From a0196d111707d8b79196a40295f3935c5fa339eb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Tue, 30 Sep 2014 12:55:48 +0200 Subject: bcma: use chipcommon node from DT for SoC GPIO chip MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This will allow us to define GPIO-attached devices (LEDs, buttons) in the the device tree. Signed-off-by: Rafał Miłecki Acked-by: Arnd Bergmann Signed-off-by: John W. Linville --- Documentation/devicetree/bindings/bus/bcma.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'Documentation/devicetree/bindings/bus') diff --git a/Documentation/devicetree/bindings/bus/bcma.txt b/Documentation/devicetree/bindings/bus/bcma.txt index e9070c161172..62a48348ac15 100644 --- a/Documentation/devicetree/bindings/bus/bcma.txt +++ b/Documentation/devicetree/bindings/bus/bcma.txt @@ -9,6 +9,11 @@ Required properties: The cores on the AXI bus are automatically detected by bcma with the memory ranges they are using and they get registered afterwards. +The top-level axi bus may contain children representing attached cores +(devices). This is needed since some hardware details can't be auto +detected (e.g. IRQ numbers). Also some of the cores may be responsible +for extra things, e.g. ChipCommon providing access to the GPIO chip. + Example: axi@18000000 { @@ -17,4 +22,11 @@ Example: ranges = <0x00000000 0x18000000 0x00100000>; #address-cells = <1>; #size-cells = <1>; + + chipcommon { + reg = <0x00000000 0x1000>; + + gpio-controller; + #gpio-cells = <2>; + }; }; -- cgit v1.2.3