hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Sascha Hauer 2012-08-28 09:12:01 +02:00 committed by Thierry Reding
parent 19e7333323
commit 140827c148
1 changed files with 11 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/pwm/pwm-imx.c
View File

@ -42,7 +42,7 @@
struct imx_chip { struct imx_chip {
struct clk *clk; struct clk *clk;
int clk_enabled; int enabled;
void __iomem *mmio_base; void __iomem *mmio_base;
struct pwm_chip chip; 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) static int imx_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{ {
struct imx_chip *imx = to_imx_chip(chip); struct imx_chip *imx = to_imx_chip(chip);
int rc = 0; int ret;
if (!imx->clk_enabled) { ret = clk_prepare_enable(imx->clk);
rc = clk_prepare_enable(imx->clk); if (ret)
if (!rc) return ret;
imx->clk_enabled = 1;
} imx->enabled = 1;
return rc;
return 0;
} }
static void imx_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) 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); writel(0, imx->mmio_base + MX3_PWMCR);
if (imx->clk_enabled) { clk_disable_unprepare(imx->clk);
clk_disable_unprepare(imx->clk); imx->enabled = 0;
imx->clk_enabled = 0;
}
} }
static struct pwm_ops imx_pwm_ops = { 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.base = -1;
imx->chip.npwm = 1; imx->chip.npwm = 1;
imx->clk_enabled = 0;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0); r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL) { if (r == NULL) {
dev_err(&pdev->dev, "no memory resource defined\n"); dev_err(&pdev->dev, "no memory resource defined\n");