Messages in this thread Patch in this message | | | From | Jianmin Lv <> | Subject | [PATCH RFC V2 07/10] irqchip/loongson-htvec: Add suspend/resume support | Date | Fri, 27 May 2022 19:02:39 +0800 |
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Add suspend/resume support for HTVEC irqchip, which is needed for suspend/hibernation.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn> --- drivers/irqchip/irq-loongson-htvec.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)
diff --git a/drivers/irqchip/irq-loongson-htvec.c b/drivers/irqchip/irq-loongson-htvec.c index 354630b..a3c60e3 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> #include "irq-loongarch-pic-common.h" /* Registers */ @@ -31,6 +32,7 @@ struct htvec { struct irq_domain *htvec_domain; raw_spinlock_t htvec_lock; struct fwnode_handle *domain_handle; + u32 saved_vec_en[HTVEC_MAX_PARENT_IRQ]; }; static struct htvec *htvec_priv; @@ -158,6 +160,29 @@ 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) { @@ -193,6 +218,8 @@ static int htvec_init(phys_addr_t addr, unsigned long size, register_syscore_ops(&htvec_syscore_ops); + register_syscore_ops(&htvec_syscore_ops); + return 0; iounmap_base: -- 1.8.3.1
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