From patchwork Wed Jun 15 03:51:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 12881797 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E283DCCA47D for ; Wed, 15 Jun 2022 03:52:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352156AbiFODwR (ORCPT ); Tue, 14 Jun 2022 23:52:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244518AbiFODv4 (ORCPT ); Tue, 14 Jun 2022 23:51:56 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FA1E5005E; Tue, 14 Jun 2022 20:51:55 -0700 (PDT) X-UUID: 6da093a912f34a91b69678f47be0baf4-20220615 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.6,REQID:b5310148-119a-4f24-84b7-7ec94e8d2fe6,OB:0,LO B:0,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:5 X-CID-META: VersionHash:b14ad71,CLOUDID:503b42f6-e099-41ba-a32c-13b8bfe63214,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: 6da093a912f34a91b69678f47be0baf4-20220615 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1469923884; Wed, 15 Jun 2022 11:51:49 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Wed, 15 Jun 2022 11:51:48 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 15 Jun 2022 11:51:47 +0800 From: Stanley Chu To: , , , , , , CC: , , , , , , , , , , , , Subject: [PATCH v4 06/10] scsi: ufs-mediatek: Support low-power mode for VCCQ Date: Wed, 15 Jun 2022 11:51:42 +0800 Message-ID: <20220615035146.20964-7-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220615035146.20964-1-stanley.chu@mediatek.com> References: <20220615035146.20964-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Peter Wang Also allow VCCQ to enter low-power mode, and meanwhile remove the restriction of VCC because VCCQ/VCCQ2 can be changed to low-power mode even if VCC keeps on while the device is not in active power mode. Reviewed-by: Stanley Chu Signed-off-by: Peter Wang Signed-off-by: Stanley Chu --- drivers/ufs/host/ufs-mediatek.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index 03762ecaaaf8..65a2a4185ef6 100755 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -1031,7 +1031,13 @@ static int ufs_mtk_link_set_lpm(struct ufs_hba *hba) static void ufs_mtk_vreg_set_lpm(struct ufs_hba *hba, bool lpm) { - if (!hba->vreg_info.vccq2 || !hba->vreg_info.vcc) + struct ufs_vreg *vccqx = NULL; + + if (!hba->vreg_info.vccq && !hba->vreg_info.vccq2) + return; + + /* Skip if VCC is assumed always-on */ + if (!hba->vreg_info.vcc) return; /* Bypass LPM when device is still active */ @@ -1042,12 +1048,13 @@ static void ufs_mtk_vreg_set_lpm(struct ufs_hba *hba, bool lpm) if (lpm && hba->vreg_info.vcc->enabled) return; - if (lpm) - regulator_set_mode(hba->vreg_info.vccq2->reg, - REGULATOR_MODE_IDLE); + if (hba->vreg_info.vccq) + vccqx = hba->vreg_info.vccq; else - regulator_set_mode(hba->vreg_info.vccq2->reg, - REGULATOR_MODE_NORMAL); + vccqx = hba->vreg_info.vccq2; + + regulator_set_mode(vccqx->reg, + lpm ? REGULATOR_MODE_IDLE : REGULATOR_MODE_NORMAL); } static void ufs_mtk_auto_hibern8_disable(struct ufs_hba *hba)