diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-10-20 15:35:24 +0800 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-11-26 13:09:25 +0000 |
| commit | 1be356c9326d68c9b0161ca004a41f203864d7ee (patch) | |
| tree | 158ba7fcf20fcb316f28742c7a52c01ef215b18e /drivers/irqchip | |
| parent | 70f7b6c008b37a0beb956e25a6c167edfd4b259e (diff) | |
| download | linux-1be356c9326d68c9b0161ca004a41f203864d7ee.tar.bz2 | |
irqchip/loongson-htvec: Add suspend/resume support
Add suspend/resume support for HTVEC 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/20221020073527.541845-2-chenhuacai@loongson.cn
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-loongson-htvec.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-loongson-htvec.c b/drivers/irqchip/irq-loongson-htvec.c index 8b06082616cb..fc8bf1f5d41b 100644 --- a/drivers/irqchip/irq-loongson-htvec.c +++ b/drivers/irqchip/irq-loongson-htvec.c @@ -16,6 +16,7 @@ #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/of_platform.h> +#include <linux/syscore_ops.h> /* Registers */ #define HTVEC_EN_OFF 0x20 @@ -29,6 +30,7 @@ struct htvec { void __iomem *base; struct irq_domain *htvec_domain; raw_spinlock_t htvec_lock; + u32 saved_vec_en[HTVEC_MAX_PARENT_IRQ]; }; static struct htvec *htvec_priv; @@ -156,6 +158,29 @@ static void htvec_reset(struct htvec *priv) } } +static int htvec_suspend(void) +{ + int i; + + for (i = 0; i < htvec_priv->num_parents; i++) + htvec_priv->saved_vec_en[i] = readl(htvec_priv->base + HTVEC_EN_OFF + 4 * i); + + return 0; +} + +static void htvec_resume(void) +{ + int i; + + for (i = 0; i < htvec_priv->num_parents; i++) + writel(htvec_priv->saved_vec_en[i], htvec_priv->base + HTVEC_EN_OFF + 4 * i); +} + +static struct syscore_ops htvec_syscore_ops = { + .suspend = htvec_suspend, + .resume = htvec_resume, +}; + static int htvec_init(phys_addr_t addr, unsigned long size, int num_parents, int parent_irq[], struct fwnode_handle *domain_handle) { @@ -188,6 +213,8 @@ static int htvec_init(phys_addr_t addr, unsigned long size, htvec_priv = priv; + register_syscore_ops(&htvec_syscore_ops); + return 0; iounmap_base: |