target/linux/brcm2708/patches-4.1/0090-i2c-bcm2708-BCM270X_DT-Add-support-for-I2C2.patch

   1 From f40ed032e6f0892778bac7d33d45593c0483628b Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 22 Jun 2015 14:23:03 +0100
   4 Subject: [PATCH 090/121] i2c-bcm2708/BCM270X_DT: Add support for I2C2
   5
   6 The third I2C bus (I2C2) is normally reserved for HDMI use. Careless
   7 use of this bus can break an attached display - use with caution.
   8
   9 It is recommended to disable accesses by VideoCore by setting
  10 hdmi_ignore_edid=1 or hdmi_edid_file=1 in config.txt.
  11
  12 The interface is disabled by default - enable using the
  13 i2c2_iknowwhatimdoing DT parameter.
  14 ---
  15  arch/arm/boot/dts/bcm2708-rpi-b-plus.dts |  6 ++++++
  16  arch/arm/boot/dts/bcm2708-rpi-b.dts      |  6 ++++++
  17  arch/arm/boot/dts/bcm2708-rpi-cm.dts     |  6 ++++++
  18  arch/arm/boot/dts/bcm2708_common.dtsi    | 14 ++++++++++++++
  19  arch/arm/boot/dts/bcm2709-rpi-2-b.dts    |  6 ++++++
  20  drivers/i2c/busses/i2c-bcm2708.c         |  5 ++++-
  21  6 files changed, 42 insertions(+), 1 deletion(-)
  22
  23 --- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
  24 +++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
  25 @@ -75,6 +75,10 @@
  26         clock-frequency = <100000>;
  27  };
  28
  29 +&i2c2 {
  30 +       clock-frequency = <100000>;
  31 +};
  32 +
  33  &i2s {
  34         #sound-dai-cells = <0>;
  35         pinctrl-names = "default";
  36 @@ -103,8 +107,10 @@
  37                 spi = <&spi0>,"status";
  38                 i2c0 = <&i2c0>,"status";
  39                 i2c1 = <&i2c1>,"status";
  40 +               i2c2_iknowwhatimdoing = <&i2c2>,"status";
  41                 i2c0_baudrate = <&i2c0>,"clock-frequency:0";
  42                 i2c1_baudrate = <&i2c1>,"clock-frequency:0";
  43 +               i2c2_baudrate = <&i2c2>,"clock-frequency:0";
  44                 core_freq = <&clk_core>,"clock-frequency:0";
  45
  46                 act_led_gpio = <&act_led>,"gpios:4";
  47 --- a/arch/arm/boot/dts/bcm2708-rpi-b.dts
  48 +++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts
  49 @@ -75,6 +75,10 @@
  50         clock-frequency = <100000>;
  51  };
  52
  53 +&i2c2 {
  54 +       clock-frequency = <100000>;
  55 +};
  56 +
  57  &i2s {
  58         #sound-dai-cells = <0>;
  59         pinctrl-names = "default";
  60 @@ -97,8 +101,10 @@
  61                 spi = <&spi0>,"status";
  62                 i2c0 = <&i2c0>,"status";
  63                 i2c1 = <&i2c1>,"status";
  64 +               i2c2_iknowwhatimdoing = <&i2c2>,"status";
  65                 i2c0_baudrate = <&i2c0>,"clock-frequency:0";
  66                 i2c1_baudrate = <&i2c1>,"clock-frequency:0";
  67 +               i2c2_baudrate = <&i2c2>,"clock-frequency:0";
  68                 core_freq = <&clk_core>,"clock-frequency:0";
  69
  70                 act_led_gpio = <&act_led>,"gpios:4";
  71 --- a/arch/arm/boot/dts/bcm2708-rpi-cm.dts
  72 +++ b/arch/arm/boot/dts/bcm2708-rpi-cm.dts
  73 @@ -65,6 +65,10 @@
  74         clock-frequency = <100000>;
  75  };
  76
  77 +&i2c2 {
  78 +       clock-frequency = <100000>;
  79 +};
  80 +
  81  &i2s {
  82         #sound-dai-cells = <0>;
  83         pinctrl-names = "default";
  84 @@ -79,8 +83,10 @@
