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path: root/drivers/pwm/pwm-tegra.c
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Diffstat (limited to 'drivers/pwm/pwm-tegra.c')
-rw-r--r--drivers/pwm/pwm-tegra.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c
index c040f87ee144..8c6ed556db28 100644
--- a/drivers/pwm/pwm-tegra.c
+++ b/drivers/pwm/pwm-tegra.c
@@ -50,6 +50,8 @@ struct tegra_pwm_chip {
struct clk *clk;
struct reset_control*rst;
+ unsigned long clk_rate;
+
void __iomem *regs;
const struct tegra_pwm_soc *soc;
@@ -94,7 +96,7 @@ static int tegra_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
* Compute the prescaler value for which (1 << PWM_DUTY_WIDTH)
* cycles at the PWM clock rate will take period_ns nanoseconds.
*/
- rate = clk_get_rate(pc->clk) >> PWM_DUTY_WIDTH;
+ rate = pc->clk_rate >> PWM_DUTY_WIDTH;
/* Consider precision in PWM_SCALE_WIDTH rate calculation */
hz = DIV_ROUND_CLOSEST_ULL(100ULL * NSEC_PER_SEC, period_ns);
@@ -199,6 +201,9 @@ static int tegra_pwm_probe(struct platform_device *pdev)
if (IS_ERR(pwm->clk))
return PTR_ERR(pwm->clk);
+ /* Read PWM clock rate from source */
+ pwm->clk_rate = clk_get_rate(pwm->clk);
+
pwm->rst = devm_reset_control_get(&pdev->dev, "pwm");
if (IS_ERR(pwm->rst)) {
ret = PTR_ERR(pwm->rst);