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-5.15/950-0204-dt-bindings-clock-Add-a-binding-for-the-RPi-Firmware.patch b/target/linux/bcm27xx/patches-5.15/950-0204-dt-bindings-clock-Add-a-binding-for-the-RPi-Firmware.patch
new file mode 100644
index 0000000000..7b98b69fda
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0204-dt-bindings-clock-Add-a-binding-for-the-RPi-Firmware.patch
@@ -0,0 +1,63 @@
+From b0682b4ef5d4eb82ee702d8c3f3560349f1a231c Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Thu, 13 Feb 2020 17:51:09 +0100
+Subject: [PATCH] dt-bindings: clock: Add a binding for the RPi
+ Firmware clocks
+
+The firmare running on the RPi VideoCore can be used to discover and
+change the various clocks running in the BCM2711. Since devices will
+need to use them through the DT, let's add a pretty simple binding.
+
+Cc: Michael Turquette <mturquette@baylibre.com>
+Cc: Stephen Boyd <sboyd@kernel.org>
+Cc: Rob Herring <robh+dt@kernel.org>
+Cc: linux-clk@vger.kernel.org
+Cc: devicetree@vger.kernel.org
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ .../clock/raspberrypi,firmware-clocks.yaml    | 39 +++++++++++++++++++
+ 1 file changed, 39 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/clock/raspberrypi,firmware-clocks.yaml
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/clock/raspberrypi,firmware-clocks.yaml
+@@ -0,0 +1,39 @@
++# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/clock/raspberrypi,firmware-clocks.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: RaspberryPi Firmware Clocks Device Tree Bindings
++
++maintainers:
++  - Maxime Ripard <mripard@kernel.org>
++
++properties:
++  "#clock-cells":
++    const: 1
++
++  compatible:
++    const: raspberrypi,firmware-clocks
++
++  raspberrypi,firmware:
++    $ref: /schemas/types.yaml#/definitions/phandle
++    description: >
++      Phandle to the mailbox node to communicate with the firmware.
++
++required:
++  - "#clock-cells"
++  - compatible
++  - raspberrypi,firmware
++
++additionalProperties: false
++
++examples:
++  - |
++    firmware_clocks: firmware-clocks {
++        compatible = "raspberrypi,firmware-clocks";
++        raspberrypi,firmware = <&firmware>;
++        #clock-cells = <1>;
++    };
++
++...