From patchwork Fri Mar 7 03:44:25 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guangjie Song X-Patchwork-Id: 871815 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (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 C4A5618F2FB; Fri, 7 Mar 2025 03:45:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741319107; cv=none; b=Wh1z1RDNWKUUz0H8vqZEBXSlDIYByg0g6Zwx2+s6vEBxRjLzm9RBa4Hf3piX2Diaps6N1fJM3AnAHgdTKZAdHePgmj6YClAHOAT/S7G8TsNKUH7WlqBftcep9YFdqfT1GSu6mzYBM9Bl39jIh8wjuNalKLvQ3HcAth2fqa2ccUA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741319107; c=relaxed/simple; bh=GSIKVsB27BJr2GSKMI9XOewsibUhyGRMhS7HmvyfkKU=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Klujcgb0wf0BNzw518KnW4TBqXQdzk09ozLOMbXgdmdqc8VrYPL54TIUiNE9Nl2/kabzJIuB4o67OY5QGUPavClxjY2UaVEjR8fL8Nhkfv0nrksVVuCBoJMlS0JbsX2mLK7XHTTskMnewJ3tiv4DpFPCuEW8gqT4leuUDVSgKNQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=mfKRG/7l; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="mfKRG/7l" X-UUID: 8b04341cfb0611efaae1fd9735fae912-20250307 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=Wt3gxA53luDARpvgD6v3k7F5nCt/QsxIi4oivqGh4oA=; b=mfKRG/7lOHEfVC1HXxJezl1MoVZvBKnDWeGAcxeRkxYepduxi9dfSYKyGDbDsHX4BX702zHn4G4fRUt//BGif87un0+d/n83LiI2owrrsbXOnyfgIT1ebldbmYO105y0gStz67SSgCm9HDT56dHo6Orv06fQpjotktSO/cpic7s=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.2.1, REQID:7534f21d-d66e-4d11-9c08-7b85bbcda614, IP:0, UR L:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION:r elease,TS:0 X-CID-META: VersionHash:0ef645f, CLOUDID:ac8d21ce-23b9-4c94-add0-e827a7999e28, B ulkID:nil,BulkQuantity:0,Recheck:0,SF:81|82|102,TC:nil,Content:0|50,EDM:-3 ,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV :0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 8b04341cfb0611efaae1fd9735fae912-20250307 Received: from mtkmbs14n1.mediatek.inc [(172.21.101.75)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 880658337; Fri, 07 Mar 2025 11:44:59 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by MTKMBS14N1.mediatek.inc (172.21.101.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.28; Fri, 7 Mar 2025 11:44:57 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1258.28 via Frontend Transport; Fri, 7 Mar 2025 11:44:57 +0800 From: Guangjie Song To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , Ulf Hansson CC: , , , , , Guangjie Song , Subject: [PATCH 01/13] pmdomain: mediatek: Support sram isolation Date: Fri, 7 Mar 2025 11:44:25 +0800 Message-ID: <20250307034454.12243-2-guangjie.song@mediatek.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20250307034454.12243-1-guangjie.song@mediatek.com> References: <20250307034454.12243-1-guangjie.song@mediatek.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Support sram isolation to isolate signals and prevent current leakage. Signed-off-by: Guangjie Song --- drivers/pmdomain/mediatek/mtk-scpsys.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/pmdomain/mediatek/mtk-scpsys.c b/drivers/pmdomain/mediatek/mtk-scpsys.c index 1a80c1537a43..d53bd07a6804 100644 --- a/drivers/pmdomain/mediatek/mtk-scpsys.c +++ b/drivers/pmdomain/mediatek/mtk-scpsys.c @@ -25,6 +25,7 @@ #define MTK_SCPD_ACTIVE_WAKEUP BIT(0) #define MTK_SCPD_FWAIT_SRAM BIT(1) +#define MTK_SCPD_SRAM_ISO BIT(2) #define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x)) #define SPM_VDE_PWR_CON 0x0210 @@ -56,6 +57,8 @@ #define PWR_ON_BIT BIT(2) #define PWR_ON_2ND_BIT BIT(3) #define PWR_CLK_DIS_BIT BIT(4) +#define PWR_SRAM_CLKISO_BIT BIT(5) +#define PWR_SRAM_ISOINT_B_BIT BIT(6) #define PWR_STATUS_CONN BIT(1) #define PWR_STATUS_DISP BIT(3) @@ -257,6 +260,14 @@ static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr) return ret; } + if (MTK_SCPD_CAPS(scpd, MTK_SCPD_SRAM_ISO)) { + val = readl(ctl_addr) | PWR_SRAM_ISOINT_B_BIT; + writel(val, ctl_addr); + udelay(1); + val &= ~PWR_SRAM_CLKISO_BIT; + writel(val, ctl_addr); + } + return 0; } @@ -266,6 +277,14 @@ static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr) u32 pdn_ack = scpd->data->sram_pdn_ack_bits; int tmp; + if (MTK_SCPD_CAPS(scpd, MTK_SCPD_SRAM_ISO)) { + val = readl(ctl_addr) | PWR_SRAM_CLKISO_BIT; + writel(val, ctl_addr); + val &= ~PWR_SRAM_ISOINT_B_BIT; + writel(val, ctl_addr); + udelay(1); + } + val = readl(ctl_addr); val |= scpd->data->sram_pdn_bits; writel(val, ctl_addr);