dt-bindings: fuse: Move renesas,rcar-{efuse,otp} to nvmem

The R-Car E-FUSE blocks can be modelled better using the nvmem
framework.

Replace the R-Car V3U example by an R-Car S4-8 ES1.2 example, to show
the definition of nvmem cells.  While at it, drop unneeded labels from
the examples, and fix indentation.

Add an entry to the MAINTAINERS file.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20241030140315.40562-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 36 insertions, 17 deletions

diff --git a/Documentation/devicetree/bindings/fuse/renesas,rcar-efuse.yaml b/Documentation/devicetree/bindings/nvmem/renesas,rcar-efuse.yaml
index d7e289244e72..ce7d65afa460 100644
--- a/Documentation/devicetree/bindings/fuse/renesas,rcar-efuse.yaml
+++ b/Documentation/devicetree/bindings/nvmem/renesas,rcar-efuse.yaml
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/fuse/renesas,rcar-efuse.yaml#
+$id: http://devicetree.org/schemas/nvmem/renesas,rcar-efuse.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
 title: R-Car E-FUSE connected to PFC
@@ -13,6 +13,9 @@ description:
   The E-FUSE is a type of non-volatile memory, which is accessible through the
   Pin Function Controller (PFC) on some R-Car Gen4 SoCs.
 
+allOf:
+  - $ref: nvmem.yaml#
+
 properties:
   compatible:
     enum:
@@ -39,17 +42,27 @@ required:
   - power-domains
   - resets
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |
-    #include <dt-bindings/clock/r8a779a0-cpg-mssr.h>
-    #include <dt-bindings/power/r8a779a0-sysc.h>
-
-    fuse: fuse@e6078800 {
-            compatible = "renesas,r8a779a0-efuse";
-            reg = <0xe6078800 0x100>;
-            clocks = <&cpg CPG_MOD 916>;
-            power-domains = <&sysc R8A779A0_PD_ALWAYS_ON>;
-            resets = <&cpg 916>;
+    #include <dt-bindings/clock/r8a779f0-cpg-mssr.h>
+    #include <dt-bindings/power/r8a779f0-sysc.h>
+
+    fuse@e6078800 {
+        compatible = "renesas,r8a779f0-efuse";
+        reg = <0xe6078800 0x200>;
+        clocks = <&cpg CPG_MOD 915>;
+        power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
+        resets = <&cpg 915>;
+
+        nvmem-layout {
+            compatible = "fixed-layout";
+            #address-cells = <1>;
+            #size-cells = <1>;
+
+            calib@144 {
+                reg = <0x144 0x08>;
+            };
+        };
     };
diff --git a/Documentation/devicetree/bindings/fuse/renesas,rcar-otp.yaml b/Documentation/devicetree/bindings/nvmem/renesas,rcar-otp.yaml
index d74872ae9ff3..3313c03ea68d 100644
--- a/Documentation/devicetree/bindings/fuse/renesas,rcar-otp.yaml
+++ b/Documentation/devicetree/bindings/nvmem/renesas,rcar-otp.yaml
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/fuse/renesas,rcar-otp.yaml#
+$id: http://devicetree.org/schemas/nvmem/renesas,rcar-otp.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
 title: R-Car E-FUSE connected to OTP_MEM
@@ -13,6 +13,9 @@ description:
   The E-FUSE is a type of non-volatile memory, which is accessible through the
   One-Time Programmable Memory (OTP_MEM) module on some R-Car Gen4 SoCs.
 
+allOf:
+  - $ref: nvmem.yaml#
+
 properties:
   compatible:
     enum:
@@ -22,17 +25,19 @@ properties:
   reg:
     items:
       - description: OTP_MEM_0
-      - description: OTP_MEM_1
+      - description: OTP_MEM_1.
+          The addresses of cells defined under the optional nvmem-layout
+          subnode are relative to this register bank.
 
 required:
   - compatible
   - reg
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |
-    otp: otp@e61be000 {
-            compatible = "renesas,r8a779g0-otp";
-            reg = <0xe61be000 0x1000>, <0xe61bf000 0x1000>;
+    otp@e61be000 {
+        compatible = "renesas,r8a779g0-otp";
+        reg = <0xe61be000 0x1000>, <0xe61bf000 0x1000>;
     };
diff --git a/MAINTAINERS b/MAINTAINERS
index ba4d3aaf5726..fb10bd3fa63b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2922,6 +2922,7 @@ Q:	http://patchwork.kernel.org/project/linux-renesas-soc/list/
 C:	irc://irc.libera.chat/renesas-soc
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel.git next
 F:	Documentation/devicetree/bindings/hwinfo/renesas,prr.yaml
+F:	Documentation/devicetree/bindings/nvmem/renesas,*
 F:	Documentation/devicetree/bindings/soc/renesas/
 F:	arch/arm/boot/dts/renesas/
 F:	arch/arm/configs/shmobile_defconfig