linux-kernel - [PATCH 2/3] pwm: lpc32xx - Properly disable the clock on device remove

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Message-Id: <1352894295-14339-3-git-send-email-alban.bedel@avionic-design.de>
Date:	Wed, 14 Nov 2012 12:58:14 +0100
From:	Alban Bedel <alban.bedel@...onic-design.de>
To:	Thierry Reding <thierry.reding@...onic-design.de>
Cc:	linux-kernel@...r.kernel.org, Roland Stigge <stigge@...com.de>,
	Alexandre Pereira da Silva <aletes.xgr@...il.com>,
	Alban Bedel <alban.bedel@...onic-design.de>
Subject: [PATCH 2/3] pwm: lpc32xx - Properly disable the clock on device remove

A single clock is used for all PWMs meaning the clock ref count might
be between 0 and N when remove() is called. Instead of a single
clk_disable() call pwm_disable() on each PWM, that ensure that
clk_disable() is called for each PWM that were still enabled.

Signed-off-by: Alban Bedel <alban.bedel@...onic-design.de>
---
 drivers/pwm/pwm-lpc32xx.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/pwm/pwm-lpc32xx.c b/drivers/pwm/pwm-lpc32xx.c
index 03ec3ff..f45ce2c 100644
--- a/drivers/pwm/pwm-lpc32xx.c
+++ b/drivers/pwm/pwm-lpc32xx.c
@@ -136,8 +136,11 @@ static int lpc32xx_pwm_probe(struct platform_device *pdev)
 static int __devexit lpc32xx_pwm_remove(struct platform_device *pdev)
 {
 	struct lpc32xx_pwm_chip *lpc32xx = platform_get_drvdata(pdev);
+	int i;
+
+	for (i = 0 ; i < lpc32xx->chip.npwm ; i += 1)
+		pwm_disable(&lpc32xx->chip.pwms[i]);
 
-	clk_disable(lpc32xx->clk);
 	return pwmchip_remove(&lpc32xx->chip);
 }
 
-- 
1.7.0.4

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