Messages in this thread Patch in this message | | | From | Li Yang <> | Subject | [PATCH v2 5/6] arm64: dts: ls208xa-rdb: fix errata E-00013 | Date | Wed, 17 Aug 2022 15:43:56 -0500 |
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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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