linux-kernel - [PATCH 1/4] pinctrl: samsung: defer pinctrl

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Message-ID: <20231006125557.212681-2-m.majewski2@samsung.com>
Date:   Fri,  6 Oct 2023 14:55:54 +0200
From:   Mateusz Majewski <m.majewski2@...sung.com>
To:     linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Mateusz Majewski <m.majewski2@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: [PATCH 1/4] pinctrl: samsung: defer pinctrl_enable

dev_pinctrl_register function immediately enables the pinctrl subsystem,
which is unpreferable in general, since drivers might be unable to
handle calls immediately. Hence devm_pinctrl_register_and_init, which
does not call pinctrl_enable, is preferred.

In case of our driver using the old function does not seem to be
problematic for now, but will become an issue when we postpone parts of
pinctrl initialization in a future commit, and it is a good idea to move
off a deprecated-ish function anyway.

Signed-off-by: Mateusz Majewski <m.majewski2@...sung.com>
---
 drivers/pinctrl/samsung/pinctrl-samsung.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c
index e54847040b4a..e496af72a587 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.c
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.c
@@ -904,11 +904,11 @@ static int samsung_pinctrl_register(struct platform_device *pdev,
 	if (ret)
 		return ret;
 
-	drvdata->pctl_dev = devm_pinctrl_register(&pdev->dev, ctrldesc,
-						  drvdata);
-	if (IS_ERR(drvdata->pctl_dev)) {
+	ret = devm_pinctrl_register_and_init(&pdev->dev, ctrldesc, drvdata,
+					     &drvdata->pctl_dev);
+	if (ret) {
 		dev_err(&pdev->dev, "could not register pinctrl driver\n");
-		return PTR_ERR(drvdata->pctl_dev);
+		return ret;
 	}
 
 	for (bank = 0; bank < drvdata->nr_banks; ++bank) {
@@ -1176,6 +1176,10 @@ static int samsung_pinctrl_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_unregister;
 
+	ret = pinctrl_enable(drvdata->pctl_dev);
+	if (ret)
+		goto err_unregister;
+
 	platform_set_drvdata(pdev, drvdata);
 
 	return 0;
-- 
2.42.0