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| author | Doug Brown <doug@schmorgal.com> | 2022-12-02 19:35:24 +0100 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2022-12-06 12:46:15 +0100 |
| commit | 8ba2725ffac351a1b80063ac7eb362832fae16a2 (patch) | |
| tree | f3c5d14f710b086229b31882cc76531fb7256db5 /drivers/pwm/pwm-pxa.c | |
| parent | 092c2ef4571cbc7e5f466bc241ff054723c41973 (diff) | |
| download | linux-8ba2725ffac351a1b80063ac7eb362832fae16a2.tar.bz2 | |
pwm: pxa: Add reference manual link and limitations
Add a pointer to the location of reference manuals for some of the
supported chips, and add a limitations section explaining the hardware's
PWM disable behavior.
Suggested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Doug Brown <doug@schmorgal.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20221113233639.24244-6-doug@schmorgal.com
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-pxa.c')
| -rw-r--r-- | drivers/pwm/pwm-pxa.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c index 00063ead7c0a..46ed668bd141 100644 --- a/drivers/pwm/pwm-pxa.c +++ b/drivers/pwm/pwm-pxa.c @@ -6,6 +6,13 @@ * * 2008-02-13 initial version * eric miao <eric.miao@marvell.com> + * + * Links to reference manuals for some of the supported PWM chips can be found + * in Documentation/arm/marvell.rst. + * + * Limitations: + * - When PWM is stopped, the current PWM period stops abruptly at the next + * input clock (PWMCR_SD is set) and the output is driven to inactive. */ #include <linux/module.h> |