[PATCH v6 1/2] dt-bindings: usb: Add the binding example for the Genesys Logic GL3523 hub

[Anand Moon <linux.amoon@gmail.com>]

Add the binding example for the USB3.1 Genesys Logic GL3523
integrates with USB 3.1 Gen 1 Super Speed and USB 2.0 High-Speed
hub.

For onboard hub controllers that support USB 3.x and USB 2.0 hubs
with shared resets and power supplies, this property is used to identify
the hubs with which these are shared.

GL3523 has built-in 5V to 3.3V and 5V to 1.2V regulators, which serves
power to the USB HUB, it uses 5V power regulator.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
V6: fix the description of the regulators
Updated the commit message for regulator updates.
add reviewed by Conor Dooley
[1] https://lore.kernel.org/all/20231130053130.21966-2-linux.amoon@gmail.com/
v5: upgrade peer-hub description : Conor Dooley
[0] https://www.genesyslogic.com.tw/en/product_view.php?show=67 [Block Diagram]
v4: Fix the description of peer-hub and update the commit message.
Schematics of the Odroid N2+
https://dn.odroid.com/S922X/ODROID-N2/Schematic/odroid-n2_rev0.6_20210121.pdf
V3: fix the dt_binding_check error, added new example for Genesys GL3523
v2: added Genesys GL3523 binding
v1: none
---
 .../bindings/usb/genesys,gl850g.yaml          | 65 +++++++++++++++++--
 1 file changed, 61 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
index ee08b9c3721f..c6f63a69396d 100644
--- a/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
+++ b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
@@ -9,9 +9,6 @@ title: Genesys Logic USB hub controller
 maintainers:
   - Icenowy Zheng <uwu@icenowy.me>
 
-allOf:
-  - $ref: usb-device.yaml#
-
 properties:
   compatible:
     enum:
@@ -27,12 +24,46 @@ properties:
 
   vdd-supply:
     description:
-      the regulator that provides 3.3V core power to the hub.
+      The regulator that provides 3.3V or 5.0V core power to the hub.
+
+  peer-hub:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      For onboard hub controllers that support USB 3.x and USB 2.0 hubs
+      with shared resets and power supplies, this property is used to identify
+      the hubs with which these are shared.
 
 required:
   - compatible
   - reg
 
+allOf:
+  - $ref: usb-device.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - usb5e3,608
+    then:
+      properties:
+        peer-hub: false
+        vdd-supply: false
+        reset-gpios: true
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - usb5e3,610
+              - usb5e3,620
+    then:
+      properties:
+        peer-hub: true
+        vdd-supply: true
+        reset-gpios: true
+
 additionalProperties: false
 
 examples:
@@ -49,3 +80,29 @@ examples:
             reset-gpios = <&pio 7 2 GPIO_ACTIVE_LOW>;
         };
     };
+
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    usb {
+        dr_mode = "host";
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        /* 2.0 hub on port 1 */
+        hub_2_0: hub@1 {
+            compatible = "usb5e3,610";
+            reg = <1>;
+            peer-hub = <&hub_3_0>;
+            reset-gpios = <&gpio 20 GPIO_ACTIVE_LOW>;
+            vdd-supply = <&vcc_5v>;
+        };
+
+        /* 3.1 hub on port 4 */
+        hub_3_0: hub@2 {
+            compatible = "usb5e3,620";
+            reg = <2>;
+            peer-hub = <&hub_2_0>;
+            reset-gpios = <&gpio 20 GPIO_ACTIVE_LOW>;
+            vdd-supply = <&vcc_5v>;
+        };
+    };
-- 
2.42.0


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