提交 148a5dd5 编写于 作者: F Frans Klaver 提交者: Darren Hart

eeepc-laptop: document fan_pwm conversions

eeepc_get_fan_pwm and eeepc_set_fan_pwm convert the PWM value read from
the fan to a range lmsensors understands. Unfortunately this is only
clear if you are familiar with how lmsensors handles duty cycles.

Introduce two conversion functions that document the goal of these
conversions.
Signed-off-by: NFrans Klaver <fransklaver@gmail.com>
Signed-off-by: NDarren Hart <dvhart@linux.intel.com>
上级 a5de681c
......@@ -980,18 +980,28 @@ static struct platform_driver platform_driver = {
#define EEEPC_EC_SFB0 0xD0
#define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
static inline int eeepc_pwm_to_lmsensors(int value)
{
return value * 255 / 100;
}
static inline int eeepc_lmsensors_to_pwm(int value)
{
value = clamp_val(value, 0, 255);
return value * 100 / 255;
}
static int eeepc_get_fan_pwm(void)
{
u8 value = 0;
ec_read(EEEPC_EC_FAN_PWM, &value);
return value * 255 / 100;
return eeepc_pwm_to_lmsensors(value);
}
static void eeepc_set_fan_pwm(int value)
{
value = clamp_val(value, 0, 255);
value = value * 100 / 255;
value = eeepc_lmsensors_to_pwm(value);
ec_write(EEEPC_EC_FAN_PWM, value);
}
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册