From bd6c9a9a8a7e1cbd5edee29a5a32ea7b29228637 Mon Sep 17 00:00:00 2001
From: Philipp Zabel <p.zabel@pengutronix.de>
Date: Mon, 25 Jun 2012 16:15:20 +0200
Subject: [PATCH] --- yaml --- r: 333097 b: refs/heads/master c:
 7b27c160c68152581c702b9f1fe362338d2a0cad h: refs/heads/master i:   333095:
 50b6d346908f944a78aae03efd1552a6a51af87c v: v3

---
 [refs]                      |  2 +-
 trunk/drivers/pwm/pwm-imx.c | 35 +++++++++++++++++++++++++++--------
 2 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/[refs] b/[refs]
index 472f23701364..a6b931cffae0 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8d1c24bfd20829f5943c76b85c4973db264dd666
+refs/heads/master: 7b27c160c68152581c702b9f1fe362338d2a0cad
diff --git a/trunk/drivers/pwm/pwm-imx.c b/trunk/drivers/pwm/pwm-imx.c
index 852de6ce6e11..8a5d3ae2946a 100644
--- a/trunk/drivers/pwm/pwm-imx.c
+++ b/trunk/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;