pwm: i.MX: remove unnecessary if in pwm_[en|dis]able

The PWM core makes sure that pwm_enable/disable are called only
once. Still keep the enabled state since we will need it in
pwm_config.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

1 files changed, 11 insertions, 14 deletions

diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 8b7f01e0a100..5d426ffe6a31 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -42,7 +42,7 @@
 struct imx_chip {
         struct clk      *clk;
 
-        int             clk_enabled;
+        int             enabled;
         void __iomem    *mmio_base;
 
         struct pwm_chip chip;
@@ -139,14 +139,15 @@ static int imx_pwm_config(struct pwm_chip *chip,
 static int imx_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 {
         struct imx_chip *imx = to_imx_chip(chip);
-        int rc = 0;
+        int ret;
 
-        if (!imx->clk_enabled) {
-                rc = clk_prepare_enable(imx->clk);
-                if (!rc)
-                        imx->clk_enabled = 1;
-        }
-        return rc;
+        ret = clk_prepare_enable(imx->clk);
+        if (ret)
+                return ret;
+
+        imx->enabled = 1;
+
+        return 0;
 }
 
 static void imx_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
@@ -155,10 +156,8 @@ static void imx_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
 
         writel(0, imx->mmio_base + MX3_PWMCR);
 
-        if (imx->clk_enabled) {
-                clk_disable_unprepare(imx->clk);
-                imx->clk_enabled = 0;
-        }
+        clk_disable_unprepare(imx->clk);
+        imx->enabled = 0;
 }
 
 static struct pwm_ops imx_pwm_ops = {
@@ -190,8 +189,6 @@ static int __devinit imx_pwm_probe(struct platform_device *pdev)
         imx->chip.base = -1;
         imx->chip.npwm = 1;
 
-        imx->clk_enabled = 0;
-
         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (r == NULL) {
                 dev_err(&pdev->dev, "no memory resource defined\n");