diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2020-02-10 22:35:18 +0100 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2020-03-30 16:55:26 +0200 |
| commit | 3ad1f3a33286dc67d595f6fab3a3a9e583bc738a (patch) | |
| tree | e0cbc0017e20028ccb090e9f68ced37aaa2f8655 /include | |
| parent | pwm: imx27: Ensure clocks being on iff the PWM is on (diff) | |
| download | linux-3ad1f3a33286dc67d595f6fab3a3a9e583bc738a.tar.xz linux-3ad1f3a33286dc67d595f6fab3a3a9e583bc738a.zip | |
pwm: Implement some checks for lowlevel drivers
There are some expectations which the callbacks provided by lowlevel
drivers should fulfill. Implement checks that help driver authors to get
these semantics right. As these have some overhead the checks can be
disabled using a Kconfig setting.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pwm.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 0ef808d925bb..2635b2a55090 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -71,7 +71,8 @@ struct pwm_state { * @chip: PWM chip providing this PWM device * @chip_data: chip-private data associated with the PWM device * @args: PWM arguments - * @state: curent PWM channel state + * @state: last applied state + * @last: last implemented state (for PWM_DEBUG) */ struct pwm_device { const char *label; @@ -83,6 +84,7 @@ struct pwm_device { struct pwm_args args; struct pwm_state state; + struct pwm_state last; }; /** |