diff options
| author | Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> | 2020-01-20 15:47:37 +0200 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2020-01-24 07:23:10 +0000 |
| commit | c31f625d06c9166f753a2f21ac9c3f859647ca9f (patch) | |
| tree | ce2e9d7b5f5e18b7b339240d11ae45ed76e94413 /drivers/gpio/Kconfig | |
| parent | fe5a591b7814ffbc90aff661aeb8264937002f54 (diff) | |
| download | linux-c31f625d06c9166f753a2f21ac9c3f859647ca9f.tar.bz2 | |
gpio: bd71828: Initial support for ROHM BD71828 PMIC GPIOs
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>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/gpio/Kconfig')
| -rw-r--r-- | drivers/gpio/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 8adffd42f8cb..68adc1b94dda 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1021,6 +1021,18 @@ config GPIO_BD70528 This driver can also be built as a module. If so, the module will be called gpio-bd70528. +config GPIO_BD71828 + tristate "ROHM BD71828 GPIO support" + depends on MFD_ROHM_BD71828 + help + Support for GPIOs on ROHM BD71828 PMIC. There are three GPIOs + available on the ROHM PMIC in total. The GPIOs are limited to + outputs only and pins must be configured to GPIO outputs by + OTP. Enable this only if you want to use these pins as outputs. + + This driver can also be built as a module. If so, the module + will be called gpio-bd71828. + config GPIO_BD9571MWV tristate "ROHM BD9571 GPIO support" depends on MFD_BD9571MWV |