To support affinity setting for non wake up external gpio interrupt, add
irq_set_affinity callback using irq number from pinctrl driver data.
Before this patch, changing the irq affinity of gpio interrupt is not
possible:
# cat /proc/irq/418/smp_affinity
3ff
# echo 00f > /proc/irq/418/smp_affinity
# cat /proc/irq/418/smp_affinity
3ff
# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 ...
418: 3631 0 0 0 ...
With this patch applied, it's possible to change irq affinity of gpio
interrupt:
# cat /proc/irq/418/smp_affinity
3ff
# echo 00f > /proc/irq/418/smp_affinity
# cat /proc/irq/418/smp_affinity
00f
# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 ...
418: 3893 201 181 188 ...
Signed-off-by: Youngmin Nam <youngmin.nam@samsung.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Tested-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20231126094618.2545116-1-youngmin.nam@samsung.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
b77f5ef8eb