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openwrt/target/linux/bcm27xx/patches-6.6/950-0894-arm-dt-bcm2712-Reduce-DDC-frequency-to-97.5kHz-from-.patch
Álvaro Fernández Rojas 8c405cdccc bcm27xx: add 6.6 kernel patches
The patches were generated from the RPi repo with the following command:
git format-patch v6.6.34..rpi-6.1.y

Some patches needed rebasing and, as usual, the applied and reverted, wireless
drivers, Github workflows, READMEs and defconfigs patches were removed.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2024-06-18 18:52:49 +02:00

36 lines
1.1 KiB
Diff

From b1ad4444ae92156e21972ce74eaafb82e0ac61d7 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Tue, 13 Feb 2024 15:33:37 +0000
Subject: [PATCH 0894/1085] arm: dt: bcm2712: Reduce DDC frequency to 97.5kHz
from 200kHz.
The I2C spec says the DDC link should run at 100kHz or less, however
Pi5/BCM2712 had been configured for 200kHz.
Reduce it to comply with the spec, and match Pi4.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
arch/arm/boot/dts/broadcom/bcm2712.dtsi | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm/boot/dts/broadcom/bcm2712.dtsi
+++ b/arch/arm/boot/dts/broadcom/bcm2712.dtsi
@@ -442,7 +442,7 @@
reg = <0x7d508200 0x58>;
interrupt-parent = <&bsc_irq>;
interrupts = <1>;
- clock-frequency = <200000>;
+ clock-frequency = <97500>;
#address-cells = <1>;
#size-cells = <0>;
status = "disabled";
@@ -453,7 +453,7 @@
reg = <0x7d508280 0x58>;
interrupt-parent = <&bsc_irq>;
interrupts = <2>;
- clock-frequency = <200000>;
+ clock-frequency = <97500>;
#address-cells = <1>;
#size-cells = <0>;
status = "disabled";