diff mbox series

[v3,3/4] powerpc/fsl: set fsl, i2c-erratum-a004447 flag for P1010 i2c controllers

Message ID 20210511212052.27242-4-chris.packham@alliedtelesis.co.nz
State Not Applicable
Headers show
Series P2040/P2041 i2c recovery erratum | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (fcc98c6d0289241dded10b74f8198fc4ecb22bd1)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 15 lines checked
snowpatch_ozlabs/needsstable success Patch has no Fixes tags

Commit Message

Chris Packham May 11, 2021, 9:20 p.m. UTC
The i2c controllers on the P1010 have an erratum where the documented
scheme for i2c bus recovery will not work (A-004447). A different
mechanism is needed which is documented in the P1010 Chip Errata Rev L.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
---

Notes:
    Changes in v3:
    - New

 arch/powerpc/boot/dts/fsl/p1010si-post.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Michael Ellerman May 26, 2021, 1:02 a.m. UTC | #1
Chris Packham <chris.packham@alliedtelesis.co.nz> writes:
> The i2c controllers on the P1010 have an erratum where the documented
> scheme for i2c bus recovery will not work (A-004447). A different
> mechanism is needed which is documented in the P1010 Chip Errata Rev L.
>
> Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
> ---
>
> Notes:
>     Changes in v3:
>     - New
>
>  arch/powerpc/boot/dts/fsl/p1010si-post.dtsi | 8 ++++++++
>  1 file changed, 8 insertions(+)

Acked-by: Michael Ellerman <mpe@ellerman.id.au>

cheers

> diff --git a/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi b/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
> index c2717f31925a..ccda0a91abf0 100644
> --- a/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
> +++ b/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
> @@ -122,7 +122,15 @@ memory-controller@2000 {
>  	};
>  
>  /include/ "pq3-i2c-0.dtsi"
> +	i2c@3000 {
> +		fsl,i2c-erratum-a004447;
> +	};
> +
>  /include/ "pq3-i2c-1.dtsi"
> +	i2c@3100 {
> +		fsl,i2c-erratum-a004447;
> +	};
> +
>  /include/ "pq3-duart-0.dtsi"
>  /include/ "pq3-espi-0.dtsi"
>  	spi0: spi@7000 {
> -- 
> 2.31.1
diff mbox series

Patch

diff --git a/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi b/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
index c2717f31925a..ccda0a91abf0 100644
--- a/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
@@ -122,7 +122,15 @@  memory-controller@2000 {
 	};
 
 /include/ "pq3-i2c-0.dtsi"
+	i2c@3000 {
+		fsl,i2c-erratum-a004447;
+	};
+
 /include/ "pq3-i2c-1.dtsi"
+	i2c@3100 {
+		fsl,i2c-erratum-a004447;
+	};
+
 /include/ "pq3-duart-0.dtsi"
 /include/ "pq3-espi-0.dtsi"
 	spi0: spi@7000 {