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Subject[PATCH 1/8] Input: tm2-touchkey: Add support for midas touchkey
Date
From: Simon Shields <simon@lineageos.org>

The touchkey on midas boards is almost identical.
The only real difference is that it uses the same register for both
keycode and base.

Signed-off-by: Simon Shields <simon@lineageos.org>
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
---
drivers/input/keyboard/tm2-touchkey.c | 48 ++++++++++++++++++++++-----
1 file changed, 39 insertions(+), 9 deletions(-)

diff --git a/drivers/input/keyboard/tm2-touchkey.c b/drivers/input/keyboard/tm2-touchkey.c
index abc266e40e17..37a5ced24009 100644
--- a/drivers/input/keyboard/tm2-touchkey.c
+++ b/drivers/input/keyboard/tm2-touchkey.c
@@ -22,12 +22,13 @@
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/pm.h>
#include <linux/regulator/consumer.h>

-#define TM2_TOUCHKEY_DEV_NAME "tm2-touchkey"
-#define TM2_TOUCHKEY_KEYCODE_REG 0x03
-#define TM2_TOUCHKEY_BASE_REG 0x00
+#define TM2_TOUCHKEY_DEV_NAME "tm2-touchkey"
+#define MIDAS_TOUCHKEY_DEV_NAME "midas-touchkey"
+
#define TM2_TOUCHKEY_CMD_LED_ON 0x10
#define TM2_TOUCHKEY_CMD_LED_OFF 0x20
#define TM2_TOUCHKEY_BIT_PRESS_EV BIT(3)
@@ -40,12 +41,31 @@ enum {
TM2_TOUCHKEY_KEY_BACK,
};

+struct touchkey_variant {
+ const char *name;
+ u8 keycode_reg;
+ u8 base_reg;
+};
+
struct tm2_touchkey_data {
struct i2c_client *client;
struct input_dev *input_dev;
struct led_classdev led_dev;
struct regulator *vdd;
struct regulator_bulk_data regulators[2];
+ struct touchkey_variant *variant;
+};
+
+static struct touchkey_variant tm2_touchkey_variant = {
+ .name = "tm2-touchkey",
+ .keycode_reg = 0x03,
+ .base_reg = 0x00,
+};
+
+static struct touchkey_variant midas_touchkey_variant = {
+ .name = "midas-touchkey",
+ .keycode_reg = 0x00,
+ .base_reg = 0x00,
};

static void tm2_touchkey_led_brightness_set(struct led_classdev *led_dev,
@@ -66,7 +86,7 @@ static void tm2_touchkey_led_brightness_set(struct led_classdev *led_dev,

regulator_set_voltage(touchkey->vdd, volt, volt);
i2c_smbus_write_byte_data(touchkey->client,
- TM2_TOUCHKEY_BASE_REG, data);
+ touchkey->variant->base_reg, data);
}

static int tm2_touchkey_power_enable(struct tm2_touchkey_data *touchkey)
@@ -99,7 +119,7 @@ static irqreturn_t tm2_touchkey_irq_handler(int irq, void *devid)
int key;

data = i2c_smbus_read_byte_data(touchkey->client,
- TM2_TOUCHKEY_KEYCODE_REG);
+ touchkey->variant->keycode_reg);
if (data < 0) {
dev_err(&touchkey->client->dev,
"failed to read i2c data: %d\n", data);
@@ -153,6 +173,9 @@ static int tm2_touchkey_probe(struct i2c_client *client,
touchkey->client = client;
i2c_set_clientdata(client, touchkey);

+ touchkey->variant = (struct touchkey_variant *)
+ of_device_get_match_data(&client->dev);
+
touchkey->regulators[0].supply = "vcc";
touchkey->regulators[1].supply = "vdd";
error = devm_regulator_bulk_get(&client->dev,
@@ -187,7 +210,7 @@ static int tm2_touchkey_probe(struct i2c_client *client,
return -ENOMEM;
}

- touchkey->input_dev->name = TM2_TOUCHKEY_DEV_NAME;
+ touchkey->input_dev->name = touchkey->variant->name;
touchkey->input_dev->id.bustype = BUS_I2C;

input_set_capability(touchkey->input_dev, EV_KEY, KEY_PHONE);
@@ -203,7 +226,7 @@ static int tm2_touchkey_probe(struct i2c_client *client,
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, tm2_touchkey_irq_handler,
IRQF_ONESHOT,
- TM2_TOUCHKEY_DEV_NAME, touchkey);
+ touchkey->variant->name, touchkey);
if (error) {
dev_err(&client->dev,
"failed to request threaded irq: %d\n", error);
@@ -211,7 +234,7 @@ static int tm2_touchkey_probe(struct i2c_client *client,
}

/* led device */
- touchkey->led_dev.name = TM2_TOUCHKEY_DEV_NAME;
+ touchkey->led_dev.name = touchkey->variant->name;
touchkey->led_dev.brightness = LED_FULL;
touchkey->led_dev.max_brightness = LED_ON;
touchkey->led_dev.brightness_set = tm2_touchkey_led_brightness_set;
@@ -257,12 +280,19 @@ static SIMPLE_DEV_PM_OPS(tm2_touchkey_pm_ops,

static const struct i2c_device_id tm2_touchkey_id_table[] = {
{ TM2_TOUCHKEY_DEV_NAME, 0 },
+ { MIDAS_TOUCHKEY_DEV_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, tm2_touchkey_id_table);

static const struct of_device_id tm2_touchkey_of_match[] = {
- { .compatible = "cypress,tm2-touchkey", },
+ {
+ .compatible = "cypress,tm2-touchkey",
+ .data = &tm2_touchkey_variant,
+ }, {
+ .compatible = "cypress,midas-touchkey",
+ .data = &midas_touchkey_variant,
+ },
{ },
};
MODULE_DEVICE_TABLE(of, tm2_touchkey_of_match);
--
2.17.1
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