1 files changed, 27 insertions, 8 deletions

diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 852de6ce6e1..8a5d3ae2946 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -40,7 +40,8 @@
 #define MX3_PWMCR_EN              (1 << 0)
 
 struct imx_chip {
-	struct clk	*clk;
+	struct clk	*clk_per;
+	struct clk	*clk_ipg;
 
 	int		enabled;
 	void __iomem	*mmio_base;
@@ -106,7 +107,7 @@ static int imx_pwm_config_v2(struct pwm_chip *chip,
 	unsigned long period_cycles, duty_cycles, prescale;
 	u32 cr;
 
-	c = clk_get_rate(imx->clk);
+	c = clk_get_rate(imx->clk_per);
 	c = c * period_ns;
 	do_div(c, 1000000000);
 	period_cycles = c;
@@ -161,8 +162,17 @@ static int imx_pwm_config(struct pwm_chip *chip,
 		struct pwm_device *pwm, int duty_ns, int period_ns)
 {
 	struct imx_chip *imx = to_imx_chip(chip);
+	int ret;
+
+	ret = clk_prepare_enable(imx->clk_ipg);
+	if (ret)
+		return ret;
 
-	return imx->config(chip, pwm, duty_ns, period_ns);
+	ret = imx->config(chip, pwm, duty_ns, period_ns);
+
+	clk_disable_unprepare(imx->clk_ipg);
+
+	return ret;
 }
 
 static int imx_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
@@ -170,7 +180,7 @@ static int imx_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 	struct imx_chip *imx = to_imx_chip(chip);
 	int ret;
 
-	ret = clk_prepare_enable(imx->clk);
+	ret = clk_prepare_enable(imx->clk_per);
 	if (ret)
 		return ret;
 
@@ -187,7 +197,7 @@ static void imx_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
 
 	imx->set_enable(chip, false);
 
-	clk_disable_unprepare(imx->clk);
+	clk_disable_unprepare(imx->clk_per);
 	imx->enabled = 0;
 }
 
@@ -239,10 +249,19 @@ static int __devinit imx_pwm_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	imx->clk = devm_clk_get(&pdev->dev, "pwm");
+	imx->clk_per = devm_clk_get(&pdev->dev, "per");
+	if (IS_ERR(imx->clk_per)) {
+		dev_err(&pdev->dev, "getting per clock failed with %ld\n",
+				PTR_ERR(imx->clk_per));
+		return PTR_ERR(imx->clk_per);
+	}
 
-	if (IS_ERR(imx->clk))
-		return PTR_ERR(imx->clk);
+	imx->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
+	if (IS_ERR(imx->clk_ipg)) {
+		dev_err(&pdev->dev, "getting ipg clock failed with %ld\n",
+				PTR_ERR(imx->clk_ipg));
+		return PTR_ERR(imx->clk_ipg);
+	}
 
 	imx->chip.ops = &imx_pwm_ops;
 	imx->chip.dev = &pdev->dev;