| Message ID | 20230824135514.2661364-3-ruanjinjie@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | watchdog: Use the devm_clk_get_enabled() helper function | expand |
On Thu, Aug 24, 2023 at 09:55:13PM +0800, Jinjie Ruan wrote: > The devm_clk_get_enabled() helper: > - calls devm_clk_get() > - calls clk_prepare_enable() and registers what is needed in order to > call clk_disable_unprepare() when needed, as a managed resource. > > This simplifies the code. > > Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > drivers/watchdog/ath79_wdt.c | 19 ++++--------------- > 1 file changed, 4 insertions(+), 15 deletions(-) > > diff --git a/drivers/watchdog/ath79_wdt.c b/drivers/watchdog/ath79_wdt.c > index b7b705060438..e5cc30622b12 100644 > --- a/drivers/watchdog/ath79_wdt.c > +++ b/drivers/watchdog/ath79_wdt.c > @@ -257,19 +257,13 @@ static int ath79_wdt_probe(struct platform_device *pdev) > if (IS_ERR(wdt_base)) > return PTR_ERR(wdt_base); > > - wdt_clk = devm_clk_get(&pdev->dev, "wdt"); > + wdt_clk = devm_clk_get_enabled(&pdev->dev, "wdt"); > if (IS_ERR(wdt_clk)) > return PTR_ERR(wdt_clk); > > - err = clk_prepare_enable(wdt_clk); > - if (err) > - return err; > - > wdt_freq = clk_get_rate(wdt_clk); > - if (!wdt_freq) { > - err = -EINVAL; > - goto err_clk_disable; > - } > + if (!wdt_freq) > + return -EINVAL; > > max_timeout = (0xfffffffful / wdt_freq); > if (timeout < 1 || timeout > max_timeout) { > @@ -286,20 +280,15 @@ static int ath79_wdt_probe(struct platform_device *pdev) > if (err) { > dev_err(&pdev->dev, > "unable to register misc device, err=%d\n", err); > - goto err_clk_disable; > + return err; > } > > return 0; > - > -err_clk_disable: > - clk_disable_unprepare(wdt_clk); > - return err; > } > > static void ath79_wdt_remove(struct platform_device *pdev) > { > misc_deregister(&ath79_wdt_miscdev); > - clk_disable_unprepare(wdt_clk); > } > > static void ath79_wdt_shutdown(struct platform_device *pdev) > -- > 2.34.1 >
diff --git a/drivers/watchdog/ath79_wdt.c b/drivers/watchdog/ath79_wdt.c index b7b705060438..e5cc30622b12 100644 --- a/drivers/watchdog/ath79_wdt.c +++ b/drivers/watchdog/ath79_wdt.c @@ -257,19 +257,13 @@ static int ath79_wdt_probe(struct platform_device *pdev) if (IS_ERR(wdt_base)) return PTR_ERR(wdt_base); - wdt_clk = devm_clk_get(&pdev->dev, "wdt"); + wdt_clk = devm_clk_get_enabled(&pdev->dev, "wdt"); if (IS_ERR(wdt_clk)) return PTR_ERR(wdt_clk); - err = clk_prepare_enable(wdt_clk); - if (err) - return err; - wdt_freq = clk_get_rate(wdt_clk); - if (!wdt_freq) { - err = -EINVAL; - goto err_clk_disable; - } + if (!wdt_freq) + return -EINVAL; max_timeout = (0xfffffffful / wdt_freq); if (timeout < 1 || timeout > max_timeout) { @@ -286,20 +280,15 @@ static int ath79_wdt_probe(struct platform_device *pdev) if (err) { dev_err(&pdev->dev, "unable to register misc device, err=%d\n", err); - goto err_clk_disable; + return err; } return 0; - -err_clk_disable: - clk_disable_unprepare(wdt_clk); - return err; } static void ath79_wdt_remove(struct platform_device *pdev) { misc_deregister(&ath79_wdt_miscdev); - clk_disable_unprepare(wdt_clk); } static void ath79_wdt_shutdown(struct platform_device *pdev)
The devm_clk_get_enabled() helper: - calls devm_clk_get() - calls clk_prepare_enable() and registers what is needed in order to call clk_disable_unprepare() when needed, as a managed resource. This simplifies the code. Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com> --- drivers/watchdog/ath79_wdt.c | 19 ++++--------------- 1 file changed, 4 insertions(+), 15 deletions(-)