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Subject[PATCH v3 1/5] Documentation: dt: binding: fsl: Add 'fsl,ippdexpcr1-alt-reg' property
Date
From: Biwen Li <biwen.li@nxp.com>

The 'fsl,ippdexpcr1-alt-reg' property is used to handle an errata A-008646
on LS1021A.

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
---
Change in v3:
- Simplize related proterty definition and rename it.

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
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