On Fri, May 11, 2018 at 09:31:37AM +0100, Phil Edworthy wrote: > 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. > > Signed-off-by: Phil Edworthy <phil.edwor...@renesas.com> > Reviewed-by: Rob Herring <r...@kernel.org> > Acked-by: Lee Jones <lee.jo...@linaro.org> > --- > One point to mention is that I have made it possible for users to have > unconnected interrupts by specifying holes in the list of interrupts. This is > done by supporting the interrupts-extended DT prop. > However, I have no use for this and had to hack some test case for this. > Perhaps the driver should support 1 interrupt or all GPIOa as interrupts? > > v6: > - Treat DT and ACPI the same as much as possible. Note that we can't use > platform_get_irq() to get the DT interrupts as they are in the port > sub-node and hence do not have an associated platform device. > v5: > - Rolled ACPI companion code provided by Hoan Tran into this patch. > v4: > - Use of_irq_get() instead of of_irq_parse_one()+irq_create_of_mapping() > v3: > - Rolled mfd: intel_quark_i2c_gpio fix into this patch to avoid bisect > problems > v2: > - Replaced interrupt-mask DT prop with support for the interrupts-extended > prop. This means replacing the call to irq_of_parse_and_map() with calls > to of_irq_parse_one() and irq_create_of_mapping(). > --- > .../devicetree/bindings/gpio/snps-dwapb-gpio.txt | 9 +++- > drivers/gpio/gpio-dwapb.c | 49 > +++++++++++++++------- > drivers/mfd/intel_quark_i2c_gpio.c | 3 +- > include/linux/platform_data/gpio-dwapb.h | 3 +- > 4 files changed, 45 insertions(+), 19 deletions(-) > > diff --git a/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt > b/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt > index 4a75da7..3c1118b 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.
An enhanced example might be helpful. That not withstanding: Reviewed-by: Simon Horman <horms+rene...@verge.net.au>
