Commit 822f91d5 authored by Biwen Li's avatar Biwen Li Committed by Shawn Guo
Browse files

arm64: dts: ls208xa-rdb: fix errata E-00013 



Specify a channel zero in idle state to avoid enterring tri-stated state
for PCA9547.

Some information about E-00013:
- Description: I2C1 and I2C3 buses are missing pull-up.
- Impact: When the PCA954x device is tri-stated, the I2C bus will float.
  This makes the I2C bus and its associated downstream devices
  inaccessible.
- Hardware fix: Populate resistors R189 and R190 for I2C1 and resistors
  R228 and R229 for I2C3.
- Software fix: Remove the tri-state option from the PCA954x
  driver(PCA954x always on enable status, specify a channel zero in dts to
  fix the errata E-00013).

Signed-off-by: default avatarBiwen Li <biwen.li@nxp.com>
Signed-off-by: default avatarLi Yang <leoyang.li@nxp.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent ad5b6611

arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi

+2 −0
Original line number Diff line number Diff line
@@ -49,6 +49,8 @@ pca9547@75 { 
		reg = <0x75>;

		#address-cells = <1>;

		#size-cells = <0>;

		idle-state = <0>;



		i2c@1 {

			#address-cells = <1>;

			#size-cells = <0>;