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| author |   Stephan Gerhold <stephan@gerhold.net> | 2020-12-09 19:39:07 -0800 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-12-09 19:47:11 -0800 |
| commit | 7002932325ef8efff354a70b93a63dcdbca20d81 (patch) | |
| tree | 5b54829d3543d9c03433f3aa4995de6687c09544 /drivers/input | |
| parent | dt-bindings: input: tm2-touchkey: document vddio-supply (diff) | |
| download | linux-dev-7002932325ef8efff354a70b93a63dcdbca20d81.tar.xz linux-dev-7002932325ef8efff354a70b93a63dcdbca20d81.zip | |
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.c | 3 |
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); |