diff mbox series

[-next,02/11] gpio: davinci: Use helper function devm_clk_get_enabled()

Message ID 20230818093018.1051434-3-lizetao1@huawei.com (mailing list archive)
State New, archived
Headers show
Series gpio: Use devm_clk_get_*() helper function to simplify the drivers. | expand

Commit Message

Li Zetao Aug. 18, 2023, 9:30 a.m. UTC 
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@huawei.com>
---
 drivers/gpio/gpio-davinci.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

Comments

Andy Shevchenko Aug. 18, 2023, 2:03 p.m. UTC | #1 
On Fri, Aug 18, 2023 at 05:30:09PM +0800, Li Zetao wrote:
> 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.

It seems it fixes a bug that we try to remove the enabled clock on unbinding.
Maybe Tony can shed a light here. If this is the case, add a Fixes tag.
Otherwise it might be (undesired?) functional change and in any case has to
be mentioned in the commit message.
diff mbox series

Patch

diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index 8db5717bdabe..23b5ae8cf2aa 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -477,7 +477,6 @@  static int davinci_gpio_irq_setup(struct platform_device *pdev)
 {
 	unsigned	gpio, bank;
 	int		irq;
-	int		ret;
 	struct clk	*clk;
 	u32		binten = 0;
 	unsigned	ngpio;
@@ -502,21 +501,16 @@  static int davinci_gpio_irq_setup(struct platform_device *pdev)
 
 	ngpio = pdata->ngpio;
 
-	clk = devm_clk_get(dev, "gpio");
+	clk = devm_clk_get_enabled(dev, "gpio");
 	if (IS_ERR(clk)) {
 		dev_err(dev, "Error %ld getting gpio clock\n", PTR_ERR(clk));
 		return PTR_ERR(clk);
 	}
 
-	ret = clk_prepare_enable(clk);
-	if (ret)
-		return ret;
-
 	if (!pdata->gpio_unbanked) {
 		irq = devm_irq_alloc_descs(dev, -1, 0, ngpio, 0);
 		if (irq < 0) {
 			dev_err(dev, "Couldn't allocate IRQ numbers\n");
-			clk_disable_unprepare(clk);
 			return irq;
 		}
 
@@ -525,7 +519,6 @@  static int davinci_gpio_irq_setup(struct platform_device *pdev)
 							chips);
 		if (!irq_domain) {
 			dev_err(dev, "Couldn't register an IRQ domain\n");
-			clk_disable_unprepare(clk);
 			return -ENODEV;
 		}
 	}
@@ -594,10 +587,8 @@  static int davinci_gpio_irq_setup(struct platform_device *pdev)
 				       sizeof(struct
 					      davinci_gpio_irq_data),
 					      GFP_KERNEL);
-		if (!irqdata) {
-			clk_disable_unprepare(clk);
+		if (!irqdata)
 			return -ENOMEM;
-		}
 
 		irqdata->regs = g;
 		irqdata->bank_num = bank;