From patchwork Tue Nov 28 07:01:26 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: 13470548 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 7F661C4167B for ; Tue, 28 Nov 2023 07:02:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id: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=Ev1FADuC58yb0OsT0DXq7hjJkBIhMaH3Tf8bY9XaPGI=; b=S+K3U+3/u6s9RD QfZ7O3tAp3F2e8TK5O7iFoQahbfXi00Cg5lDfIxg5/F4fDmIts/LRLKfhbxORyJgCwVgSaBi0LvdJ qLo5afFZtpcFDvb8RetFWsW0TcjpWrIf19V37+SFptD2lB19ZrPaSskigHalLIghKztfXgs0mUP2+ TFTfhmGmzXHrX3Vo2bdtcHucdlEP2l73FIb3kNax6GIAn3opJOLG2mv9z4+O/UMEJI7hCOKKAbVF1 szf3cnDuQ0e4xc7LZidfQ3HhKmZ9YXVJv7QzqMD+LO8m9TgcVw1xNjHWguXZzFOBkJsVO6GlrJe7i YH5uc8+Mw8eokwGoqm0Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r7s6b-004JY5-1O; Tue, 28 Nov 2023 07:02:01 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r7s6W-004JTb-0z; Tue, 28 Nov 2023 07:01:57 +0000 X-UUID: ffd46c088dbb11ee86758d4a7c00f3a0-20231128 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=1kILKxh9E79r7aDOclLB0+1y/1FG780xXk0u2JGX8Ho=; b=aOBae1mV0+QXRvn1HS+GiRv1oRfapxE2fs9q/FNHCXGt2B+4aXW2xPB77N1tKNBq9BJsQUaiJg/qoSs+XR1XPy2eMGhgezLCy11gt6VU1cI9kU5iiy8OVgxf+QxN/vvLEpanyV8CKr800IGxpCGes8yKsrgL5mj7ND0c3INXw5o=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.34,REQID:83130685-ac39-46b0-ada8-f45c8d98cfa3,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:abefa75,CLOUDID:298508fd-4a48-46e2-b946-12f04f20af8c,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: ffd46c088dbb11ee86758d4a7c00f3a0-20231128 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 2042954212; Tue, 28 Nov 2023 00:01:48 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Tue, 28 Nov 2023 15:01:41 +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; Tue, 28 Nov 2023 15:01:40 +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 v2 1/2] dt-bindings: mmc: mtk-sd: add tuning steps related property Date: Tue, 28 Nov 2023 15:01:26 +0800 Message-ID: <20231128070127.27442-2-axe.yang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231128070127.27442-1-axe.yang@mediatek.com> References: <20231128070127.27442-1-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-20231127_230156_344769_8664DBF8 X-CRM114-Status: UNSURE ( 9.89 ) 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 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. Signed-off-by: Axe Yang Reviewed-by: Krzysztof Kozlowski --- 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