[PATCH -next 03/11] gpio: ftgpio010: Use helper function devm_clk_get_enabled()

[Li Zetao]

Since commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for
prepared and enabled clocks"), devm_clk_get() and clk_prepare_enable()
can now be replaced by devm_clk_get_enabled() when the driver enables
(and possibly prepares) the clocks for the whole lifetime of the device.
Moreover, it is no longer necessary to unprepare and disable the clocks
explicitly.

Signed-off-by: Li Zetao <lizetao1 at huawei.com>
---
 drivers/gpio/gpio-ftgpio010.c | 29 +++++++----------------------
 1 file changed, 7 insertions(+), 22 deletions(-)

diff --git a/drivers/gpio/gpio-ftgpio010.c b/drivers/gpio/gpio-ftgpio010.c
index 5ce59dcf02e3..51724adf237a 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 (PTR_ERR_OR_ZERO(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,
@@ -275,7 +270,7 @@ static int ftgpio_gpio_probe(struct platform_device *pdev)
 			 0);
 	if (ret) {
 		dev_err(dev, "unable to init generic GPIO\n");
-		goto dis_clk;
+		return ret;
 	}
 	g->gc.label = dev_name(dev);
 	g->gc.base = -1;
@@ -293,10 +288,9 @@ 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;
@@ -311,25 +305,16 @@ static int ftgpio_gpio_probe(struct platform_device *pdev)
 
 	ret = devm_gpiochip_add_data(dev, &g->gc, g);
 	if (ret)
-		goto dis_clk;
+		return ret;
 
 	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 int ftgpio_gpio_remove(struct platform_device *pdev)
 {
-	struct ftgpio_gpio *g = platform_get_drvdata(pdev);
-
-	clk_disable_unprepare(g->clk);
-
 	return 0;
 }
 
-- 
2.34.1