[PATCH 2/2] pwm: xilinx: Simplify using devm functions

[Uwe Kleine-König]

devm_clk_get() + clk_prepare_enable() can be simplified to
devm_clk_get_enabled(). Both clk_rate_exclusive_get() and pwmchip_add()
have devm variants.

This allows to completely drop the remove callback and the error path in
the probe function.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
---
 drivers/pwm/pwm-xilinx.c | 25 ++++++-------------------
 1 file changed, 6 insertions(+), 19 deletions(-)

diff --git a/drivers/pwm/pwm-xilinx.c b/drivers/pwm/pwm-xilinx.c
index 5f3c2a6fed11..19a2a496d555 100644
--- a/drivers/pwm/pwm-xilinx.c
+++ b/drivers/pwm/pwm-xilinx.c
@@ -268,38 +268,26 @@ static int xilinx_pwm_probe(struct platform_device *pdev)
 	 * alas, such properties are not allowed to be used.
 	 */
 
-	priv->clk = devm_clk_get(dev, "s_axi_aclk");
+	priv->clk = devm_clk_get_enabled(dev, "s_axi_aclk");
 	if (IS_ERR(priv->clk))
 		return dev_err_probe(dev, PTR_ERR(priv->clk),
 				     "Could not get clock\n");
 
-	ret = clk_prepare_enable(priv->clk);
+	ret = devm_clk_rate_exclusive_get(dev, priv->clk);
 	if (ret)
-		return dev_err_probe(dev, ret, "Clock enable failed\n");
-	clk_rate_exclusive_get(priv->clk);
+		return dev_err_probe(dev, ret,
+				     "Could not get exclusive control over clock\n");
 
 	xilinx_pwm->chip.dev = dev;
 	xilinx_pwm->chip.ops = &xilinx_pwm_ops;
 	xilinx_pwm->chip.npwm = 1;
-	ret = pwmchip_add(&xilinx_pwm->chip);
-	if (ret) {
-		clk_rate_exclusive_put(priv->clk);
-		clk_disable_unprepare(priv->clk);
+	ret = devm_pwmchip_add(dev, &xilinx_pwm->chip);
+	if (ret)
 		return dev_err_probe(dev, ret, "Could not register PWM chip\n");
-	}
 
 	return 0;
 }
 
-static void xilinx_pwm_remove(struct platform_device *pdev)
-{
-	struct xilinx_pwm_device *xilinx_pwm = platform_get_drvdata(pdev);
-
-	pwmchip_remove(&xilinx_pwm->chip);
-	clk_rate_exclusive_put(xilinx_pwm->priv.clk);
-	clk_disable_unprepare(xilinx_pwm->priv.clk);
-}
-
 static const struct of_device_id xilinx_pwm_of_match[] = {
 	{ .compatible = "xlnx,xps-timer-1.00.a", },
 	{},
@@ -308,7 +296,6 @@ MODULE_DEVICE_TABLE(of, xilinx_pwm_of_match);
 
 static struct platform_driver xilinx_pwm_driver = {
 	.probe = xilinx_pwm_probe,
-	.remove_new = xilinx_pwm_remove,
 	.driver = {
 		.name = "xilinx-pwm",
 		.of_match_table = of_match_ptr(xilinx_pwm_of_match),
-- 
2.42.0