target/linux/brcm2708/patches-4.4/0231-RPi-config-Add-CONFIG_PWM_PCA9685-for-NXP-PCA9685-dr.patch

   1 From da8208f8af795b0696e591bd85bedf2990775451 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <6by9@users.noreply.github.com>
   3 Date: Fri, 1 Apr 2016 15:28:46 +0100
   4 Subject: [PATCH] RPi config: Add CONFIG_PWM_PCA9685 for NXP PCA9685 driver
   5  over I2C
   6
   7 Includes DT overlay to configure it.
   8
   9 Signed-off-by: Dave Stevenson <6by9@users.noreply.github.com>
  10 ---
  11  arch/arm/boot/dts/overlays/Makefile                |  1 +
  12  arch/arm/boot/dts/overlays/README                  |  6 +++++
  13  .../boot/dts/overlays/i2c-pwm-pca9685a-overlay.dts | 26 ++++++++++++++++++++++
  14  arch/arm/configs/bcm2709_defconfig                 |  1 +
  15  arch/arm/configs/bcmrpi_defconfig                  |  1 +
  16  5 files changed, 35 insertions(+)
  17  create mode 100644 arch/arm/boot/dts/overlays/i2c-pwm-pca9685a-overlay.dts
  18
  19 --- a/arch/arm/boot/dts/overlays/Makefile
  20 +++ b/arch/arm/boot/dts/overlays/Makefile
  21 @@ -30,6 +30,7 @@ dtbo-$(RPI_DT_OVERLAYS) += hy28b.dtbo
  22  dtbo-$(RPI_DT_OVERLAYS) += i2c-rtc.dtbo
  23  dtbo-$(RPI_DT_OVERLAYS) += i2c-gpio.dtbo
  24  dtbo-$(RPI_DT_OVERLAYS) += i2c-mux-pca9548a.dtbo
  25 +dtbo-$(RPI_DT_OVERLAYS) += i2c-pwm-pca9685a.dtbo
  26  dtbo-$(RPI_DT_OVERLAYS) += i2c0-bcm2708.dtbo
  27  dtbo-$(RPI_DT_OVERLAYS) += i2c1-bcm2708.dtbo
  28  dtbo-$(RPI_DT_OVERLAYS) += i2s-mmap.dtbo
  29 --- a/arch/arm/boot/dts/overlays/README
  30 +++ b/arch/arm/boot/dts/overlays/README
  31 @@ -366,6 +366,12 @@ Load:   dtoverlay=i2c-mux-pca9548a,<para
  32  Params: addr                    I2C address of PCA9548A (default 0x70)
  33
  34
  35 +Name:   i2c-pwm-pca9685a
  36 +Info:   Adds support for an NXP PCA9685A I2C PWM controller on i2c_arm
  37 +Load:   dtoverlay=i2c-pwm-pca9685a,<param>=<val>
  38 +Params: addr                    I2C address of PCA9685A (default 0x40)
  39 +
  40 +
  41  Name:   i2c-rtc
  42  Info:   Adds support for a number of I2C Real Time Clock devices
  43  Load:   dtoverlay=i2c-rtc,<param>=<val>
  44 --- /dev/null
  45 +++ b/arch/arm/boot/dts/overlays/i2c-pwm-pca9685a-overlay.dts
  46 @@ -0,0 +1,26 @@
  47 +// Definitions for NXP PCA9685A I2C PWM controller on ARM I2C bus.
  48 +/dts-v1/;
  49 +/plugin/;
  50 +
  51 +/{
  52 +       compatible = "brcm,bcm2708";
  53 +
  54 +       fragment@0 {
  55 +               target = <&i2c_arm>;
  56 +               __overlay__ {
  57 +                       #address-cells = <1>;
  58 +                       #size-cells = <0>;
  59 +                       status = "okay";
  60 +
  61 +                       pca: pca@40 {
  62 +                               compatible = "nxp,pca9685";
  63 +                               #pwm-cells = <2>;
  64 +                               reg = <0x40>;
  65 +                               status = "okay";
  66 +                       };
  67 +               };
  68 +       };
  69 +       __overrides__ {
  70 +               addr = <&pca>,"reg:0";
  71 +       };
  72 +};
  73 --- a/arch/arm/configs/bcm2709_defconfig
  74 +++ b/arch/arm/configs/bcm2709_defconfig
  75 @@ -1122,6 +1122,7 @@ CONFIG_MCP320X=m
  76  CONFIG_MCP3422=m
  77  CONFIG_DHT11=m
  78  CONFIG_PWM_BCM2835=m
  79 +CONFIG_PWM_PCA9685=m
  80  CONFIG_RASPBERRYPI_FIRMWARE=y
  81  CONFIG_EXT4_FS=y
  82  CONFIG_EXT4_FS_POSIX_ACL=y
  83 --- a/arch/arm/configs/bcmrpi_defconfig
  84 +++ b/arch/arm/configs/bcmrpi_defconfig
  85 @@ -1129,6 +1129,7 @@ CONFIG_MCP320X=m
  86  CONFIG_MCP3422=m
  87  CONFIG_DHT11=m
  88  CONFIG_PWM_BCM2835=m
  89 +CONFIG_PWM_PCA9685=m
  90  CONFIG_RASPBERRYPI_FIRMWARE=y
  91  CONFIG_EXT4_FS=y
  92  CONFIG_EXT4_FS_POSIX_ACL=y