linux-kernel - [PATCH v2] pwm: spear: Fix enable pwm output

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Date:	Sat, 30 Mar 2013 13:37:28 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Thierry Reding <thierry.reding@...onic-design.de>
Cc:	Viresh Kumar <viresh.kumar@...aro.org>,
	Shiraz Hashim <shiraz.hashim@...com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] pwm: spear: Fix enable pwm output

The logic to check return value of clk_enable() is reversed, thus
when clk_enable() passes PWMCR_PWM_ENABLE bit is not set. Fix it.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/pwm/pwm-spear.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pwm/pwm-spear.c b/drivers/pwm/pwm-spear.c
index 69a2d9e..d836940 100644
--- a/drivers/pwm/pwm-spear.c
+++ b/drivers/pwm/pwm-spear.c
@@ -143,7 +143,7 @@ static int spear_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 	u32 val;
 
 	rc = clk_enable(pc->clk);
-	if (!rc)
+	if (rc)
 		return rc;
 
 	val = spear_pwm_readl(pc, pwm->hwpwm, PWMCR);
@@ -214,7 +214,7 @@ static int spear_pwm_probe(struct platform_device *pdev)
 
 	if (of_device_is_compatible(np, "st,spear1340-pwm")) {
 		ret = clk_enable(pc->clk);
-		if (!ret) {
+		if (ret) {
 			clk_unprepare(pc->clk);
 			return ret;
 		}
-- 
1.7.10.4



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