gpio: ath79: Move to the generic GPIO driver

Drop most of the code in favor of the generic MMIO GPIO driver.
As the driver now depend on CONFIG_GPIO_GENERIC also add a Kconfig
entry to make the driver optional.

We leave the base pointer and lock in the data struct because they are
needed for the IRQ support.

Signed-off-by: Alban Bedel <albeu@free.fr>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 77df86635480..020a44a52331 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -126,6 +126,15 @@ config GPIO_AMDPT
           driver for GPIO functionality on Promontory IOHub
           Require ACPI ASL code to enumerate as a platform device.
 
+config GPIO_ATH79
+        tristate "Atheros AR71XX/AR724X/AR913X GPIO support"
+        default y if ATH79
+        depends on ATH79
+        select GPIO_GENERIC
+        help
+          Select this option to enable GPIO driver for
+          Atheros AR71XX/AR724X/AR913X SoC devices.
+
 config GPIO_BCM_KONA
         bool "Broadcom Kona GPIO"
         depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST)