target/linux/brcm2708/patches-4.14/950-0227-overlays-Add-sc16is752-i2c-overlay.patch

   1 From c286380fe677e404af0a1226c6589b3f24fafc6c Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Tue, 20 Feb 2018 17:32:02 +0000
   4 Subject: [PATCH 227/454] overlays: Add sc16is752-i2c overlay
   5
   6 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
   7 ---
   8  arch/arm/boot/dts/overlays/Makefile           |  1 +
   9  arch/arm/boot/dts/overlays/README             | 15 +++++--
  10  .../dts/overlays/sc16is752-i2c-overlay.dts    | 40 +++++++++++++++++++
  11  3 files changed, 53 insertions(+), 3 deletions(-)
  12  create mode 100644 arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
  13
  14 --- a/arch/arm/boot/dts/overlays/Makefile
  15 +++ b/arch/arm/boot/dts/overlays/Makefile
  16 @@ -100,6 +100,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  17         rpi-tv.dtbo \
  18         rra-digidac1-wm8741-audio.dtbo \
  19         sc16is750-i2c.dtbo \
  20 +       sc16is752-i2c.dtbo \
  21         sc16is752-spi1.dtbo \
  22         sdhost.dtbo \
  23         sdio.dtbo \
  24 --- a/arch/arm/boot/dts/overlays/README
  25 +++ b/arch/arm/boot/dts/overlays/README
  26 @@ -1447,14 +1447,23 @@ Params: <None>
  27
  28  Name:   sc16is750-i2c
  29  Info:   Overlay for the NXP SC16IS750 UART with I2C Interface
  30 -        Enables the chip on I2C1 at 0x48. To select another address,
  31 -        please refer to table 10 in reference manual.
  32 -
  33 +        Enables the chip on I2C1 at 0x48 (or the "addr" parameter value). To
  34 +        select another address, please refer to table 10 in reference manual.
  35  Load:   dtoverlay=sc16is750-i2c,<param>=<val>
  36  Params: int_pin                 GPIO used for IRQ (default 24)
  37          addr                    Address (default 0x48)
  38
  39
  40 +Name:   sc16is752-i2c
  41 +Info:   Overlay for the NXP SC16IS752 dual UART with I2C Interface
  42 +        Enables the chip on I2C1 at 0x48 (or the "addr" parameter value). To
  43 +        select another address, please refer to table 10 in reference manual.
  44 +Load:   dtoverlay=sc16is752-i2c,<param>=<val>
  45 +Params: int_pin                 GPIO used for IRQ (default 24)
  46 +        addr                    Address (default 0x48)
  47 +        xtal                    On-board crystal frequency (default 14745600)
  48 +
  49 +
  50  Name:   sc16is752-spi1
  51  Info:   Overlay for the NXP SC16IS752 Dual UART with SPI Interface
  52          Enables the chip on SPI1.
  53 --- /dev/null
  54 +++ b/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
  55 @@ -0,0 +1,40 @@
  56 +/dts-v1/;
  57 +/plugin/;
  58 +
  59 +/ {
  60 +       compatible = "brcm,bcm2835";
  61 +
  62 +       fragment@0 {
  63 +               target = <&i2c1>;
  64 +
  65 +               frag1: __overlay__ {
  66 +                       #address-cells = <1>;
  67 +                       #size-cells = <0>;
  68 +                       status = "okay";
  69 +
  70 +                       sc16is752: sc16is752@48 {
  71 +                               compatible = "nxp,sc16is752";
  72 +                               reg = <0x48>; // i2c address
  73 +                               clocks = <&sc16is752_clk>;
  74 +                               interrupt-parent = <&gpio>;
  75 +                               interrupts = <24 0x2>; /* IRQ_TYPE_EDGE_FALLING */
  76 +                               gpio-controller;
  77 +                               #gpio-cells = <0>;
  78 +                               i2c-max-frequency = <400000>;
  79 +                               status = "okay";
  80 +
  81 +                               sc16is752_clk: sc16is752_clk {
  82 +                                       compatible = "fixed-clock";
  83 +                                       #clock-cells = <0>;
  84 +                                       clock-frequency = <14745600>;
  85 +                               };
  86 +                       };
  87 +               };
  88 +       };
  89 +
  90 +       __overrides__ {
  91 +               int_pin = <&sc16is752>,"interrupts:0";
  92 +               addr = <&sc16is752>,"reg:0";
  93 +               xtal = <&sc16is752>,"clock-frequency:0";
  94 +       };
  95 +};