From: Claudiu Beznea <claudiu.bez...@microchip.com>
Add documentation for at91 pin controller banks.
Signed-off-by: Claudiu Beznea <claudiu.bez...@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroc...@microchip.com>
---
.../bindings/pinctrl/atmel,at91-pinctrl.txt | 23 ++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
index 3e23fece99da..40e33dfc36fd 100644
--- a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
@@ -116,6 +116,18 @@ Some requirements for using atmel,at91rm9200-pinctrl
binding:
configurations by referring to the phandle of that pin configuration node.
4. The gpio controller must be describe in the pinctrl simple-bus.
+For each bank the required properties are:
+- compatible: "atmel,at91sam9x5-gpio" or "atmel,at91rm9200-gpio"
+- reg: physical base address and length of the controller's registers
+- interrupts: interrupt outputs from the controller
+- interrupt-controller: marks the device node as an interrupt controller
+- #interrupt-cells: should be 2; refer to
../interrupt-controller/interrupts.txt
+ for more details.
+- gpio-controller
+- #gpio-cells: should be 2; the first cell is the GPIO number and the second
+ cell specifies GPIO flags as defined in <dt-bindings/gpio/gpio.h>.
+- clocks: bank clock
+
Examples:
pinctrl@fffff400 {
@@ -125,6 +137,17 @@ pinctrl@fffff400 {
compatible = "atmel,at91rm9200-pinctrl", "simple-bus";
reg = <0xfffff400 0x600>;
+ pioA: gpio@fffff400 {
+ compatible = "atmel,at91sam9x5-gpio";
+ reg = <0xfffff400 0x200>;
+ interrupts = <2 IRQ_TYPE_LEVEL_HIGH 1>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;
+ };
+
atmel,mux-mask = <
/* A B */
0xffffffff 0xffc00c3b /* pioA */
--
2.7.4
