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authorJoachim Eastwood <manabian@gmail.com>2015-05-02 23:11:35 +0200
committerLinus Walleij <linus.walleij@linaro.org>2015-05-05 17:53:47 +0200
commitc61f819a45f6f71a295502e4c37d09173e74c380 (patch)
tree00aed5390968270af15c454972c7aa464dc3211e /Documentation/devicetree/bindings/gpio
parent13a43fd9e90552c8258981d0a0eb82d73406c24d (diff)
gpio: add DT bindings for lpc1850-gpio driver
Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio')
-rw-r--r--Documentation/devicetree/bindings/gpio/nxp,lpc1850-gpio.txt39
1 files changed, 39 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/nxp,lpc1850-gpio.txt b/Documentation/devicetree/bindings/gpio/nxp,lpc1850-gpio.txt
new file mode 100644
index 000000000000..eb7cdd69e10b
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/nxp,lpc1850-gpio.txt
@@ -0,0 +1,39 @@
+NXP LPC18xx/43xx GPIO controller Device Tree Bindings
+-----------------------------------------------------
+
+Required properties:
+- compatible : Should be "nxp,lpc1850-gpio"
+- reg : Address and length of the register set for the device
+- clocks : Clock specifier (see clock bindings for details)
+- gpio-controller : Marks the device node as a GPIO controller.
+- #gpio-cells : Should be two
+ - First cell is the GPIO line number
+ - Second cell is used to specify polarity
+
+Optional properties:
+- gpio-ranges : Mapping between GPIO and pinctrl
+
+Example:
+#define LPC_GPIO(port, pin) (port * 32 + pin)
+#define LPC_PIN(port, pin) (0x##port * 32 + pin)
+
+gpio: gpio@400f4000 {
+ compatible = "nxp,lpc1850-gpio";
+ reg = <0x400f4000 0x4000>;
+ clocks = <&ccu1 CLK_CPU_GPIO>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-ranges = <&pinctrl LPC_GPIO(0,0) LPC_PIN(0,0) 2>,
+ ...
+ <&pinctrl LPC_GPIO(7,19) LPC_PIN(f,5) 7>;
+};
+
+gpio_joystick {
+ compatible = "gpio-keys-polled";
+ ...
+
+ button@0 {
+ ...
+ gpios = <&gpio LPC_GPIO(4,8) GPIO_ACTIVE_LOW>;
+ };
+};