| Message ID | f9a4dcfc6d31bd9c1417e2d97a40cc2c1dbc6f30.1672496405.git.christophe.jaillet@wanadoo.fr (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | watchdog: pic32-dmt: Use devm_clk_get_enabled() helper | expand |
On Sat, Dec 31, 2022 at 03:20:29PM +0100, Christophe JAILLET 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 and avoids the need of a dedicated function used > with devm_add_action_or_reset(). > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > drivers/watchdog/pic32-dmt.c | 15 +-------------- > 1 file changed, 1 insertion(+), 14 deletions(-) > > diff --git a/drivers/watchdog/pic32-dmt.c b/drivers/watchdog/pic32-dmt.c > index f43062b3c4c8..bc4ccddc75a3 100644 > --- a/drivers/watchdog/pic32-dmt.c > +++ b/drivers/watchdog/pic32-dmt.c > @@ -164,11 +164,6 @@ static struct watchdog_device pic32_dmt_wdd = { > .ops = &pic32_dmt_fops, > }; > > -static void pic32_clk_disable_unprepare(void *data) > -{ > - clk_disable_unprepare(data); > -} > - > static int pic32_dmt_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > @@ -184,20 +179,12 @@ static int pic32_dmt_probe(struct platform_device *pdev) > if (IS_ERR(dmt->regs)) > return PTR_ERR(dmt->regs); > > - dmt->clk = devm_clk_get(dev, NULL); > + dmt->clk = devm_clk_get_enabled(dev, NULL); > if (IS_ERR(dmt->clk)) { > dev_err(dev, "clk not found\n"); > return PTR_ERR(dmt->clk); > } > > - ret = clk_prepare_enable(dmt->clk); > - if (ret) > - return ret; > - ret = devm_add_action_or_reset(dev, pic32_clk_disable_unprepare, > - dmt->clk); > - if (ret) > - return ret; > - > wdd->timeout = pic32_dmt_get_timeout_secs(dmt); > if (!wdd->timeout) { > dev_err(dev, "failed to read watchdog register timeout\n"); > -- > 2.34.1 >
diff --git a/drivers/watchdog/pic32-dmt.c b/drivers/watchdog/pic32-dmt.c index f43062b3c4c8..bc4ccddc75a3 100644 --- a/drivers/watchdog/pic32-dmt.c +++ b/drivers/watchdog/pic32-dmt.c @@ -164,11 +164,6 @@ static struct watchdog_device pic32_dmt_wdd = { .ops = &pic32_dmt_fops, }; -static void pic32_clk_disable_unprepare(void *data) -{ - clk_disable_unprepare(data); -} - static int pic32_dmt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -184,20 +179,12 @@ static int pic32_dmt_probe(struct platform_device *pdev) if (IS_ERR(dmt->regs)) return PTR_ERR(dmt->regs); - dmt->clk = devm_clk_get(dev, NULL); + dmt->clk = devm_clk_get_enabled(dev, NULL); if (IS_ERR(dmt->clk)) { dev_err(dev, "clk not found\n"); return PTR_ERR(dmt->clk); } - ret = clk_prepare_enable(dmt->clk); - if (ret) - return ret; - ret = devm_add_action_or_reset(dev, pic32_clk_disable_unprepare, - dmt->clk); - if (ret) - return ret; - wdd->timeout = pic32_dmt_get_timeout_secs(dmt); if (!wdd->timeout) { dev_err(dev, "failed to read watchdog register timeout\n");
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 and avoids the need of a dedicated function used with devm_add_action_or_reset(). Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> --- drivers/watchdog/pic32-dmt.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-)