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, 100 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0698-overlays-Add-overlay-for-Si446x-Transceiver-SPI.patch b/target/linux/bcm27xx/patches-5.10/950-0698-overlays-Add-overlay-for-Si446x-Transceiver-SPI.patch
new file mode 100644
index 0000000000..34effa3a32
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0698-overlays-Add-overlay-for-Si446x-Transceiver-SPI.patch
@@ -0,0 +1,100 @@
+From 7f747c53fc4afa9a25eeb3ca290b4fed4690ca3f Mon Sep 17 00:00:00 2001
+From: "Sunip K. Mukherjee" <sunipkmukherjee@gmail.com>
+Date: Sun, 4 Jul 2021 16:03:07 -0400
+Subject: [PATCH] overlays: Add overlay for Si446x Transceiver SPI
+
+See: https://github.com/raspberrypi/linux/pull/4430
+
+Signed-off-by: Sunip K. Mukherjee <sunipkmukherjee@gmail.com>
+---
+ arch/arm/boot/dts/overlays/Makefile           |  1 +
+ arch/arm/boot/dts/overlays/README             | 10 ++++
+ .../boot/dts/overlays/si446x-spi0-overlay.dts | 53 +++++++++++++++++++
+ 3 files changed, 64 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/si446x-spi0-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -176,6 +176,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ 	seeed-can-fd-hat-v1.dtbo \
+ 	seeed-can-fd-hat-v2.dtbo \
+ 	sh1106-spi.dtbo \
++	si446x-spi0.dtbo \
+ 	smi.dtbo \
+ 	smi-dev.dtbo \
+ 	smi-nand.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -2733,6 +2733,16 @@ Params: speed                   SPI bus
+         height                  Display height (32 or 64; default 64)
+ 
+ 
++Name:   si446x-spi0
++Info:   Overlay for Si446x UHF Transceiver via SPI using si446x driver.
++        The driver is currently out-of-tree at
++        https://github.com/sunipkmukherjee/silabs.git
++Load:   dtoverlay=si446x-spi0,<param>=<val>
++Params: speed                   SPI bus speed (default 4000000)
++        int_pin                 GPIO pin for interrupts (default 17)
++        reset_pin               GPIO pin for RESET (default 27)
++
++
+ Name:   smi
+ Info:   Enables the Secondary Memory Interface peripheral. Uses GPIOs 2-25!
+ Load:   dtoverlay=smi
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/si446x-spi0-overlay.dts
+@@ -0,0 +1,53 @@
++// Overlay for the SiLabs Si446X Controller - SPI0
++// Default Interrupt Pin: 17
++// Default SDN Pin: 27
++/dts-v1/;
++/plugin/;
++
++   / {
++    compatible = "brcm,bcm2835";
++
++    fragment@0 {
++        target = <&spi0>;
++        __overlay__ {
++            // needed to avoid dtc warning
++            #address-cells = <1>;
++            #size-cells = <0>;
++
++            status = "okay";
++
++            uhf0: si446x@0{
++                compatible = "silabs,si446x";
++                reg = <0>; // CE0
++                pinctrl-names = "default";
++                pinctrl-0 = <&uhf0_pins>;
++                interrupt-parent = <&gpio>;
++                interrupts = <17 0x2>; // falling edge
++                spi-max-frequency = <4000000>;
++                sdn_pin = <27>;
++                irq_pin = <17>;
++                status = "okay";
++            };
++        };
++    };
++
++    fragment@1 {
++        target = <&gpio>;
++        __overlay__ {
++            uhf0_pins: uhf0_pins {
++                brcm,pins = <17 27>;
++                brcm,function = <0 1>; // in, out
++                brcm,pull = <2 0>; // high, none
++            };
++        };
++    };
++
++    __overrides__ {
++        int_pin = <&uhf0>, "interrupts:0",
++                  <&uhf0>, "irq_pin:0",
++                  <&uhf0_pins>, "brcm,pins:0";
++        reset_pin = <&uhf0>, "sdn_pin:0",
++                    <&uhf0_pins>, "brcm,pins:4";
++        speed   = <&uhf0>, "spi-max-frequency:0";
++    };
++};