Hello Andy, >> From: Alexander Sverdlin <alexander.sverd...@nokia.com> >> >> There are several implementations of PL061 which lack GPIOINTR signal in >> hardware and only have individual GPIOMIS[7:0] interrupts. Use the >> hierarchical interrupt support of the gpiolib in these cases (if at least 8 >> IRQs are configured for the PL061). >> >> One in-tree example is arch/arm/boot/dts/axm55xx.dtsi, PL061 instances have >> 8 IRQs defined, but current driver supports only the first one, so only one >> pin would work as IRQ trigger. > > an IRQ > > I'm wondering if the GPIO library support for IRQ hierarchy is what > you are looking for.
do you have a better suggestion? That's why I reference the below discussion from 2017, where Linus Walleij suggested to use it. Well, the initial patch was just 11-liner and PL061 is rather counterexample and doesn't fit well into the existing hierarchical infrastructure. >> Link: >> https://lore.kernel.org/linux-gpio/CACRpkdZpYzpMDWqJobSYH=jhgb74hbcqihotexs+svyo6sr...@mail.gmail.com/ [...] >> --- a/drivers/gpio/Kconfig >> +++ b/drivers/gpio/Kconfig >> @@ -469,6 +469,7 @@ config GPIO_PL061 >> depends on ARM_AMBA >> select IRQ_DOMAIN >> select GPIOLIB_IRQCHIP >> + select IRQ_DOMAIN_HIERARCHY -- Best regards, Alexander Sverdlin.
