xpadneo, keyboard: Add keyboard support

Signed-off-by: Kai Krakow <[email protected]>

hid-xpadneo/src/Makefile

@@ -9,4 +9,4 @@ hid-xpadneo-y += xpadneo.o
 $(obj)/xpadneo.c: $(src)/hid-xpadneo.c
 	cp $< $@
 
-hid-xpadneo-y += xpadneo/core.o xpadneo/consumer.o
+hid-xpadneo-y += xpadneo/core.o xpadneo/consumer.o xpadneo/keyboard.o

hid-xpadneo/src/hid-xpadneo.c

@@ -1165,6 +1165,10 @@ static int xpadneo_probe(struct hid_device *hdev, const struct hid_device_id *id
 	if (ret)
 		return ret;
 
+	ret = xpadneo_init_keyboard(xdata);
+	if (ret)
+		return ret;
+
 	ret = xpadneo_init_hw(hdev);
 	if (ret) {
 		hid_err(hdev, "hw init failed: %d\n", ret);

hid-xpadneo/src/xpadneo.h

@@ -184,6 +184,7 @@ struct xpadneo_devdata {
 };
 
 extern int xpadneo_init_consumer(struct xpadneo_devdata *);
+extern int xpadneo_init_keyboard(struct xpadneo_devdata *);
 extern int xpadneo_init_synthetic(struct xpadneo_devdata *, char *, struct input_dev **);
 
 #endif

hid-xpadneo/src/xpadneo/keyboard.c

@@ -0,0 +1,32 @@
+/*
+ * xpadneo keyboard driver
+ *
+ * Copyright (c) 2021 Kai Krakow <[email protected]>
+ */
+
+#include "../xpadneo.h"
+
+extern int xpadneo_init_keyboard(struct xpadneo_devdata *xdata)
+{
+	struct hid_device *hdev = xdata->hdev;
+	int ret, synth = 0;
+
+	if (!xdata->keyboard) {
+		synth = 1;
+		ret = xpadneo_init_synthetic(xdata, "Keyboard", &xdata->keyboard);
+		if (ret || !xdata->keyboard)
+			return ret;
+	}
+
+	if (synth) {
+		ret = input_register_device(xdata->keyboard);
+		if (ret) {
+			hid_err(hdev, "failed to register keyboard\n");
+			return ret;
+		}
+
+		hid_info(hdev, "keyboard added\n");
+	}
+
+	return 0;
+}