linux-kernel - [PATCH 2/3] backlight: tdo24m: add the reset line gpio

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Message-Id: <20171006195826.27500-2-robert.jarzmik@free.fr>
Date:   Fri,  6 Oct 2017 21:58:24 +0200
From:   Robert Jarzmik <robert.jarzmik@...e.fr>
To:     Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Robert Jarzmik <robert.jarzmik@...e.fr>
Subject: [PATCH 2/3] backlight: tdo24m: add the reset line gpio

The Toppoly panels have a global reset line. Add an optional gpio
control for this line, for platforms which have the ability to drive it.

Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
---
 drivers/video/backlight/tdo24m.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c
index e4bd63e9db6b..e4b2dfabf192 100644
--- a/drivers/video/backlight/tdo24m.c
+++ b/drivers/video/backlight/tdo24m.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/gpio/consumer.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/device.h>
@@ -32,6 +33,7 @@ struct tdo24m {
 	struct spi_message	msg;
 	struct spi_transfer	xfer;
 	uint8_t			*buf;
+	struct gpio_desc	*xres;
 
 	int (*adj_mode)(struct tdo24m *lcd, int mode);
 	int color_invert;
@@ -364,6 +366,7 @@ static int tdo24m_probe(struct spi_device *spi)
 	if (lcd->buf == NULL)
 		return -ENOMEM;
 
+	lcd->xres = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);
 	m = &lcd->msg;
 	x = &lcd->xfer;
 
-- 
2.11.0