From patchwork Thu Dec 7 06:35:34 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: 13482729 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 8B9FCC4167B for ; Thu, 7 Dec 2023 06:56:29 +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=RCJcyyZ8EMNjvJVmY4Ygro4ZBJTkkM+cPjU66561fik=; b=OYxEvspz3Z7cQIGJW4DX1z5ywU wawTTnbt7eqmV34nv36UBmWYHcyn93I9iMaxlQfx6h/9LC8r7LIPNCUzYpKE//mbx2X1EUB7Mwq/o a8vvxZB6ZeUpz2Q37mFU2f92KAByayMg9+ipZHRtn8CyP47x9WLllCeOF1RAxP51hKYiAsjs+NhPU KKUEF9bLszTdJmnM0P24SZw/Az0/0sq9J6I96AAxXkXNw186rR8wgAvfXHjp0KxaeSP7esXo+9LzX eLvrLFRhZGZpsOPJrhB/gKOx/Jcb0m+qlLTM1VlYZL9pYROTtbAf0aC+beW+qFLJhVg8vOlgiFTTK vqsCCx3Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rB8JA-00C2J3-0x; Thu, 07 Dec 2023 06:56:28 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rB8J7-00C2Id-0o; Thu, 07 Dec 2023 06:56:26 +0000 X-UUID: b90d14dc94cd11ee9b09ad09c76753c8-20231206 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=RCJcyyZ8EMNjvJVmY4Ygro4ZBJTkkM+cPjU66561fik=; b=UTxcd1kGvh7vpHDIFyBSoCNlyxzPxfKVeJABcH6/JMM/jSqvAACF6uWEv+CPcCB5ELDqzcXrHuZ4DBtBL73H3eRBEiANJzHcjetxCgSQ71SXEgAXSD7PevKgJPz9vyiBjUkKV35yPUHvxfWAcyrjOmYc9x5rwoKJhYjQboSTPx0=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:1b0fc96a-ecfa-4f7c-8f6f-3a1187e134b7,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:5d391d7,CLOUDID:fae8ea60-c89d-4129-91cb-8ebfae4653fc,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: b90d14dc94cd11ee9b09ad09c76753c8-20231206 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 531175737; Wed, 06 Dec 2023 23:56:18 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Thu, 7 Dec 2023 14:35:40 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 7 Dec 2023 14:35:39 +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 , Krzysztof Kozlowski Subject: [PATCH v4 1/2] dt-bindings: mmc: mtk-sd: add tuning steps related property Date: Thu, 7 Dec 2023 14:35:34 +0800 Message-ID: <20231207063535.29546-2-axe.yang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231207063535.29546-1-axe.yang@mediatek.com> References: <20231207063535.29546-1-axe.yang@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231206_225625_301417_05737393 X-CRM114-Status: UNSURE ( 9.08 ) 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,tuning-steps' setting. This property will give MSDC a chance to extend tuning steps up to 64. With more tuning steps, MSDC may achieve a more optimal calibration result, thus avoiding potential CRC issues. Reviewed-by: Krzysztof Kozlowski Signed-off-by: Axe Yang Reviewed-by: AngeloGioacchino Del Regno --- Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml index 3fffa467e4e1..c532ec92d2d9 100644 --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml @@ -145,6 +145,15 @@ properties: minimum: 0 maximum: 7 + mediatek,tuning-step: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Some SoCs need extend tuning step for better delay value to avoid CRC issue. + If not present, default tuning step is 32. For eMMC and SD, this can yield + satisfactory calibration results in most cases. + enum: [32, 64] + default: 32 + resets: maxItems: 1