target/linux/brcm2708/patches-4.19/950-0701-gpio-Enable-nonexclusive-gpiods-from-DT-nodes.patch

   1 From 76870d237adff4c8e419064e7d4f5a8ef87c1085 Mon Sep 17 00:00:00 2001
   2 From: Linus Walleij <linus.walleij@linaro.org>
   3 Date: Thu, 6 Dec 2018 13:43:44 +0100
   4 Subject: [PATCH] gpio: Enable nonexclusive gpiods from DT nodes
   5
   6 commit ec757001c818c175e6b610e8ef80c2a25d1ed1a5 upstream.
   7
   8 This makes gpiod_get_from_of_node() respect the
   9 GPIOD_FLAGS_BIT_NONEXCLUSIVE flag which is especially
  10 nice when getting regulator GPIOs right out of device
  11 tree nodes.
  12
  13 Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
  14 Fixes: b0ce7b29bfcd ("regulator/gpio: Allow nonexclusive GPIO access")
  15 Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
  16 Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
  17 Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
  18 Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
  19 Signed-off-by: Mark Brown <broonie@kernel.org>
  20 ---
  21  drivers/gpio/gpiolib.c | 2 ++
  22  1 file changed, 2 insertions(+)
  23
  24 --- a/drivers/gpio/gpiolib.c
  25 +++ b/drivers/gpio/gpiolib.c
  26 @@ -4061,6 +4061,8 @@ struct gpio_desc *gpiod_get_from_of_node
  27         transitory = flags & OF_GPIO_TRANSITORY;
  28
  29         ret = gpiod_request(desc, label);
  30 +       if (ret == -EBUSY && (flags & GPIOD_FLAGS_BIT_NONEXCLUSIVE))
  31 +               return desc;
  32         if (ret)
  33                 return ERR_PTR(ret);
  34