In preparation of raising -Wimplicit-fallthrough to 5, replace all
fall-through comments with the fallthrough attribute pseudo-keyword.

Signed-off-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
---
 hw/input/hid.c     | 3 ++-
 hw/input/tsc2005.c | 4 ++--
 hw/input/tsc210x.c | 2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/hw/input/hid.c b/hw/input/hid.c
index a9c7dd1ce1..15fffc5dfb 100644
--- a/hw/input/hid.c
+++ b/hw/input/hid.c
@@ -250,88 +250,89 @@ static void hid_keyboard_event(DeviceState *dev, QemuConsole *src,
 static void hid_keyboard_process_keycode(HIDState *hs)
 {
     uint8_t hid_code, index, key;
     int i, keycode, slot;
 
     if (hs->n == 0) {
         return;
     }
     slot = hs->head & QUEUE_MASK; QUEUE_INCR(hs->head); hs->n--;
     keycode = hs->kbd.keycodes[slot];
 
     if (!hs->n) {
         trace_hid_kbd_queue_empty();
     }
 
     key = keycode & 0x7f;
     index = key | ((hs->kbd.modifiers & (1 << 8)) >> 1);
     hid_code = hid_usage_keys[index];
     hs->kbd.modifiers &= ~(1 << 8);
 
     switch (hid_code) {
     case 0x00:
         return;
 
     case 0xe0:
         assert(key == 0x1d);
         if (hs->kbd.modifiers & (1 << 9)) {
             /* The hid_codes for the 0xe1/0x1d scancode sequence are 0xe9/0xe0.
              * Here we're processing the second hid_code.  By dropping bit 9
              * and setting bit 8, the scancode after 0x1d will access the
              * second half of the table.
              */
             hs->kbd.modifiers ^= (1 << 8) | (1 << 9);
             return;
         }
         /* fall through to process Ctrl_L */
+        fallthrough;
     case 0xe1 ... 0xe7:
         /* Ctrl_L/Ctrl_R, Shift_L/Shift_R, Alt_L/Alt_R, Win_L/Win_R.
          * Handle releases here, or fall through to process presses.
          */
         if (keycode & (1 << 7)) {
             hs->kbd.modifiers &= ~(1 << (hid_code & 0x0f));
             return;
         }
-        /* fall through */
+        fallthrough;
     case 0xe8 ... 0xe9:
         /* USB modifiers are just 1 byte long.  Bits 8 and 9 of
          * hs->kbd.modifiers implement a state machine that detects the
          * 0xe0 and 0xe1/0x1d sequences.  These bits do not follow the
          * usual rules where bit 7 marks released keys; they are cleared
          * elsewhere in the function as the state machine dictates.
          */
         hs->kbd.modifiers |= 1 << (hid_code & 0x0f);
         return;
 
     case 0xea ... 0xef:
         abort();
 
     default:
         break;
     }
 
     if (keycode & (1 << 7)) {
         for (i = hs->kbd.keys - 1; i >= 0; i--) {
             if (hs->kbd.key[i] == hid_code) {
                 hs->kbd.key[i] = hs->kbd.key[-- hs->kbd.keys];
                 hs->kbd.key[hs->kbd.keys] = 0x00;
                 break;
             }
         }
         if (i < 0) {
             return;
         }
     } else {
         for (i = hs->kbd.keys - 1; i >= 0; i--) {
             if (hs->kbd.key[i] == hid_code) {
                 break;
             }
         }
         if (i < 0) {
             if (hs->kbd.keys < sizeof(hs->kbd.key)) {
                 hs->kbd.key[hs->kbd.keys++] = hid_code;
             }
         } else {
             return;
         }
     }
 }
diff --git a/hw/input/tsc2005.c b/hw/input/tsc2005.c
index db2b80e35f..4f3f1d9d12 100644
--- a/hw/input/tsc2005.c
+++ b/hw/input/tsc2005.c
@@ -234,70 +234,70 @@ static void tsc2005_write(TSC2005State *s, int reg, uint16_t data)
 /* This handles most of the chip's logic.  */
 static void tsc2005_pin_update(TSC2005State *s)
 {
     int64_t expires;
     bool pin_state;
 
