target/linux/ramips/patches-3.14/0049-DT-Add-documentation-for-spi-rt2880.patch

   1 From 6ed8d03e5f4283b60dffea5c10ff1484141824e7 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Fri, 9 Aug 2013 20:12:59 +0200
   4 Subject: [PATCH 49/57] DT: Add documentation for spi-rt2880
   5
   6 Describe the SPI master found on the MIPS based Ralink RT2880 SoC.
   7
   8 Signed-off-by: John Crispin <blogic@openwrt.org>
   9 ---
  10  .../devicetree/bindings/spi/spi-rt2880.txt         |   28 ++++++++++++++++++++
  11  1 file changed, 28 insertions(+)
  12  create mode 100644 Documentation/devicetree/bindings/spi/spi-rt2880.txt
  13
  14 --- /dev/null
  15 +++ b/Documentation/devicetree/bindings/spi/spi-rt2880.txt
  16 @@ -0,0 +1,28 @@
  17 +Ralink SoC RT2880 SPI master controller.
  18 +
  19 +This SPI controller is found on most wireless SoCs made by ralink.
  20 +
  21 +Required properties:
  22 +- compatible : "ralink,rt2880-spi"
  23 +- reg : The register base for the controller.
  24 +- #address-cells : <1>, as required by generic SPI binding.
  25 +- #size-cells : <0>, also as required by generic SPI binding.
  26 +
  27 +Child nodes as per the generic SPI binding.
  28 +
  29 +Example:
  30 +
  31 +       spi@b00 {
  32 +               compatible = "ralink,rt2880-spi";
  33 +               reg = <0xb00 0x100>;
  34 +
  35 +               #address-cells = <1>;
  36 +               #size-cells = <0>;
  37 +
  38 +               m25p80@0 {
  39 +                       compatible = "m25p80";
  40 +                       reg = <0>;
  41 +                       spi-max-frequency = <10000000>;
  42 +               };
  43 +       };
  44 +