Hi Rob,
On Tuesday, September 29, 2020 4:23 PM, Ran Wang wrote:
>
> From: Biwen Li <biwen.li@xxxxxxx>
>
> The 'fsl,ippdexpcr1-alt-reg' property is used to handle an errata A-008646 on
> LS1021A.
>
> Signed-off-by: Biwen Li <biwen.li@xxxxxxx>
> Signed-off-by: Ran Wang <ran.wang_1@xxxxxxx>
> ---
> Change in v3:
> - Simplize related proterty definition and rename it.
Could you please comment for this version? Thanks in advance.
Regards,
Ran
> Change in v2:
> - None
>
> Documentation/devicetree/bindings/soc/fsl/rcpm.txt | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> index 5a33619..62a22fc 100644
> --- a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> +++ b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> @@ -34,6 +34,9 @@ Chassis Version Example Chips
> Optional properties:
> - little-endian : RCPM register block is Little Endian. Without it RCPM
> will be Big Endian (default case).
> + - fsl,ippdexpcr1-alt-reg : The property is trying to workaround a
> + hardware issue (found on SoC LS1021A only), if pressent, RCPM driver
> + will use SCFG_SPARECR8 as a shadow register for RCPM_IPPDEXPCR1.
>
> Example:
> The RCPM node for T4240:
> @@ -43,6 +46,15 @@ The RCPM node for T4240:
> #fsl,rcpm-wakeup-cells = <2>;
> };
>
> +The RCPM node for LS1021A:
> + rcpm: rcpm@1ee2140 {
> + compatible = "fsl,ls1021a-rcpm", "fsl,qoriq-rcpm-2.1+";
> + reg = <0x0 0x1ee2140 0x0 0x8>;
> + #fsl,rcpm-wakeup-cells = <2>;
> + fsl,ippdexpcr1-alt-reg;
> + };
> +
> +
> * Freescale RCPM Wakeup Source Device Tree Bindings
> -------------------------------------------
> Required fsl,rcpm-wakeup property should be added to a device node if the
> device
> --
> 2.7.4
