target/linux/brcm2708/patches-4.4/0304-ARM-bcm2835-add-i2s-gpio28-31-for-cm.patch

   1 From 791046d531f798944715a214748387449ae9c4b8 Mon Sep 17 00:00:00 2001
   2 From: Martin Sperl <kernel@martin.sperl.org>
   3 Date: Sat, 23 Apr 2016 15:21:41 +0000
   4 Subject: [PATCH 304/381] ARM: bcm2835: add i2s-gpio28-31 for cm
   5
   6 Add i2s-gpio28-31 overlay for compute module
   7 so that i2s is using gpio28-31
   8
   9 Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
  10 ---
  11  arch/arm/boot/dts/overlays/Makefile                  |  1 +
  12  arch/arm/boot/dts/overlays/README                    |  6 ++++++
  13  arch/arm/boot/dts/overlays/i2s-gpio28-31-overlay.dts | 18 ++++++++++++++++++
  14  3 files changed, 25 insertions(+)
  15  create mode 100644 arch/arm/boot/dts/overlays/i2s-gpio28-31-overlay.dts
  16
  17 --- a/arch/arm/boot/dts/overlays/Makefile
  18 +++ b/arch/arm/boot/dts/overlays/Makefile
  19 @@ -37,6 +37,7 @@ dtbo-$(RPI_DT_OVERLAYS) += i2c-mux-pca95
  20  dtbo-$(RPI_DT_OVERLAYS) += i2c-pwm-pca9685a.dtbo
  21  dtbo-$(RPI_DT_OVERLAYS) += i2c0-bcm2708.dtbo
  22  dtbo-$(RPI_DT_OVERLAYS) += i2c1-bcm2708.dtbo
  23 +dtbo-$(RPI_DT_OVERLAYS) += i2s-gpio28-31.dtbo
  24  dtbo-$(RPI_DT_OVERLAYS) += i2s-mmap.dtbo
  25  dtbo-$(RPI_DT_OVERLAYS) += iqaudio-dac.dtbo
  26  dtbo-$(RPI_DT_OVERLAYS) += iqaudio-dacplus.dtbo
  27 --- a/arch/arm/boot/dts/overlays/README
  28 +++ b/arch/arm/boot/dts/overlays/README
  29 @@ -464,6 +464,12 @@ Params: sda1_pin                GPIO pin
  30                                  default 4)
  31
  32
  33 +Name:   i2s-gpio28-31
  34 +Info:   move I2S function block to GPIO 28 to 31
  35 +Load:   dtoverlay=i2s-gpio28-31
  36 +Params: <None>
  37 +
  38 +
  39  Name:   i2s-mmap
  40  Info:   Enables mmap support in the bcm2708-i2s driver
  41  Load:   dtoverlay=i2s-mmap
  42 --- /dev/null
  43 +++ b/arch/arm/boot/dts/overlays/i2s-gpio28-31-overlay.dts
  44 @@ -0,0 +1,18 @@
  45 +/*
  46 + * Device tree overlay to move i2s to gpio 28 to 31 on CM
  47 + */
  48 +
  49 +/dts-v1/;
  50 +/plugin/;
  51 +
  52 +/ {
  53 +       compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2708", "brcm,bcm2709";
  54 +
  55 +       fragment@0 {
  56 +               target = <&i2s_pins>;
  57 +               __overlay__ {
  58 +                       brcm,pins = <28 29 30 31>;
  59 +                       brcm,function = <6>; /* alt2 */
  60 +               };
  61 +       };
  62 +};