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Input: atmel_mxt_ts - support capacitive keys 

Add support for touch keys found in some Atmel touch controller
configurations.

Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Link: https://lore.kernel.org/r/20230407-atmel_keys-v2-2-92446a4343cb@apitzsch.eu
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
André Apitzsch 2023-05-01 20:16:52 -07:00 committed by Dmitry Torokhov
parent 272a26186a
commit 9780432158
1 changed files with 85 additions and 0 deletions
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85
drivers/input/touchscreen/atmel_mxt_ts.c
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@ -55,6 +55,7 @@
#define MXT_TOUCH_KEYARRAY_T15 15 #define MXT_TOUCH_KEYARRAY_T15 15
#define MXT_TOUCH_PROXIMITY_T23 23 #define MXT_TOUCH_PROXIMITY_T23 23
#define MXT_TOUCH_PROXKEY_T52 52 #define MXT_TOUCH_PROXKEY_T52 52
#define MXT_TOUCH_PTC_KEYS_T97 97
#define MXT_PROCI_GRIPFACE_T20 20 #define MXT_PROCI_GRIPFACE_T20 20
#define MXT_PROCG_NOISE_T22 22 #define MXT_PROCG_NOISE_T22 22
#define MXT_PROCI_ONETOUCH_T24 24 #define MXT_PROCI_ONETOUCH_T24 24
@ -326,9 +327,13 @@ struct mxt_data {
u16 T71_address; u16 T71_address;
u8 T9_reportid_min; u8 T9_reportid_min;
u8 T9_reportid_max; u8 T9_reportid_max;
u8 T15_reportid_min;
u8 T15_reportid_max;
u16 T18_address; u16 T18_address;
u8 T19_reportid; u8 T19_reportid;
u16 T44_address; u16 T44_address;
u8 T97_reportid_min;
u8 T97_reportid_max;
u8 T100_reportid_min; u8 T100_reportid_min;
u8 T100_reportid_max; u8 T100_reportid_max;
@ -344,6 +349,9 @@ struct mxt_data {
u32 *t19_keymap; u32 *t19_keymap;
unsigned int t19_num_keys; unsigned int t19_num_keys;
u32 *t15_keymap;
unsigned int t15_num_keys;
enum mxt_suspend_mode suspend_mode; enum mxt_suspend_mode suspend_mode;
u32 wakeup_method; u32 wakeup_method;
@ -375,6 +383,7 @@ static bool mxt_object_readable(unsigned int type)
case MXT_TOUCH_KEYARRAY_T15: case MXT_TOUCH_KEYARRAY_T15:
case MXT_TOUCH_PROXIMITY_T23: case MXT_TOUCH_PROXIMITY_T23:
case MXT_TOUCH_PROXKEY_T52: case MXT_TOUCH_PROXKEY_T52:
case MXT_TOUCH_PTC_KEYS_T97:
case MXT_TOUCH_MULTITOUCHSCREEN_T100: case MXT_TOUCH_MULTITOUCHSCREEN_T100:
case MXT_PROCI_GRIPFACE_T20: case MXT_PROCI_GRIPFACE_T20:
case MXT_PROCG_NOISE_T22: case MXT_PROCG_NOISE_T22:
@ -891,6 +900,24 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
data->update_input = true; data->update_input = true;
} }
static void mxt_proc_t15_messages(struct mxt_data *data, u8 *message)
{
struct input_dev *input_dev = data->input_dev;
unsigned long keystates = get_unaligned_le32(&message[2]);
int key;
for (key = 0; key < data->t15_num_keys; key++)
input_report_key(input_dev, data->t15_keymap[key],
keystates & BIT(key));
data->update_input = true;
}
static void mxt_proc_t97_messages(struct mxt_data *data, u8 *message)
{
mxt_proc_t15_messages(data, message);
}
static void mxt_proc_t100_message(struct mxt_data *data, u8 *message) static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
{ {
struct device *dev = &data->client->dev; struct device *dev = &data->client->dev;
@ -1017,6 +1044,12 @@ static int mxt_proc_message(struct mxt_data *data, u8 *message)
} else if (report_id >= data->T9_reportid_min && } else if (report_id >= data->T9_reportid_min &&
report_id <= data->T9_reportid_max) { report_id <= data->T9_reportid_max) {
mxt_proc_t9_message(data, message); mxt_proc_t9_message(data, message);
} else if (report_id >= data->T15_reportid_min &&
report_id <= data->T15_reportid_max) {
mxt_proc_t15_messages(data, message);
} else if (report_id >= data->T97_reportid_min &&
report_id <= data->T97_reportid_max) {
mxt_proc_t97_messages(data, message);
} else if (report_id >= data->T100_reportid_min && } else if (report_id >= data->T100_reportid_min &&
report_id <= data->T100_reportid_max) { report_id <= data->T100_reportid_max) {
mxt_proc_t100_message(data, message); mxt_proc_t100_message(data, message);
@ -1689,9 +1722,13 @@ static void mxt_free_object_table(struct mxt_data *data)
data->T71_address = 0; data->T71_address = 0;
data->T9_reportid_min = 0; data->T9_reportid_min = 0;
data->T9_reportid_max = 0; data->T9_reportid_max = 0;
