target/linux/brcm2708/patches-4.19/950-0315-overlays-mcp23017-Support-the-MCP23008.patch

   1 From 1cfb681bddf0f63b99296987b155a8a9efdb7bbf Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 21 Jan 2019 12:19:57 +0000
   4 Subject: [PATCH 315/703] overlays: mcp23017: Support the MCP23008
   5
   6 Add an 'mcp23008' parameter to enable support for the MCP23008 device.
   7
   8 See: https://github.com/raspberrypi/linux/issues/2818
   9
  10 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  11 ---
  12  arch/arm/boot/dts/overlays/README               |  2 ++
  13  arch/arm/boot/dts/overlays/mcp23017-overlay.dts | 10 +++++++++-
  14  2 files changed, 11 insertions(+), 1 deletion(-)
  15
  16 --- a/arch/arm/boot/dts/overlays/README
  17 +++ b/arch/arm/boot/dts/overlays/README
  18 @@ -1212,6 +1212,8 @@ Params: gpiopin                 Gpio pin
  19
  20          addr                    I2C address of the MCP23017 (default: 0x20)
  21
  22 +        mcp23008                Configure an MCP23008 instead.
  23 +
  24
  25  Name:   mcp23s17
  26  Info:   Configures the MCP23S08/17 SPI GPIO expanders.
  27 --- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
  28 +++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
  29 @@ -44,11 +44,19 @@
  30                         };
  31                 };
  32         };
  33 -
  34 +
  35 +       fragment@3 {
  36 +               target = <&mcp23017>;
  37 +               __dormant__ {
  38 +                       compatible = "microchip,mcp23008";
  39 +               };
  40 +       };
  41 +
  42         __overrides__ {
  43                 gpiopin = <&mcp23017_pins>,"brcm,pins:0",
  44                                 <&mcp23017>,"interrupts:0";
  45                 addr = <&mcp23017>,"reg:0";
  46 +               mcp23008 = <0>,"=3";
  47         };
  48  };
  49