You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.6 KiB
Diff
53 lines
1.6 KiB
Diff
Document the optional parameters needed for PWM operation of gpio
|
|
lines.
|
|
|
|
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
|
|
---
|
|
.../devicetree/bindings/gpio/gpio-mvebu.txt | 31 ++++++++++++++++++++++
|
|
1 file changed, 31 insertions(+)
|
|
|
|
--- a/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt
|
|
+++ b/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt
|
|
@@ -38,6 +38,23 @@ 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 supports these
|
|
+properties.
|
|
+
|
|
+- 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 pin number. The
|
|
+ second cell is reserved for flags, unused at the moment.
|
|
+
|
|
+- clocks: Must be a phandle to the clock for the gpio controller.
|
|
+
|
|
Example:
|
|
|
|
gpio0: gpio@d0018100 {
|
|
@@ -51,3 +68,17 @@ Example:
|
|
#interrupt-cells = <2>;
|
|
interrupts = <16>, <17>, <18>, <19>;
|
|
};
|
|
+
|
|
+ gpio1: gpio@18140 {
|
|
+ compatible = "marvell,orion-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>;
|
|
+ };
|