linux-kernel - [PATCH v3 05/12] dt-bindings: phy: renesas,usb2-phy: Add renesas,sysc-signals

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Message-ID: <20250521140943.3830195-6-claudiu.beznea.uj@bp.renesas.com>
Date: Wed, 21 May 2025 17:09:36 +0300
From: Claudiu <claudiu.beznea@...on.dev>
To: vkoul@...nel.org,
	kishon@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	p.zabel@...gutronix.de,
	geert+renesas@...der.be,
	magnus.damm@...il.com,
	yoshihiro.shimoda.uh@...esas.com,
	kees@...nel.org,
	gustavoars@...nel.org,
	biju.das.jz@...renesas.com
Cc: claudiu.beznea@...on.dev,
	linux-phy@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	linux-hardening@...r.kernel.org,
	john.madieu.xa@...renesas.com,
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: [PATCH v3 05/12] dt-bindings: phy: renesas,usb2-phy: Add renesas,sysc-signals

From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

On the Renesas RZ/G3S SoC, the USB PHY receives a signal from the system
controller that need to be de-asserted/asserted when power is turned
on/off. This signal, called PWRRDY, is controlled through a specific
register in the system controller memory space.

Add the renesas,sysc-signals DT property to describe the relation b/w the
system controller and the USB PHY on the Renesas RZ/G3S. This property
provides a phandle to the system controller, along with the offset within
the system controller memory space that manages the signal and a bitmask
that indicates the specific bits required to control the signal.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
---

Changes in v3:
- replace renesas,sysc-signal with renesas,sysc-signals for case where
  more than 1 signal should be described with this property
- Geert: due to this I dropped you tag

Changes in v2:
- none; this patch is new

 .../bindings/phy/renesas,usb2-phy.yaml        | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
index 12f8d5d8af55..e1e773cba847 100644
--- a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
@@ -86,6 +86,16 @@ properties:
 
   dr_mode: true
 
+  renesas,sysc-signals:
+    description: System controller phandle, specifying the register
+      offset and bitmask associated with a specific system controller signal
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: system controller phandle
+          - description: register offset associated with a signal
+          - description: register bitmask associated with a signal
+
 if:
   properties:
     compatible:
@@ -117,6 +127,18 @@ allOf:
       required:
         - resets
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,usb2-phy-r9a08g045
+    then:
+      required:
+        - renesas,sysc-signals
+    else:
+      properties:
+        renesas,sysc-signals: false
+
 additionalProperties: false
 
 examples:
-- 
2.43.0