gpio: Kconfig: add CONFIG_AT91_GPIO option

The CONFIG_AT91_GPIO option is used to select AT91 PIO GPIO driver.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index dc4108f..c95e9ac 100644 (file)
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -28,6 +28,19 @@ config DWAPB_GPIO
        help
          Support for the Designware APB GPIO driver.
 
+config AT91_GPIO
+       bool "AT91 PIO GPIO driver"
+       depends on DM_GPIO
+       default n
+       help
+         Say yes here to select AT91 PIO GPIO driver. AT91 PIO
+         controller manages up to 32 fully programmable input/output
+         lines. Each I/O line may be dedicated as a general-purpose
+         I/O or be assigned to a function of an embedded peripheral.
+         The assignment to a function of an embedded peripheral is
+         the responsibility of AT91 Pinctrl driver. This driver is
+         responsible for the general-purpose I/O.
+
 config ATMEL_PIO4
        bool "ATMEL PIO4 driver"
        depends on DM_GPIO