Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Received-SPF: Pass (protection.outlook.com: domain of amd.com designates
 165.204.84.17 as permitted sender) receiver=protection.outlook.com;
 client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C
From:   Brad Larson <blarson@amd.com>
To:     <linux-arm-kernel@lists.infradead.org>
CC:     <linux-kernel@vger.kernel.org>, <linux-mmc@vger.kernel.org>,
        <linux-spi@vger.kernel.org>, <adrian.hunter@intel.com>,
        <alcooperx@gmail.com>, <andy.shevchenko@gmail.com>,
        <arnd@arndb.de>, <blarson@amd.com>, <brendan.higgins@linux.dev>,
        <briannorris@chromium.org>, <catalin.marinas@arm.com>,
        <conor+dt@kernel.org>, <davidgow@google.com>, <gsomlo@gmail.com>,
        <gerg@linux-m68k.org>, <hal.feng@starfivetech.com>,
        <hasegawa-hitomi@fujitsu.com>, <j.neuschaefer@gmx.net>,
        <joel@jms.id.au>, <kernel@esmil.dk>, <krzk@kernel.org>,
        <krzysztof.kozlowski+dt@linaro.org>, <lee@kernel.org>,
        <lee.jones@linaro.org>, <broonie@kernel.org>,
        <p.zabel@pengutronix.de>, <rdunlap@infradead.org>,
        <robh+dt@kernel.org>, <samuel@sholland.org>,
        <fancer.lancer@gmail.com>, <skhan@linuxfoundation.org>,
        <suravee.suthikulpanit@amd.com>, <thomas.lendacky@amd.com>,
        <tonyhuang.sunplus@gmail.com>, <ulf.hansson@linaro.org>,
        <vaishnav.a@ti.com>, <walker.chen@starfivetech.com>,
        <will@kernel.org>, <zhuyinbo@loongson.cn>,
        <devicetree@vger.kernel.org>
Subject: [PATCH v15 2/6] dt-bindings: soc: amd: amd,pensando-elba-ctrl: Add Pensando SoC Controller
Date:   Fri, 11 Aug 2023 11:05:15 -0700
Message-ID: <20230811180519.29644-3-blarson@amd.com>
In-Reply-To: <20230811180519.29644-1-blarson@amd.com>
References: <20230811180519.29644-1-blarson@amd.com>
MIME-Version: 1.0
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Aug 2023 18:05:41.9973
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 5b84adeb-b16b-436e-0132-08db9a9593a0
X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com]
X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002636B.namprd02.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6309
X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,
        DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO,
        RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE,
        URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Support the AMD Pensando Elba SoC Controller which is a SPI connected
device providing a miscellaneous set of essential board control/status
registers.  This device is present in all Pensando SoC based designs.

Signed-off-by: Brad Larson <blarson@amd.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---

v14 changes:
- Change GPL-2.0-only or BSD-2-Clause to GPL-2.0-only OR BSD-2-Clause

v11 changes:
- Fixed the compatible which should have stayed as 'amd,pensando-elba-ctrl',
  the commit message, and the filename
- Reference spi-peripheral-props
- Delete spi-max-frequency
- Remove num-cs from example

v10 changes:
- Property renamed to amd,pensando-ctrl
- Driver is renamed and moved to soc/drivers/amd affecting binding
- Delete cs property, driver handles device node creation from parent num-cs
  fixing schema reg error in a different way

v9 changes:
- Instead of four nodes, one per chip-select, a single
  node is used with reset-cells in the parent.
- No MFD API is used anymore in the driver so it made
  sense to move this to drivers/spi.
- This driver is common for all Pensando SoC based designs
  so changed the name to pensando-sr.c to not make it Elba
  SoC specific.
- Added property cs for the chip-select number which is used
  by the driver to create /dev/pensr0.<cs>

---
 .../soc/amd/amd,pensando-elba-ctrl.yaml       | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/amd/amd,pensando-elba-ctrl.yaml

diff --git a/Documentation/devicetree/bindings/soc/amd/amd,pensando-elba-ctrl.yaml b/Documentation/devicetree/bindings/soc/amd/amd,pensando-elba-ctrl.yaml
new file mode 100644
index 000000000000..e96978ad1e37
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/amd/amd,pensando-elba-ctrl.yaml
@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/amd/amd,pensando-elba-ctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AMD Pensando Elba SoC Controller
+
+description:
+  The AMD Pensando Elba SoC Controller is a SPI connected device with essential
+  control/status registers accessed on chip select 0.  This device is present
+  in all Pensando SoC based designs.
+
+maintainers:
+  - Brad Larson <blarson@amd.com>
+
+properties:
+  compatible:
+    enum:
+      - amd,pensando-elba-ctrl
+
+  reg:
+    maxItems: 1
+
+  '#reset-cells':
+    const: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - '#reset-cells'
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        system-controller@0 {
+            compatible = "amd,pensando-elba-ctrl";
+            reg = <0>;
+            spi-max-frequency = <12000000>;
+            interrupt-parent = <&porta>;
+            interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+            #reset-cells = <1>;
+        };
+    };
+
+...
-- 
2.17.1