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hwmon: (pc87427) Fix multi-line comments

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Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Guenter Roeck 2012-01-19 11:02:23 -08:00 committed by Guenter Roeck
parent b6707b78ff
commit 36564efadd
1 changed files with 45 additions and 27 deletions
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72
drivers/hwmon/pc87427.c
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@ -46,9 +46,11 @@ static struct platform_device *pdev;
#define DRVNAME "pc87427" #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 lock mutex protects both the I/O accesses (needed because the
the data in the registers and the cache in sync at any time). */ * 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 pc87427_data {
struct device *hwmon_dev; struct device *hwmon_dev;
struct mutex lock; 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_LOSPD (1 << 1)
#define FAN_STATUS_MONEN (1 << 0) #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. * Dedicated function to read all registers related to a given fan input.
Must be called with data->lock held. * This saves us quite a few locks and bank selections.
nr is from 0 to 7 */ * Must be called with data->lock held.
* nr is from 0 to 7
*/
static void pc87427_readall_fan(struct pc87427_data *data, u8 nr) static void pc87427_readall_fan(struct pc87427_data *data, u8 nr)
{ {
int iobase = data->address[LD_FAN]; 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); 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) static inline unsigned long fan_from_reg(u16 reg)
{ {
reg &= 0xfffc; reg &= 0xfffc;
@ -224,10 +230,12 @@ static inline u16 fan_to_reg(unsigned long val)
#define PWM_MODE_OFF (2 << 4) #define PWM_MODE_OFF (2 << 4)
#define PWM_MODE_ON (7 << 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. * Dedicated function to read all registers related to a given PWM output.
Must be called with data->lock held. * This saves us quite a few locks and bank selections.
nr is from 0 to 3 */ * Must be called with data->lock held.
* nr is from 0 to 3
*/
static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr) static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr)
{ {
int iobase = data->address[LD_FAN]; 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_REMOTE_DIODE (2 << 5)
#define TEMP_TYPE_LOCAL_DIODE (3 << 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. * Dedicated function to read all registers related to a given temperature
Must be called with data->lock held. * input. This saves us quite a few locks and bank selections.
nr is from 0 to 5 */ * Must be called with data->lock held.
* nr is from 0 to 5
*/
static void pc87427_readall_temp(struct pc87427_data *data, u8 nr) static void pc87427_readall_temp(struct pc87427_data *data, u8 nr)
{ {
int iobase = data->address[LD_TEMP]; 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) static inline long temp_from_reg(s16 reg)
{ {
return reg * 1000 / 256; return reg * 1000 / 256;
@ -423,9 +435,11 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute
mutex_lock(&data->lock); mutex_lock(&data->lock);
outb(BANK_FM(nr), iobase + PC87427_REG_BANK); 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 * The low speed limit registers are read-only while monitoring
limit, and finally enable monitoring again. */ * is enabled, so we have to disable monitoring, then change the
* limit, and finally enable monitoring again.
*/
outb(0, iobase + PC87427_REG_FAN_STATUS); outb(0, iobase + PC87427_REG_FAN_STATUS);
data->fan_min[nr] = fan_to_reg(val); data->fan_min[nr] = fan_to_reg(val);
outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN); 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] }, { .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) static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode)
{ {
int iobase = data->address[LD_FAN]; int iobase = data->address[LD_FAN];
@ -1023,9 +1039,11 @@ static void __devinit pc87427_init_device(struct device *dev)
if (reg & PWM_ENABLE_CTLEN) if (reg & PWM_ENABLE_CTLEN)
data->pwm_enabled |= (1 << i); 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 * We don't expose an interface to reconfigure the automatic
it was originally set. */ * 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) { if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {
dev_dbg(dev, "PWM%d is in automatic control mode\n", dev_dbg(dev, "PWM%d is in automatic control mode\n",
i + 1); i + 1);