From ea9b088747d379256e2582dd5c29638bf4ff9928 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Wed, 31 Jan 2024 17:20:07 +0000
Subject: [PATCH 1263/1295] ARM: dts: rp1: Boost the I2C drive strength

Boosting the drive strength on I2C pins allows SCL to achieve safe
voltage swings, even at 1MHz.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
 arch/arm/boot/dts/rp1.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/arch/arm/boot/dts/rp1.dtsi
+++ b/arch/arm/boot/dts/rp1.dtsi
@@ -650,66 +650,79 @@
 			rp1_i2c4_34_35: rp1_i2c4_34_35 {
 				function = "i2c4";
 				pins = "gpio34", "gpio35";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c6_38_39: rp1_i2c6_38_39 {
 				function = "i2c6";
 				pins = "gpio38", "gpio39";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c4_40_41: rp1_i2c4_40_41 {
 				function = "i2c4";
 				pins = "gpio40", "gpio41";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c5_44_45: rp1_i2c5_44_45 {
 				function = "i2c5";
 				pins = "gpio44", "gpio45";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c0_0_1: rp1_i2c0_0_1 {
 				function = "i2c0";
 				pins = "gpio0", "gpio1";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c0_8_9: rp1_i2c0_8_9 {
 				function = "i2c0";
 				pins = "gpio8", "gpio9";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c1_2_3: rp1_i2c1_2_3 {
 				function = "i2c1";
 				pins = "gpio2", "gpio3";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c1_10_11: rp1_i2c1_10_11 {
 				function = "i2c1";
 				pins = "gpio10", "gpio11";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c2_4_5: rp1_i2c2_4_5 {
 				function = "i2c2";
 				pins = "gpio4", "gpio5";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c2_12_13: rp1_i2c2_12_13 {
 				function = "i2c2";
 				pins = "gpio12", "gpio13";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c3_6_7: rp1_i2c3_6_7 {
 				function = "i2c3";
 				pins = "gpio6", "gpio7";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c3_14_15: rp1_i2c3_14_15 {
 				function = "i2c3";
 				pins = "gpio14", "gpio15";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 			rp1_i2c3_22_23: rp1_i2c3_22_23 {
 				function = "i2c3";
 				pins = "gpio22", "gpio23";
+				drive-strength = <12>;
 				bias-pull-up;
 			};
 
