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https://github.com/Ysurac/openmptcprouter.git
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80 lines
2.4 KiB
Diff
80 lines
2.4 KiB
Diff
From a3d53c8e96353c0d31e8984e67ff53d05378780a Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 31 Jan 2024 17:44:02 +0000
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Subject: [PATCH 0873/1002] ARM: dts: rp1: Add a safe I2C SDA hold time
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Failing to set a reasonable SDA hold time can cause SDA to change too
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close to the falling edge of SCL. 300ns is the recommended minimum
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interval between the two at 100kHz and 400kHz, and also seems to
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work at 1MHz, so use that.
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See: https://github.com/raspberrypi/linux/issues/5914
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/broadcom/rp1.dtsi | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/arch/arm/boot/dts/broadcom/rp1.dtsi b/arch/arm/boot/dts/broadcom/rp1.dtsi
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index 00e5c4cbd53f..05e4f7a4e111 100644
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--- a/arch/arm/boot/dts/broadcom/rp1.dtsi
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+++ b/arch/arm/boot/dts/broadcom/rp1.dtsi
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@@ -307,6 +307,7 @@ rp1_i2c0: i2c@70000 {
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clocks = <&rp1_clocks RP1_CLK_SYS>;
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i2c-scl-rising-time-ns = <65>;
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i2c-scl-falling-time-ns = <100>;
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+ i2c-sda-hold-time-ns = <300>;
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status = "disabled";
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};
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@@ -317,6 +318,7 @@ rp1_i2c1: i2c@74000 {
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clocks = <&rp1_clocks RP1_CLK_SYS>;
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i2c-scl-rising-time-ns = <65>;
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i2c-scl-falling-time-ns = <100>;
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+ i2c-sda-hold-time-ns = <300>;
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status = "disabled";
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};
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@@ -327,6 +329,7 @@ rp1_i2c2: i2c@78000 {
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clocks = <&rp1_clocks RP1_CLK_SYS>;
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i2c-scl-rising-time-ns = <65>;
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i2c-scl-falling-time-ns = <100>;
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+ i2c-sda-hold-time-ns = <300>;
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status = "disabled";
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};
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@@ -337,6 +340,7 @@ rp1_i2c3: i2c@7c000 {
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clocks = <&rp1_clocks RP1_CLK_SYS>;
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i2c-scl-rising-time-ns = <65>;
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i2c-scl-falling-time-ns = <100>;
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+ i2c-sda-hold-time-ns = <300>;
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status = "disabled";
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};
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@@ -347,6 +351,7 @@ rp1_i2c4: i2c@80000 {
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clocks = <&rp1_clocks RP1_CLK_SYS>;
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i2c-scl-rising-time-ns = <65>;
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i2c-scl-falling-time-ns = <100>;
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+ i2c-sda-hold-time-ns = <300>;
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status = "disabled";
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};
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@@ -357,6 +362,7 @@ rp1_i2c5: i2c@84000 {
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clocks = <&rp1_clocks RP1_CLK_SYS>;
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i2c-scl-rising-time-ns = <65>;
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i2c-scl-falling-time-ns = <100>;
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+ i2c-sda-hold-time-ns = <300>;
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status = "disabled";
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};
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@@ -367,6 +373,7 @@ rp1_i2c6: i2c@88000 {
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clocks = <&rp1_clocks RP1_CLK_SYS>;
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i2c-scl-rising-time-ns = <65>;
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i2c-scl-falling-time-ns = <100>;
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+ i2c-sda-hold-time-ns = <300>;
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status = "disabled";
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};
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--
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2.44.0
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