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Subject[PATCH v2 3/6] dt-bindings: brcmstb-gpio: document properties for wakeup
Date
Some brcmstb GPIO controllers can be used to wake from suspend, so use the
de facto standard property 'wakeup-source' to mark the nodes of controllers
with that capability.

Also document interrupts-extended, which will be used for wakeup handling
because the interrupt parent for the wake IRQ is different from the regular
IRQ.

Signed-off-by: Gregory Fong <gregory.0xf0@gmail.com>
---
New in v2.

.../devicetree/bindings/gpio/brcm,brcmstb-gpio.txt | 26 +++++++++++++++++++++-
1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
index 435f1bc..568814f 100644
--- a/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
+++ b/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
@@ -33,6 +33,12 @@ Optional properties:
- interrupt-parent:
phandle of the parent interrupt controller

+- interrupts-extended:
+ Alternate form of specifying interrupts and parents that allows for
+ multiple parents. This takes precedence over 'interrupts' and
+ 'interrupt-parent'. This probably must be used if the wakeup-source
+ property is provided because that may have a different interrupt parent.
+
- #interrupt-cells:
Should be <2>. The first cell is the GPIO number, the second should specify
flags. The following subset of flags is supported:
@@ -48,7 +54,10 @@ Optional properties:
Marks the device node as an interrupt controller

- interrupt-names:
- The name of the IRQ resource used by this controller
+ The names of the IRQ resources used by this controller
+
+- wakeup-source:
+ GPIOs for this controller can be used as a wakeup source

Example:
upg_gio: gpio@f040a700 {
@@ -63,3 +72,18 @@ Example:
interrupt-names = "upg_gio";
brcm,gpio-bank-widths = <0x20 0x20 0x20 0x18>;
};
+
+ upg_gio_aon: gpio@f04172c0 {
+ #gpio-cells = <0x2>;
+ #interrupt-cells = <0x2>;
+ compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";
+ gpio-controller;
+ interrupt-controller;
+ reg = <0xf04172c0 0x40>;
+ interrupt-parent = <0xc>;
+ interrupts = <0x6>;
+ interrupts-extended = <0xc 0x6 0xa 0x5>;
+ interrupt-names = "upg_gio_aon", "upg_gio_aon_wakeup";
+ wakeup-source;
+ brcm,gpio-bank-widths = <0x12 0x4>;
+ };
--
1.9.1


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