lkml.org 
[lkml]   [2012]   [Aug]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/9] pwm i.MX: remove unnecessary if in pwm_[en|dis]able
Date
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>
---
drivers/pwm/pwm-imx.c | 25 +++++++++++--------------
1 file changed, 11 insertions(+), 14 deletions(-)

diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 38270f4..0f244e6 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;
@@ -138,14 +138,15 @@ 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 rc;

- if (!imx->clk_enabled) {
- rc = clk_prepare_enable(imx->clk);
- if (!rc)
- imx->clk_enabled = 1;
- }
- return rc;
+ rc = clk_prepare_enable(imx->clk);
+ if (rc)
+ return rc;
+
+ imx->enabled = 1;
+
+ return 0;
}

static void imx_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
@@ -154,10 +155,8 @@ 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 = {
@@ -189,8 +188,6 @@ 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");
--
1.7.10.4


\
 
 \ /
  Last update: 2012-08-28 14:21    [W:0.190 / U:0.472 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site