linux-kernel - [PATCH] pinctrl: renesas: rzg2l: Use devm_clk_get

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Date:   Sat, 22 Jul 2023 22:41:56 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-renesas-soc@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: [PATCH] pinctrl: renesas: rzg2l: Use devm_clk_get_enabled() helper

The devm_clk_get_enabled() helper:
   - calls devm_clk_get()
   - calls clk_prepare_enable() and registers what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code and avoids the need of a dedicated function used
with devm_add_action_or_reset().

While at it, use dev_err_probe() which filters -EPROBE_DEFER.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/pinctrl/renesas/pinctrl-rzg2l.c | 30 ++++---------------------
 1 file changed, 4 insertions(+), 26 deletions(-)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 2f1a08210fd6..b2d05cfe5d8c 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -1471,11 +1471,6 @@ static int rzg2l_pinctrl_register(struct rzg2l_pinctrl *pctrl)
 	return 0;
 }
 
-static void rzg2l_pinctrl_clk_disable(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int rzg2l_pinctrl_probe(struct platform_device *pdev)
 {
 	struct rzg2l_pinctrl *pctrl;
@@ -1501,33 +1496,16 @@ static int rzg2l_pinctrl_probe(struct platform_device *pdev)
 	if (IS_ERR(pctrl->base))
 		return PTR_ERR(pctrl->base);
 
-	pctrl->clk = devm_clk_get(pctrl->dev, NULL);
-	if (IS_ERR(pctrl->clk)) {
-		ret = PTR_ERR(pctrl->clk);
-		dev_err(pctrl->dev, "failed to get GPIO clk : %i\n", ret);
-		return ret;
-	}
+	pctrl->clk = devm_clk_get_enabled(pctrl->dev, NULL);
+	if (IS_ERR(pctrl->clk))
+		return dev_err_probe(pctrl->dev, PTR_ERR(pctrl->clk),
+				     "failed to get GPIO clk\n");
 
 	spin_lock_init(&pctrl->lock);
 	spin_lock_init(&pctrl->bitmap_lock);
 
 	platform_set_drvdata(pdev, pctrl);
 
-	ret = clk_prepare_enable(pctrl->clk);
-	if (ret) {
-		dev_err(pctrl->dev, "failed to enable GPIO clk: %i\n", ret);
-		return ret;
-	}
-
-	ret = devm_add_action_or_reset(&pdev->dev, rzg2l_pinctrl_clk_disable,
-				       pctrl->clk);
-	if (ret) {
-		dev_err(pctrl->dev,
-			"failed to register GPIO clk disable action, %i\n",
-			ret);
-		return ret;
-	}
-
 	ret = rzg2l_pinctrl_register(pctrl);
 	if (ret)
 		return ret;
-- 
2.34.1