On Fri, Jan 17, 2020 at 11:21 AM Lee Jones <lee.jones@xxxxxxxxxx> wrote: > On Fri, 17 Jan 2020, Matti Vaittinen 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@xxxxxxxxxxxxxxxxx> > > Reviewed-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> > > > Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> > > Linus, Is that an Ack? Yes! Feel free to merge this. Yours, Linus Walleij
