linux-kernel - [PATCH v5 1/5] dt-bindings: ata: Add i.MX8QM AHCI compatible string

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Message-Id: <1722581213-15221-2-git-send-email-hongxing.zhu@nxp.com>
Date: Fri,  2 Aug 2024 14:46:49 +0800
From: Richard Zhu <hongxing.zhu@....com>
To: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	l.stach@...gutronix.de
Cc: hongxing.zhu@....com,
	devicetree@...r.kernel.org,
	linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	kernel@...gutronix.de,
	imx@...ts.linux.dev
Subject: [PATCH v5 1/5] dt-bindings: ata: Add i.MX8QM AHCI compatible string

Add i.MX8QM AHCI "fsl,imx8qm-ahci" compatible strings.

i.MX8QM AHCI SATA doesn't require AHB clock rate to set the vendor
specified TIMER1MS register. ahb clock is not required by i.MX8QM AHCI.

Update the description of clocks in the dt-binding accordingly.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
---
 .../devicetree/bindings/ata/imx-sata.yaml     | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/Documentation/devicetree/bindings/ata/imx-sata.yaml b/Documentation/devicetree/bindings/ata/imx-sata.yaml
index 68ffb97ddc9b2..f4eb3550a0960 100644
--- a/Documentation/devicetree/bindings/ata/imx-sata.yaml
+++ b/Documentation/devicetree/bindings/ata/imx-sata.yaml
@@ -19,6 +19,7 @@ properties:
       - fsl,imx53-ahci
       - fsl,imx6q-ahci
       - fsl,imx6qp-ahci
+      - fsl,imx8qm-ahci
 
   reg:
     maxItems: 1
@@ -27,12 +28,14 @@ properties:
     maxItems: 1
 
   clocks:
+    minItems: 2
     items:
       - description: sata clock
       - description: sata reference clock
       - description: ahb clock
 
   clock-names:
+    minItems: 2
     items:
       - const: sata
       - const: sata_ref
@@ -58,6 +61,25 @@ properties:
     $ref: /schemas/types.yaml#/definitions/flag
     description: if present, disable spread-spectrum clocking on the SATA link.
 
+  phys:
+    items:
+      - description: phandle to SATA PHY.
+          Since "REXT" pin is only present for first lane of i.MX8QM PHY, it's
+          calibration result will be stored, passed through second lane, and
+          shared with all three lanes PHY. The first two lanes PHY are used as
+          calibration PHYs, although only the third lane PHY is used by SATA.
+      - description: phandle to the first lane PHY of i.MX8QM.
+      - description: phandle to the second lane PHY of i.MX8QM.
+
+  phy-names:
+    items:
+      - const: sata-phy
+      - const: cali-phy0
+      - const: cali-phy1
+
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -65,6 +87,31 @@ required:
   - clocks
   - clock-names
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx53-ahci
+              - fsl,imx6q-ahci
+              - fsl,imx6qp-ahci
+    then:
+      properties:
+        clock-names:
+          minItems: 3
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8qm-ahci
+    then:
+      properties:
+        clock-names:
+          minItems: 2
+
 additionalProperties: false
 
 examples:
-- 
2.37.1