[PATCH v2 1/3] media: dt-bindings: samsung,exynos4212-fimc-is: replace duplicate pmu node with phandle

[Krzysztof Kozlowski]

The FIMC IS camera must access the PMU (Power Management Unit) IO memory
to control camera power.  This was achieved by duplicating the PMU node
as its child like:

  soc@0 {
    system-controller@10020000 { ... }; // Real PMU

    camera@11800000 {
      fimc-is@12000000 {
        // FIMC IS camera node
        pmu@10020000 {
          reg = <0x10020000 0x3000>; // Fake PMU node
        };
      };
    };
  };

This is not a correct representation of the hardware.  Mapping the PMU
(Power Management Unit) IO memory should be via syscon-like phandle
(samsung,pmu-syscon, already used for other drivers), not by duplicating
"pmu" Devicetree node inside the FIMC IS.

Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>

---

Changes in v2:
1. Add Rb tag.
---
 .../media/samsung,exynos4212-fimc-is.yaml         | 15 ++++++++++-----
 .../devicetree/bindings/media/samsung,fimc.yaml   |  5 +----
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/samsung,exynos4212-fimc-is.yaml b/Documentation/devicetree/bindings/media/samsung,exynos4212-fimc-is.yaml
index 3691cd4962b2..3a5ff3f47060 100644
--- a/Documentation/devicetree/bindings/media/samsung,exynos4212-fimc-is.yaml
+++ b/Documentation/devicetree/bindings/media/samsung,exynos4212-fimc-is.yaml
@@ -75,13 +75,20 @@ properties:
   power-domains:
     maxItems: 1
 
+  samsung,pmu-syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Power Management Unit (PMU) system controller interface, used to
+      power/start the ISP.
+
 patternProperties:
   "^pmu@[0-9a-f]+$":
     type: object
     additionalProperties: false
+    deprecated: true
     description:
       Node representing the SoC's Power Management Unit (duplicated with the
-      correct PMU node in the SoC).
+      correct PMU node in the SoC). Deprecated, use samsung,pmu-syscon.
 
     properties:
       reg:
@@ -131,6 +138,7 @@ required:
   - clock-names
   - interrupts
   - ranges
+  - samsung,pmu-syscon
   - '#size-cells'
 
 additionalProperties: false
@@ -179,15 +187,12 @@ examples:
                  <&sysmmu_fimc_fd>, <&sysmmu_fimc_mcuctl>;
         iommu-names = "isp", "drc", "fd", "mcuctl";
         power-domains = <&pd_isp>;
+        samsung,pmu-syscon = <&pmu_system_controller>;
 
         #address-cells = <1>;
         #size-cells = <1>;
         ranges;
 
-        pmu@10020000 {
-            reg = <0x10020000 0x3000>;
-        };
-
         i2c-isp@12140000 {
             compatible = "samsung,exynos4212-i2c-isp";
             reg = <0x12140000 0x100>;
diff --git a/Documentation/devicetree/bindings/media/samsung,fimc.yaml b/Documentation/devicetree/bindings/media/samsung,fimc.yaml
index 79ff6d83a9fd..530a08f5d3fe 100644
--- a/Documentation/devicetree/bindings/media/samsung,fimc.yaml
+++ b/Documentation/devicetree/bindings/media/samsung,fimc.yaml
@@ -236,15 +236,12 @@ examples:
                      <&sysmmu_fimc_fd>, <&sysmmu_fimc_mcuctl>;
             iommu-names = "isp", "drc", "fd", "mcuctl";
             power-domains = <&pd_isp>;
+            samsung,pmu-syscon = <&pmu_system_controller>;
 
             #address-cells = <1>;
             #size-cells = <1>;
             ranges;
 
-            pmu@10020000 {
-                reg = <0x10020000 0x3000>;
-            };
-
             i2c-isp@12140000 {
                 compatible = "samsung,exynos4212-i2c-isp";
                 reg = <0x12140000 0x100>;
-- 
2.34.1