  85                 spi = <&spi0>,"status";
  86                 i2c0 = <&i2c0>,"status";
  87                 i2c1 = <&i2c1>,"status";
  88 +               i2c2_iknowwhatimdoing = <&i2c2>,"status";
  89                 i2c0_baudrate = <&i2c0>,"clock-frequency:0";
  90                 i2c1_baudrate = <&i2c1>,"clock-frequency:0";
  91 +               i2c2_baudrate = <&i2c2>,"clock-frequency:0";
  92                 core_freq = <&clk_core>,"clock-frequency:0";
  93         };
  94  };
  95 --- a/arch/arm/boot/dts/bcm2708_common.dtsi
  96 +++ b/arch/arm/boot/dts/bcm2708_common.dtsi
  97 @@ -20,6 +20,7 @@
  98                 uart1 = &uart1;
  99                 mmc = &mmc;
 100                 i2c1 = &i2c1;
 101 +               i2c2 = &i2c2;
 102                 usb = &usb;
 103                 leds = &leds;
 104                 fb = &fb;
 105 @@ -179,6 +180,19 @@
 106                         interrupts = <2 21>;
 107                         clocks = <&clk_i2c>;
 108                         #address-cells = <1>;
 109 +                       #size-cells = <0>;
 110 +                       status = "disabled";
 111 +               };
 112 +
 113 +               i2c2: i2c@7e805000 {
 114 +                       // Beware - this is shared with the HDMI module.
 115 +                       // Careless use may break (really) your display.
 116 +                       // Caveat emptor.
 117 +                       compatible = "brcm,bcm2708-i2c";
 118 +                       reg = <0x7e805000 0x1000>;
 119 +                       interrupts = <2 21>;
 120 +                       clocks = <&clk_i2c>;
 121 +                       #address-cells = <1>;
 122                         #size-cells = <0>;
 123                         status = "disabled";
 124                 };
 125 --- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
 126 +++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
 127 @@ -75,6 +75,10 @@
 128         clock-frequency = <100000>;
 129  };
 130
 131 +&i2c2 {
 132 +       clock-frequency = <100000>;
 133 +};
 134 +
 135  &i2s {
 136         #sound-dai-cells = <0>;
 137         pinctrl-names = "default";
 138 @@ -103,8 +107,10 @@
 139                 spi = <&spi0>,"status";
 140                 i2c0 = <&i2c0>,"status";
 141                 i2c1 = <&i2c1>,"status";
 142 +               i2c2_iknowwhatimdoing = <&i2c2>,"status";
 143                 i2c0_baudrate = <&i2c0>,"clock-frequency:0";
 144                 i2c1_baudrate = <&i2c1>,"clock-frequency:0";
 145 +               i2c2_baudrate = <&i2c2>,"clock-frequency:0";
 146                 core_freq = <&clk_core>,"clock-frequency:0";
 147
 148                 act_led_gpio = <&act_led>,"gpios:4";
 149 --- a/drivers/i2c/busses/i2c-bcm2708.c
 150 +++ b/drivers/i2c/busses/i2c-bcm2708.c
 151 @@ -407,8 +407,11 @@ static int bcm2708_i2c_probe(struct plat
 152         case 1:
 153                 adap->class = I2C_CLASS_DDC;
 154                 break;
 155 +       case 2:
 156 +               adap->class = I2C_CLASS_DDC;
 157 +               break;
 158         default:
 159 -               dev_err(&pdev->dev, "can only bind to BSC 0 or 1\n");
 160 +               dev_err(&pdev->dev, "can only bind to BSC 0, 1 or 2\n");
 161                 err = -ENXIO;
 162                 goto out_free_bi;
 163         }