From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B3D7123BF for ; Thu, 20 Oct 2022 07:38:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E3A9C433C1; Thu, 20 Oct 2022 07:38:01 +0000 (UTC) From: Huacai Chen To: Thomas Gleixner , Marc Zyngier Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, Xuefeng Li , Huacai Chen , Jiaxun Yang , Huacai Chen Subject: [PATCH V2 1/4] irqchip/loongson-htvec: Add suspend/resume support Date: Thu, 20 Oct 2022 15:35:24 +0800 Message-Id: <20221020073527.541845-2-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221020073527.541845-1-chenhuacai@loongson.cn> References: <20221020073527.541845-1-chenhuacai@loongson.cn> Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add suspend/resume support for HTVEC irqchip, which is needed for upcoming suspend/hibernation. Signed-off-by: Huacai Chen --- 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 1f72bde2fff5..11289ffa07e4 100644 --- a/drivers/irqchip/irq-loongson-htvec.c +++ b/drivers/irqchip/irq-loongson-htvec.c @@ -16,6 +16,7 @@ #include #include #include +#include /* 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: -- 2.31.1