target/linux/brcm2708/patches-4.19/950-0682-overlays-Add-baudrate-parameter-to-i2c3-i2c6.patch

   1 From 114845b6010b6e6a320804f2d86ab4d5dc5a06de Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 5 Aug 2019 14:17:14 +0100
   4 Subject: [PATCH] overlays: Add baudrate parameter to i2c3-i2c6
   5
   6 The overlays for enabling the new BCM2711 I2C interfaces were lacking
   7 the means to configure the baud/clock rate.
   8
   9 Also explictly set the default pins, rather than relying on the values
  10 in the base DTB.
  11
  12 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  13 ---
  14  arch/arm/boot/dts/overlays/README           |  8 ++++++++
  15  arch/arm/boot/dts/overlays/i2c3-overlay.dts | 15 ++++++++++++---
  16  arch/arm/boot/dts/overlays/i2c4-overlay.dts | 15 ++++++++++++---
  17  arch/arm/boot/dts/overlays/i2c5-overlay.dts | 15 ++++++++++++---
  18  arch/arm/boot/dts/overlays/i2c6-overlay.dts | 15 ++++++++++++---
  19  5 files changed, 56 insertions(+), 12 deletions(-)
  20
  21 --- a/arch/arm/boot/dts/overlays/README
  22 +++ b/arch/arm/boot/dts/overlays/README
  23 @@ -1221,6 +1221,8 @@ Info:   Enable the i2c3 bus
  24  Load:   dtoverlay=i2c3,<param>
  25  Params: pins_2_3                Use GPIOs 2 and 3
  26          pins_4_5                Use GPIOs 4 and 5 (default)
  27 +        baudrate                Set the baudrate for the interface (default
  28 +                                "100000")
  29
  30
  31  Name:   i2c4
  32 @@ -1228,6 +1230,8 @@ Info:   Enable the i2c4 bus
  33  Load:   dtoverlay=i2c4,<param>
  34  Params: pins_6_7                Use GPIOs 6 and 7
  35          pins_8_9                Use GPIOs 8 and 9 (default)
  36 +        baudrate                Set the baudrate for the interface (default
  37 +                                "100000")
  38
  39
  40  Name:   i2c5
  41 @@ -1235,6 +1239,8 @@ Info:   Enable the i2c5 bus
  42  Load:   dtoverlay=i2c5,<param>
  43  Params: pins_10_11              Use GPIOs 10 and 11
  44          pins_12_13              Use GPIOs 12 and 13 (default)
  45 +        baudrate                Set the baudrate for the interface (default
  46 +                                "100000")
  47
  48
  49  Name:   i2c6
  50 @@ -1242,6 +1248,8 @@ Info:   Enable the i2c6 bus
  51  Load:   dtoverlay=i2c6,<param>
  52  Params: pins_0_1                Use GPIOs 0 and 1
  53          pins_22_23              Use GPIOs 22 and 23 (default)
  54 +        baudrate                Set the baudrate for the interface (default
  55 +                                "100000")
  56
  57
  58  Name:   i2s-gpio28-31
  59 --- a/arch/arm/boot/dts/overlays/i2c3-overlay.dts
  60 +++ b/arch/arm/boot/dts/overlays/i2c3-overlay.dts
  61 @@ -6,10 +6,11 @@
  62
  63         fragment@0 {
  64                 target = <&i2c3>;
  65 -               __overlay__ {
  66 +               frag0: __overlay__ {
  67                         status = "okay";
  68                         pinctrl-names = "default";
  69                         pinctrl-0 = <&i2c3_pins>;
  70 +                       clock-frequency = <100000>;
  71                 };
  72         };
  73
  74 @@ -20,8 +21,16 @@
  75                 };
  76         };
  77
  78 +       fragment@2 {
  79 +               target = <&i2c3_pins>;
  80 +               __overlay__ {
  81 +                       brcm,pins = <4 5>;
  82 +               };
  83 +       };
  84 +
  85         __overrides__ {
  86 -               pins_2_3 = <0>,"=1";
