[PATCH 1/6] pwm: sun4i: enable clk prior to getting its rate

[Roman Beranek]

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 <roman.beranek at prusa3d.com>
---
 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