linux-kernel - [PATCH] gpio: ftgpio010: shrink code

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Message-ID: <20241017123044.75531-1-brgl@bgdev.pl>
Date: Thu, 17 Oct 2024 14:30:44 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH] gpio: ftgpio010: shrink code

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Use devm_clk_get_enabled() to drop the goto label from probe() and the
entire remove() callback. Drop platform_set_drvdata() as it's no longer
needed. Drop log noise on success.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/gpio/gpio-ftgpio010.c | 45 +++++++----------------------------
 1 file changed, 9 insertions(+), 36 deletions(-)

diff --git a/drivers/gpio/gpio-ftgpio010.c b/drivers/gpio/gpio-ftgpio010.c
index 5b07749dbdff..c35eaa2851d8 100644
--- a/drivers/gpio/gpio-ftgpio010.c
+++ b/drivers/gpio/gpio-ftgpio010.c
@@ -253,18 +253,13 @@ static int ftgpio_gpio_probe(struct platform_device *pdev)
 	if (irq < 0)
 		return irq;
 
-	g->clk = devm_clk_get(dev, NULL);
-	if (!IS_ERR(g->clk)) {
-		ret = clk_prepare_enable(g->clk);
-		if (ret)
-			return ret;
-	} else if (PTR_ERR(g->clk) == -EPROBE_DEFER) {
+	g->clk = devm_clk_get_enabled(dev, NULL);
+	if (IS_ERR(g->clk) && PTR_ERR(g->clk) == -EPROBE_DEFER)
 		/*
 		 * Percolate deferrals, for anything else,
 		 * just live without the clocking.
 		 */
 		return PTR_ERR(g->clk);
-	}
 
 	ret = bgpio_init(&g->gc, dev, 4,
 			 g->base + GPIO_DATA_IN,
@@ -273,10 +268,9 @@ static int ftgpio_gpio_probe(struct platform_device *pdev)
 			 g->base + GPIO_DIR,
 			 NULL,
 			 0);
-	if (ret) {
-		dev_err(dev, "unable to init generic GPIO\n");
-		goto dis_clk;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "unable to init generic GPIO\n");
+
 	g->gc.label = dev_name(dev);
 	g->gc.base = -1;
 	g->gc.parent = dev;
@@ -293,10 +287,9 @@ static int ftgpio_gpio_probe(struct platform_device *pdev)
 	girq->num_parents = 1;
 	girq->parents = devm_kcalloc(dev, 1, sizeof(*girq->parents),
 				     GFP_KERNEL);
-	if (!girq->parents) {
-		ret = -ENOMEM;
-		goto dis_clk;
-	}
+	if (!girq->parents)
+		return -ENOMEM;
+
 	girq->default_type = IRQ_TYPE_NONE;
 	girq->handler = handle_bad_irq;
 	girq->parents[0] = irq;
@@ -309,26 +302,7 @@ static int ftgpio_gpio_probe(struct platform_device *pdev)
 	/* Clear any use of debounce */
 	writel(0x0, g->base + GPIO_DEBOUNCE_EN);
 
-	ret = devm_gpiochip_add_data(dev, &g->gc, g);
-	if (ret)
-		goto dis_clk;
-
-	platform_set_drvdata(pdev, g);
-	dev_info(dev, "FTGPIO010 @%p registered\n", g->base);
-
-	return 0;
-
-dis_clk:
-	clk_disable_unprepare(g->clk);
-
-	return ret;
-}
-
-static void ftgpio_gpio_remove(struct platform_device *pdev)
-{
-	struct ftgpio_gpio *g = platform_get_drvdata(pdev);
-
-	clk_disable_unprepare(g->clk);
+	return devm_gpiochip_add_data(dev, &g->gc, g);
 }
 
 static const struct of_device_id ftgpio_gpio_of_match[] = {
@@ -350,6 +324,5 @@ static struct platform_driver ftgpio_gpio_driver = {
 		.of_match_table = ftgpio_gpio_of_match,
 	},
 	.probe = ftgpio_gpio_probe,
-	.remove = ftgpio_gpio_remove,
 };
 builtin_platform_driver(ftgpio_gpio_driver);
-- 
2.43.0