linux-kernel - [PATCH v2 11/12] dt-bindings: nand: Add fsl,elbc-fcm-nand

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Message-Id: <20250207-ppcyaml-v2-11-8137b0c42526@posteo.net>
Date: Fri, 07 Feb 2025 22:30:28 +0100
From: J. Neuschäfer via B4 Relay <devnull+j.ne.posteo.net@...nel.org>
To: devicetree@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, 
 Krzysztof Kozlowski <krzk@...nel.org>
Cc: imx@...ts.linux.dev, Scott Wood <oss@...error.net>, 
 Madhavan Srinivasan <maddy@...ux.ibm.com>, 
 Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>, 
 Christophe Leroy <christophe.leroy@...roup.eu>, 
 Naveen N Rao <naveen@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Damien Le Moal <dlemoal@...nel.org>, 
 Niklas Cassel <cassel@...nel.org>, Herbert Xu <herbert@...dor.apana.org.au>, 
 "David S. Miller" <davem@...emloft.net>, Lee Jones <lee@...nel.org>, 
 Vinod Koul <vkoul@...nel.org>, Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, 
 J. Neuschäfer <j.neuschaefer@....net>, 
 Wim Van Sebroeck <wim@...ux-watchdog.org>, 
 Guenter Roeck <linux@...ck-us.net>, Mark Brown <broonie@...nel.org>, 
 Miquel Raynal <miquel.raynal@...tlin.com>, 
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>, 
 linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org, 
 linux-crypto@...r.kernel.org, dmaengine@...r.kernel.org, 
 linux-pci@...r.kernel.org, linux-watchdog@...r.kernel.org, 
 linux-spi@...r.kernel.org, linux-mtd@...ts.infradead.org, 
 J. Neuschäfer <j.ne@...teo.net>
Subject: [PATCH v2 11/12] dt-bindings: nand: Add fsl,elbc-fcm-nand

From: "J. Neuschäfer" <j.ne@...teo.net>

Formalize the binding already supported by the fsl_elbc_nand.c driver
and used in several device trees in arch/powerpc/boot/dts/.

Signed-off-by: J. Neuschäfer <j.ne@...teo.net>
---

V2:
- split out from fsl,elbc binding patch
- constrain #address-cells and #size-cells
- add a general description
- use unevaluatedProperties=false instead of additionalProperties=false
- fix property order to comply with dts coding style
- include raw-nand-chip.yaml instead of nand-chip.yaml
---
 .../devicetree/bindings/mtd/fsl,elbc-fcm-nand.yaml | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/fsl,elbc-fcm-nand.yaml b/Documentation/devicetree/bindings/mtd/fsl,elbc-fcm-nand.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..1de97bb24fa4a83e2ea5d94ab822dd0e37baa102
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/fsl,elbc-fcm-nand.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/fsl,elbc-fcm-nand.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NAND flash attached to Freescale eLBC
+
+description:
+  The Freescale Enhanced Local Bus controller (eLBC) contains logic to
+  interface with NAND flash, called the NAND Flash Control Machine (FCM).
+  This binding describes flash attached to an eLBC using the FCM.
+
+maintainers:
+  - J. Neuschäfer <j.ne@...teo.net>
+
+allOf:
+  - $ref: raw-nand-chip.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - fsl,mpc8313-fcm-nand
+              - fsl,mpc8315-fcm-nand
+              - fsl,mpc8377-fcm-nand
+              - fsl,mpc8378-fcm-nand
+              - fsl,mpc8379-fcm-nand
+              - fsl,mpc8536-fcm-nand
+              - fsl,mpc8569-fcm-nand
+              - fsl,mpc8572-fcm-nand
+              - fsl,p1020-fcm-nand
+              - fsl,p1021-fcm-nand
+              - fsl,p1025-fcm-nand
+              - fsl,p2020-fcm-nand
+          - const: fsl,elbc-fcm-nand
+      - const: fsl,elbc-fcm-nand
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    localbus {
+        #address-cells = <2>;
+        #size-cells = <1>;
+
+        nand@1,0 {
+            compatible = "fsl,mpc8315-fcm-nand",
+                         "fsl,elbc-fcm-nand";
+            reg = <0x1 0x0 0x2000>;
+            #address-cells = <1>;
+            #size-cells = <1>;
+        };
+    };

-- 
2.48.0.rc1.219.gb6b6757d772