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Input: imagis - add touch key support

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IST3032C (and possibly some other models) has touch keys. Add support
for them to the imagis driver.

Signed-off-by: Duje Mihanović <duje.mihanovic@skole.hr>
Link: https://lore.kernel.org/r/20240306-b4-imagis-keys-v3-3-2c429afa8420@skole.hr
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Duje Mihanović 2024-03-09 21:19:06 -08:00 committed by Dmitry Torokhov
parent 44b6cee041
commit 2d77f70bb7
1 changed files with 29 additions and 1 deletions
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30
drivers/input/touchscreen/imagis.c
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@ -34,6 +34,7 @@
#define IST3038C_AREA_MASK GENMASK(27, 24)
#define IST3038C_FINGER_COUNT_MASK GENMASK(15, 12)
#define IST3038C_FINGER_STATUS_MASK GENMASK(9, 0)
#define IST3032C_KEY_STATUS_MASK GENMASK(20, 16)
struct imagis_properties {
unsigned int interrupt_msg_cmd;
@ -41,6 +42,7 @@ struct imagis_properties {
unsigned int whoami_cmd;
unsigned int whoami_val;
bool protocol_b;
bool touch_keys_supported;
};
struct imagis_ts {
@ -49,6 +51,8 @@ struct imagis_ts {
struct input_dev *input_dev;
struct touchscreen_properties prop;
struct regulator_bulk_data supplies[2];
u32 keycodes[5];
int num_keycodes;
};
static int imagis_i2c_read_reg(struct imagis_ts *ts,
@ -93,7 +97,7 @@ static irqreturn_t imagis_interrupt(int irq, void *dev_id)
{
struct imagis_ts *ts = dev_id;
u32 intr_message, finger_status;
unsigned int finger_count, finger_pressed;
unsigned int finger_count, finger_pressed, key_pressed;
int i;
int error;
@ -140,6 +144,12 @@ static irqreturn_t imagis_interrupt(int irq, void *dev_id)
FIELD_GET(IST3038C_AREA_MASK, finger_status));
}
key_pressed = FIELD_GET(IST3032C_KEY_STATUS_MASK, intr_message);
for (int i = 0; i < ts->num_keycodes; i++)
input_report_key(ts->input_dev, ts->keycodes[i],
key_pressed & BIT(i));
input_mt_sync_frame(ts->input_dev);
input_sync(ts->input_dev);
@ -225,6 +235,23 @@ static int imagis_init_input_dev(struct imagis_ts *ts)
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 16, 0, 0);
if (ts->tdata->touch_keys_supported) {
ts->num_keycodes = of_property_read_variable_u32_array(
ts->client->dev.of_node, "linux,keycodes",
ts->keycodes, 0, ARRAY_SIZE(ts->keycodes));
if (ts->num_keycodes <= 0) {
ts->keycodes[0] = KEY_APPSELECT;
ts->keycodes[1] = KEY_BACK;
ts->num_keycodes = 2;
}
input_dev->keycodemax = ts->num_keycodes;
input_dev->keycodesize = sizeof(ts->keycodes[0]);
input_dev->keycode = ts->keycodes;
}
for (int i = 0; i < ts->num_keycodes; i++)
input_set_capability(input_dev, EV_KEY, ts->keycodes[i]);
touchscreen_parse_properties(input_dev, true, &ts->prop);
if (!ts->prop.max_x || !ts->prop.max_y) {
@ -366,6 +393,7 @@ static const struct imagis_properties imagis_3032c_data = {
.touch_coord_cmd = IST3038C_REG_TOUCH_COORD,
.whoami_cmd = IST3038C_REG_CHIPID,
.whoami_val = IST3032C_WHOAMI,
.touch_keys_supported = true,
};
static const struct imagis_properties imagis_3038b_data = {