2019-09-19 14:43:19 +00:00
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From 76870d237adff4c8e419064e7d4f5a8ef87c1085 Mon Sep 17 00:00:00 2001
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From: Linus Walleij <linus.walleij@linaro.org>
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Date: Thu, 6 Dec 2018 13:43:44 +0100
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2019-12-23 12:42:55 +00:00
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Subject: [PATCH] gpio: Enable nonexclusive gpiods from DT nodes
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2019-09-19 14:43:19 +00:00
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commit ec757001c818c175e6b610e8ef80c2a25d1ed1a5 upstream.
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This makes gpiod_get_from_of_node() respect the
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GPIOD_FLAGS_BIT_NONEXCLUSIVE flag which is especially
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nice when getting regulator GPIOs right out of device
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tree nodes.
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Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
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Fixes: b0ce7b29bfcd ("regulator/gpio: Allow nonexclusive GPIO access")
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Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
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Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
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Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
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Signed-off-by: Mark Brown <broonie@kernel.org>
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---
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drivers/gpio/gpiolib.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/drivers/gpio/gpiolib.c
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+++ b/drivers/gpio/gpiolib.c
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2019-11-21 13:09:35 +00:00
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@@ -4053,6 +4053,8 @@ struct gpio_desc *gpiod_get_from_of_node
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2019-09-19 14:43:19 +00:00
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transitory = flags & OF_GPIO_TRANSITORY;
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ret = gpiod_request(desc, label);
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+ if (ret == -EBUSY && (flags & GPIOD_FLAGS_BIT_NONEXCLUSIVE))
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+ return desc;
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if (ret)
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return ERR_PTR(ret);
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