kernel: backport LEDs driver for BCMBCA devices

This includes BCM63xx and BCM4908 families.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit d9ab1e56d8d16182bd292f393c012d7e6873ed89)

1 files changed, 125 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.10/845-v5.20-0001-dt-bindings-leds-add-Broadcom-s-BCM63138-controller.patch b/target/linux/generic/backport-5.10/845-v5.20-0001-dt-bindings-leds-add-Broadcom-s-BCM63138-controller.patch
new file mode 100644
index 0000000000..b1072ce640
--- /dev/null
+++ b/target/linux/generic/backport-5.10/845-v5.20-0001-dt-bindings-leds-add-Broadcom-s-BCM63138-controller.patch
@@ -0,0 +1,125 @@
+From 13344f8ce8a0d98aa7f5d69ce3b47393c73a343b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Mon, 27 Dec 2021 15:59:04 +0100
+Subject: [PATCH] dt-bindings: leds: add Broadcom's BCM63138 controller
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Broadcom used 2 LEDs hardware blocks for their BCM63xx SoCs:
+1. Older one (BCM6318, BCM6328, BCM6362, BCM63268, BCM6838)
+2. Newer one (BCM6848, BCM6858, BCM63138, BCM63148, BCM63381, BCM68360)
+
+The newer one was also later also used on BCM4908 SoC.
+
+Old block is already documented in the leds-bcm6328.yaml. This binding
+documents the new one which uses different registers & programming. It's
+first used in BCM63138 thus the binding name.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Rob Herring <robh@kernel.org>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Pavel Machek <pavel@ucw.cz>
+---
+ .../bindings/leds/leds-bcm63138.yaml          | 95 +++++++++++++++++++
+ 1 file changed, 95 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/leds/leds-bcm63138.yaml
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml
+@@ -0,0 +1,95 @@
++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/leds/leds-bcm63138.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: Broadcom's BCM63138 LEDs controller
++
++maintainers:
++  - Rafał Miłecki <rafal@milecki.pl>
++
++description: |
++  This LEDs controller was first used on BCM63138 and later reused on BCM4908,
++  BCM6848, BCM6858, BCM63138, BCM63148, BCM63381 and BCM68360 SoCs.
++
++  It supports up to 32 LEDs that can be connected parallelly or serially. It
++  also includes limited support for hardware blinking.
++
++  Binding serially connected LEDs isn't documented yet.
++
++properties:
++  compatible:
++    oneOf:
++      - items:
++          - enum:
++              - brcm,bcm4908-leds
++              - brcm,bcm6848-leds
++              - brcm,bcm6858-leds
++              - brcm,bcm63148-leds
++              - brcm,bcm63381-leds
++              - brcm,bcm68360-leds
++          - const: brcm,bcm63138-leds
++      - const: brcm,bcm63138-leds
++
++  reg:
++    maxItems: 1
++
++  "#address-cells":
++    const: 1
++
++  "#size-cells":
++    const: 0
++
++patternProperties:
++  "^led@[a-f0-9]+$":
++    type: object
++
++    $ref: common.yaml#
++
++    properties:
++      reg:
++        maxItems: 1
++        description: LED pin number
++
++      active-low:
++        type: boolean
++        description: Makes LED active low.
++
++    required:
++      - reg
++
++    unevaluatedProperties: false
++
++required:
++  - reg
++  - "#address-cells"
++  - "#size-cells"
++
++additionalProperties: false
++
++examples:
++  - |
++    #include <dt-bindings/leds/common.h>
++
++    leds@ff800800 {
++        compatible = "brcm,bcm4908-leds", "brcm,bcm63138-leds";
++        reg = <0xff800800 0xdc>;
++
++        #address-cells = <1>;
++        #size-cells = <0>;
++
++        led@0 {
++            reg = <0x0>;
++            function = LED_FUNCTION_POWER;
++            color = <LED_COLOR_ID_GREEN>;
++            default-state = "on";
++        };
++
++        led@3 {
++            reg = <0x3>;
++            function = LED_FUNCTION_STATUS;
++            color = <LED_COLOR_ID_GREEN>;
++            active-low;
++        };
++    };