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[2620:137:e000::1:20]) by mx.google.com with ESMTP id cb2-20020a170906a44200b0094596ff820dsi1534471ejb.1025.2023.04.11.02.56.48; Tue, 11 Apr 2023 02:57:12 -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 S229875AbjDKJuv (ORCPT + 99 others); Tue, 11 Apr 2023 05:50:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230093AbjDKJub (ORCPT ); Tue, 11 Apr 2023 05:50:31 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00CBC10E5; Tue, 11 Apr 2023 02:50:30 -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 8D0B462377; Tue, 11 Apr 2023 09:50:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C48AC433D2; Tue, 11 Apr 2023 09:50:26 +0000 (UTC) From: Huacai Chen To: Arnd Bergmann , Huacai Chen Cc: loongarch@lists.linux.dev, linux-arch@vger.kernel.org, Xuefeng Li , Guo Ren , Xuerui Wang , Jiaxun Yang , linux-kernel@vger.kernel.org, loongson-kernel@lists.loongnix.cn, Huacai Chen , Baoqi Zhang Subject: [PATCH] LoongArch: Enable PG when wakeup from suspend Date: Tue, 11 Apr 2023 17:49:59 +0800 Message-Id: <20230411094959.3368451-1-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.39.1 MIME-Version: 1.0 X-Spam-Status: No, score=-4.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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?1762873345252641168?= X-GMAIL-MSGID: =?utf-8?q?1762873345252641168?= Some firmwares don't enable PG when wakeup from suspend, so do it in kernel. This can improve code compatibility for boot kernel. Signed-off-by: Baoqi Zhang Signed-off-by: Huacai Chen --- arch/loongarch/power/suspend_asm.S | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/loongarch/power/suspend_asm.S b/arch/loongarch/power/suspend_asm.S index 90da899c06a1..e2fc3b4e31f0 100644 --- a/arch/loongarch/power/suspend_asm.S +++ b/arch/loongarch/power/suspend_asm.S @@ -80,6 +80,10 @@ SYM_INNER_LABEL(loongarch_wakeup_start, SYM_L_GLOBAL) JUMP_VIRT_ADDR t0, t1 + /* Enable PG */ + li.w t0, 0xb0 # PLV=0, IE=0, PG=1 + csrwr t0, LOONGARCH_CSR_CRMD + la.pcrel t0, acpi_saved_sp ld.d sp, t0, 0 SETUP_WAKEUP