2022-05-16 21:40:32 +00:00
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From 6a08616a30213fd40a17c38c63de4b9c9503a537 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Wed, 19 Jan 2022 17:22:57 +0000
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Subject: [PATCH] mfd: simple-mfd-i2c: Add configuration for RPi POE
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HAT
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The Raspbery Pi PoE+ HAT exposes a fan controller and power
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supply status reporting via a single I2C address.
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Create an MFD device that allows loading of the relevant
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sub-drivers, with a shared I2C regmap.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/mfd/Kconfig | 10 ++++++++++
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drivers/mfd/simple-mfd-i2c.c | 10 ++++++++++
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2 files changed, 20 insertions(+)
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--- a/drivers/mfd/Kconfig
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+++ b/drivers/mfd/Kconfig
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2023-03-12 14:16:50 +00:00
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@@ -1094,6 +1094,16 @@ config MFD_SPMI_PMIC
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2022-05-16 21:40:32 +00:00
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Say M here if you want to include support for the SPMI PMIC
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series as a module. The module will be called "qcom-spmi-pmic".
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+config MFD_RASPBERRYPI_POE_HAT
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+ tristate "Raspberry Pi PoE HAT MFD"
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+ depends on I2C
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+ select MFD_SIMPLE_MFD_I2C
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+ help
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+ This module supports the PWM fan controller found on the Raspberry Pi
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+ POE and POE+ HAT boards, and the power supply driver on the POE+ HAT.
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+ (Functionally it relies on MFD_SIMPLE_MFD_I2C to provide the framework
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+ that loads the child drivers).
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+
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config MFD_RDC321X
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tristate "RDC R-321x southbridge"
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select MFD_CORE
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--- a/drivers/mfd/simple-mfd-i2c.c
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+++ b/drivers/mfd/simple-mfd-i2c.c
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@@ -29,6 +29,15 @@ static const struct regmap_config regmap
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.val_bits = 8,
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};
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+static const struct regmap_config regmap_config_16r_8v = {
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+ .reg_bits = 16,
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+ .val_bits = 8,
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+};
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+
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+static const struct simple_mfd_data rpi_poe_core = {
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+ .regmap_config = ®map_config_16r_8v,
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+};
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+
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static int simple_mfd_i2c_probe(struct i2c_client *i2c)
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{
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const struct simple_mfd_data *simple_mfd_data;
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@@ -64,6 +73,7 @@ static int simple_mfd_i2c_probe(struct i
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static const struct of_device_id simple_mfd_i2c_of_match[] = {
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{ .compatible = "kontron,sl28cpld" },
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+ { .compatible = "raspberrypi,poe-core", &rpi_poe_core },
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{}
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};
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MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);
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