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: 14005901 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B30C6C19F32 for ; Fri, 7 Mar 2025 04:23:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Wt3gxA53luDARpvgD6v3k7F5nCt/QsxIi4oivqGh4oA=; b=1SydiSTYmdVCcUSm5Jyc/3hgQc XDZfvAjx/nGuDr7a2UOJLDZQ1BgB3t9I7r21faoPIS76z8wSWf0MpMQejoP/ZbC/d9GeTNUrZIH7H 6mmijGSHx4oP7ANhJXGvGgii3UlGvXkdLdPxYFbDp0iRULcdvNdCrIT39Bcuz1SVkKDbZAZ7BBaeC Mw/h2ZzArLY7UgnrZAVG/NFpw/xktxAQL75r/tVqh0t1PNkPrTb0NBIVnAe2oqQtec4aQi9YEEARi C9B4hUcrH2r0dmxCKjw+AQMAviz8JPsW+CqXSB9Z1pez7vjSS0hvkdr29UAeKfqrdq1AEoOLN4zNA Yty6l2iQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tqPFR-0000000D6rN-3zoR; Fri, 07 Mar 2025 04:23:45 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tqOe2-0000000D23M-2od0; Fri, 07 Mar 2025 03:45:07 +0000 X-UUID: 8bee66aefb0611ef83f2a1c9db70dae0-20250306 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:8c029d3f-4c2e-4f2e-a272-5cd382ece467,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:3197108c-f5b8-47d5-8cf3-b68fe7530c9a,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: 8bee66aefb0611ef83f2a1c9db70dae0-20250306 Received: from mtkmbs09n1.mediatek.inc [(172.21.101.35)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 877278586; Thu, 06 Mar 2025 20:45:00 -0700 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> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250306_194506_711828_E1E5002A X-CRM114-Status: UNSURE ( 9.47 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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);