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

   1 From aa4a0729c4e6f94fde5281d6454342bbd4fc69e1 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Wed, 19 Jan 2022 17:22:57 +0000
   4 Subject: [PATCH] mfd: simple-mfd-i2c: Add configuration for RPi POE
   5  HAT
   6
   7 The Raspbery Pi PoE+ HAT exposes a fan controller and power
   8 supply status reporting via a single I2C address.
   9
  10 Create an MFD device that allows loading of the relevant
  11 sub-drivers, with a shared I2C regmap.
  12
  13 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  14 ---
  15  drivers/mfd/Kconfig          | 10 ++++++++++
  16  drivers/mfd/simple-mfd-i2c.c | 10 ++++++++++
  17  2 files changed, 20 insertions(+)
  18
  19 --- a/drivers/mfd/Kconfig
  20 +++ b/drivers/mfd/Kconfig
  21 @@ -1152,6 +1152,16 @@ config MFD_SY7636A
  22           To enable support for building sub-devices as modules,
  23           choose M here.
  24
  25 +config MFD_RASPBERRYPI_POE_HAT
  26 +       tristate "Raspberry Pi PoE HAT MFD"
  27 +       depends on I2C
  28 +       select MFD_SIMPLE_MFD_I2C
  29 +       help
  30 +         This module supports the PWM fan controller found on the Raspberry Pi
  31 +         POE and POE+ HAT boards, and the power supply driver on the POE+ HAT.
  32 +         (Functionally it relies on MFD_SIMPLE_MFD_I2C to provide the framework
  33 +         that loads the child drivers).
  34 +
  35  config MFD_RDC321X
  36         tristate "RDC R-321x southbridge"
  37         select MFD_CORE
  38 --- a/drivers/mfd/simple-mfd-i2c.c
  39 +++ b/drivers/mfd/simple-mfd-i2c.c
  40 @@ -29,6 +29,15 @@ static const struct regmap_config regmap
  41         .val_bits = 8,
  42  };
  43
  44 +static const struct regmap_config regmap_config_16r_8v = {
  45 +       .reg_bits = 16,
  46 +       .val_bits = 8,
  47 +};
  48 +
  49 +static const struct simple_mfd_data rpi_poe_core = {
  50 +       .regmap_config = &regmap_config_16r_8v,
  51 +};
  52 +
  53  static int simple_mfd_i2c_probe(struct i2c_client *i2c)
  54  {
  55         const struct simple_mfd_data *simple_mfd_data;
  56 @@ -75,6 +84,7 @@ static const struct simple_mfd_data sile
  57  static const struct of_device_id simple_mfd_i2c_of_match[] = {
  58         { .compatible = "kontron,sl28cpld" },
  59         { .compatible = "silergy,sy7636a", .data = &silergy_sy7636a},
  60 +       { .compatible = "raspberrypi,poe-core", &rpi_poe_core },
  61         {}
  62  };
  63  MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);