summaryrefslogtreecommitdiff
path: root/drivers/pwm/pwm-sl28cpld.c
diff options
context:
space:
mode:
authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2022-12-02 21:35:26 +0300
committerThierry Reding <thierry.reding@gmail.com>2022-12-06 14:46:22 +0300
commit6c452cff79f8bf1c0146fda598d32061cfd25443 (patch)
tree92e3f6764dbe2ac56ef84d7c8cf399df3848d834 /drivers/pwm/pwm-sl28cpld.c
parent958f03074980e8ae1b0c257a732fe467069ec267 (diff)
downloadlinux-6c452cff79f8bf1c0146fda598d32061cfd25443.tar.xz
pwm: Make .get_state() callback return an error code
.get_state() might fail in some cases. To make it possible that a driver signals such a failure change the prototype of .get_state() to return an error code. This patch was created using coccinelle and the following semantic patch: @p1@ identifier getstatefunc; identifier driver; @@ struct pwm_ops driver = { ..., .get_state = getstatefunc ,... }; @p2@ identifier p1.getstatefunc; identifier chip, pwm, state; @@ -void +int getstatefunc(struct pwm_chip *chip, struct pwm_device *pwm, struct pwm_state *state) { ... - return; + return 0; ... } plus the actual change of the prototype in include/linux/pwm.h (plus some manual fixing of indentions and empty lines). So for now all drivers return success unconditionally. They are adapted in the following patches to make the changes easier reviewable. Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Acked-by: Douglas Anderson <dianders@chromium.org> Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20221130152148.2769768-2-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm/pwm-sl28cpld.c')
-rw-r--r--drivers/pwm/pwm-sl28cpld.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/pwm/pwm-sl28cpld.c b/drivers/pwm/pwm-sl28cpld.c
index 589aeaaa6ac8..e64900ad4ba1 100644
--- a/drivers/pwm/pwm-sl28cpld.c
+++ b/drivers/pwm/pwm-sl28cpld.c
@@ -87,9 +87,9 @@ struct sl28cpld_pwm {
#define sl28cpld_pwm_from_chip(_chip) \
container_of(_chip, struct sl28cpld_pwm, pwm_chip)
-static void sl28cpld_pwm_get_state(struct pwm_chip *chip,
- struct pwm_device *pwm,
- struct pwm_state *state)
+static int sl28cpld_pwm_get_state(struct pwm_chip *chip,
+ struct pwm_device *pwm,
+ struct pwm_state *state)
{
struct sl28cpld_pwm *priv = sl28cpld_pwm_from_chip(chip);
unsigned int reg;
@@ -115,6 +115,8 @@ static void sl28cpld_pwm_get_state(struct pwm_chip *chip,
* the PWM core.
*/
state->duty_cycle = min(state->duty_cycle, state->period);
+
+ return 0;
}
static int sl28cpld_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,