linux-kernel - [PATCH] leds: pwm: set polarity on non DT platforms

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Date:	Mon, 17 Mar 2014 19:38:41 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Bryan Wu <cooloney@...il.com>
Cc:	Richard Purdie <rpurdie@...ys.net>, linux-leds@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCH] leds: pwm: set polarity on non DT platforms

Set inversed polarity when .active_low is set in the platform_data. With device
tree, this is taken care of by of_pwm_xlate_with_flags(), called from
of_pwm_get().

Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
 drivers/leds/leds-pwm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 605047428b5a..09681556a6aa 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -180,6 +180,11 @@ static int led_pwm_probe(struct platform_device *pdev)
 			led_dat->cdev.max_brightness = cur_led->max_brightness;
 			led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
 
+			if (led_dat->active_low)
+				if (pwm_set_polarity(led_dat->pwm,
+						 PWM_POLARITY_INVERSED))
+					dev_err(&pdev->dev, "impossible to change polarity");
+
 			led_dat->can_sleep = pwm_can_sleep(led_dat->pwm);
 			if (led_dat->can_sleep)
 				INIT_WORK(&led_dat->work, led_pwm_work);
-- 
1.8.3.2

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