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gpio: dwapb: Add support for 1 interrupt per port A GPIO

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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>
This commit is contained in:
Phil Edworthy
2018-04-26 17:19:47 +01:00
committed by Linus Walleij
parent 413f9e9918
commit e6ca26abd3
4 changed files with 48 additions and 13 deletions
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3
include/linux/platform_data/gpio-dwapb.h
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@@ -19,7 +19,8 @@ struct dwapb_port_property {
unsigned int idx;
unsigned int ngpio;
unsigned int gpio_base;
unsigned int irq;
unsigned int irq[32];
bool has_irq;
bool irq_shared;
};