diff options
Diffstat (limited to 'drivers/hwmon/pc87427.c')
| -rw-r--r-- | drivers/hwmon/pc87427.c | 72 |
1 files changed, 45 insertions, 27 deletions
diff --git a/drivers/hwmon/pc87427.c b/drivers/hwmon/pc87427.c index cb35461d52d9..37059a3755e9 100644 --- a/drivers/hwmon/pc87427.c +++ b/drivers/hwmon/pc87427.c @@ -46,9 +46,11 @@ static struct platform_device *pdev; #define DRVNAME "pc87427" -/* The lock mutex protects both the I/O accesses (needed because the - device is using banked registers) and the register cache (needed to keep - the data in the registers and the cache in sync at any time). */ +/* + * The lock mutex protects both the I/O accesses (needed because the + * device is using banked registers) and the register cache (needed to keep + * the data in the registers and the cache in sync at any time). + */ struct pc87427_data { struct device *hwmon_dev; struct mutex lock; @@ -173,10 +175,12 @@ static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi, #define FAN_STATUS_LOSPD (1 << 1) #define FAN_STATUS_MONEN (1 << 0) -/* Dedicated function to read all registers related to a given fan input. - This saves us quite a few locks and bank selections. - Must be called with data->lock held. - nr is from 0 to 7 */ +/* + * Dedicated function to read all registers related to a given fan input. + * This saves us quite a few locks and bank selections. + * Must be called with data->lock held. + * nr is from 0 to 7 + */ static void pc87427_readall_fan(struct pc87427_data *data, u8 nr) { int iobase = data->address[LD_FAN]; @@ -189,8 +193,10 @@ static void pc87427_readall_fan(struct pc87427_data *data, u8 nr) outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS); } -/* The 2 LSB of fan speed registers are used for something different. - The actual 2 LSB of the measurements are not available. */ +/* + * The 2 LSB of fan speed registers are used for something different. + * The actual 2 LSB of the measurements are not available. + */ static inline unsigned long fan_from_reg(u16 reg) { reg &= 0xfffc; @@ -224,10 +230,12 @@ static inline u16 fan_to_reg(unsigned long val) #define PWM_MODE_OFF (2 << 4) #define PWM_MODE_ON (7 << 4) -/* Dedicated function to read all registers related to a given PWM output. - This saves us quite a few locks and bank selections. - Must be called with data->lock held. - nr is from 0 to 3 */ +/* + * Dedicated function to read all registers related to a given PWM output. + * This saves us quite a few locks and bank selections. + * Must be called with data->lock held. + * nr is from 0 to 3 + */ static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr) { int iobase = data->address[LD_FAN]; @@ -286,10 +294,12 @@ static inline u8 pwm_enable_to_reg(unsigned long val, u8 pwmval) #define TEMP_TYPE_REMOTE_DIODE (2 << 5) #define TEMP_TYPE_LOCAL_DIODE (3 << 5) -/* Dedicated function to read all registers related to a given temperature - input. This saves us quite a few locks and bank selections. - Must be called with data->lock held. - nr is from 0 to 5 */ +/* + * Dedicated function to read all registers related to a given temperature + * input. This saves us quite a few locks and bank selections. + * Must be called with data->lock held. + * nr is from 0 to 5 + */ static void pc87427_readall_temp(struct pc87427_data *data, u8 nr) { int iobase = data->address[LD_TEMP]; @@ -318,8 +328,10 @@ static inline unsigned int temp_type_from_reg(u8 reg) } } -/* We assume 8-bit thermal sensors; 9-bit thermal sensors are possible - too, but I have no idea how to figure out when they are used. */ +/* + * We assume 8-bit thermal sensors; 9-bit thermal sensors are possible + * too, but I have no idea how to figure out when they are used. + */ static inline long temp_from_reg(s16 reg) { return reg * 1000 / 256; @@ -423,9 +435,11 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute mutex_lock(&data->lock); outb(BANK_FM(nr), iobase + PC87427_REG_BANK); - /* The low speed limit registers are read-only while monitoring - is enabled, so we have to disable monitoring, then change the - limit, and finally enable monitoring again. */ + /* + * The low speed limit registers are read-only while monitoring + * is enabled, so we have to disable monitoring, then change the + * limit, and finally enable monitoring again. + */ outb(0, iobase + PC87427_REG_FAN_STATUS); data->fan_min[nr] = fan_to_reg(val); outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN); @@ -542,8 +556,10 @@ static const struct attribute_group pc87427_group_fan[8] = { { .attrs = pc87427_attributes_fan[7] }, }; -/* Must be called with data->lock held and pc87427_readall_pwm() freshly - called */ +/* + * Must be called with data->lock held and pc87427_readall_pwm() freshly + * called + */ static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode) { int iobase = data->address[LD_FAN]; @@ -1023,9 +1039,11 @@ static void __devinit pc87427_init_device(struct device *dev) if (reg & PWM_ENABLE_CTLEN) data->pwm_enabled |= (1 << i); - /* We don't expose an interface to reconfigure the automatic - fan control mode, so only allow to return to this mode if - it was originally set. */ + /* + * We don't expose an interface to reconfigure the automatic + * fan control mode, so only allow to return to this mode if + * it was originally set. + */ if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) { dev_dbg(dev, "PWM%d is in automatic control mode\n", i + 1); |