bcm27xx: add kernel 5.10 support

Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted
patches, wireless patches and defconfig patches.

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 4B v1.1 4G
bcm2711: boot tested on RPi 4B v1.1 4G

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

1 files changed, 102 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0373-overlays-Add-MAX31856-support-to-maxtherm-overlay.patch b/target/linux/bcm27xx/patches-5.10/950-0373-overlays-Add-MAX31856-support-to-maxtherm-overlay.patch
new file mode 100644
index 0000000000..e7e6ee0bd8
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0373-overlays-Add-MAX31856-support-to-maxtherm-overlay.patch
@@ -0,0 +1,102 @@
+From 9444edfa8b5b18f8727b82853dd50345a400a316 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Thu, 22 Oct 2020 17:11:12 +0100
+Subject: [PATCH] overlays: Add MAX31856 support to maxtherm overlay
+
+Extend the maxtherm overlay with support for the MAX31856.
+The driver reads the thermocouple type from a property, which is much
+more civilised.
+
+See: https://github.com/raspberrypi/linux/issues/3915
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/overlays/README             | 18 ++++++++++++-----
+ .../boot/dts/overlays/maxtherm-overlay.dts    | 20 +++++++++++++++++++
+ 2 files changed, 33 insertions(+), 5 deletions(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1666,20 +1666,19 @@ Params: no-sdmode               Driver d
+ 
+ 
+ Name:   maxtherm
+-Info:   Configure a MAX6675 or MAX31855 thermocouple as an IIO device.
++Info:   Configure a MAX6675, MAX31855 or MAX31856 thermocouple as an IIO device.
+ 
+         For devices on spi1 or spi2, the interfaces should be enabled
+         with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays.
+         The overlay expects to disable the relevant spidev node, so also using
+         e.g. cs0_spidev=off is unnecessary.
+ 
+-        Note:   with the 5.7 kernel (and later) there will also be
+-                overlays for MAX31855E, MAX31855J, MAX31855K,
+-                MAX31885N, MAX31855R, MAX31855S and MAX31855T.
+-
+         Example:
+         MAX31855 on /dev/spidev0.0
+             dtoverlay=maxtherm,spi0-0,max31855
++        MAX31856 using a type J thermocouple on /dev/spidev2.1
++            dtoverlay=spi2-2cs
++            dtoverlay=maxtherm,spi2-1,max31856,type_j
+ 
+ Load:   dtoverlay=maxtherm,<param>=<val>
+ Params: spi<n>-<m>              Configure device at spi<n>, cs<m>
+@@ -1693,6 +1692,15 @@ Params: spi<n>-<m>              Configur
+         max31855r               Enable support for the MAX31855R
+         max31855s               Enable support for the MAX31855S
+         max31855t               Enable support for the MAX31855T
++        max31856                Enable support for the MAX31856 (with type K)
++        type_b                  Select a type B sensor for max31856
++        type_e                  Select a type E sensor for max31856
++        type_j                  Select a type J sensor for max31856
++        type_k                  Select a type K sensor for max31856
++        type_n                  Select a type N sensor for max31856
++        type_r                  Select a type R sensor for max31856
++        type_s                  Select a type S sensor for max31856
++        type_t                  Select a type T sensor for max31856
+ 
+ 
+ Name:   mbed-dac
+--- a/arch/arm/boot/dts/overlays/maxtherm-overlay.dts
++++ b/arch/arm/boot/dts/overlays/maxtherm-overlay.dts
+@@ -5,6 +5,8 @@
+ /dts-v1/;
+ /plugin/;
+ 
++#include <dt-bindings/iio/temperature/thermocouple.h>
++
+ / {
+ 	compatible = "brcm,bcm2835";
+ 
+@@ -128,6 +130,15 @@
+ 		};
+ 	};
+ 
++	fragment@16 {
++		target = <&max>;
++		__dormant__ {
++			compatible = "maxim,max31856";
++			spi-cpha;
++			thermocouple-type = <THERMOCOUPLE_TYPE_K>;
++		};
++	};
++
+ 	__overrides__ {
+ 		spi0-0 = <0>, "+0",
+ 			 <&maxfrag>,"target:0=",<&spi0>,
+@@ -162,5 +173,14 @@
+ 		max31855r = <0>,"+13";
+ 		max31855s = <0>,"+14";
+ 		max31855t = <0>,"+15";
++		max31856  = <0>,"+16";
++		type_b    = <&max>,"thermocouple-type:0=",<THERMOCOUPLE_TYPE_B>;
++		type_e    = <&max>,"thermocouple-type:0=",<THERMOCOUPLE_TYPE_E>;
++		type_j    = <&max>,"thermocouple-type:0=",<THERMOCOUPLE_TYPE_J>;
++		type_k    = <&max>,"thermocouple-type:0=",<THERMOCOUPLE_TYPE_K>;
++		type_n    = <&max>,"thermocouple-type:0=",<THERMOCOUPLE_TYPE_N>;
++		type_r    = <&max>,"thermocouple-type:0=",<THERMOCOUPLE_TYPE_R>;
++		type_s    = <&max>,"thermocouple-type:0=",<THERMOCOUPLE_TYPE_S>;
++		type_t    = <&max>,"thermocouple-type:0=",<THERMOCOUPLE_TYPE_T>;
+ 	};
+ };