[PATCH 04/11] pwm: imx-tpm: Simplify using devm functions

[Uwe Kleine-König]

With devm_clk_get_enabled() the call to clk_disable_unprepare() can be
dropped from the error path and the remove callback. With
devm_pwmchip_add() pwmchip_remove() can be dropped. Then the remove
callback is empty and can go away, too.

Also use dev_err_probe() for simplified (and improved) error reporting.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
---
 drivers/pwm/pwm-imx-tpm.c | 29 +++++------------------------
 1 file changed, 5 insertions(+), 24 deletions(-)

diff --git a/drivers/pwm/pwm-imx-tpm.c b/drivers/pwm/pwm-imx-tpm.c
index 98ab65c89685..3ffc89b4f3fe 100644
--- a/drivers/pwm/pwm-imx-tpm.c
+++ b/drivers/pwm/pwm-imx-tpm.c
@@ -351,18 +351,11 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev)
 	if (IS_ERR(tpm->base))
 		return PTR_ERR(tpm->base);
 
-	tpm->clk = devm_clk_get(&pdev->dev, NULL);
+	tpm->clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(tpm->clk))
 		return dev_err_probe(&pdev->dev, PTR_ERR(tpm->clk),
 				     "failed to get PWM clock\n");
 
-	ret = clk_prepare_enable(tpm->clk);
-	if (ret) {
-		dev_err(&pdev->dev,
-			"failed to prepare or enable clock: %d\n", ret);
-		return ret;
-	}
-
 	tpm->chip.dev = &pdev->dev;
 	tpm->chip.ops = &imx_tpm_pwm_ops;
 
@@ -372,22 +365,11 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev)
 
 	mutex_init(&tpm->lock);
 
-	ret = pwmchip_add(&tpm->chip);
-	if (ret) {
-		dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret);
-		clk_disable_unprepare(tpm->clk);
-	}
+	ret = devm_pwmchip_add(&pdev->dev, &tpm->chip);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to add PWM chip\n");
 
-	return ret;
-}
-
-static void pwm_imx_tpm_remove(struct platform_device *pdev)
-{
-	struct imx_tpm_pwm_chip *tpm = platform_get_drvdata(pdev);
-
-	pwmchip_remove(&tpm->chip);
-
-	clk_disable_unprepare(tpm->clk);
+	return 0;
 }
 
 static int __maybe_unused pwm_imx_tpm_suspend(struct device *dev)
@@ -437,7 +419,6 @@ static struct platform_driver imx_tpm_pwm_driver = {
 		.pm = &imx_tpm_pwm_pm,
 	},
 	.probe	= pwm_imx_tpm_probe,
-	.remove_new = pwm_imx_tpm_remove,
 };
 module_platform_driver(imx_tpm_pwm_driver);
 
-- 
2.40.1