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

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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: Biwen Li <biwen.li@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Biwen Li
2022-09-14 16:15:37 -05:00
committed by Shawn Guo
parent ad5b6611e1
commit 822f91d512
1 changed files with 2 additions and 0 deletions
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2
arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi
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@@ -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>;