diff options
| author | Quentin Schulz <quentin.schulz@bootlin.com> | 2018-07-25 14:26:21 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-08-06 13:00:17 +0200 |
| commit | be36abb71d878f3320412a84e6bbec8dd796010c (patch) | |
| tree | 21b80e5e6c09b818ab62d47473a8ac1f116078fe /drivers/pinctrl/Kconfig | |
| parent | pinctrl: intel: Don't shadow error code of gpiochip_lock_as_irq() (diff) | |
| download | linux-be36abb71d878f3320412a84e6bbec8dd796010c.tar.xz linux-be36abb71d878f3320412a84e6bbec8dd796010c.zip | |
pinctrl: ocelot: add support for interrupt controller
This GPIO controller can serve as an interrupt controller as well on the
GPIOs it handles.
An interrupt is generated whenever a GPIO line changes and the
interrupt for this GPIO line is enabled. This means that both the
changes from low to high and high to low generate an interrupt.
For some use cases, it makes sense to ignore the high to low change and
not generate an interrupt. Such a use case is a line that is hold in a
level high/low manner until the event holding the line gets acked.
This can be achieved by making sure the interrupt on the GPIO controller
side gets acked and masked only after the line gets hold in its default
state, this is what's done with the fasteoi functions.
Only IRQ_TYPE_EDGE_BOTH and IRQ_TYPE_LEVEL_HIGH are supported for now.
Signed-off-by: Quentin Schulz <quentin.schulz@bootlin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/Kconfig')
| -rw-r--r-- | drivers/pinctrl/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 522782d1ea49..8d4b7e999f02 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -332,6 +332,7 @@ config PINCTRL_OCELOT depends on OF depends on MSCC_OCELOT || COMPILE_TEST select GPIOLIB + select GPIOLIB_IRQCHIP select GENERIC_PINCONF select GENERIC_PINCTRL_GROUPS select GENERIC_PINMUX_FUNCTIONS |