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| author |   Biwen Li <biwen.li@nxp.com> | 2022-09-14 16:15:37 -0500 |
|---|---|---|
| committer |   Shawn Guo <shawnguo@kernel.org> | 2022-09-17 16:35:22 +0800 |
| commit | 822f91d512abfe70349fce7b79cbdee8d0d016e9 (patch) | |
| tree | fdb6c17fb60cdd82f3f340392cece3ff752da882 | |
| parent | arm64: dts: ls2081a-rdb: Add DTS for NXP LS2081ARDB (diff) | |
| download | linux-dev-822f91d512abfe70349fce7b79cbdee8d0d016e9.tar.xz linux-dev-822f91d512abfe70349fce7b79cbdee8d0d016e9.zip | |
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: Biwen Li <biwen.li@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
| -rw-r--r-- | arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi | 2 |
1 files changed, 2 insertions, 0 deletions
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 @@ reg = <0x75>; #address-cells = <1>; #size-cells = <0>; + idle-state = <0>; + i2c@1 { #address-cells = <1>; #size-cells = <0>; |