git.openwrt.org Git - openwrt/staging/linusw.git/blob

   1 From de7880016665afe7fa7d40e1fafa859260d53ba1 Mon Sep 17 00:00:00 2001
   2 From: Christian Lamparter <chunkeey@gmail.com>
   3 Date: Thu, 28 Oct 2021 09:03:44 +0200
   4 Subject: [PATCH] ARM: BCM53016: MR32: convert to Broadcom iProc I2C Driver
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 replaces the bit-banged i2c-gpio provided i2c functionality
  10 with the hardware in the SoC.
  11
  12 During review of the MR32, Florian Fainelli pointed out that the
  13 SoC has a real I2C-controller. Furthermore, the connected pins
  14 (SDA and SCL) would line up perfectly for use. Back then I couldn't
  15 get it working though and I left it with i2c-gpio (which worked).
  16
  17 Now we know the reason: the interrupt was incorrectly specified.
  18 (Hence, this patch depends on Florian Fainelli's
  19 "ARM: dts: BCM5301X: Fix I2C controller interrupt" patch).
  20
  21 Cc: Florian Fainelli <f.fainelli@gmail.com>
  22 Cc: Rafał Miłecki <zajec5@gmail.com>
  23 Cc: Matthew Hagan <mnhagan88@gmail.com>
  24 Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
  25 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  26 ---
  27  arch/arm/boot/dts/bcm53016-meraki-mr32.dts | 62 ++++++++++------------
  28  1 file changed, 28 insertions(+), 34 deletions(-)
  29
  30 --- a/arch/arm/boot/dts/bcm53016-meraki-mr32.dts
  31 +++ b/arch/arm/boot/dts/bcm53016-meraki-mr32.dts
  32 @@ -84,40 +84,6 @@
  33                         max-brightness = <255>;
  34                 };
  35         };
  36 -
  37 -       i2c {
  38 -               /*
  39 -                * The platform provided I2C does not budge.
  40 -                * This is a replacement until I can figure
  41 -                * out what are the missing bits...
  42 -                */
  43 -
  44 -               compatible = "i2c-gpio";
  45 -               sda-gpios = <&chipcommon 5 GPIO_ACTIVE_HIGH>;
  46 -               scl-gpios = <&chipcommon 4 GPIO_ACTIVE_HIGH>;
  47 -               i2c-gpio,delay-us = <10>; /* close to 100 kHz */
  48 -               #address-cells = <1>;
  49 -               #size-cells = <0>;
  50 -
  51 -               current_sense: ina219@45 {
  52 -                       compatible = "ti,ina219";
  53 -                       reg = <0x45>;
  54 -                       shunt-resistor = <60000>; /* = 60 mOhms */
  55 -               };
  56 -
  57 -               eeprom: eeprom@50 {
  58 -                       compatible = "atmel,24c64";
  59 -                       reg = <0x50>;
  60 -                       pagesize = <32>;
  61 -                       read-only;
  62 -                       #address-cells = <1>;
  63 -                       #size-cells = <1>;
  64 -
  65 -                       mac_address: mac-address@66 {
  66 -                               reg = <0x66 0x6>;
  67 -                       };
  68 -               };
  69 -       };
  70  };
  71
  72  &uart0 {
  73 @@ -228,3 +194,31 @@
  74                 };
  75         };
  76  };
  77 +
  78 +&i2c0 {
  79 +       status = "okay";
  80 +
  81 +       pinctrl-names = "default";
  82 +       pinctrl-0 = <&pinmux_i2c>;
  83 +
  84 +       clock-frequency = <100000>;
  85 +
  86 +       current_sense: ina219@45 {
  87 +               compatible = "ti,ina219";
  88 +               reg = <0x45>;
  89 +               shunt-resistor = <60000>; /* = 60 mOhms */
  90 +       };
  91 +
  92 +       eeprom: eeprom@50 {
  93 +               compatible = "atmel,24c64";
  94 +               reg = <0x50>;
  95 +               pagesize = <32>;
  96 +               read-only;
  97 +               #address-cells = <1>;
  98 +               #size-cells = <1>;
  99 +
 100 +               mac_address: mac-address@66 {
 101 +                       reg = <0x66 0x6>;
 102 +               };
 103 +       };
 104 +};