diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-10-20 15:35:25 +0800 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-11-26 13:12:12 +0000 |
| commit | a90335c2dfb4ffe572816f77a3c4f2d1d388d724 (patch) | |
| tree | e3bfec36cd07549017475549b1af0a2ee7501e8c /drivers/irqchip | |
| parent | 1be356c9326d68c9b0161ca004a41f203864d7ee (diff) | |
| download | linux-a90335c2dfb4ffe572816f77a3c4f2d1d388d724.tar.bz2 | |
irqchip/loongson-eiointc: Add suspend/resume support
Add suspend/resume support for EIOINTC irqchip, which is needed for
upcoming suspend/hibernation.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221020073527.541845-3-chenhuacai@loongson.cn
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-loongson-eiointc.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c index 16e9af8d8b1e..5cf4b800e499 100644 --- a/drivers/irqchip/irq-loongson-eiointc.c +++ b/drivers/irqchip/irq-loongson-eiointc.c @@ -17,6 +17,7 @@ #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/of_platform.h> +#include <linux/syscore_ops.h> #define EIOINTC_REG_NODEMAP 0x14a0 #define EIOINTC_REG_IPMAP 0x14c0 @@ -301,6 +302,37 @@ static struct irq_domain *acpi_get_vec_parent(int node, struct acpi_vector_group return NULL; } +static int eiointc_suspend(void) +{ + return 0; +} + +static void eiointc_resume(void) +{ + int i, j; + struct irq_desc *desc; + struct irq_data *irq_data; + + eiointc_router_init(0); + + for (i = 0; i < nr_pics; i++) { + for (j = 0; j < VEC_COUNT; j++) { + desc = irq_resolve_mapping(eiointc_priv[i]->eiointc_domain, j); + if (desc && desc->handle_irq && desc->handle_irq != handle_bad_irq) { + raw_spin_lock(&desc->lock); + irq_data = &desc->irq_data; + eiointc_set_irq_affinity(irq_data, irq_data->common->affinity, 0); + raw_spin_unlock(&desc->lock); + } + } + } +} + +static struct syscore_ops eiointc_syscore_ops = { + .suspend = eiointc_suspend, + .resume = eiointc_resume, +}; + static int __init pch_pic_parse_madt(union acpi_subtable_headers *header, const unsigned long end) @@ -380,6 +412,7 @@ int __init eiointc_acpi_init(struct irq_domain *parent, parent_irq = irq_create_mapping(parent, acpi_eiointc->cascade); irq_set_chained_handler_and_data(parent_irq, eiointc_irq_dispatch, priv); + register_syscore_ops(&eiointc_syscore_ops); cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_LOONGARCH_STARTING, "irqchip/loongarch/intc:starting", eiointc_router_init, NULL); |