[PATCH 1/6] pwm: sun4i: enable clk prior to getting its rate
From: Roman Beranek <hidden>
Date: 2021-05-31 04:47:48
Also in:
linux-pwm, linux-sunxi
Subsystem:
pwm subsystem, the rest · Maintainers:
Uwe Kleine-König, Linus Torvalds
Ensure the PWM clock is enabled prior to retrieving its rate, as is already being done in sun4i_pwm_apply. Signed-off-by: Roman Beranek <redacted> --- drivers/pwm/pwm-sun4i.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
index e01becd102c0..3721b9894cf6 100644
--- a/drivers/pwm/pwm-sun4i.c
+++ b/drivers/pwm/pwm-sun4i.c@@ -117,8 +117,15 @@ static void sun4i_pwm_get_state(struct pwm_chip *chip, u64 clk_rate, tmp; u32 val; unsigned int prescaler; + int ret; + ret = clk_prepare_enable(sun4i_pwm->clk); + if (ret) { + dev_err(chip->dev, "failed to enable PWM clock\n"); + return; + } clk_rate = clk_get_rate(sun4i_pwm->clk); + clk_disable_unprepare(sun4i_pwm->clk); val = sun4i_pwm_readl(sun4i_pwm, PWM_CTRL_REG);
--
2.31.1
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