Messages in this thread | | | Date | Wed, 21 May 2014 20:32:24 -0700 | From | Guenter Roeck <> | Subject | Re: [PATCH] i8k: increase fan limit to 3 |
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On 05/21/2014 07:19 PM, Flavio Leitner wrote: > From: Flavio Leitner <fbl@sysclose.org> > > It is possible to increase left fan speed on a > DELL Precision 490n system up to 3. > > value fan rpm > 1 35460 > 2 64740 > 3 78510 > Guess the speed factor 30 doesn't apply here.
> Signed-off-by: Flavio Leitner <fbl@sysclose.org> > --- > drivers/char/i8k.c | 4 ++-- > include/uapi/linux/i8k.h | 3 ++- > 2 files changed, 4 insertions(+), 3 deletions(-) > > diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c > index d915707..99180f0 100644 > --- a/drivers/char/i8k.c > +++ b/drivers/char/i8k.c > @@ -519,7 +519,7 @@ static ssize_t i8k_hwmon_show_pwm(struct device *dev, > status = i8k_get_fan_status(index); > if (status < 0) > return -EIO; > - return sprintf(buf, "%d\n", clamp_val(status * 128, 0, 255)); > + return sprintf(buf, "%d\n", clamp_val(status * 128, 0, 384)); > } > > static ssize_t i8k_hwmon_set_pwm(struct device *dev, > @@ -533,7 +533,7 @@ static ssize_t i8k_hwmon_set_pwm(struct device *dev, > err = kstrtoul(buf, 10, &val); > if (err) > return err; > - val = clamp_val(DIV_ROUND_CLOSEST(val, 128), 0, 2); > + val = clamp_val(DIV_ROUND_CLOSEST(val, 128), 0, 3); > > mutex_lock(&i8k_mutex); > err = i8k_set_fan(index, val); > diff --git a/include/uapi/linux/i8k.h b/include/uapi/linux/i8k.h > index 1c45ba5..133d02f 100644 > --- a/include/uapi/linux/i8k.h > +++ b/include/uapi/linux/i8k.h > @@ -34,7 +34,8 @@ > #define I8K_FAN_OFF 0 > #define I8K_FAN_LOW 1 > #define I8K_FAN_HIGH 2 > -#define I8K_FAN_MAX I8K_FAN_HIGH > +#define I8K_FAN_TURBO 3 > +#define I8K_FAN_MAX I8K_FAN_TURBO > > #define I8K_VOL_UP 1 > #define I8K_VOL_DOWN 2 >
I'll have to test this on older systems to make sure it doesn't cause problems there.
Guenter
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