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HID: Add map_msc() to avoid boilerplate code 

Since we are going to have more MSC events too, add map_msc() that can
be used to fill in necessary fields and avoid boilerplate code.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Tero Kristo <tero.kristo@linux.intel.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211210111138.1248187-2-tero.kristo@linux.intel.com
This commit is contained in:
Mika Westerberg 2021-12-10 13:11:34 +02:00 committed by Benjamin Tissoires
parent f65a0b1f3e
commit 8aa45b544d
2 changed files with 6 additions and 4 deletions
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6
drivers/hid/hid-input.c
View File

@ -52,6 +52,7 @@ static const struct {
#define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
#define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
#define map_led(c) hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
#define map_msc(c) hid_map_usage(hidinput, usage, &bit, &max, EV_MSC, (c))
#define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \
&max, EV_ABS, (c))
@ -874,10 +875,7 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
case 0x5b: /* TransducerSerialNumber */
case 0x6e: /* TransducerSerialNumber2 */
usage->type = EV_MSC;
usage->code = MSC_SERIAL;
bit = input->mscbit;
max = MSC_MAX;
map_msc(MSC_SERIAL);
break;
default: goto unknown;

4
include/linux/hid.h
View File

@ -1010,6 +1010,10 @@ static inline void hid_map_usage(struct hid_input *hidinput,
bmap = input->ledbit;
limit = LED_MAX;
break;
case EV_MSC:
bmap = input->mscbit;
limit = MSC_MAX;
break;
}
if (unlikely(c > limit || !bmap)) {