diff mbox series

[v2,02/14] pwm: meson: use devm_clk_get_optional() to get the input clock

Message ID 20190608180626.30589-3-martin.blumenstingl@googlemail.com (mailing list archive)
State Superseded
Headers show
Series pwm-meson: cleanups and improvements | expand

Commit Message

Martin Blumenstingl June 8, 2019, 6:06 p.m. UTC 
Simplify the code which fetches the input clock for a PWM channel by
using devm_clk_get_optional().
This comes with a small functional change: previously all errors except
EPROBE_DEFER were ignored. Now all other errors are also treated as
errors. If no input clock is present devm_clk_get_optional() will return
NULL instead of an error which matches the behavior of the old code.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/pwm/pwm-meson.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

Comments

Uwe Kleine-König June 11, 2019, 3:37 p.m. UTC | #1 
On Sat, Jun 08, 2019 at 08:06:14PM +0200, Martin Blumenstingl wrote:
> Simplify the code which fetches the input clock for a PWM channel by
> using devm_clk_get_optional().
> This comes with a small functional change: previously all errors except
> EPROBE_DEFER were ignored. Now all other errors are also treated as
> errors. If no input clock is present devm_clk_get_optional() will return
> NULL instead of an error which matches the behavior of the old code.
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>

Nitpick: Put your S-o-b last. Otherwise this ends as

	Sgned-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
	Rviewed-by: Neil Armstrong <narmstrong@baylibre.com>
	Sgned-off-by: Thierry Reding <thierry.reding@gmail.com>

and this implies that Thierry added Neil's tag.  (Typos are done on
purpose to not confuse patchwork.)

Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Best regards
Uwe
diff mbox series

Patch

diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
index 3fbbc4128ce8..35b38c7201c3 100644
--- a/drivers/pwm/pwm-meson.c
+++ b/drivers/pwm/pwm-meson.c
@@ -474,14 +474,9 @@  static int meson_pwm_init_channels(struct meson_pwm *meson,
 
 		snprintf(name, sizeof(name), "clkin%u", i);
 
-		channel->clk_parent = devm_clk_get(dev, name);
-		if (IS_ERR(channel->clk_parent)) {
-			err = PTR_ERR(channel->clk_parent);
-			if (err == -EPROBE_DEFER)
-				return err;
-
-			channel->clk_parent = NULL;
-		}
+		channel->clk_parent = devm_clk_get_optional(dev, name);
+		if (IS_ERR(channel->clk_parent))
+			return PTR_ERR(channel->clk_parent);
 	}
 
 	return 0;