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SubjectRe: [PATCH v6] gpio: dwapb: Add support for 1 interrupt per port A GPIO
On Wed, 16 May 2018, Hoan Tran wrote:

> Hi Phil,
>
> On 5/11/18, 1:31 AM, "Phil Edworthy" <phil.edworthy@renesas.com> 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.edworthy@renesas.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Acked-by: Lee Jones <lee.jones@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.
>
> Acked-by: Hoan Tran <hoan.tran@amperecomputing.com>

Well that's new. I've never seen a mailer reply like that before.

Which mailer are you using? Might be worth sorting that out.

--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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