[3.5.y.z extended stable] Patch "backlight: atmel-pwm-bl: fix gpio polarity in remove" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Tue Nov 19 13:18:27 UTC 2013

This is a note to let you know that I have just added a patch titled

    backlight: atmel-pwm-bl: fix gpio polarity in remove

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



>From 9bd32697ffaeff30c8c3da94f63a04793a6e4ace Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold at gmail.com>
Date: Tue, 12 Nov 2013 15:09:39 -0800
Subject: backlight: atmel-pwm-bl: fix gpio polarity in remove

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 at gmail.com>
Acked-by: Jingoo Han <jg1.han at samsung.com>
Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>
[ luis: backported to 3.5: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 drivers/video/backlight/atmel-pwm-bl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
index 4d2bbd8..dab3a0c 100644
--- 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(struct platform_device *pdev)
 	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);

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