hw/input/tsc210x: Extract common init code into new function

This deduplicates several lines and will make future changes more
concise.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <1d75877cf4cc2a38f87633ff16f9fea3e1bb0c03.1650874791.git.mkletzan@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/input/tsc210x.c

@@ -30,6 +30,7 @@
 #include "hw/input/tsc2xxx.h"
 #include "hw/irq.h"
 #include "migration/vmstate.h"
+#include "qapi/error.h"
 
 #define TSC_DATA_REGISTERS_PAGE		0x0
 #define TSC_CONTROL_REGISTERS_PAGE	0x1
@@ -1069,20 +1070,10 @@ static const VMStateDescription vmstate_tsc2301 = {
     .fields = vmstatefields_tsc210x,
 };
 
-uWireSlave *tsc2102_init(qemu_irq pint)
+static void tsc210x_init(TSC210xState *s,
+                         const char *name,
+                         const VMStateDescription *vmsd)
 {
-    TSC210xState *s;
-
-    s = g_new0(TSC210xState, 1);
-    s->x = 160;
-    s->y = 160;
-    s->pressure = 0;
-    s->precision = s->nextprecision = 0;
-    s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, tsc210x_timer_tick, s);
-    s->pint = pint;
-    s->model = 0x2102;
-    s->name = "tsc2102";
-
     s->tr[0] = 0;
     s->tr[1] = 1;
     s->tr[2] = 1;
@@ -1104,13 +1095,29 @@ uWireSlave *tsc2102_init(qemu_irq pint)
 
     tsc210x_reset(s);
 
-    qemu_add_mouse_event_handler(tsc210x_touchscreen_event, s, 1,
-                    "QEMU TSC2102-driven Touchscreen");
+    qemu_add_mouse_event_handler(tsc210x_touchscreen_event, s, 1, name);
 
     AUD_register_card(s->name, &s->card);
 
     qemu_register_reset((void *) tsc210x_reset, s);
-    vmstate_register(NULL, 0, &vmstate_tsc2102, s);
+    vmstate_register(NULL, 0, vmsd, s);
+}
+
+uWireSlave *tsc2102_init(qemu_irq pint)
+{
+    TSC210xState *s;
+
+    s = g_new0(TSC210xState, 1);
+    s->x = 160;
+    s->y = 160;
+    s->pressure = 0;
+    s->precision = s->nextprecision = 0;
+    s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, tsc210x_timer_tick, s);
+    s->pint = pint;
+    s->model = 0x2102;
+    s->name = "tsc2102";
+
+    tsc210x_init(s, "QEMU TSC2102-driven Touchscreen", &vmstate_tsc2102);
 
     return &s->chip;
 }
@@ -1131,34 +1138,7 @@ uWireSlave *tsc2301_init(qemu_irq penirq, qemu_irq kbirq, qemu_irq dav)
     s->model = 0x2301;
     s->name = "tsc2301";
 
-    s->tr[0] = 0;
-    s->tr[1] = 1;
-    s->tr[2] = 1;
-    s->tr[3] = 0;
-    s->tr[4] = 1;
-    s->tr[5] = 0;
-    s->tr[6] = 1;
-    s->tr[7] = 0;
-
-    s->chip.opaque = s;
-    s->chip.send = (void *) tsc210x_write;
-    s->chip.receive = (void *) tsc210x_read;
-
-    s->codec.opaque = s;
-    s->codec.tx_swallow = (void *) tsc210x_i2s_swallow;
-    s->codec.set_rate = (void *) tsc210x_i2s_set_rate;
-    s->codec.in.fifo = s->in_fifo;
-    s->codec.out.fifo = s->out_fifo;
-
-    tsc210x_reset(s);
-
-    qemu_add_mouse_event_handler(tsc210x_touchscreen_event, s, 1,
-                    "QEMU TSC2301-driven Touchscreen");
-
-    AUD_register_card(s->name, &s->card);
-
-    qemu_register_reset((void *) tsc210x_reset, s);
-    vmstate_register(NULL, 0, &vmstate_tsc2301, s);
+    tsc210x_init(s, "QEMU TSC2301-driven Touchscreen", &vmstate_tsc2301);
 
     return &s->chip;
 }