Thread (9 messages) 9 messages, 3 authors, 2025-09-17

Re: [PATCH v6 1/5] media: dt-bindings: nxp,imx8mq-mipi-csi2: Add i.MX8ULP compatible string

From: Frank Li <Frank.li@nxp.com>
Date: 2025-09-17 15:54:05
Also in: imx, linux-devicetree, linux-media, lkml

On Wed, Sep 17, 2025 at 04:14:50PM +0800, Guoniu Zhou wrote:
From: Guoniu Zhou <redacted>

The CSI-2 receiver in the i.MX8ULP is almost identical to the version
present in the i.MX8QXP/QM, but i.MX8ULP CSI-2 controller needs pclk
clock as the input clock for its APB interface of Control and Status
register(CSR). So add compatible string fsl,imx8ulp-mipi-csi2 and
increase maxItems of Clocks (clock-names) to 4 from 3.  And keep the
same restriction for existing compatible.

Signed-off-by: Guoniu Zhou <redacted>
---
There are long discussion at previous verison.

For refer:
	https://lore.kernel.org/imx/20250903192142.GA10637@pendragon.ideasonboard.com/ (local)

	compatible string "fsl,imx8qxp-mipi-csi2", has clock A, B, C
        compatible string "fsl,imx8ulp-mipi-csi2", has clock A, B, C, D

	clock B is special one, driver need know clk-freqeuncy. Other
clocks just enable/disable.

	The program module is the same.

	It is not important about if fsl,imx8ulp-mipi-csi2 need fallback
to fsl,imx8qxp-mipi-csi2 since driver has to been updated, only one line
additional change.

	To keep simple and strangh forward, don't set fsl,imx8ulp-mipi-csi2
fallback to fsl,imx8qxp-mipi-csi2.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
quoted hunk ↗ jump to hunk
 .../bindings/media/nxp,imx8mq-mipi-csi2.yaml       | 41 ++++++++++++++++++++--
 1 file changed, 39 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml b/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
index 3389bab266a9adbda313c8ad795b998641df12f3..da3978da1cab75292ada3f24837443f7f4ab6418 100644
--- a/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
+++ b/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
@@ -20,6 +20,7 @@ properties:
       - enum:
           - fsl,imx8mq-mipi-csi2
           - fsl,imx8qxp-mipi-csi2
+          - fsl,imx8ulp-mipi-csi2
       - items:
           - const: fsl,imx8qm-mipi-csi2
           - const: fsl,imx8qxp-mipi-csi2
@@ -39,12 +40,16 @@ properties:
                      clock that the RX DPHY receives.
       - description: ui is the pixel clock (phy_ref up to 333Mhz).
                      See the reference manual for details.
+      - description: pclk is clock for csr APB interface.
+    minItems: 3

   clock-names:
     items:
       - const: core
       - const: esc
       - const: ui
+      - const: pclk
+    minItems: 3

   power-domains:
     maxItems: 1
@@ -130,19 +135,51 @@ allOf:
         compatible:
           contains:
             enum:
-              - fsl,imx8qxp-mipi-csi2
+              - fsl,imx8ulp-mipi-csi2
+    then:
+      properties:
+        reg:
+          minItems: 2
+        resets:
+          minItems: 2
+          maxItems: 2
+        clocks:
+          minItems: 4
+        clock-names:
+          minItems: 4
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx8qxp-mipi-csi2
     then:
       properties:
         reg:
           minItems: 2
         resets:
           maxItems: 1
-    else:
+        clocks:
+          maxItems: 3
+        clock-names:
+          maxItems: 3
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8mq-mipi-csi2
+    then:
       properties:
         reg:
           maxItems: 1
         resets:
           minItems: 3
+        clocks:
+          maxItems: 3
+        clock-names:
+          maxItems: 3
       required:
         - fsl,mipi-phy-gpr


--
2.34.1
  
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