  87 -               pins_4_5 = <0>,"!1";
  88 +               pins_2_3 = <0>,"=1!2";
  89 +               pins_4_5 = <0>,"!1=2";
  90 +               baudrate = <&frag0>, "clock-frequency:0";
  91         };
  92  };
  93 --- a/arch/arm/boot/dts/overlays/i2c4-overlay.dts
  94 +++ b/arch/arm/boot/dts/overlays/i2c4-overlay.dts
  95 @@ -6,10 +6,11 @@
  96
  97         fragment@0 {
  98                 target = <&i2c4>;
  99 -               __overlay__ {
 100 +               frag0: __overlay__ {
 101                         status = "okay";
 102                         pinctrl-names = "default";
 103                         pinctrl-0 = <&i2c4_pins>;
 104 +                       clock-frequency = <100000>;
 105                 };
 106         };
 107
 108 @@ -20,8 +21,16 @@
 109                 };
 110         };
 111
 112 +       fragment@2 {
 113 +               target = <&i2c4_pins>;
 114 +               __overlay__ {
 115 +                       brcm,pins = <8 9>;
 116 +               };
 117 +       };
 118 +
 119         __overrides__ {
 120 -               pins_6_7 = <0>,"=1";
 121 -               pins_8_9 = <0>,"!1";
 122 +               pins_6_7 = <0>,"=1!2";
 123 +               pins_8_9 = <0>,"!1=2";
 124 +               baudrate = <&frag0>, "clock-frequency:0";
 125         };
 126  };
 127 --- a/arch/arm/boot/dts/overlays/i2c5-overlay.dts
 128 +++ b/arch/arm/boot/dts/overlays/i2c5-overlay.dts
 129 @@ -6,10 +6,11 @@
 130
 131         fragment@0 {
 132                 target = <&i2c5>;
 133 -               __overlay__ {
 134 +               frag0: __overlay__ {
 135                         status = "okay";
 136                         pinctrl-names = "default";
 137                         pinctrl-0 = <&i2c5_pins>;
 138 +                       clock-frequency = <100000>;
 139                 };
 140         };
 141
 142 @@ -20,8 +21,16 @@
 143                 };
 144         };
 145
 146 +       fragment@2 {
 147 +               target = <&i2c5_pins>;
 148 +               __overlay__ {
 149 +                       brcm,pins = <12 13>;
 150 +               };
 151 +       };
 152 +
 153         __overrides__ {
 154 -               pins_10_11 = <0>,"=1";
 155 -               pins_12_13 = <0>,"!1";
 156 +               pins_10_11 = <0>,"=1!2";
 157 +               pins_12_13 = <0>,"!1=2";
 158 +               baudrate = <&frag0>, "clock-frequency:0";
 159         };
 160  };
 161 --- a/arch/arm/boot/dts/overlays/i2c6-overlay.dts
 162 +++ b/arch/arm/boot/dts/overlays/i2c6-overlay.dts
 163 @@ -6,10 +6,11 @@
 164
 165         fragment@0 {
 166                 target = <&i2c6>;
 167 -               __overlay__ {
 168 +               frag0: __overlay__ {
 169                         status = "okay";
 170                         pinctrl-names = "default";
 171                         pinctrl-0 = <&i2c6_pins>;
 172 +                       clock-frequency = <100000>;
 173                 };
 174         };
 175
 176 @@ -20,8 +21,16 @@
 177                 };
 178         };
 179
 180 +       fragment@2 {
 181 +               target = <&i2c6_pins>;
 182 +               __overlay__ {
 183 +                       brcm,pins = <22 23>;
 184 +               };
 185 +       };
 186 +
 187         __overrides__ {
 188 -               pins_0_1 = <0>,"=1";
 189 -               pins_22_23 = <0>,"!1";
 190 +               pins_0_1 = <0>,"=1!2";
 191 +               pins_22_23 = <0>,"!1=2";
 192 +               baudrate = <&frag0>, "clock-frequency:0";
 193         };
 194  };