950-0701-gpio-Enable-nonexclusive-gpiods-from-DT-nodes.patch

From 76870d237adff4c8e419064e7d4f5a8ef87c1085 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Thu, 6 Dec 2018 13:43:44 +0100
Subject: [PATCH] gpio: Enable nonexclusive gpiods from DT nodes

commit ec757001c818c175e6b610e8ef80c2a25d1ed1a5 upstream.

This makes gpiod_get_from_of_node() respect the
GPIOD_FLAGS_BIT_NONEXCLUSIVE flag which is especially
nice when getting regulator GPIOs right out of device
tree nodes.

Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Fixes: b0ce7b29bfcd ("regulator/gpio: Allow nonexclusive GPIO access")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/gpio/gpiolib.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -4061,6 +4061,8 @@ struct gpio_desc *gpiod_get_from_of_node
 	transitory = flags & OF_GPIO_TRANSITORY;
 
 	ret = gpiod_request(desc, label);
+	if (ret == -EBUSY && (flags & GPIOD_FLAGS_BIT_NONEXCLUSIVE))
+		return desc;
 	if (ret)
 		return ERR_PTR(ret);