gpio: mb86s7x: Use helper function devm_clk_get_optional_enabled()

devm_clk_get_optional() and clk_prepare_enable() can be replaced by helper
function devm_clk_get_optional_enabled(). Let's simplify code with use of
devm_clk_get_optional_enabled() and avoid calling clk_disable_unprepare().
Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Link: https://lore.kernel.org/r/20240904092311.9544-4-zhangzekun11@huawei.comSigned-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/gpio-mb86s7x.c

@@ -35,7 +35,6 @@
 struct mb86s70_gpio_chip {
 	struct gpio_chip gc;
 	void __iomem *base;
-	struct clk *clk;
 	spinlock_t lock;
 };
 
@@ -157,6 +156,7 @@ static int mb86s70_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
 static int mb86s70_gpio_probe(struct platform_device *pdev)
 {
 	struct mb86s70_gpio_chip *gchip;
+	struct clk *clk;
 	int ret;
 
 	gchip = devm_kzalloc(&pdev->dev, sizeof(*gchip), GFP_KERNEL);
@@ -169,13 +169,9 @@ static int mb86s70_gpio_probe(struct platform_device *pdev)
 	if (IS_ERR(gchip->base))
 		return PTR_ERR(gchip->base);
 
-	gchip->clk = devm_clk_get_optional(&pdev->dev, NULL);
-	if (IS_ERR(gchip->clk))
-		return PTR_ERR(gchip->clk);
-
-	ret = clk_prepare_enable(gchip->clk);
-	if (ret)
-		return ret;
+	clk = devm_clk_get_optional_enabled(&pdev->dev, NULL);
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
 
 	spin_lock_init(&gchip->lock);
 
@@ -193,11 +189,9 @@ static int mb86s70_gpio_probe(struct platform_device *pdev)
 	gchip->gc.base = -1;
 
 	ret = gpiochip_add_data(&gchip->gc, gchip);
-	if (ret) {
-		dev_err(&pdev->dev, "couldn't register gpio driver\n");
-		clk_disable_unprepare(gchip->clk);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "couldn't register gpio driver\n");
 
 	acpi_gpiochip_request_interrupts(&gchip->gc);
 
@@ -210,7 +204,6 @@ static void mb86s70_gpio_remove(struct platform_device *pdev)
 
 	acpi_gpiochip_free_interrupts(&gchip->gc);
 	gpiochip_remove(&gchip->gc);
-	clk_disable_unprepare(gchip->clk);
 }
 
 static const struct of_device_id mb86s70_gpio_dt_ids[] = {