diff options
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/gpio-mvebu.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-mvebu.txt | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt b/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt index a6f3bec1da7d..42c3bb2d53e8 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt @@ -38,6 +38,24 @@ Required properties: - #gpio-cells: Should be two. The first cell is the pin number. The second cell is reserved for flags, unused at the moment. +Optional properties: + +In order to use the GPIO lines in PWM mode, some additional optional +properties are required. Only Armada 370 and XP support these properties. + +- compatible: Must contain "marvell,armada-370-xp-gpio" + +- reg: an additional register set is needed, for the GPIO Blink + Counter on/off registers. + +- reg-names: Must contain an entry "pwm" corresponding to the + additional register range needed for PWM operation. + +- #pwm-cells: Should be two. The first cell is the GPIO line number. The + second cell is the period in nanoseconds. + +- clocks: Must be a phandle to the clock for the GPIO controller. + Example: gpio0: gpio@d0018100 { @@ -51,3 +69,17 @@ Example: #interrupt-cells = <2>; interrupts = <16>, <17>, <18>, <19>; }; + + gpio1: gpio@18140 { + compatible = "marvell,armada-370-xp-gpio"; + reg = <0x18140 0x40>, <0x181c8 0x08>; + reg-names = "gpio", "pwm"; + ngpios = <17>; + gpio-controller; + #gpio-cells = <2>; + #pwm-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + interrupts = <87>, <88>, <89>; + clocks = <&coreclk 0>; + }; |