brcm63xx: register SPI controllers through DT

Register SPI controllers through device tree. We will wire up the clocks
at a later stage.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-4.4/001-4.12-02-spi-bcm63xx-document-device-tree-bindings.patch b/target/linux/brcm63xx/patches-4.4/001-4.12-02-spi-bcm63xx-document-device-tree-bindings.patch
new file mode 100644
index 0000000..524c50e
--- /dev/null
+++ b/target/linux/brcm63xx/patches-4.4/001-4.12-02-spi-bcm63xx-document-device-tree-bindings.patch
@@ -0,0 +1,50 @@
+From 0a0c39044332a75eaf4a3c5654079df953b0d839 Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jogo@openwrt.org>
+Date: Mon, 7 Sep 2015 21:00:38 +0200
+Subject: [PATCH 3/8] spi/bcm63xx: document device tree bindings
+
+Add documentation for the bindings of the low speed SPI controller found
+on most bcm63xx SoCs.
+
+Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+---
+ .../devicetree/bindings/spi/spi-bcm63xx.txt        | 33 ++++++++++++++++++++++
+ 1 file changed, 33 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/spi/spi-bcm63xx.txt
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/spi/spi-bcm63xx.txt
+@@ -0,0 +1,33 @@
++Binding for Broadcom BCM6348/BCM6358 SPI controller
++
++Required properties:
++- compatible: must contain one of "brcm,bcm6348-spi", "brcm,bcm6358-spi".
++- reg: Base address and size of the controllers memory area.
++- interrupts: Interrupt for the SPI block.
++- clocks: phandle of the SPI clock.
++- clock-names: has to be "spi".
++- #address-cells: <1>, as required by generic SPI binding.
++- #size-cells: <0>, also as required by generic SPI binding.
++
++Optional properties:
++- num-cs: some controllers have less than 8 cs signals. Defaults to 8
++  if absent.
++
++Child nodes as per the generic SPI binding.
++
++Example:
++
++	spi@10000800 {
++		compatible = "brcm,bcm6368-spi", "brcm,bcm6358-spi";
++		reg = <0x10000800 0x70c>;
++
++		interrupts = <1>;
++
++		clocks = <&clkctl 9>;
++		clock-names = "spi";
++
++		num-cs = <5>;
++
++		#address-cells = <1>;
++		#size-cells = <0>;
++	};