From 8ba2725ffac351a1b80063ac7eb362832fae16a2 Mon Sep 17 00:00:00 2001 From: Doug Brown Date: Fri, 2 Dec 2022 19:35:24 +0100 Subject: [PATCH] pwm: pxa: Add reference manual link and limitations MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Doug Brown Reviewed-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20221113233639.24244-6-doug@schmorgal.com Signed-off-by: Uwe Kleine-König Signed-off-by: Thierry Reding --- drivers/pwm/pwm-pxa.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c index 00063ea..46ed668 100644 --- a/drivers/pwm/pwm-pxa.c +++ b/drivers/pwm/pwm-pxa.c @@ -6,6 +6,13 @@ * * 2008-02-13 initial version * eric miao + * + * 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 -- 2.7.4