Messages in this thread |  | | From | Linus Walleij <> | Date | Mon, 16 Dec 2019 09:32:20 +0100 | Subject | Re: [PATCH v6 13/15] gpio: bd71828: Initial support for ROHM BD71828 PMIC GPIOs |
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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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