prefix host names with "Host"

describe.go

@@ -20,7 +20,7 @@ func describeHost() (descriptor, error) {
 	}
 
 	switch host {
-	case RPi:
+	case HostRPi:
 		return rpi.Descriptor(rev), nil
 	default:
 		return nil, errors.New("host: invalid host")

detect.go

@@ -10,9 +10,11 @@ import (
 type Host int
 
 const (
-	Null Host = iota
-	RPi
-	BBB
+	HostNull Host = iota
+	HostRPi
+	HostBBB
+	HostCubieTruck
+	HostGalileo
 )
 
 func execOutput(name string, arg ...string) (output string, err error) {
@@ -67,9 +69,9 @@ func DetectHost() (host Host, rev int, err error) {
 
 	switch node {
 	case "raspberrypi":
-		host = RPi
+		host = HostRPi
 	case "beaglebone":
-		host = BBB
+		host = HostBBB
 	default:
 		err = fmt.Errorf("embd: your host %q is not supported at this moment. please request support at https://github.com/kidoman/embd/issues", node)
 	}

samples/gpiodetect.go

@@ -15,9 +15,9 @@ func main() {
 	var pinNo interface{}
 
 	switch h {
-	case embd.BBB:
+	case embd.HostBBB:
 		pinNo = "P9_31"
-	case embd.RPi:
+	case embd.HostRPi:
 		pinNo = 10
 	default:
 		panic("host not supported (yet :P)")