target/linux/bcm53xx/patches-4.1/813-USB-bcma-fix-setting-VCC-GPIO-value.patch

   1 From bdc3b01d94b22f8b5f9621a1c37336e78f4f1bce Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
   3 Date: Sun, 21 Jun 2015 12:09:57 +0200
   4 Subject: [PATCH] USB: bcma: fix setting VCC GPIO value
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 It wasn't working (on most of devices?) without setting GPIO direction
  10 and wasn't respecting ACTIVE_LOW flag.
  11
  12 Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  13 ---
  14  drivers/usb/host/bcma-hcd.c | 13 +++++++++----
  15  1 file changed, 9 insertions(+), 4 deletions(-)
  16
  17 --- a/drivers/usb/host/bcma-hcd.c
  18 +++ b/drivers/usb/host/bcma-hcd.c
  19 @@ -230,17 +230,22 @@ static void bcma_hcd_init_chip_arm(struc
  20
  21  static void bcma_hci_platform_power_gpio(struct bcma_device *dev, bool val)
  22  {
  23 +       enum of_gpio_flags of_flags;
  24         int gpio;
  25
  26 -       gpio = of_get_named_gpio(dev->dev.of_node, "vcc-gpio", 0);
  27 +       gpio = of_get_named_gpio_flags(dev->dev.of_node, "vcc-gpio", 0, &of_flags);
  28         if (!gpio_is_valid(gpio))
  29                 return;
  30
  31         if (val) {
  32 -               gpio_request(gpio, "bcma-hcd-gpio");
  33 -               gpio_set_value(gpio, 1);
  34 +               unsigned long flags = 0;
  35 +               bool active_low = !!(of_flags & OF_GPIO_ACTIVE_LOW);
  36 +
  37 +               flags |= active_low ? GPIOF_ACTIVE_LOW : 0;
  38 +               flags |= active_low ? GPIOF_INIT_LOW : GPIOF_INIT_HIGH;
  39 +               gpio_request_one(gpio, flags, "bcma-hcd-gpio");
  40         } else {
  41 -               gpio_set_value(gpio, 0);
  42 +               gpiod_set_value(gpio_to_desc(gpio), 0);
  43                 gpio_free(gpio);
  44         }
  45  }