hwmon: Make use of devm_clk_get_enabled()

Several drivers manually register a devm handler to disable their clk.
Convert them to devm_clk_get_enabled().
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/axi-fan-control.c

@@ -394,11 +394,6 @@ static int axi_fan_control_init(struct axi_fan_control_data *ctl,
 	return ret;
 }
 
-static void axi_fan_control_clk_disable(void *clk)
-{
-	clk_disable_unprepare(clk);
-}
-
 static const struct hwmon_channel_info *axi_fan_control_info[] = {
 	HWMON_CHANNEL_INFO(pwm, HWMON_PWM_INPUT),
 	HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_FAULT | HWMON_F_LABEL),
@@ -478,20 +473,12 @@ static int axi_fan_control_probe(struct platform_device *pdev)
 	if (IS_ERR(ctl->base))
 		return PTR_ERR(ctl->base);
 
-	clk = devm_clk_get(&pdev->dev, NULL);
+	clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(clk)) {
 		dev_err(&pdev->dev, "clk_get failed with %ld\n", PTR_ERR(clk));
 		return PTR_ERR(clk);
 	}
 
-	ret = clk_prepare_enable(clk);
-	if (ret)
-		return ret;
-
-	ret = devm_add_action_or_reset(&pdev->dev, axi_fan_control_clk_disable, clk);
-	if (ret)
-		return ret;
-
 	ctl->clk_rate = clk_get_rate(clk);
 	if (!ctl->clk_rate)
 		return -EINVAL;

drivers/hwmon/ltc2947-core.c

@@ -956,13 +956,6 @@ static struct attribute *ltc2947_attrs[] = {
 };
 ATTRIBUTE_GROUPS(ltc2947);
 
-static void ltc2947_clk_disable(void *data)
-{
-	struct clk *extclk = data;
-
-	clk_disable_unprepare(extclk);
-}
-
 static int ltc2947_setup(struct ltc2947_data *st)
 {
 	int ret;
@@ -989,7 +982,7 @@ static int ltc2947_setup(struct ltc2947_data *st)
 		return ret;
 
 	/* check external clock presence */
-	extclk = devm_clk_get_optional(st->dev, NULL);
+	extclk = devm_clk_get_optional_enabled(st->dev, NULL);
 	if (IS_ERR(extclk))
 		return dev_err_probe(st->dev, PTR_ERR(extclk),
 				     "Failed to get external clock\n");
@@ -1007,14 +1000,6 @@ static int ltc2947_setup(struct ltc2947_data *st)
 			return -EINVAL;
 		}
 
-		ret = clk_prepare_enable(extclk);
-		if (ret)
-			return ret;
-
-		ret = devm_add_action_or_reset(st->dev, ltc2947_clk_disable,
-					       extclk);
-		if (ret)
-			return ret;
 		/* as in table 1 of the datasheet */
 		if (rate_hz >= LTC2947_CLK_MIN && rate_hz <= 1000000)
 			pre = 0;

drivers/hwmon/mr75203.c

@@ -610,24 +610,6 @@ static int pvt_get_regmap(struct platform_device *pdev, char *reg_name,
 	return 0;
 }
 
-static void pvt_clk_disable(void *data)
-{
-	struct pvt_device *pvt = data;
-
-	clk_disable_unprepare(pvt->clk);
-}
-
-static int pvt_clk_enable(struct device *dev, struct pvt_device *pvt)
-{
-	int ret;
-
-	ret = clk_prepare_enable(pvt->clk);
-	if (ret)
-		return ret;
-
-	return devm_add_action_or_reset(dev, pvt_clk_disable, pvt);
-}
-
 static void pvt_reset_control_assert(void *data)
 {
 	struct pvt_device *pvt = data;
@@ -799,16 +781,10 @@ static int mr75203_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	pvt->clk = devm_clk_get(dev, NULL);
+	pvt->clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(pvt->clk))
 		return dev_err_probe(dev, PTR_ERR(pvt->clk), "failed to get clock\n");
 
-	ret = pvt_clk_enable(dev, pvt);
-	if (ret) {
-		dev_err(dev, "failed to enable clock\n");
-		return ret;
-	}
-
 	pvt->rst = devm_reset_control_get_optional_exclusive(dev, NULL);
 	if (IS_ERR(pvt->rst))
 		return dev_err_probe(dev, PTR_ERR(pvt->rst),