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pwm: jz4740: Document known limitations

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The JZ4740 PWM implementation doesn't fulfill the (up to now
insufficiently documented) requirements of the PWM API. At least
document them in the driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Uwe Kleine-König 2019-07-30 14:32:29 +02:00 committed by Thierry Reding
parent f6abac0379
commit 3b442c60cf
1 changed files with 5 additions and 0 deletions
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5
drivers/pwm/pwm-jz4740.c
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@ -2,6 +2,11 @@
/*
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
* JZ4740 platform PWM support
*
* Limitations:
* - The .apply callback doesn't complete the currently running period before
* reconfiguring the hardware.
* - Each period starts with the inactive part.
*/
#include <linux/clk.h>