diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/hwmon/w83795.c | 38 |
2 files changed, 29 insertions, 18 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 811e6c47e7e..783a3144ffd 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1229,18 +1229,19 @@ config SENSORS_W83795 depends on I2C && EXPERIMENTAL help If you say yes here you get support for the Winbond W83795G and - W83795ADG hardware monitoring chip. + W83795ADG hardware monitoring chip, including manual fan speed + control. This driver can also be built as a module. If so, the module will be called w83795. config SENSORS_W83795_FANCTRL - boolean "Include fan control support (DANGEROUS)" + boolean "Include automatic fan control support (DANGEROUS)" depends on SENSORS_W83795 && EXPERIMENTAL default n help - If you say yes here, support for the both manual and automatic - fan control features will be included in the driver. + If you say yes here, support for automatic fan speed control + will be included in the driver. This part of the code wasn't carefully reviewed and tested yet, so enabling this option is strongly discouraged on production diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c index deb12c98280..5478dd13623 100644 --- a/drivers/hwmon/w83795.c +++ b/drivers/hwmon/w83795.c @@ -929,6 +929,14 @@ store_pwm_enable(struct device *dev, struct device_attribute *attr, if (val < 1 || val > 2) return -EINVAL; +#ifndef CONFIG_SENSORS_W83795_FANCTRL + if (val > 1) { + dev_warn(dev, "Automatic fan speed control support disabled\n"); + dev_warn(dev, "Build with CONFIG_SENSORS_W83795_FANCTRL=y if you want it\n"); + return -EOPNOTSUPP; + } +#endif + mutex_lock(&data->update_lock); switch (val) { case 1: @@ -1625,18 +1633,18 @@ store_sf_setup(struct device *dev, struct device_attribute *attr, #define SENSOR_ATTR_PWM(index) { \ SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \ store_pwm, PWM_OUTPUT, index - 1), \ + SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO, \ + show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \ + SENSOR_ATTR_2(pwm##index##_mode, S_IRUGO, \ + show_pwm_mode, NULL, NOT_USED, index - 1), \ + SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO, \ + show_pwm, store_pwm, PWM_FREQ, index - 1), \ SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \ show_pwm, store_pwm, PWM_NONSTOP, index - 1), \ SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \ show_pwm, store_pwm, PWM_START, index - 1), \ SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \ show_pwm, store_pwm, PWM_STOP_TIME, index - 1), \ - SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO, \ - show_pwm, store_pwm, PWM_FREQ, index - 1), \ - SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO, \ - show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \ - SENSOR_ATTR_2(pwm##index##_mode, S_IRUGO, \ - show_pwm_mode, NULL, NOT_USED, index - 1), \ SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \ show_fanin, store_fanin, FANIN_TARGET, index - 1) } @@ -1953,6 +1961,14 @@ static int w83795_detect(struct i2c_client *client, return 0; } +#ifdef CONFIG_SENSORS_W83795_FANCTRL +#define NUM_PWM_ATTRIBUTES ARRAY_SIZE(w83795_pwm[0]) +#define NUM_TEMP_ATTRIBUTES ARRAY_SIZE(w83795_temp[0]) +#else +#define NUM_PWM_ATTRIBUTES 4 +#define NUM_TEMP_ATTRIBUTES 8 +#endif + static int w83795_handle_files(struct device *dev, int (*fn)(struct device *, const struct device_attribute *)) { @@ -2006,24 +2022,18 @@ static int w83795_handle_files(struct device *dev, int (*fn)(struct device *, } } -#ifdef CONFIG_SENSORS_W83795_FANCTRL for (i = 0; i < data->has_pwm; i++) { - for (j = 0; j < ARRAY_SIZE(w83795_pwm[0]); j++) { + for (j = 0; j < NUM_PWM_ATTRIBUTES; j++) { err = fn(dev, &w83795_pwm[i][j].dev_attr); if (err) return err; } } -#endif for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) { if (!(data->has_temp & (1 << i))) continue; -#ifdef CONFIG_SENSORS_W83795_FANCTRL - for (j = 0; j < ARRAY_SIZE(w83795_temp[0]); j++) { -#else - for (j = 0; j < 8; j++) { -#endif + for (j = 0; j < NUM_TEMP_ATTRIBUTES; j++) { if (j == 7 && !data->enable_beep) continue; err = fn(dev, &w83795_temp[i][j].dev_attr); |