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From: Huacai Chen <chenhuacai@loongson.cn>
To: Thomas Gleixner <tglx@linutronix.de>, Marc Zyngier <maz@kernel.org>
Cc: linux-kernel@vger.kernel.org, Xuefeng Li <lixuefeng@loongson.cn>,
	Huacai Chen <chenhuacai@gmail.com>,
	Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Huacai Chen <chenhuacai@loongson.cn>
Subject: [PATCH V3 06/10] irqchip/loongson-htvec: Add suspend/resume support
Date: Wed, 25 Aug 2021 14:11:48 +0800	[thread overview]
Message-ID: <20210825061152.3396398-7-chenhuacai@loongson.cn> (raw)
In-Reply-To: <20210825061152.3396398-1-chenhuacai@loongson.cn>

Add suspend/resume support for HTVEC irqchip, which is needed for
suspend/hibernation.

Signed-off-by: Huacai Chen <chenhuacai@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 e969e4588600..d4190fa588d2 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
@@ -30,6 +31,7 @@ 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];
 };
 
 struct htvec *htvec_priv;
@@ -157,6 +159,29 @@ 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)
 {
@@ -190,6 +215,8 @@ static int htvec_init(phys_addr_t addr, unsigned long size,
 
 	htvec_priv = priv;
 
+	register_syscore_ops(&htvec_syscore_ops);
+
 	return 0;
 
 iounmap_base:
-- 
2.27.0


  parent reply	other threads:[~2021-08-25  6:14 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-25  6:11 [PATCH V3 00/10] irqchip: Add LoongArch-related irqchip drivers Huacai Chen
2021-08-25  6:11 ` [PATCH V3 01/10] irqchip: Adjust Kconfig for Loongson Huacai Chen
2021-08-25  6:11 ` [PATCH V3 02/10] irqchip/loongson-pch-pic: Add ACPI init support Huacai Chen
2021-08-25  6:11 ` [PATCH V3 03/10] irqchip/loongson-pch-pic: Add suspend/resume support Huacai Chen
2021-08-25  6:11 ` [PATCH V3 04/10] irqchip/loongson-pch-msi: Add ACPI init support Huacai Chen
2021-08-25  6:11 ` [PATCH V3 05/10] irqchip/loongson-htvec: " Huacai Chen
2021-08-25  6:11 ` Huacai Chen [this message]
2021-08-25  6:11 ` [PATCH V3 07/10] irqchip/loongson-liointc: " Huacai Chen
2021-08-25  6:11 ` [PATCH V3 08/10] irqchip: Add LoongArch CPU interrupt controller support Huacai Chen
2021-08-25  8:40   ` Marc Zyngier
2021-08-27  8:12     ` Huacai Chen
2021-08-28 10:07     ` Huacai Chen
2021-08-28 11:07       ` Marc Zyngier
2021-08-29  9:37         ` Huacai Chen
2021-08-29 10:10           ` Marc Zyngier
2021-08-29 10:34             ` Huacai Chen
2021-08-29 11:00               ` Marc Zyngier
2021-08-30  3:19                 ` Huacai Chen
2021-08-25  6:11 ` [PATCH V3 09/10] irqchip: Add Loongson Extended I/O " Huacai Chen
2021-08-25  6:11 ` [PATCH V3 10/10] irqchip: Add Loongson PCH LPC " Huacai Chen

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