diff options
| author | Alexander Stein <alexander.stein@ew.tq-group.com> | 2022-09-14 17:31:33 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2022-09-25 14:22:10 -0700 |
| commit | bf10ccad068088f4e31f4d4266356d1d24cf5734 (patch) | |
| tree | 7fde58f172c968150f49fa503658abde9d550c57 /drivers/hwmon/pwm-fan.c | |
| parent | cc842bd57e779ee242f6bcc88149dec4542ea563 (diff) | |
| download | linux-bf10ccad068088f4e31f4d4266356d1d24cf5734.tar.bz2 | |
hwmon: (pwm-fan) Refactor fan power on/off
In preparation for dynamically switching regulator, split the power on
and power off sequence into separate functions.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220914153137.613982-2-alexander.stein@ew.tq-group.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/pwm-fan.c')
| -rw-r--r-- | drivers/hwmon/pwm-fan.c | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c index 06fd1d75101d..c8a7926d39e7 100644 --- a/drivers/hwmon/pwm-fan.c +++ b/drivers/hwmon/pwm-fan.c @@ -82,23 +82,47 @@ static void sample_timer(struct timer_list *t) mod_timer(&ctx->rpm_timer, jiffies + HZ); } -static int __set_pwm(struct pwm_fan_ctx *ctx, unsigned long pwm) +static int pwm_fan_power_on(struct pwm_fan_ctx *ctx) { + struct pwm_state *state = &ctx->pwm_state; unsigned long period; - int ret = 0; + int ret; + + period = state->period; + state->duty_cycle = DIV_ROUND_UP(ctx->pwm_value * (period - 1), MAX_PWM); + state->enabled = true; + ret = pwm_apply_state(ctx->pwm, state); + + return ret; +} + +static int pwm_fan_power_off(struct pwm_fan_ctx *ctx) +{ struct pwm_state *state = &ctx->pwm_state; + state->enabled = false; + state->duty_cycle = 0; + pwm_apply_state(ctx->pwm, state); + + return 0; +} + +static int __set_pwm(struct pwm_fan_ctx *ctx, unsigned long pwm) +{ + int ret = 0; + mutex_lock(&ctx->lock); if (ctx->pwm_value == pwm) goto exit_set_pwm_err; - period = state->period; - state->duty_cycle = DIV_ROUND_UP(pwm * (period - 1), MAX_PWM); - state->enabled = pwm ? true : false; + if (pwm > 0) + ret = pwm_fan_power_on(ctx); + else + ret = pwm_fan_power_off(ctx); - ret = pwm_apply_state(ctx->pwm, state); if (!ret) ctx->pwm_value = pwm; + exit_set_pwm_err: mutex_unlock(&ctx->lock); return ret; |