bcm27xx: add support for linux v5.15

Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B

Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 63 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0657-mfd-simple-mfd-i2c-Add-configuration-for-RPi-POE-HAT.patch b/target/linux/bcm27xx/patches-5.15/950-0657-mfd-simple-mfd-i2c-Add-configuration-for-RPi-POE-HAT.patch
new file mode 100644
index 0000000000..41ac28a673
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0657-mfd-simple-mfd-i2c-Add-configuration-for-RPi-POE-HAT.patch
@@ -0,0 +1,63 @@
+From 6a08616a30213fd40a17c38c63de4b9c9503a537 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Wed, 19 Jan 2022 17:22:57 +0000
+Subject: [PATCH] mfd: simple-mfd-i2c: Add configuration for RPi POE
+ HAT
+
+The Raspbery Pi PoE+ HAT exposes a fan controller and power
+supply status reporting via a single I2C address.
+
+Create an MFD device that allows loading of the relevant
+sub-drivers, with a shared I2C regmap.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/mfd/Kconfig          | 10 ++++++++++
+ drivers/mfd/simple-mfd-i2c.c | 10 ++++++++++
+ 2 files changed, 20 insertions(+)
+
+--- a/drivers/mfd/Kconfig
++++ b/drivers/mfd/Kconfig
+@@ -1093,6 +1093,16 @@ config MFD_SPMI_PMIC
+ 	  Say M here if you want to include support for the SPMI PMIC
+ 	  series as a module.  The module will be called "qcom-spmi-pmic".
+ 
++config MFD_RASPBERRYPI_POE_HAT
++	tristate "Raspberry Pi PoE HAT MFD"
++	depends on I2C
++	select MFD_SIMPLE_MFD_I2C
++	help
++	  This module supports the PWM fan controller found on the Raspberry Pi
++	  POE and POE+ HAT boards, and the power supply driver on the POE+ HAT.
++	  (Functionally it relies on MFD_SIMPLE_MFD_I2C to provide the framework
++	  that loads the child drivers).
++
+ config MFD_RDC321X
+ 	tristate "RDC R-321x southbridge"
+ 	select MFD_CORE
+--- a/drivers/mfd/simple-mfd-i2c.c
++++ b/drivers/mfd/simple-mfd-i2c.c
+@@ -29,6 +29,15 @@ static const struct regmap_config regmap
+ 	.val_bits = 8,
+ };
+ 
++static const struct regmap_config regmap_config_16r_8v = {
++	.reg_bits = 16,
++	.val_bits = 8,
++};
++
++static const struct simple_mfd_data rpi_poe_core = {
++	.regmap_config = &regmap_config_16r_8v,
++};
++
+ static int simple_mfd_i2c_probe(struct i2c_client *i2c)
+ {
+ 	const struct simple_mfd_data *simple_mfd_data;
+@@ -64,6 +73,7 @@ static int simple_mfd_i2c_probe(struct i
+ 
+ static const struct of_device_id simple_mfd_i2c_of_match[] = {
+ 	{ .compatible = "kontron,sl28cpld" },
++	{ .compatible = "raspberrypi,poe-core", &rpi_poe_core },
+ 	{}
+ };
+ MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);