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authorStephan Gerhold <stephan@gerhold.net>2020-12-10 06:39:07 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2020-12-10 06:47:11 +0300
commit7002932325ef8efff354a70b93a63dcdbca20d81 (patch)
tree5b54829d3543d9c03433f3aa4995de6687c09544 /drivers/input
parent3e730ec11d51283ad62a98436967c01b718132ab (diff)
downloadlinux-7002932325ef8efff354a70b93a63dcdbca20d81.tar.xz
Input: tm2-touchkey - add vddio regulator
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. Signed-off-by: Stephan Gerhold <stephan@gerhold.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20201203131242.44397-3-stephan@gerhold.net Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/keyboard/tm2-touchkey.c3
1 files changed, 2 insertions, 1 deletions
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);