pinctrl: st: Add pinctrl and pinconf support.
This patch add pinctrl support to ST SoCs.
About hardware:
ST Set-Top-Box parts have two blocks called PIO and PIO-mux which handle
pin configurations.
Each multi-function pin is controlled, driven and routed through the PIO
multiplexing block. Each pin supports GPIO functionality (ALT0) and
multiple alternate functions(ALT1 - ALTx) that directly connect the pin
to different hardware blocks. When a pin is in GPIO mode, Output Enable
(OE), Open Drain(OD), and Pull Up (PU) are driven by the related PIO
block. Otherwise the PIO multiplexing block configures these parameters
and retiming the signal.
About driver:
This pinctrl driver manages both PIO and PIO-mux block using pinctrl,
pinconf, pinmux, gpio subsystems. All the pinctrl related config
information can only come from device trees.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 8f66924..1a147cf 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -169,6 +169,12 @@
select PINMUX
select GENERIC_PINCONF
+config PINCTRL_ST
+ bool
+ depends on OF
+ select PINMUX
+ select PINCONF
+
config PINCTRL_TEGRA
bool
select PINMUX