Signed-off-by: Y Vo <yvo@xxxxxxx>
---
.../devicetree/bindings/gpio/gpio-xgene-sb.txt | 26 ++++++++++++++-----
1 files changed, 19 insertions(+), 7 deletions(-)
diff --git a/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
index dae1300..bee1347 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
@@ -3,8 +3,11 @@ APM X-Gene Standby GPIO controller bindings
This is a gpio controller in the standby domain.
There are 20 GPIO pins from 0..21. There is no GPIO_DS14 or GPIO_DS15,
-only GPIO_DS8..GPIO_DS13 support interrupts. The IRQ mapping
+only GPIO_DS8..GPIO_DS13 support external interrupts. The IRQ mapping
is currently 1-to-1 on interrupts 0x28 thru 0x2d.
+GPIO pins from GPIO_DS8 to GPIO_DS13 are configured as external interrupt
+by default. If one wish not to use any of these pins as external interrupts,
+the corresponding interrupt resource for those pins should be removed.
Required properties:
- compatible: "apm,xgene-gpio-sb" for the X-Gene Standby GPIO controller
@@ -23,10 +26,19 @@ Example:
reg = <0x0 0x17001000 0x0 0x400>;
#gpio-cells = <2>;
gpio-controller;
- interrupts = <0x0 0x28 0x1>,
- <0x0 0x29 0x1>,
- <0x0 0x2a 0x1>,
- <0x0 0x2b 0x1>,
- <0x0 0x2c 0x1>,
- <0x0 0x2d 0x1>;
+ interrupts = <0x0 0x28 0x1>, /* GPIO_DS8 */
+ <0x0 0x29 0x1>, /* GPIO_DS9 */
+ <0x0 0x2a 0x1>, /* GPIO_DS10 */
+ <0x0 0x2b 0x1>, /* GPIO_DS11 */
+ <0x0 0x2c 0x1>, /* GPIO_DS12 */
+ <0x0 0x2d 0x1>; /* GPIO_DS13 */
};
+
+/* Board-specific: exclude GPIO_DS8 to leave it as GPIO */
+&sbgpio {
+ interrupts = <0x0 0x29 0x1>, /* GPIO_DS9 */
+ <0x0 0x2a 0x1>, /* GPIO_DS10 */
+ <0x0 0x2b 0x1>, /* GPIO_DS11 */
+ <0x0 0x2c 0x1>, /* GPIO_DS12 */
+ <0x0 0x2d 0x1>; /* GPIO_DS13 */
+}
--
1.7.1
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