diff options
| author | Roland Stigge <stigge@antcom.de> | 2012-05-18 10:19:52 +0200 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2012-05-18 16:48:36 -0600 |
| commit | e92935e13a052df7e6bc274e00fc91b80531f1e4 (patch) | |
| tree | b04f80aa90bab2d71f2299b00f5cccc3e7ee9a7a /Documentation/devicetree | |
| parent | 3d0f7cf0f3633f92ddeb767eb59cab73963d4dee (diff) | |
gpio/lpc32xx: Add device tree support
This patch adds device tree support for gpio-lpc32xx.c.
To register the various GPIO banks as (struct) gpio_chips via the same DT
gpio-controller, we utilize the adjusted of_xlate API to manipulate the
actually used struct gpio_chip.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio_lpc32xx.txt | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio_lpc32xx.txt b/Documentation/devicetree/bindings/gpio/gpio_lpc32xx.txt new file mode 100644 index 000000000000..49819367a011 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio_lpc32xx.txt @@ -0,0 +1,43 @@ +NXP LPC32xx SoC GPIO controller + +Required properties: +- compatible: must be "nxp,lpc3220-gpio" +- reg: Physical base address and length of the controller's registers. +- gpio-controller: Marks the device node as a GPIO controller. +- #gpio-cells: Should be 3: + 1) bank: + 0: GPIO P0 + 1: GPIO P1 + 2: GPIO P2 + 3: GPIO P3 + 4: GPI P3 + 5: GPO P3 + 2) pin number + 3) optional parameters: + - bit 0 specifies polarity (0 for normal, 1 for inverted) +- reg: Index of the GPIO group + +Example: + + gpio: gpio@40028000 { + compatible = "nxp,lpc3220-gpio"; + reg = <0x40028000 0x1000>; + gpio-controller; + #gpio-cells = <3>; /* bank, pin, flags */ + }; + + leds { + compatible = "gpio-leds"; + + led0 { + gpios = <&gpio 5 1 1>; /* GPO_P3 1, active low */ + linux,default-trigger = "heartbeat"; + default-state = "off"; + }; + + led1 { + gpios = <&gpio 5 14 1>; /* GPO_P3 14, active low */ + linux,default-trigger = "timer"; + default-state = "off"; + }; + }; |