The Samsung touchkey controllers are often used with external pull-up
for the interrupt line and the I2C lines, so we might need to enable
a regulator to bring the lines into usable state. Otherwise, this might
cause spurious interrupts and reading from I2C will fail.
Implement support for a "vddio-supply" that is enabled by the
tm2-touchkey driver so that the regulator gets enabled when needed.
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx>
---
drivers/input/keyboard/tm2-touchkey.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/input/keyboard/tm2-touchkey.c b/drivers/input/keyboard/tm2-touchkey.c
index fb078e049413..6218b1c682ef 100644
--- a/drivers/input/keyboard/tm2-touchkey.c
+++ b/drivers/input/keyboard/tm2-touchkey.c
@@ -48,7 +48,7 @@ struct tm2_touchkey_data {
struct input_dev *input_dev;
struct led_classdev led_dev;
struct regulator *vdd;
- struct regulator_bulk_data regulators[2];
+ struct regulator_bulk_data regulators[3];
const struct touchkey_variant *variant;
u32 keycodes[4];
int num_keycodes;
@@ -204,6 +204,7 @@ static int tm2_touchkey_probe(struct i2c_client *client,
touchkey->regulators[0].supply = "vcc";
touchkey->regulators[1].supply = "vdd";
+ touchkey->regulators[2].supply = "vddio";
error = devm_regulator_bulk_get(&client->dev,
ARRAY_SIZE(touchkey->regulators),
touchkey->regulators);
--
2.29.2
