diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/w83627ehf.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c index 460292bad74a..d18031944960 100644 --- a/drivers/hwmon/w83627ehf.c +++ b/drivers/hwmon/w83627ehf.c @@ -79,6 +79,10 @@ 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 "w83627ehf" /* @@ -187,6 +191,7 @@ static const u16 W83627EHF_REG_TEMP_CONFIG[] = { 0, 0x152, 0x252, 0 }; /* NCT6775F has its own fan divider registers */ #define NCT6775_REG_FANDIV1 0x506 #define NCT6775_REG_FANDIV2 0x507 +#define NCT6775_REG_FAN_DEBOUNCE 0xf0 #define W83627EHF_REG_ALARM1 0x459 #define W83627EHF_REG_ALARM2 0x45A @@ -2089,6 +2094,22 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev) fan5pin = !(superio_inb(sio_data->sioreg, 0x24) & 0x02); fan4min = fan4pin; } + + if (fan_debounce && + (sio_data->kind == nct6775 || sio_data->kind == nct6776)) { + u8 tmp; + + superio_select(sio_data->sioreg, W83627EHF_LD_HWM); + tmp = superio_inb(sio_data->sioreg, NCT6775_REG_FAN_DEBOUNCE); + if (sio_data->kind == nct6776) + superio_outb(sio_data->sioreg, NCT6775_REG_FAN_DEBOUNCE, + 0x3e | tmp); + else + superio_outb(sio_data->sioreg, NCT6775_REG_FAN_DEBOUNCE, + 0x1e | tmp); + pr_info("Enabled fan debounce for chip %s\n", data->name); + } + superio_exit(sio_data->sioreg); /* It looks like fan4 and fan5 pins can be alternatively used |