Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1c3389e6 authored by Marcel Ziswiler's avatar Marcel Ziswiler Committed by Thierry Reding
Browse files

ARM: tegra: Fix I2C bus frequencies on Apalis/Colibri 



Use a faster speed of 400 kbit/s for regular I2C busses.

Use a slower speed of 10 kbit/s for DDC/EDID to improve reliability.

Use a slower speed of 100 kbit/s for power I2C to be within specs of
the LM95245 temperature sensor.

While at it further annotate I2C pin usage.

Signed-off-by: default avatarMarcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 1014e895

arch/arm/boot/dts/tegra124-apalis-eval.dts

+2 −3
Original line number Original line Diff line number Diff line
@@ -105,7 +105,7 @@ 
	 */

	 */

	i2c@7000c000 {

	i2c@7000c000 {

		status = "okay";

		status = "okay";

		clock-frequency = <100000>;

		clock-frequency = <400000>;





		pcie-switch@58 {

		pcie-switch@58 {

			compatible = "plx,pex8605";

			compatible = "plx,pex8605";
@@ -124,7 +124,6 @@ 
	 */

	 */

	hdmi_ddc: i2c@7000c400 {

	hdmi_ddc: i2c@7000c400 {

		status = "okay";

		status = "okay";

		clock-frequency = <100000>;

	};

	};





	/*

	/*
@@ -133,7 +132,7 @@ 
	 */

	 */

	i2c@7000c500 {

	i2c@7000c500 {

		status = "okay";

		status = "okay";

		clock-frequency = <100000>;

		clock-frequency = <400000>;

	};

	};





	/* I2C4 (DDC): unused */

	/* I2C4 (DDC): unused */

arch/arm/boot/dts/tegra124-apalis.dtsi

+1 −1
Original line number Original line Diff line number Diff line
@@ -1579,7 +1579,7 @@ 
	};

	};





	hdmi_ddc: i2c@7000c400 {

	hdmi_ddc: i2c@7000c400 {

		clock-frequency = <100000>;

		clock-frequency = <10000>;

	};

	};





	/* PWR_I2C: power I2C to audio codec, PMIC and temperature sensor */

	/* PWR_I2C: power I2C to audio codec, PMIC and temperature sensor */

arch/arm/boot/dts/tegra20-colibri-512.dtsi

+11 −5
Original line number Original line Diff line number Diff line
@@ -213,21 +213,27 @@ 
			GPIO_ACTIVE_HIGH>;

			GPIO_ACTIVE_HIGH>;

	};

	};





	/*

	 * GEN1_I2C: I2C_SDA/SCL on SODIMM pin 194/196 (e.g. RTC on carrier

	 * board)

	 */

	i2c@7000c000 {

	i2c@7000c000 {

		clock-frequency = <400000>;

		clock-frequency = <400000>;

	};

	};





	/* DDC_SCL/SDA on X3 pin 15/16 (e.g. display EDID) */

	i2c_ddc: i2c@7000c400 {

	i2c_ddc: i2c@7000c400 {

		clock-frequency = <100000>;

		clock-frequency = <10000>;

	};

	};





	i2c@7000c500 {

	/* GEN2_I2C: unused */

		clock-frequency = <400000>;

	};





	/* CAM/GEN3_I2C: used as EXT_IO1/2 GPIOs on SODIMM pin 133/127 */



	/* PWR_I2C: power I2C to PMIC and temperature sensor (On-module) */

	i2c@7000d000 {

	i2c@7000d000 {

		status = "okay";

		status = "okay";

		clock-frequency = <400000>;

		clock-frequency = <100000>;





		pmic: tps6586x@34 {

		pmic: tps6586x@34 {

			compatible = "ti,tps6586x";

			compatible = "ti,tps6586x";

arch/arm/boot/dts/tegra30-apalis-eval.dts

+1 −1
Original line number Original line Diff line number Diff line
@@ -79,7 +79,7 @@ 
	 */

	 */

	i2c@7000c000 {

	i2c@7000c000 {

		status = "okay";

		status = "okay";

		clock-frequency = <100000>;

		clock-frequency = <400000>;





		pcie-switch@58 {

		pcie-switch@58 {

			compatible = "plx,pex8605";

			compatible = "plx,pex8605";

arch/arm/boot/dts/tegra30-apalis.dtsi

+1 −1
Original line number Original line Diff line number Diff line
@@ -437,7 +437,7 @@ 
	};

	};





	hdmiddc: i2c@7000c700 {

	hdmiddc: i2c@7000c700 {

		clock-frequency = <100000>;

		clock-frequency = <10000>;

	};

	};





	/*

	/*