diff options
| author | Russell King <rmk+kernel@armlinux.org.uk> | 2016-08-31 08:49:44 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-03-24 14:04:46 +0100 |
| commit | 380639c7cc786ec663e43eb3896ccf9172a46900 (patch) | |
| tree | b51574a49f52ff542c8c915a582450ac06de68b8 /drivers/gpio/Kconfig | |
| parent | c65d1fd350fa28de79e86e18ef73b902a67c791a (diff) | |
gpio: add generic single-register fixed-direction GPIO driver
Add a simple, generic, single register fixed-direction GPIO driver.
This is able to support a single register with a mixture of inputs
and outputs.
This is different from gpio-mmio and gpio-74xx-mmio:
* gpio-mmio doesn't allow a fixed direction, it assumes there is always
a direction register.
* gpio-74xx-mmio only supports all-in or all-out setups
* gpio-74xx-mmio is DT only, this needs to support legacy too
* they don't double-read when getting the GPIO value, as required by
some implementations that this driver supports
* we need to always do 32-bit reads, which bgpio doesn't guarantee
* the current output state may not be readable from the hardware
register - reading may reflect input status but not output status.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/Kconfig')
| -rw-r--r-- | drivers/gpio/Kconfig | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index d6e3cfd54848..63ceed246b6f 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -380,6 +380,12 @@ config GPIO_RCAR help Say yes here to support GPIO on Renesas R-Car SoCs. +config GPIO_REG + bool + help + A 32-bit single register GPIO fixed in/out implementation. This + can be used to represent any register as a set of GPIO signals. + config GPIO_SPEAR_SPICS bool "ST SPEAr13xx SPI Chip Select as GPIO support" depends on PLAT_SPEAR |