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SubjectRe: [PATCH v6 13/15] gpio: bd71828: Initial support for ROHM BD71828 PMIC GPIOs
On Wed, Dec 11, 2019 at 10:49 AM Matti Vaittinen
<matti.vaittinen@fi.rohmeurope.com> wrote:

> ROHM BD71828 PMIC contains 4 pins which can be configured by OTP
> to be used for general purposes. First 3 can be used as outputs
> and 4.th pin can be used as input. Allow them to be controlled
> via GPIO framework.
>
> The driver assumes all of the pins are configured as GPIOs and
> trusts that the reserved pins in other OTP configurations are
> excluded from control using "gpio-reserved-ranges" device tree
> property (or left untouched by GPIO users).
>
> Typical use for 4.th pin (input) is to use it as HALL sensor
> input so that this pin state is toggled when HALL sensor detects
> LID position change (from close to open or open to close). PMIC
> HW implements some extra logic which allows PMIC to power-up the
> system when this pin is toggled. Please see the data sheet for
> details of GPIO options which can be selected by OTP settings.
>
> Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
> Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

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