linux-kernel - [PATCH v2 1/4] media: dt-bindings: nxp,imx8mq-mipi-csi2: Add i.MX8ULP compatible string

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Message-Id: <20250822-csi2_imx8ulp-v2-1-26a444394965@nxp.com>
Date: Fri, 22 Aug 2025 18:50:12 +0800
From: Guoniu Zhou <guoniu.zhou@....com>
To: Rui Miguel Silva <rmfrfs@...il.com>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Martin Kepplinger <martink@...teo.de>, Purism Kernel Team <kernel@...i.sm>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Philipp Zabel <p.zabel@...gutronix.de>, 
 Frank Li <Frank.Li@....com>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Guoniu Zhou <guoniu.zhou@....com>
Subject: [PATCH v2 1/4] media: dt-bindings: nxp,imx8mq-mipi-csi2: Add
 i.MX8ULP compatible string

The CSI-2 receiver in the i.MX8ULP is almost identical to the version
present in the i.MX8QXP/QM. But have different reset and clock design,
so add a device-specific compatible string for i.MX8ULP to handle the
difference.

Signed-off-by: Guoniu Zhou <guoniu.zhou@....com>
---
 .../bindings/media/nxp,imx8mq-mipi-csi2.yaml       | 42 ++++++++++++++++++++--
 1 file changed, 40 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..ca485d1d596c274eb7e1f3cdc39c61bb54cc0685 100644
--- a/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
+++ b/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
@@ -21,7 +21,9 @@ properties:
           - fsl,imx8mq-mipi-csi2
           - fsl,imx8qxp-mipi-csi2
       - items:
-          - const: fsl,imx8qm-mipi-csi2
+          - enum:
+              - fsl,imx8ulp-mipi-csi2
+              - fsl,imx8qm-mipi-csi2
           - const: fsl,imx8qxp-mipi-csi2
 
   reg:
@@ -39,12 +41,19 @@ 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 the lpav bus clock of i.MX8ULP. It provides
+                     clock to CSI_REG module.
+                     (see section "4.5.4 Peripheral clock diagrams,
+                      Figure 76 MIPI CSI clocking" in IMX8ULPRM REV1)
+    minItems: 3
 
   clock-names:
     items:
       - const: core
       - const: esc
       - const: ui
+      - const: pclk
+    minItems: 3
 
   power-domains:
     maxItems: 1
@@ -125,19 +134,48 @@ required:
   - ports
 
 allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8ulp-mipi-csi2
+    then:
+      properties:
+        reg:
+          minItems: 2
+        resets:
+          maxItems: 2
+          minItems: 2
+        clocks:
+          minItems: 4
+        clock-names:
+          minItems: 4
+
   - if:
       properties:
         compatible:
           contains:
             enum:
               - fsl,imx8qxp-mipi-csi2
+          not:
+            contains:
+              enum:
+                - fsl,imx8ulp-mipi-csi2
     then:
       properties:
         reg:
           minItems: 2
         resets:
           maxItems: 1
-    else:
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8mq-mipi-csi2
+    then:
       properties:
         reg:
           maxItems: 1

-- 
2.34.1