target/linux/brcm2708/patches-4.4/0558-BCM270X_DT-Add-i2c-sensor-overlay.patch

   1 From b2a2630ad69cc2f76fc027f1e730d6d82f84ea82 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 5 Dec 2016 17:10:44 +0000
   4 Subject: [PATCH] BCM270X_DT: Add i2c-sensor overlay
   5
   6 The i2c-sensor overlay is a container for various pressure and
   7 temperature sensors, currently bmp085 and bmp280. The standalone
   8 bmp085_i2c-sensor overlay is now deprecated.
   9
  10 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  11 ---
  12  arch/arm/boot/dts/overlays/Makefile               |  1 +
  13  arch/arm/boot/dts/overlays/README                 | 12 ++++++--
  14  arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts | 34 +++++++++++++++++++++++
  15  3 files changed, 45 insertions(+), 2 deletions(-)
  16  create mode 100644 arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts
  17
  18 --- a/arch/arm/boot/dts/overlays/Makefile
  19 +++ b/arch/arm/boot/dts/overlays/Makefile
  20 @@ -42,6 +42,7 @@ dtbo-$(RPI_DT_OVERLAYS) += i2c-gpio.dtbo
  21  dtbo-$(RPI_DT_OVERLAYS) += i2c-mux.dtbo
  22  dtbo-$(RPI_DT_OVERLAYS) += i2c-pwm-pca9685a.dtbo
  23  dtbo-$(RPI_DT_OVERLAYS) += i2c-rtc.dtbo
  24 +dtbo-$(RPI_DT_OVERLAYS) += i2c-sensor.dtbo
  25  dtbo-$(RPI_DT_OVERLAYS) += i2c0-bcm2708.dtbo
  26  dtbo-$(RPI_DT_OVERLAYS) += i2c1-bcm2708.dtbo
  27  dtbo-$(RPI_DT_OVERLAYS) += i2s-gpio28-31.dtbo
  28 --- a/arch/arm/boot/dts/overlays/README
  29 +++ b/arch/arm/boot/dts/overlays/README
  30 @@ -283,8 +283,7 @@ Params: swap_lr                 Reverse
  31
  32
  33  Name:   bmp085_i2c-sensor
  34 -Info:   Configures the BMP085/BMP180 digital barometric pressure and temperature
  35 -        sensors from Bosch Sensortec
  36 +Info:   This overlay is now deprecated - see i2c-sensor
  37  Load:   dtoverlay=bmp085_i2c-sensor
  38  Params: <None>
  39
  40 @@ -536,6 +535,15 @@ Params: abx80x                  Select o
  41                                  source
  42
  43
  44 +Name:   i2c-sensor
  45 +Info:   Adds support for a number of I2C barometric pressure and temperature
  46 +        sensors on i2c_arm
  47 +Load:   dtoverlay=i2c-sensor,<param>=<val>
  48 +Params: bmp085                  Select the Bosch sensortronic BMP085
  49 +
  50 +        bmp280                  Select the Bosch sensortronic BMP280
  51 +
  52 +
  53  Name:   i2c0-bcm2708
  54  Info:   Enable the i2c_bcm2708 driver for the i2c0 bus. Not all pin combinations
  55          are usable on all platforms.
  56 --- /dev/null
  57 +++ b/arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts
  58 @@ -0,0 +1,34 @@
  59 +// Definitions for a few digital barometric pressure and temperature sensors
  60 +/dts-v1/;
  61 +/plugin/;
  62 +
  63 +/ {
  64 +        compatible = "brcm,bcm2708";
  65 +
  66 +        fragment@0 {
  67 +                target = <&i2c_arm>;
  68 +                __overlay__ {
  69 +                        #address-cells = <1>;
  70 +                        #size-cells = <0>;
  71 +                        status = "okay";
  72 +
  73 +                        bmp085: bmp085@77 {
  74 +                                compatible = "bosch,bmp085";
  75 +                                reg = <0x77>;
  76 +                                default-oversampling = <3>;
  77 +                                status = "disable";
  78 +                        };
  79 +
  80 +                        bmp280: bmp280@76 {
  81 +                                compatible = "bosch,bmp280";
  82 +                                reg = <0x76>;
  83 +                                status = "disable";
  84 +                        };
  85 +                };
  86 +        };
  87 +
  88 +       __overrides__ {
  89 +               bmp085 = <&bmp085>,"status";
  90 +               bmp280 = <&bmp280>,"status";
  91 +       };
  92 +};