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Subject[PATCH v3 4/5] arm64: dts: ls208xa-rdb: fix errata E-00013
Date
From: Biwen Li <biwen.li@nxp.com>

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>
---
arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi
index f8135c5c252d..3d9647b3da14 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi
@@ -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>;
--
2.37.1
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