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| 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 /drivers/pwm/Kconfig | |
| parent | 2cb5cd90f4cd3f819178bb47f3d1ef86ce612db7 (diff) | |
| download | lwn-3ad1f3a33286dc67d595f6fab3a3a9e583bc738a.tar.gz lwn-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 'drivers/pwm/Kconfig')
| -rw-r--r-- | drivers/pwm/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index 30190beeb6e9..e21834f44a29 100644 --- a/drivers/pwm/Kconfig +++ b/drivers/pwm/Kconfig @@ -33,6 +33,15 @@ config PWM_SYSFS bool default y if SYSFS +config PWM_DEBUG + bool "PWM lowlevel drivers additional checks and debug messages" + depends on DEBUG_KERNEL + help + This option enables some additional checks to help lowlevel driver + authors to get their callbacks implemented correctly. + It is expected to introduce some runtime overhead and diagnostic + output to the kernel log, so only enable while working on a driver. + config PWM_AB8500 tristate "AB8500 PWM support" depends on AB8500_CORE && ARCH_U8500 |