From patchwork Thu Jun 16 05:37:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 12883348 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 8EEF3C3F2D4 for ; Thu, 16 Jun 2022 05:37:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358733AbiFPFhq (ORCPT ); Thu, 16 Jun 2022 01:37:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1358700AbiFPFhl (ORCPT ); Thu, 16 Jun 2022 01:37:41 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B8CA205E3; Wed, 15 Jun 2022 22:37:37 -0700 (PDT) X-UUID: be1527b3f93c4ad897e44f80291c87b6-20220616 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.6,REQID:85a9e3c0-f0cc-4eac-affb-6ba2354a46fd,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACT ION:release,TS:-5 X-CID-META: VersionHash:b14ad71,CLOUDID:c15b6ff6-e099-41ba-a32c-13b8bfe63214,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: be1527b3f93c4ad897e44f80291c87b6-20220616 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1953433498; Thu, 16 Jun 2022 13:37:29 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Thu, 16 Jun 2022 13:37:27 +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; Thu, 16 Jun 2022 13:37:27 +0800 From: Stanley Chu To: , , , , , , CC: , , , , , , , , , , , , Subject: [PATCH v5 11/11] scsi: ufs-mediatek: Disable unused VCCQx power rails Date: Thu, 16 Jun 2022 13:37:25 +0800 Message-ID: <20220616053725.5681-12-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220616053725.5681-1-stanley.chu@mediatek.com> References: <20220616053725.5681-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Some MediaTek UFS platforms support different VCCQx power rails, for example, both 1.2v and 1.8v VCCQx, in a single kernel image. To optimize the system power consumption, provide a way to disable and release the unused power rail during the device probing. Signed-off-by: Stanley Chu --- drivers/ufs/host/ufs-mediatek.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index 34e51c094366..bfe04a4d1dce 100755 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -712,6 +712,29 @@ static int ufs_mtk_vreg_fix_vcc(struct ufs_hba *hba) return err; } +static void ufs_mtk_vreg_fix_vccqx(struct ufs_hba *hba) +{ + struct ufs_vreg_info *info = &hba->vreg_info; + struct ufs_vreg **vreg_on, **vreg_off; + + if (hba->dev_info.wspecversion >= 0x0300) { + vreg_on = &info->vccq; + vreg_off = &info->vccq2; + } else { + vreg_on = &info->vccq2; + vreg_off = &info->vccq; + } + + if (*vreg_on) + (*vreg_on)->always_on = true; + + if (*vreg_off) { + regulator_disable((*vreg_off)->reg); + devm_kfree(hba->dev, (*vreg_off)->name); + devm_kfree(hba->dev, *vreg_off); + } +} + /** * ufs_mtk_init - find other essential mmio bases * @hba: host controller instance @@ -1241,6 +1264,7 @@ static void ufs_mtk_fixup_dev_quirks(struct ufs_hba *hba) } ufs_mtk_vreg_fix_vcc(hba); + ufs_mtk_vreg_fix_vccqx(hba); } static void ufs_mtk_event_notify(struct ufs_hba *hba,