Claude review: dt-bindings: bridge: lt8713sx: Add bindings

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

**Missing `enable-gpios` property:** The driver calls `devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH)` but the binding does not document an `enable-gpios` property. If the hardware supports this GPIO, it must be documented in the binding. If it's not a real hardware signal, the driver shouldn't request it.

**Supplies not required:** The `vcc-supply` and `vdd-supply` properties are defined but not listed in `required:`. The driver calls `devm_regulator_get_enable()` for both unconditionally (not optional), so either the bindings should mark them as required, or the driver should handle them being absent. Typically regulators are required:

```yaml
+  vcc-supply:
+    description: Regulator for 3.3V vcc.
+
+  vdd-supply:
+    description: Regulator for 1.1V vdd.
```

These should be in the `required:` list if the driver mandates them.

**`reset-gpios` not required:** Similarly, `reset-gpios` is not in `required:` but the driver does `devm_gpiod_get()` (not `_optional`), meaning it will fail if absent. It should be required in the binding:

```yaml
+  reset-gpios:
+    description: GPIO connected to active low RESET pin.
```

**Port descriptions are vague:** Ports 1, 2, and 3 all say "DP port for DP output from bridge" or "Additional DP port for DP output from bridge". Given the chip supports DP, HDMI, and DP++, the descriptions should clarify what each output actually is, or if they're truly generic, say so explicitly.

**No `maxItems` on reset-gpios:** Standard practice is to add `maxItems: 1` to single GPIO properties.

---
Generated by Claude Code Patch Reviewer