target/linux/generic/patches-4.0/022-bcma-from-4.2.patch

   1 --- a/drivers/bcma/driver_gpio.c
   2 +++ b/drivers/bcma/driver_gpio.c
   3 @@ -226,6 +226,7 @@ int bcma_gpio_init(struct bcma_drv_cc *c
   4                 chip->of_node   = cc->core->dev.of_node;
   5  #endif
   6         switch (bus->chipinfo.id) {
   7 +       case BCMA_CHIP_ID_BCM4707:
   8         case BCMA_CHIP_ID_BCM5357:
   9         case BCMA_CHIP_ID_BCM53572:
  10                 chip->ngpio     = 32;
  11 @@ -235,16 +236,17 @@ int bcma_gpio_init(struct bcma_drv_cc *c
  12         }
  13
  14         /*
  15 -        * On MIPS we register GPIO devices (LEDs, buttons) using absolute GPIO
  16 -        * pin numbers. We don't have Device Tree there and we can't really use
  17 -        * relative (per chip) numbers.
  18 -        * So let's use predictable base for BCM47XX and "random" for all other.
  19 +        * Register SoC GPIO devices with absolute GPIO pin base.
  20 +        * On MIPS, we don't have Device Tree and we can't use relative (per chip)
  21 +        * GPIO numbers.
  22 +        * On some ARM devices, user space may want to access some system GPIO
  23 +        * pins directly, which is easier to do with a predictable GPIO base.
  24          */
  25 -#if IS_BUILTIN(CONFIG_BCM47XX)
  26 -       chip->base              = bus->num * BCMA_GPIO_MAX_PINS;
  27 -#else
  28 -       chip->base              = -1;
  29 -#endif
  30 +       if (IS_BUILTIN(CONFIG_BCM47XX) ||
  31 +           cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
  32 +               chip->base              = bus->num * BCMA_GPIO_MAX_PINS;
  33 +       else
  34 +               chip->base              = -1;
  35
  36         err = bcma_gpio_irq_domain_init(cc);
  37         if (err)