| From 460ddd2729f0dbb2723e48f3a22ffccbb78b42c7 Mon Sep 17 00:00:00 2001 |
| From: Dave Stevenson <dave.stevenson@raspberrypi.com> |
| Date: Tue, 31 Mar 2020 17:54:08 +0100 |
| Subject: [PATCH] dt: Drop I2C for Pi4 HDMI interfaces to 97.5kHz. |
| |
| It was set to 390kHz, which is outside of the required spec for |
| reading HDMI (max 100kHz). The i2c-brcmstb driver only supports |
| a number of fixed bus speeds, of which 97.5kHz is the closest to |
| 100kHz without exceeding it. |
| |
| Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> |
| --- |
| arch/arm/boot/dts/bcm2711.dtsi | 4 ++-- |
| 1 file changed, 2 insertions(+), 2 deletions(-) |
| |
| --- a/arch/arm/boot/dts/bcm2711.dtsi |
| +++ b/arch/arm/boot/dts/bcm2711.dtsi |
| @@ -358,7 +358,7 @@ |
| compatible = "brcm,bcm2711-hdmi-i2c"; |
| reg = <0x7ef04500 0x100>, <0x7ef00b00 0x300>; |
| reg-names = "bsc", "auto-i2c"; |
| - clock-frequency = <390000>; |
| + clock-frequency = <97500>; |
| status = "disabled"; |
| }; |
| |
| @@ -395,7 +395,7 @@ |
| compatible = "brcm,bcm2711-hdmi-i2c"; |
| reg = <0x7ef09500 0x100>, <0x7ef05b00 0x300>; |
| reg-names = "bsc", "auto-i2c"; |
| - clock-frequency = <390000>; |
| + clock-frequency = <97500>; |
| status = "disabled"; |
| }; |
| }; |