From patchwork Fri Nov 24 07:08:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?QXhlIFlhbmcgKOadqOejiik=?= X-Patchwork-Id: 13467044 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 7ED83C61DF4 for ; Fri, 24 Nov 2023 07:10:25 +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=ucv5SkaPMyQeyclM1BmQvoovqtCfyR4/Dim+QgBHR1o=; b=E3z02j5NXbjt2s1HVq0LMl/D0d 3mFpk54sIIpFJQcCMh48AOMtMxjtdoumkMNalQx5a41Bcsl7ybpe2KqKbIJIWanwuMneY5yfC7UqX JpRDhIvm0yH3ssd1IQOQzSoWui30OrAbDRlPdZc+prrq1UEEFg8xdktjpuN/q/Hk9onyLIhfdI4oz fNcTRxPYffhMziYLkC8tvNxuCZRvvsspWceF8MP+apL+WwaCIN2nWZc+J0E60oj71aV9JASn34JHF YzIIzXymFu2CM5/8du95sqg+s2Ma2Ktxdn/+ZgpGVPKbHv+zjSyZDcKeJg/mAvtNSM97KAhTnK+C3 5PFJs62w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r6QKU-006LWv-2p; Fri, 24 Nov 2023 07:10:22 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r6QKR-006LWS-2p; Fri, 24 Nov 2023 07:10:21 +0000 X-UUID: 82ad43d88a9811ee9b7791016c24628a-20231124 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=ucv5SkaPMyQeyclM1BmQvoovqtCfyR4/Dim+QgBHR1o=; b=VxqIVKdEubNRAiNV6Wh2gZcuNNU45Kx+CqV7exlVNKARHV8q6Pd1eED17au59VCuIg25SemqGcqi0fgFBVstFAt7D/rYLzHMYDpp6W5QZn3ZpYObVHGJYTZenzzMJ1nFZjh2DZSSWQcSJ1wZxVXYZ/4g/H/qa9YVXlu+73Pu0DY=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.33,REQID:7dc8284b-0aab-41a1-aa03-0fdd5f1122de,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:364b77b,CLOUDID:d6d50573-1bd3-4f48-b671-ada88705968c,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File: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 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 82ad43d88a9811ee9b7791016c24628a-20231124 Received: from mtkmbs14n1.mediatek.inc [(172.21.101.75)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 73073833; Fri, 24 Nov 2023 00:10:12 -0700 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 24 Nov 2023 15:08:46 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Fri, 24 Nov 2023 15:08:45 +0800 From: Axe Yang To: Chaotian Jing , Ulf Hansson , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , "Wenbin Mei" CC: , , , , , , Axe Yang Subject: [PATCH v1 2/2] dt-bindings: mmc: mtk-sd: add 64-steps tuning related property Date: Fri, 24 Nov 2023 15:08:39 +0800 Message-ID: <20231124070839.12484-3-axe.yang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231124070839.12484-1-axe.yang@mediatek.com> References: <20231124070839.12484-1-axe.yang@mediatek.com> MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--6.449000-8.000000 X-TMASE-MatchedRID: iSQL5szRvdEWnPlK0Y8cfo4V8tCoXo/ShV0srjoqtx/1yFIyxT4nyxJ4 B8fZD6Dx7p17JCLIX7cfSuixqQMLLLvhKf49TtYAbBu6+EIezdyZf5btvM85AQ6QlBHhBZuw9BQ FWu9qPYararPPtIvi4m9yZj3aufb5HxPMjOKY7A8LbigRnpKlKTpcQTtiHDgWBpMM+r6atzvo8X R0jECZh16xAW23XWT/308PTuSCsS/VQpeWxO19jEMMprcbiest X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--6.449000-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 4C2FCFED837D2B2B439CA89CB93E6C99526F618A8D15075F1ED0FF75C59294CD2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231123_231019_924285_5F1FAA8D X-CRM114-Status: UNSURE ( 8.80 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add 'mediatek,tune-64-steps' option. This property will give MSDC a chance to achieve a more optimal calibration result, thus avoiding potential CRC issues. Signed-off-by: Axe Yang --- Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml index 3fffa467e4e1..c33301e2ea33 100644 --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml @@ -145,6 +145,14 @@ properties: minimum: 0 maximum: 7 + mediatek,tune-64-steps: + $ref: /schemas/types.yaml#/definitions/flag + description: + Some Soc need enable 64-steps tuning for better delay value to avoid CRC issue. + If present, tune 64 steps to cover a complete clock cycle. + If not present, tune only 32 steps. For eMMC and SD, this can also yield + satisfactory calibration results in most cases. + resets: maxItems: 1