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[2620:137:e000::1:20]) by mx.google.com with ESMTP id d4-20020a170902854400b0017dafc02313si20776767plo.92.2022.10.20.00.40.51; Thu, 20 Oct 2022 00:41:05 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229742AbiJTHiG (ORCPT + 99 others); Thu, 20 Oct 2022 03:38:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46748 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229961AbiJTHiF (ORCPT ); Thu, 20 Oct 2022 03:38:05 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 728F2170DF8 for ; Thu, 20 Oct 2022 00:38:04 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 058E1619E1 for ; Thu, 20 Oct 2022 07:38:04 +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> MIME-Version: 1.0 X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747191506803513364?= X-GMAIL-MSGID: =?utf-8?q?1747191506803513364?= 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: