linux-kernel - [PATCH v13 04/15] dt-bindings: spi: dw: Add AMD Pensando Elba SoC SPI Controller

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Message-ID: <20230410184526.15990-5-blarson@amd.com>
Date:   Mon, 10 Apr 2023 11:45:15 -0700
From:   Brad Larson <blarson@....com>
To:     <linux-arm-kernel@...ts.infradead.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
        <linux-spi@...r.kernel.org>, <adrian.hunter@...el.com>,
        <alcooperx@...il.com>, <andy.shevchenko@...il.com>,
        <arnd@...db.de>, <blarson@....com>, <brendan.higgins@...ux.dev>,
        <briannorris@...omium.org>, <brijeshkumar.singh@....com>,
        <catalin.marinas@....com>, <davidgow@...gle.com>,
        <gsomlo@...il.com>, <gerg@...ux-m68k.org>, <krzk@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <lee@...nel.org>,
        <lee.jones@...aro.org>, <broonie@...nel.org>,
        <yamada.masahiro@...ionext.com>, <p.zabel@...gutronix.de>,
        <piotrs@...ence.com>, <p.yadav@...com>, <rdunlap@...radead.org>,
        <robh+dt@...nel.org>, <samuel@...lland.org>,
        <fancer.lancer@...il.com>, <skhan@...uxfoundation.org>,
        <suravee.suthikulpanit@....com>, <thomas.lendacky@....com>,
        <tonyhuang.sunplus@...il.com>, <ulf.hansson@...aro.org>,
        <vaishnav.a@...com>, <will@...nel.org>,
        <devicetree@...r.kernel.org>
Subject: [PATCH v13 04/15] dt-bindings: spi: dw: Add AMD Pensando Elba SoC SPI Controller

The AMD Pensando Elba SoC has integrated the DW APB SPI Controller

Signed-off-by: Brad Larson <blarson@....com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Reviewed-by: Serge Semin <fancer.lancer@...il.com>
---

v12 changes:
- Correct property amd,pensando-elba-syscon description

v10 changes:
- Move definition of amd,pensando-elba-syscon into properties
  with a better description
- Add amd,pensando-elba-syscon: false for non elba designs

v9 changes:
- Define property amd,pensando-elba-syscon
- Move compatible amd,pensando-elba-spi ahead of baikal,bt1-ssi

---
 .../bindings/spi/snps,dw-apb-ssi.yaml         | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
index a132b5fc56e0..12ca108864c6 100644
--- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
+++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
@@ -37,6 +37,17 @@ allOf:
     else:
       required:
         - interrupts
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: amd,pensando-elba-spi
+    then:
+      required:
+        - amd,pensando-elba-syscon
+    else:
+      properties:
+        amd,pensando-elba-syscon: false
 
 properties:
   compatible:
@@ -63,6 +74,8 @@ properties:
         const: intel,keembay-ssi
       - description: Intel Thunder Bay SPI Controller
         const: intel,thunderbay-ssi
+      - description: AMD Pensando Elba SoC SPI Controller
+        const: amd,pensando-elba-spi
       - description: Baikal-T1 SPI Controller
         const: baikal,bt1-ssi
       - description: Baikal-T1 System Boot SPI Controller
@@ -136,6 +149,12 @@ properties:
       of the designware controller, and the upper limit is also subject to
       controller configuration.
 
+  amd,pensando-elba-syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description:
+      Block address to control SPI chip-selects. The Elba SoC system controller
+      provides an interface to override the native DWC SSI CS control.
+
 patternProperties:
   "^.*@[0-9a-f]+$":
     type: object
-- 
2.17.1