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authorSimon South2021-01-19 11:12:09 -0500
committerThierry Reding2021-01-20 18:13:32 +0100
commit11be938ae003c1cf157f0e80d5c9ad29a0f4c34c (patch)
treee6f28027a57ef125d37ca3658091ebe6eb704d45 /lib/devres.c
parentd21ba5d6217bd5a6a696678385906ed1994b380b (diff)
pwm: rockchip: Enable clock before calling clk_get_rate()
The documentation for clk_get_rate() in include/linux/clk.h states the function's result is valid only for a clock source that has been enabled. However, the Rockchip PWM driver uses this function in two places to query the rate of a clock without first ensuring it is enabled. Fix this by modifying rockchip_pwm_get_state() and rockchip_pwm_apply() so they enable a device's PWM clock before querying its rate (in the latter case, the querying is actually done in rockchip_pwm_config()) and disable the clock again before returning. Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Simon South <simon@simonsouth.net> Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'lib/devres.c')
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