feat(ezcoo): serial driver for EZCOO HDMI matrix

pkg/ezcoo/config.go

@@ -0,0 +1,35 @@
+package ezcoo
+
+import (
+	"errors"
+	"fmt"
+	"time"
+)
+
+type Config struct {
+	Port         string        `yaml:"port"`
+	Baud         int           `yaml:"baud"`
+	PollInterval time.Duration `yaml:"poll_interval"`
+}
+
+func (c *Config) SetDefaults() {
+	if c.Port == "" {
+		c.Port = "/dev/ttyACM0"
+	}
+	if c.Baud == 0 {
+		c.Baud = 57600
+	}
+	if c.PollInterval == 0 {
+		c.PollInterval = 15 * time.Second
+	}
+}
+
+func (c *Config) Validate() error {
+	if c.Port == "" {
+		return errors.New("device.port is required")
+	}
+	if c.Baud <= 0 {
+		return fmt.Errorf("device.baud must be positive, got %d", c.Baud)
+	}
+	return nil
+}