     switch (s->pin_func) {
     case 0:
         pin_state = !s->pressure && !!s->dav;
         break;
     case 1:
     case 3:
     default:
         pin_state = !s->dav;
         break;
     case 2:
         pin_state = !s->pressure;
     }
 
     if (pin_state != s->irq) {
         s->irq = pin_state;
         qemu_set_irq(s->pint, s->irq);
     }
 
     switch (s->nextfunction) {
     case TSC_MODE_XYZ_SCAN:
     case TSC_MODE_XY_SCAN:
         if (!s->host_mode && s->dav)
             s->enabled = false;
         if (!s->pressure)
             return;
-        /* Fall through */
+        fallthrough;
     case TSC_MODE_AUX_SCAN:
         break;
 
     case TSC_MODE_X:
     case TSC_MODE_Y:
     case TSC_MODE_Z:
         if (!s->pressure)
             return;
-        /* Fall through */
+        fallthrough;
     case TSC_MODE_AUX:
     case TSC_MODE_TEMP1:
     case TSC_MODE_TEMP2:
     case TSC_MODE_X_TEST:
     case TSC_MODE_Y_TEST:
     case TSC_MODE_TS_TEST:
         if (s->dav)
             s->enabled = false;
         break;
 
     case TSC_MODE_RESERVED:
     case TSC_MODE_XX_DRV:
     case TSC_MODE_YY_DRV:
     case TSC_MODE_YX_DRV:
     default:
         return;
     }
 
     if (!s->enabled || s->busy)
         return;
 
     s->busy = true;
     s->precision = s->nextprecision;
     s->function = s->nextfunction;
     s->pdst = !s->pnd0;	/* Synchronised on internal clock */
     expires = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
         (NANOSECONDS_PER_SECOND >> 7);
     timer_mod(s->timer, expires);
 }
diff --git a/hw/input/tsc210x.c b/hw/input/tsc210x.c
index 950506fb38..9ae426e1a6 100644
--- a/hw/input/tsc210x.c
+++ b/hw/input/tsc210x.c
@@ -774,70 +774,70 @@ static void tsc2102_audio_register_write(
 /* This handles most of the chip logic.  */
 static void tsc210x_pin_update(TSC210xState *s)
 {
     int64_t expires;
     bool pin_state;
 
     switch (s->pin_func) {
     case 0:
         pin_state = s->pressure;
         break;
     case 1:
         pin_state = !!s->dav;
         break;
     case 2:
     default:
         pin_state = s->pressure && !s->dav;
     }
 
     if (!s->enabled)
         pin_state = false;
 
     if (pin_state != s->irq) {
         s->irq = pin_state;
         qemu_set_irq(s->pint, !s->irq);
     }
 
     switch (s->nextfunction) {
     case TSC_MODE_XY_SCAN:
     case TSC_MODE_XYZ_SCAN:
         if (!s->pressure)
             return;
         break;
 
     case TSC_MODE_X:
     case TSC_MODE_Y:
     case TSC_MODE_Z:
         if (!s->pressure)
             return;
-        /* Fall through */
+        fallthrough;
     case TSC_MODE_BAT1:
     case TSC_MODE_BAT2:
     case TSC_MODE_AUX:
     case TSC_MODE_TEMP1:
     case TSC_MODE_TEMP2:
         if (s->dav)
             s->enabled = false;
         break;
 
     case TSC_MODE_AUX_SCAN:
     case TSC_MODE_PORT_SCAN:
         break;
 
     case TSC_MODE_NO_SCAN:
     case TSC_MODE_XX_DRV:
     case TSC_MODE_YY_DRV:
     case TSC_MODE_YX_DRV:
     default:
         return;
     }
 
     if (!s->enabled || s->busy || s->dav)
         return;
 
     s->busy = true;
     s->precision = s->nextprecision;
     s->function = s->nextfunction;
     expires = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
         (NANOSECONDS_PER_SECOND >> 10);
     timer_mod(s->timer, expires);
 }
-- 
2.39.2