr.attr
+
+#define TEMP_UNIT_ATTRS(X) \
+ &sda_temp_input[X].dev_attr.attr, \
+ &sda_temp_max[X].dev_attr.attr, \
+ &sda_temp_max_hyst[X].dev_attr.attr
+
+#define PWM_UNIT_ATTRS(X) \
+ &sda_pwm[X].dev_attr.attr, \
+ &sda_pwm_mode[X].dev_attr.attr, \
+ &sda_pwm_enable[X].dev_attr.attr
+
+#define TOLERANCE_UNIT_ATTRS(X) \
+ &sda_tolerance[X].dev_attr.attr
+
+static struct attribute *w83l786ng_attrs[] = {
+ IN_UNIT_ATTRS(0),
+ IN_UNIT_ATTRS(1),
+ IN_UNIT_ATTRS(2),
+ FAN_UNIT_ATTRS(0),
+ FAN_UNIT_ATTRS(1),
+ TEMP_UNIT_ATTRS(0),
+ TEMP_UNIT_ATTRS(1),
+ PWM_UNIT_ATTRS(0),
+ PWM_UNIT_ATTRS(1),
+ TOLERANCE_UNIT_ATTRS(0),
+ TOLERANCE_UNIT_ATTRS(1),
+ NULL
+};
+
+ATTRIBUTE_GROUPS(w83l786ng);
+
+static int
+w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ u16 man_id;
+ u8 chip_id;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ /* Detection */
+ if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) {
+ dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n",
+ client->addr);
+ return -ENODEV;
+ }
+
+ /* Identification */
+ man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) +
+ w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
+ chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
+
+ if (man_id != 0x5CA3 || /* Winbond */
+ chip_id != 0x80) { /* W83L786NG */
+ dev_dbg(&adapter->dev,
+ "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
+ man_id, chip_id);
+ return -ENODEV;
+ }
+
+ strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static void w83l786ng_init_client(struct i2c_client *client)
+{
+ u8 tmp;
+
+ if (reset)
+ w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
+
+ /* Start monitoring */
+ tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
+ if (!(tmp & 0x01))
+ w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
+}
+
+static int
+w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct w83l786ng_data *data;
+ struct device *hwmon_dev;
+ int i;
+ u8 reg_tmp;
+
+ data = devm_kzalloc(dev, sizeof(struct w83l786ng_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->client = client;
+ mutex_init(&data->update_lock);
+
+ /* Initialize the chip */
+ w83l786ng_init_client(client);
+
+ /* A few vars need to be filled upon startup */
+ for (i = 0; i < 2; i++) {
+ data->fan_min[i] = w83l786ng_read_value(client,
+ W83L786NG_REG_FAN_MIN(i));
+ }
+
+ /* Update the fan divisor */
+ reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
+ data->fan_div[0] = reg_tmp & 0x07;
+ data->fan_div[1] = (reg_tmp >> 4) & 0x07;
+
+ hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+ data,
+ w83l786ng_groups);
+ return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct i2c_device_id w83l786ng_id[] = {
+ { "w83l786ng", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, w83l786ng_id);
+
+static struct i2c_driver w83l786ng_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "w83l786ng",
+ },
+ .probe = w83l786ng_probe,
+ .id_table = w83l786ng_id,
+ .detect = w83l786ng_detect,
+ .address_list = normal_i2c,
+};
+
+module_i2c_driver(w83l786ng_driver);
+
+MODULE_AUTHOR("Kevin Lo");
+MODULE_DESCRIPTION("w83l786ng driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff