diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2016-08-03 15:05:56 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-08-11 17:15:53 +0300 |
| commit | c17c2db99cb3ffc58ae4d184af54f0d172321ef5 (patch) | |
| tree | d1d7c63f1c1c874bddccb2c9a0a53b1a59e0c78c /Documentation/devicetree/bindings/gpio | |
| parent | de4b894182094e9d717df98c75344dd50ebbe2ea (diff) | |
| download | linux-c17c2db99cb3ffc58ae4d184af54f0d172321ef5.tar.xz | |
gpio: dt-bindings: add brcm,bcm6345-gpio bindings
This patch adds the device tree bindings for the Broadcom's BCM6345
memory-mapped GPIO controllers.
The gpios will be supported by gpio-mmio code of the
GPIO generic library.
Signed-off-by: Álvaro Fernández Rojas <noltari@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/brcm,bcm6345-gpio.txt | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/brcm,bcm6345-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,bcm6345-gpio.txt new file mode 100644 index 000000000000..e7853143fa42 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/brcm,bcm6345-gpio.txt @@ -0,0 +1,46 @@ +Bindings for the Broadcom's brcm,bcm6345-gpio memory-mapped GPIO controllers. + +These bindings can be used on any BCM63xx SoC. However, BCM6338 and BCM6345 +are the only ones which don't need a pinctrl driver. +BCM6338 have 8-bit data and dirout registers, where GPIO state can be read +and/or written, and the direction changed from input to output. +BCM6345 have 16-bit data and dirout registers, where GPIO state can be read +and/or written, and the direction changed from input to output. + +Required properties: + - compatible: should be "brcm,bcm6345-gpio" + - reg-names: must contain + "dat" - data register + "dirout" - direction (output) register + - reg: address + size pairs describing the GPIO register sets; + order must correspond with the order of entries in reg-names + - #gpio-cells: must be set to 2. The first cell is the pin number and + the second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low + - gpio-controller: Marks the device node as a gpio controller. + +Optional properties: + - native-endian: use native endian memory. + +Examples: + - BCM6338: + gpio: gpio-controller@fffe0407 { + compatible = "brcm,bcm6345-gpio"; + reg-names = "dirout", "dat"; + reg = <0xfffe0407 1>, <0xfffe040f 1>; + + #gpio-cells = <2>; + gpio-controller; + }; + + - BCM6345: + gpio: gpio-controller@fffe0406 { + compatible = "brcm,bcm6345-gpio"; + reg-names = "dirout", "dat"; + reg = <0xfffe0406 2>, <0xfffe040a 2>; + native-endian; + + #gpio-cells = <2>; + gpio-controller; + }; |