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Input: zinitix - add touchkey support

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Zinitix touch controllers can use some of the sense lines for virtual
keys (like those found on many phones). Add support for those keys.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Nikita Travkin <nikita@trvn.ru>
Link: https://lore.kernel.org/r/20240717-zinitix-tkey-v5-2-52ea4cd4bd50@trvn.ru
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Nikita Travkin 2024-07-19 15:03:47 -07:00 committed by Dmitry Torokhov
parent 1dbd1ab556
commit 075d9b22c8
1 changed files with 60 additions and 3 deletions
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63
drivers/input/touchscreen/zinitix.c
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@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
@ -119,6 +120,7 @@
#define DEFAULT_TOUCH_POINT_MODE 2
#define MAX_SUPPORTED_FINGER_NUM 5
#define MAX_SUPPORTED_BUTTON_NUM 8
#define CHIP_ON_DELAY 15 // ms
#define FIRMWARE_ON_DELAY 40 // ms
@ -146,6 +148,8 @@ struct bt541_ts_data {
struct touchscreen_properties prop;
struct regulator_bulk_data supplies[2];
u32 zinitix_mode;
u32 keycodes[MAX_SUPPORTED_BUTTON_NUM];
int num_keycodes;
};
static int zinitix_read_data(struct i2c_client *client,
@ -195,6 +199,7 @@ static int zinitix_init_touch(struct bt541_ts_data *bt541)
struct i2c_client *client = bt541->client;
int i;
int error;
u16 int_flags;
error = zinitix_write_cmd(client, ZINITIX_SWRESET_CMD);
if (error) {
@ -225,6 +230,11 @@ static int zinitix_init_touch(struct bt541_ts_data *bt541)
if (error)
return error;
error = zinitix_write_u16(client, ZINITIX_BUTTON_SUPPORTED_NUM,
bt541->num_keycodes);
if (error)
return error;
error = zinitix_write_u16(client, ZINITIX_INITIAL_TOUCH_MODE,
bt541->zinitix_mode);
if (error)
@ -235,9 +245,11 @@ static int zinitix_init_touch(struct bt541_ts_data *bt541)
if (error)
return error;
error = zinitix_write_u16(client, ZINITIX_INT_ENABLE_FLAG,
BIT_PT_CNT_CHANGE | BIT_DOWN | BIT_MOVE |
BIT_UP);
int_flags = BIT_PT_CNT_CHANGE | BIT_DOWN | BIT_MOVE | BIT_UP;
if (bt541->num_keycodes)
int_flags |= BIT_ICON_EVENT;
error = zinitix_write_u16(client, ZINITIX_INT_ENABLE_FLAG, int_flags);
if (error)
return error;
@ -350,12 +362,22 @@ static void zinitix_report_finger(struct bt541_ts_data *bt541, int slot,
}
}
static void zinitix_report_keys(struct bt541_ts_data *bt541, u16 icon_events)
{
int i;
for (i = 0; i < bt541->num_keycodes; i++)
input_report_key(bt541->input_dev,
bt541->keycodes[i], icon_events & BIT(i));
}
static irqreturn_t zinitix_ts_irq_handler(int irq, void *bt541_handler)
{
struct bt541_ts_data *bt541 = bt541_handler;
struct i2c_client *client = bt541->client;
struct touch_event touch_event;
unsigned long finger_mask;
__le16 icon_events;
int error;
int i;
@ -368,6 +390,17 @@ static irqreturn_t zinitix_ts_irq_handler(int irq, void *bt541_handler)
goto out;
}
if (le16_to_cpu(touch_event.status) & BIT_ICON_EVENT) {
error = zinitix_read_data(bt541->client, ZINITIX_ICON_STATUS_REG,
&icon_events, sizeof(icon_events));
if (error) {
dev_err(&client->dev, "Failed to read icon events\n");
goto out;
}
zinitix_report_keys(bt541, le16_to_cpu(icon_events));
}
finger_mask = touch_event.finger_mask;
for_each_set_bit(i, &finger_mask, MAX_SUPPORTED_FINGER_NUM) {
const struct point_coord *p = &touch_event.point_coord[i];
@ -453,6 +486,7 @@ static int zinitix_init_input_dev(struct bt541_ts_data *bt541)
{
struct input_dev *input_dev;
int error;
int i;
input_dev = devm_input_allocate_device(&bt541->client->dev);
if (!input_dev) {
@ -470,6 +504,14 @@ static int zinitix_init_input_dev(struct bt541_ts_data *bt541)
input_dev->open = zinitix_input_open;
input_dev->close = zinitix_input_close;
if (bt541->num_keycodes) {
input_dev->keycode = bt541->keycodes;
input_dev->keycodemax = bt541->num_keycodes;
input_dev->keycodesize = sizeof(bt541->keycodes[0]);
for (i = 0; i < bt541->num_keycodes; i++)
input_set_capability(input_dev, EV_KEY, bt541->keycodes[i]);
}
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_WIDTH_MAJOR, 0, 255, 0, 0);
@ -534,6 +576,21 @@ static int zinitix_ts_probe(struct i2c_client *client)
return error;
}
bt541->num_keycodes = device_property_count_u32(&client->dev, "linux,keycodes");
if (bt541->num_keycodes > ARRAY_SIZE(bt541->keycodes)) {
dev_err(&client->dev, "too many keys defined (%d)\n", bt541->num_keycodes);
return -EINVAL;
}
error = device_property_read_u32_array(&client->dev, "linux,keycodes",
bt541->keycodes,
bt541->num_keycodes);
if (error) {
dev_err(&client->dev,
"Unable to parse \"linux,keycodes\" property: %d\n", error);
return error;
}
error = zinitix_init_input_dev(bt541);
if (error) {
dev_err(&client->dev,