pinctrl: at91: add pinctrl driver
AT91 PIO controller is a combined gpio-controller, pin-mux and
pin-config module. The peripheral's pins are assigned through
per-pin based muxing logic.
Each SoC will have to describe the its limitation and pin
configuration via device tree. This will allow to do not need
to touch the C code when adding new SoC if the IP version is
supported.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 9d0f501..355aeae 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -150,6 +150,20 @@
definitions and pin control functions for each available multiplex
function.
+config PINCTRL_AT91
+ bool "AT91 pinctrl driver"
+ depends on DM
+ help
+ This option is to enable the AT91 pinctrl driver for AT91 PIO
+ controller. AT91 PIO controller is a combined gpio-controller,
+ pin-mux and pin-config module. Each I/O pin may be dedicated as
+ a general-purpose I/O or be assigned to a function of an embedded
+ peripheral. Each I/O pin has a glitch filter providing rejection of
+ glitches lower than one-half of peripheral clock cycle and
+ a debouncing filter providing rejection of unwanted pulses from key
+ or push button operations. You can also control the multi-driver
+ capability, pull-up and pull-down feature on each I/O pin.
+
config PINCTRL_AT91PIO4
bool "AT91 PIO4 pinctrl driver"
depends on DM