diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2012-12-04 07:59:32 -0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2013-04-07 21:16:39 -0700 |
| commit | 47ece9645f288d46420d64dab90a182bde87bbbb (patch) | |
| tree | c4ec1d52e69f894abafb785327a2f72bf23ed938 /drivers/hwmon/nct6775.c | |
| parent | 5c25d954d37b7c18606d7ef99122424552b86ef2 (diff) | |
hwmon: (nct6775) Add support for fan debounce module parameter
If set, fan debounce is enabled when loading the driver.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/nct6775.c')
| -rw-r--r-- | drivers/hwmon/nct6775.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c index fea6ed7a004..ffb56bb8c27 100644 --- a/drivers/hwmon/nct6775.c +++ b/drivers/hwmon/nct6775.c @@ -72,6 +72,10 @@ static unsigned short force_id; module_param(force_id, ushort, 0); MODULE_PARM_DESC(force_id, "Override the detected device ID"); +static unsigned short fan_debounce; +module_param(fan_debounce, ushort, 0); +MODULE_PARM_DESC(fan_debounce, "Enable debouncing for fan RPM signal"); + #define DRVNAME "nct6775" /* @@ -183,6 +187,8 @@ static const u16 NCT6775_REG_IN[] = { #define NCT6775_REG_FANDIV1 0x506 #define NCT6775_REG_FANDIV2 0x507 +#define NCT6775_REG_CR_FAN_DEBOUNCE 0xf0 + static const u16 NCT6775_REG_ALARM[NUM_REG_ALARM] = { 0x459, 0x45A, 0x45B }; /* 0..15 voltages, 16..23 fans, 24..31 temperatures */ @@ -2110,6 +2116,28 @@ static int nct6775_probe(struct platform_device *pdev) */ superio_select(sio_data->sioreg, NCT6775_LD_VID); data->vid = superio_inb(sio_data->sioreg, 0xe3); + + if (fan_debounce) { + u8 tmp; + + superio_select(sio_data->sioreg, NCT6775_LD_HWM); + tmp = superio_inb(sio_data->sioreg, + NCT6775_REG_CR_FAN_DEBOUNCE); + switch (data->kind) { + case nct6775: + tmp |= 0x1e; + break; + case nct6776: + case nct6779: + tmp |= 0x3e; + break; + } + superio_outb(sio_data->sioreg, NCT6775_REG_CR_FAN_DEBOUNCE, + tmp); + dev_info(&pdev->dev, "Enabled fan debounce for chip %s\n", + data->name); + } + superio_exit(sio_data->sioreg); err = device_create_file(dev, &dev_attr_cpu0_vid); |