pwm: Implement some checks for lowlevel drivers

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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>

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Uwe Kleine-König 2020-02-10 22:35:18 +01:00 • committed by Thierry Reding

parent 2cb5cd90f4

commit 3ad1f3a332

3 changed files with 140 additions and 8 deletions

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9

drivers/pwm/Kconfig

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135

drivers/pwm/core.c

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4

include/linux/pwm.h

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