Emulation/switch-linux
1
0
Fork 0
mirror of https://github.com/fail0verflow/switch-linux.git synced 2025-05-04 02:34:21 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

pwm-fan: implement enable GPIO

Browse source
This commit is contained in:
SwtcR 2018-02-11 06:15:52 +09:00
parent 1a0c6c9b58
commit 995caae57d
2 changed files with 14 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/hwmon/Kconfig
View file

@ -1278,7 +1278,7 @@ source drivers/hwmon/pmbus/Kconfig
config SENSORS_PWM_FAN config SENSORS_PWM_FAN
tristate "PWM fan" tristate "PWM fan"
depends on (PWM && OF) || COMPILE_TEST depends on (PWM && OF && GPIOLIB && OF_GPIO) || COMPILE_TEST
depends on THERMAL || THERMAL=n depends on THERMAL || THERMAL=n
help help
If you say yes here you get support for fans connected to PWM lines. If you say yes here you get support for fans connected to PWM lines.

13
drivers/hwmon/pwm-fan.c
View file

@ -18,6 +18,7 @@
#include <linux/hwmon.h> #include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h> #include <linux/hwmon-sysfs.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/of.h> #include <linux/of.h>
@ -31,6 +32,7 @@
struct pwm_fan_ctx { struct pwm_fan_ctx {
struct mutex lock; struct mutex lock;
struct pwm_device *pwm; struct pwm_device *pwm;
struct gpio_desc *enable_gpio;
unsigned int pwm_value; unsigned int pwm_value;
unsigned int pwm_fan_state; unsigned int pwm_fan_state;
unsigned int pwm_fan_max_state; unsigned int pwm_fan_max_state;
@ -56,6 +58,10 @@ static int __set_pwm(struct pwm_fan_ctx *ctx, unsigned long pwm)
ret = pwm_apply_state(ctx->pwm, &state); ret = pwm_apply_state(ctx->pwm, &state);
if (!ret) if (!ret)
ctx->pwm_value = pwm; ctx->pwm_value = pwm;
if (ctx->enable_gpio)
gpiod_set_value(ctx->enable_gpio, !!pwm);
exit_set_pwm_err: exit_set_pwm_err:
mutex_unlock(&ctx->lock); mutex_unlock(&ctx->lock);
return ret; return ret;
@ -240,6 +246,13 @@ static int pwm_fan_probe(struct platform_device *pdev)
return ret; return ret;
} }
ctx->enable_gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_HIGH);
if (IS_ERR(ctx->enable_gpio)) {
ctx->enable_gpio = NULL;
} else {
gpiod_set_value(ctx->enable_gpio, 1);
}
hwmon = devm_hwmon_device_register_with_groups(&pdev->dev, "pwmfan", hwmon = devm_hwmon_device_register_with_groups(&pdev->dev, "pwmfan",
ctx, pwm_fan_groups); ctx, pwm_fan_groups);
if (IS_ERR(hwmon)) { if (IS_ERR(hwmon)) {