hwmon: (pwm-fan) Switch to new atomic PWM API

Switch pwm-fan driver to new atomic PWM API.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
index f9af393..70cc0d1 100644 (file)
--- a/drivers/hwmon/pwm-fan.c
+++ b/drivers/hwmon/pwm-fan.c
@@ -40,31 +40,22 @@ struct pwm_fan_ctx {
 
 static int  __set_pwm(struct pwm_fan_ctx *ctx, unsigned long pwm)
 {
-       struct pwm_args pargs;
-       unsigned long duty;
+       unsigned long period;
        int ret = 0;
-
-       pwm_get_args(ctx->pwm, &pargs);
+       struct pwm_state state = { };
 
        mutex_lock(&ctx->lock);
        if (ctx->pwm_value == pwm)
                goto exit_set_pwm_err;
 
-       duty = DIV_ROUND_UP(pwm * (pargs.period - 1), MAX_PWM);
-       ret = pwm_config(ctx->pwm, duty, pargs.period);
-       if (ret)
-               goto exit_set_pwm_err;
-
-       if (pwm == 0)
-               pwm_disable(ctx->pwm);
-
-       if (ctx->pwm_value == 0) {
-               ret = pwm_enable(ctx->pwm);
-               if (ret)
-                       goto exit_set_pwm_err;
-       }
+       pwm_init_state(ctx->pwm, &state);
+       period = ctx->pwm->args.period;
+       state.duty_cycle = DIV_ROUND_UP(pwm * (period - 1), MAX_PWM);
+       state.enabled = pwm ? true : false;
 
-       ctx->pwm_value = pwm;
+       ret = pwm_apply_state(ctx->pwm, &state);
+       if (!ret)
+               ctx->pwm_value = pwm;
 exit_set_pwm_err:
        mutex_unlock(&ctx->lock);
        return ret;
@@ -218,10 +209,9 @@ static int pwm_fan_probe(struct platform_device *pdev)
 {
        struct thermal_cooling_device *cdev;
        struct pwm_fan_ctx *ctx;
-       struct pwm_args pargs;
        struct device *hwmon;
-       int duty_cycle;
        int ret;
+       struct pwm_state state = { };
 
        ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
        if (!ctx)
@@ -237,28 +227,16 @@ static int pwm_fan_probe(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, ctx);
 
-       /*
-        * FIXME: pwm_apply_args() should be removed when switching to the
-        * atomic PWM API.
-        */
-       pwm_apply_args(ctx->pwm);
-
-       /* Set duty cycle to maximum allowed */
-       pwm_get_args(ctx->pwm, &pargs);
-
-       duty_cycle = pargs.period - 1;
        ctx->pwm_value = MAX_PWM;
 
-       ret = pwm_config(ctx->pwm, duty_cycle, pargs.period);
-       if (ret) {
-               dev_err(&pdev->dev, "Failed to configure PWM\n");
-               return ret;
-       }
+       /* Set duty cycle to maximum allowed and enable PWM output */
+       pwm_init_state(ctx->pwm, &state);
+       state.duty_cycle = ctx->pwm->args.period - 1;
+       state.enabled = true;
 
-       /* Enbale PWM output */
-       ret = pwm_enable(ctx->pwm);
+       ret = pwm_apply_state(ctx->pwm, &state);
        if (ret) {
-               dev_err(&pdev->dev, "Failed to enable PWM\n");
+               dev_err(&pdev->dev, "Failed to configure PWM\n");
                return ret;
        }
 
@@ -266,8 +244,8 @@ static int pwm_fan_probe(struct platform_device *pdev)
                                                       ctx, pwm_fan_groups);
        if (IS_ERR(hwmon)) {
                dev_err(&pdev->dev, "Failed to register hwmon device\n");
-               pwm_disable(ctx->pwm);
-               return PTR_ERR(hwmon);
+               ret = PTR_ERR(hwmon);
+               goto err_pwm_disable;
        }
 
        ret = pwm_fan_of_get_cooling_data(&pdev->dev, ctx);
@@ -282,14 +260,20 @@ static int pwm_fan_probe(struct platform_device *pdev)
                if (IS_ERR(cdev)) {
                        dev_err(&pdev->dev,
                                "Failed to register pwm-fan as cooling device");
-                       pwm_disable(ctx->pwm);
-                       return PTR_ERR(cdev);
+                       ret = PTR_ERR(cdev);
+                       goto err_pwm_disable;
                }
                ctx->cdev = cdev;
                thermal_cdev_update(cdev);
        }
 
        return 0;
+
+err_pwm_disable:
+       state.enabled = false;
+       pwm_apply_state(ctx->pwm, &state);
+
+       return ret;
 }
 
 static int pwm_fan_remove(struct platform_device *pdev)