git.openwrt.org Git - openwrt/staging/xback.git/blob

   1 From b37ac8c50684c3517fb9c6f737e7ea444a7d7405 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Thu, 5 Sep 2019 17:41:46 +0100
   4 Subject: [PATCH] overlays: mcp23017: Add option for not connecting the
   5  int GPIO
   6
   7 The interrupt GPIO is optional to the driver, therefore add an
   8 option to not configure it.
   9
  10 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  11 ---
  12  arch/arm/boot/dts/overlays/README             |  1 +
  13  .../boot/dts/overlays/mcp23017-overlay.dts    | 21 +++++++++++++------
  14  2 files changed, 16 insertions(+), 6 deletions(-)
  15
  16 --- a/arch/arm/boot/dts/overlays/README
  17 +++ b/arch/arm/boot/dts/overlays/README
  18 @@ -1427,6 +1427,7 @@ Params: gpiopin                 Gpio pin
  19          addr                    I2C address of the MCP23017 (default: 0x20)
  20
  21          mcp23008                Configure an MCP23008 instead.
  22 +        noints                  Disable the interrupt GPIO line.
  23
  24
  25  Name:   mcp23s17
  26 --- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
  27 +++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
  28 @@ -34,11 +34,6 @@
  29                                 reg = <0x20>;
  30                                 gpio-controller;
  31                                 #gpio-cells = <2>;
  32 -                               #interrupt-cells=<2>;
  33 -                               interrupt-parent = <&gpio>;
  34 -                               interrupts = <4 2>;
  35 -                               interrupt-controller;
  36 -                               microchip,irq-mirror;
  37
  38                                 status = "okay";
  39                         };
  40 @@ -52,11 +47,25 @@
  41                 };
  42         };
  43
  44 +       fragment@4 {
  45 +               target = <&i2c1>;
  46 +               __overlay__ {
  47 +                       mcp23017_irq: mcp@20 {
  48 +                               #interrupt-cells=<2>;
  49 +                               interrupt-parent = <&gpio>;
  50 +                               interrupts = <4 2>;
  51 +                               interrupt-controller;
  52 +                               microchip,irq-mirror;
  53 +                       };
  54 +               };
  55 +       };
  56 +
  57         __overrides__ {
  58                 gpiopin = <&mcp23017_pins>,"brcm,pins:0",
  59 -                               <&mcp23017>,"interrupts:0";
  60 +                               <&mcp23017_irq>,"interrupts:0";
  61                 addr = <&mcp23017>,"reg:0", <&mcp23017_pins>,"reg:0";
  62                 mcp23008 = <0>,"=3";
  63 +               noints = <0>,"!1!4";
  64         };
  65  };
  66