linux-kernel - [PATCH 3.2 059/185] backlight: atmel-pwm-bl: fix gpio polarity in remove

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Date:	Sun, 29 Dec 2013 03:08:43 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Johan Hovold" <jhovold@...il.com>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Jingoo Han" <jg1.han@...sung.com>
Subject: [PATCH 3.2 059/185] backlight: atmel-pwm-bl: fix gpio polarity in
 remove

3.2.54-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <jhovold@...il.com>

commit ad5066d4c2b1d696749f8d7816357c23b648c4d3 upstream.

Make sure to honour gpio polarity also at remove so that the backlight is
actually disabled on boards with active-low enable pin.

Signed-off-by: Johan Hovold <jhovold@...il.com>
Acked-by: Jingoo Han <jg1.han@...sung.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/video/backlight/atmel-pwm-bl.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/video/backlight/atmel-pwm-bl.c
+++ b/drivers/video/backlight/atmel-pwm-bl.c
@@ -211,7 +211,8 @@ static int __exit atmel_pwm_bl_remove(st
 	struct atmel_pwm_bl *pwmbl = platform_get_drvdata(pdev);
 
 	if (pwmbl->gpio_on != -1) {
-		gpio_set_value(pwmbl->gpio_on, 0);
+		gpio_set_value(pwmbl->gpio_on,
+					0 ^ pwmbl->pdata->on_active_low);
 		gpio_free(pwmbl->gpio_on);
 	}
 	pwm_channel_disable(&pwmbl->pwmc);

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