target/linux/brcm63xx/patches-4.9/001-4.12-02-spi-bcm63xx-document-device-tree-bindings.patch

   1 From 0a0c39044332a75eaf4a3c5654079df953b0d839 Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jogo@openwrt.org>
   3 Date: Mon, 7 Sep 2015 21:00:38 +0200
   4 Subject: [PATCH 3/8] spi/bcm63xx: document device tree bindings
   5
   6 Add documentation for the bindings of the low speed SPI controller found
   7 on most bcm63xx SoCs.
   8
   9 Signed-off-by: Jonas Gorski <jogo@openwrt.org>
  10 ---
  11  .../devicetree/bindings/spi/spi-bcm63xx.txt        | 33 ++++++++++++++++++++++
  12  1 file changed, 33 insertions(+)
  13  create mode 100644 Documentation/devicetree/bindings/spi/spi-bcm63xx.txt
  14
  15 --- /dev/null
  16 +++ b/Documentation/devicetree/bindings/spi/spi-bcm63xx.txt
  17 @@ -0,0 +1,33 @@
  18 +Binding for Broadcom BCM6348/BCM6358 SPI controller
  19 +
  20 +Required properties:
  21 +- compatible: must contain one of "brcm,bcm6348-spi", "brcm,bcm6358-spi".
  22 +- reg: Base address and size of the controllers memory area.
  23 +- interrupts: Interrupt for the SPI block.
  24 +- clocks: phandle of the SPI clock.
  25 +- clock-names: has to be "spi".
  26 +- #address-cells: <1>, as required by generic SPI binding.
  27 +- #size-cells: <0>, also as required by generic SPI binding.
  28 +
  29 +Optional properties:
  30 +- num-cs: some controllers have less than 8 cs signals. Defaults to 8
  31 +  if absent.
  32 +
  33 +Child nodes as per the generic SPI binding.
  34 +
  35 +Example:
  36 +
  37 +       spi@10000800 {
  38 +               compatible = "brcm,bcm6368-spi", "brcm,bcm6358-spi";
  39 +               reg = <0x10000800 0x70c>;
  40 +
  41 +               interrupts = <1>;
  42 +
  43 +               clocks = <&clkctl 9>;
  44 +               clock-names = "spi";
  45 +
  46 +               num-cs = <5>;
  47 +
  48 +               #address-cells = <1>;
  49 +               #size-cells = <0>;
  50 +       };