linux-kernel - [PATCH 1/2] dt-bindings: usb: samsung,exynos-dwc3: add exynos7870 support

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Message-Id: <20250204-exynos7870-usb-v1-1-a7753f8183a4@disroot.org>
Date: Tue, 04 Feb 2025 02:09:29 +0530
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk@...nel.org>, 
 Conor Dooley <conor@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>, 
 Thinh Nguyen <Thinh.Nguyen@...opsys.com>
Cc: Sergey Lisov <sleirsgoevy@...il.com>, linux-usb@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Kaustabh Chakraborty <kauschluss@...root.org>
Subject: [PATCH 1/2] dt-bindings: usb: samsung,exynos-dwc3: add exynos7870
 support

Document compatible string for Exynos7870 DWC3-compatible USB 2.0
driver. The devicetree node requires three clocks, named "usbdrd20",
"usbdrd20_ctrl_clk", and "usbdrd20_ref_clk".

Unlike other variants, Exynos7870's USB node doesn't require extra
regulators. Assert that the regulator nodes are required for all variants
other than Exynos7870's on an individual basis, instead of asserting it
globally.

Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
---
 .../bindings/usb/samsung,exynos-dwc3.yaml          | 34 ++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml b/Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml
index 2b3430cebe99106f3b6201ab31d4d9e3fcc55627..fb67d0538c60f03ec221cb7fe36852fa060ded06 100644
--- a/Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml
@@ -16,6 +16,7 @@ properties:
       - samsung,exynos5250-dwusb3
       - samsung,exynos5433-dwusb3
       - samsung,exynos7-dwusb3
+      - samsung,exynos7870-dwusb2
       - samsung,exynos850-dwusb3
 
   '#address-cells':
@@ -52,8 +53,6 @@ required:
   - clock-names
   - ranges
   - '#size-cells'
-  - vdd10-supply
-  - vdd33-supply
 
 allOf:
   - if:
@@ -72,6 +71,9 @@ allOf:
             - const: susp_clk
             - const: link_aclk
             - const: link_pclk
+      required:
+        - vdd10-supply
+        - vdd33-supply
 
   - if:
       properties:
@@ -86,6 +88,9 @@ allOf:
         clock-names:
           items:
             - const: usbdrd30
+      required:
+        - vdd10-supply
+        - vdd33-supply
 
   - if:
       properties:
@@ -103,6 +108,9 @@ allOf:
             - const: susp_clk
             - const: phyclk
             - const: pipe_pclk
+      required:
+        - vdd10-supply
+        - vdd33-supply
 
   - if:
       properties:
@@ -119,6 +127,25 @@ allOf:
             - const: usbdrd30
             - const: usbdrd30_susp_clk
             - const: usbdrd30_axius_clk
+      required:
+        - vdd10-supply
+        - vdd33-supply
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos7870-dwusb2
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          maxItems: 3
+        clock-names:
+          items:
+            - const: usbdrd20
+            - const: usbdrd20_ctrl_clk
+            - const: usbdrd20_ref_clk
 
   - if:
       properties:
@@ -134,6 +161,9 @@ allOf:
           items:
             - const: bus_early
             - const: ref
+      required:
+        - vdd10-supply
+        - vdd33-supply
 
 additionalProperties: false
 

-- 
2.48.1