Merge patch series "scsi: ufs: renesas: Add support for R-Car S4-8 ES1.2"

Geert Uytterhoeven <[email protected]> says:

	Hi all,

Initialization of the UFS controller on R-Car S4-8 ES1.0 requires only
static values.  However, other UFS controller variants (R-Car S4-8 ES 1.2)
require dynamic values, like those obtained from E-FUSE, and downloading
firmware.

Hence this patch series refactors the initialization code to prepare for
this, and adds support for the UFS controller on R-Car S4-8 ES1.2.
The accompanying DTS change is available at [1].

This has been tested on:
  - Renesas Spider with R-Car S4-8 ES1.0 (broken before/after),
  - Renesas S4 Starter Kit with R-Car S4-8 ES1.2 (works after).

Thanks for your comments!

[1] "[PATCH] arm64: dts: renesas: r8a779f4: Add UFS tuning parameters in
     E-FUSE"
    https://lore.kernel.org/3e4fca228eb049d54a1ae520104558505dbdf803.1741179629.git.geert+renesas@glider.be
[2] "[PATCH v2 0/5] scsi: ufs: renesas: Refactor code for other UFS
     controller"
    https://lore.kernel.org/[email protected]
[3] "[PATCH 0/5] scsi: ufs: renesas: Refactor code for other UFS
     controller"
    https://lore.kernel.org/[email protected]

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin K. Petersen <[email protected]>

Author: martinkpetersen

Documentation/devicetree/bindings/ufs/renesas,ufs.yaml

@@ -33,6 +33,16 @@ properties:
   resets:
     maxItems: 1
 
+  nvmem-cells:
+    maxItems: 1
+
+  nvmem-cell-names:
+    items:
+      - const: calibration
+
+dependencies:
+  nvmem-cells: [ nvmem-cell-names ]
+
 required:
   - compatible
   - reg
@@ -58,4 +68,6 @@ examples:
         freq-table-hz = <200000000 200000000>, <38400000 38400000>;
         power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
         resets = <&cpg 1514>;
+        nvmem-cells = <&ufs_tune>;
+        nvmem-cell-names = "calibration";
     };