target/linux/brcm2708/patches-4.14/950-0298-Add-ability-to-export-gpio-used-by-gpio-poweroff.patch

   1 From 62712a1a87724194500e1786a65578964838f4d8 Mon Sep 17 00:00:00 2001
   2 From: Nick Bulleid <nedbulleid@fastmail.com>
   3 Date: Thu, 10 May 2018 21:57:02 +0100
   4 Subject: [PATCH 298/454] Add ability to export gpio used by gpio-poweroff
   5
   6 Signed-off-by: Nick Bulleid <nedbulleid@fastmail.com>
   7 ---
   8  drivers/power/reset/gpio-poweroff.c | 9 +++++++++
   9  1 file changed, 9 insertions(+)
  10
  11 --- a/drivers/power/reset/gpio-poweroff.c
  12 +++ b/drivers/power/reset/gpio-poweroff.c
  13 @@ -50,6 +50,7 @@ static int gpio_poweroff_probe(struct pl
  14         bool input = false;
  15         enum gpiod_flags flags;
  16         bool force = false;
  17 +       bool export = false;
  18
  19         /* If a pm_power_off function has already been added, leave it alone */
  20         force = of_property_read_bool(pdev->dev.of_node, "force");
  21 @@ -70,6 +71,12 @@ static int gpio_poweroff_probe(struct pl
  22         if (IS_ERR(reset_gpio))
  23                 return PTR_ERR(reset_gpio);
  24
  25 +       export = of_property_read_bool(pdev->dev.of_node, "export");
  26 +       if (export) {
  27 +               gpiod_export(reset_gpio, false);
  28 +               gpiod_export_link(&pdev->dev, "poweroff-gpio", reset_gpio);
  29 +       }
  30 +
  31         pm_power_off = &gpio_poweroff_do_poweroff;
  32         return 0;
  33  }
  34 @@ -79,6 +86,8 @@ static int gpio_poweroff_remove(struct p
  35         if (pm_power_off == &gpio_poweroff_do_poweroff)
  36                 pm_power_off = NULL;
  37
  38 +       gpiod_unexport(reset_gpio);
  39 +
  40         return 0;
  41  }
  42