diff options
| author | Phil Edworthy <phil.edworthy@renesas.com> | 2018-04-26 19:19:47 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-05-16 15:35:24 +0300 |
| commit | e6ca26abd37606ba4864f20c85d3fe4a2173b93f (patch) | |
| tree | 18cab27e25f3380c1f300904034a6823dabd8ec9 /Documentation/devicetree/bindings/gpio | |
| parent | 413f9e991896a98c03da6b3c43dc7791a4d28d9a (diff) | |
| download | linux-e6ca26abd37606ba4864f20c85d3fe4a2173b93f.tar.xz | |
gpio: dwapb: Add support for 1 interrupt per port A GPIO
The DesignWare GPIO IP can be configured for either 1 interrupt or 1
per GPIO in port A, but the driver currently only supports 1 interrupt.
See the DesignWare DW_apb_gpio Databook description of the
'GPIO_INTR_IO' parameter.
This change allows the driver to work with up to 32 interrupts, it will
get as many interrupts as specified in the DT 'interrupts' property.
It doesn't do anything clever with the different interrupts, it just calls
the same handler used for single interrupt hardware.
ACPI companion code provided by Hoan Tran <hotran@apm.com>. This was tested
on X-Gene by Hoan.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt b/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt index 4a75da7051bd..3c1118bc67f5 100644 --- a/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt +++ b/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt @@ -26,8 +26,13 @@ controller. the second encodes the triger flags encoded as described in Documentation/devicetree/bindings/interrupt-controller/interrupts.txt - interrupt-parent : The parent interrupt controller. -- interrupts : The interrupt to the parent controller raised when GPIOs - generate the interrupts. +- interrupts : The interrupts to the parent controller raised when GPIOs + generate the interrupts. If the controller provides one combined interrupt + for all GPIOs, specify a single interrupt. If the controller provides one + interrupt for each GPIO, provide a list of interrupts that correspond to each + of the GPIO pins. When specifying multiple interrupts, if any are unconnected, + use the interrupts-extended property to specify the interrupts and set the + interrupt controller handle for unused interrupts to 0. - snps,nr-gpios : The number of pins in the port, a single cell. - resets : Reset line for the controller. |