From d19261ffd077609e5d348f1c12894997807a64a8 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 10 Oct 2024 16:10:50 +0200 Subject: [PATCH] dt-bindings: leds: bcm63138: Add shift register bits The BCM63138 family of serial LED controllers has a register where we can set up bits for the shift registers. These are the number of rounds the bits need to be shifted before all bits have been shifted through the external shift registers. Signed-off-by: Linus Walleij Reviewed-by: Florian Fainelli Reviewed-by: Rob Herring (Arm) Link: https://lore.kernel.org/r/20241010-bcm63138-leds-v4-1-cdb80780a555@linaro.org Signed-off-by: Lee Jones --- .../devicetree/bindings/leds/leds-bcm63138.yaml | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml b/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml index bb20394fca5c..62326507c1aa 100644 --- a/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml +++ b/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml @@ -41,6 +41,16 @@ properties: "#size-cells": const: 0 + brcm,serial-shift-bits: + minimum: 1 + maximum: 32 + description: + This describes the number of 8-bit serial shifters connected to the LED + controller block. The hardware is typically using 8-bit shift registers + with 8 LEDs per shift register, so 4 shifters results in 32 LEDs or 2 + shifters give 16 LEDs etc, but the hardware supports any odd number of + registers. If left unspecified, the hardware boot-time default is used. + patternProperties: "^led@[a-f0-9]+$": type: object @@ -71,6 +81,7 @@ examples: leds@ff800800 { compatible = "brcm,bcm4908-leds", "brcm,bcm63138-leds"; reg = <0xff800800 0xdc>; + brcm,serial-shift-bits = <16>; #address-cells = <1>; #size-cells = <0>; -- 2.51.0