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Input: wacom_i2c - Add support for vdd regulator 

Add support for a VDD regulator. This allows the kernel to prove the
Wacom-I2C device on the rM2.

Signed-off-by: Alistair Francis <alistair@alistair23.me>
rM2-mainline
Alistair Francis 2021-01-20 22:28:31 -08:00
parent 42f9e302e1
commit b54e976e77
1 changed files with 18 additions and 0 deletions
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18
drivers/input/touchscreen/wacom_i2c.c
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@ -13,6 +13,7 @@
#include <linux/irq.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <linux/of.h>
#include <asm/unaligned.h>
@ -56,6 +57,7 @@ struct wacom_i2c {
struct i2c_client *client;
struct input_dev *input;
struct touchscreen_properties props;
struct regulator *vdd;
u8 data[WACOM_QUERY_SIZE];
bool prox;
int tool;
@ -221,6 +223,20 @@ static int wacom_i2c_probe(struct i2c_client *client,
goto err_free_mem;
}
wac_i2c->vdd = regulator_get(&client->dev, "vdd");
if (IS_ERR(wac_i2c->vdd)) {
error = PTR_ERR(wac_i2c->vdd);
kfree(wac_i2c);
return error;
}
error = regulator_enable(wac_i2c->vdd);
if (error) {
regulator_put(wac_i2c->vdd);
kfree(wac_i2c);
return error;
}
wac_i2c->client = client;
wac_i2c->input = input;
@ -277,6 +293,8 @@ static int wacom_i2c_probe(struct i2c_client *client,
err_free_irq:
free_irq(client->irq, wac_i2c);
err_free_mem:
regulator_disable(wac_i2c->vdd);
regulator_put(wac_i2c->vdd);
input_free_device(input);
kfree(wac_i2c);