data->T15_reportid_min = 0;
data->T15_reportid_max = 0;
data->T18_address = 0; data->T18_address = 0;
data->T19_reportid = 0; data->T19_reportid = 0;
data->T44_address = 0; data->T44_address = 0;
data->T97_reportid_min = 0;
data->T97_reportid_max = 0;
data->T100_reportid_min = 0; data->T100_reportid_min = 0;
data->T100_reportid_max = 0; data->T100_reportid_max = 0;
data->max_reportid = 0; data->max_reportid = 0;
@ -1764,6 +1801,10 @@ static int mxt_parse_object_table(struct mxt_data *data,
object->num_report_ids - 1; object->num_report_ids - 1;
data->num_touchids = object->num_report_ids; data->num_touchids = object->num_report_ids;
break; break;
case MXT_TOUCH_KEYARRAY_T15:
data->T15_reportid_min = min_id;
data->T15_reportid_max = max_id;
break;
case MXT_SPT_COMMSCONFIG_T18: case MXT_SPT_COMMSCONFIG_T18:
data->T18_address = object->start_address; data->T18_address = object->start_address;
break; break;
@ -1773,6 +1814,10 @@ static int mxt_parse_object_table(struct mxt_data *data,
case MXT_SPT_GPIOPWM_T19: case MXT_SPT_GPIOPWM_T19:
data->T19_reportid = min_id; data->T19_reportid = min_id;
break; break;
case MXT_TOUCH_PTC_KEYS_T97:
data->T97_reportid_min = min_id;
data->T97_reportid_max = max_id;
break;
case MXT_TOUCH_MULTITOUCHSCREEN_T100: case MXT_TOUCH_MULTITOUCHSCREEN_T100:
data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100; data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
data->T100_reportid_min = min_id; data->T100_reportid_min = min_id;
@ -2050,6 +2095,7 @@ static int mxt_initialize_input_device(struct mxt_data *data)
int error; int error;
unsigned int num_mt_slots; unsigned int num_mt_slots;
unsigned int mt_flags = 0; unsigned int mt_flags = 0;
int i;
switch (data->multitouch) { switch (data->multitouch) {
case MXT_TOUCH_MULTI_T9: case MXT_TOUCH_MULTI_T9:
@ -2095,6 +2141,10 @@ static int mxt_initialize_input_device(struct mxt_data *data)
input_dev->open = mxt_input_open; input_dev->open = mxt_input_open;
input_dev->close = mxt_input_close; input_dev->close = mxt_input_close;
input_dev->keycode = data->t15_keymap;
input_dev->keycodemax = data->t15_num_keys;
input_dev->keycodesize = sizeof(data->t15_keymap[0]);
input_set_capability(input_dev, EV_KEY, BTN_TOUCH); input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
/* For single touch */ /* For single touch */
@ -2162,6 +2212,13 @@ static int mxt_initialize_input_device(struct mxt_data *data)
0, 255, 0, 0); 0, 255, 0, 0);
} }
/* For T15 and T97 Key Array */
if (data->T15_reportid_min || data->T97_reportid_min) {
for (i = 0; i < data->t15_num_keys; i++)
input_set_capability(input_dev,
EV_KEY, data->t15_keymap[i]);
}
input_set_drvdata(input_dev, data); input_set_drvdata(input_dev, data);
error = input_register_device(input_dev); error = input_register_device(input_dev);
@ -3080,8 +3137,10 @@ static void mxt_input_close(struct input_dev *dev)
static int mxt_parse_device_properties(struct mxt_data *data) static int mxt_parse_device_properties(struct mxt_data *data)
{ {
static const char keymap_property[] = "linux,gpio-keymap"; static const char keymap_property[] = "linux,gpio-keymap";
static const char buttons_property[] = "linux,keycodes";
struct device *dev = &data->client->dev; struct device *dev = &data->client->dev;
u32 *keymap; u32 *keymap;
u32 *buttonmap;
int n_keys; int n_keys;
int error; int error;
@ -3111,6 +3170,32 @@ static int mxt_parse_device_properties(struct mxt_data *data)
data->t19_num_keys = n_keys; data->t19_num_keys = n_keys;
} }
if (device_property_present(dev, buttons_property)) {
n_keys = device_property_count_u32(dev, buttons_property);
if (n_keys <= 0) {
error = n_keys < 0 ? n_keys : -EINVAL;
dev_err(dev, "invalid/malformed '%s' property: %d\n",
buttons_property, error);
return error;
}
buttonmap = devm_kmalloc_array(dev, n_keys, sizeof(*buttonmap),
GFP_KERNEL);
if (!buttonmap)
return -ENOMEM;
error = device_property_read_u32_array(dev, buttons_property,
buttonmap, n_keys);
if (error) {
dev_err(dev, "failed to parse '%s' property: %d\n",
buttons_property, error);
return error;
}
data->t15_keymap = buttonmap;
data->t15_num_keys = n_keys;
}
return 0; return 0;
} }