| Message ID | 20190525181133.4875-3-martin.blumenstingl@googlemail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | pwm-meson: cleanups and improvements | expand |
On 25/05/2019 20:11, 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> > --- > drivers/pwm/pwm-meson.c | 11 +++-------- > 1 file changed, 3 insertions(+), 8 deletions(-) > > 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; > Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
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;
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> --- drivers/pwm/pwm-meson.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-)