From patchwork Mon Dec 19 02:40:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiangsheng Hou X-Patchwork-Id: 13076198 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B966C4167B for ; Mon, 19 Dec 2022 02:41:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231130AbiLSClG (ORCPT ); Sun, 18 Dec 2022 21:41:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231256AbiLSClE (ORCPT ); Sun, 18 Dec 2022 21:41:04 -0500 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 267ED63A4; Sun, 18 Dec 2022 18:40:58 -0800 (PST) X-UUID: d48c9bf857684ccaa246d29f7c3a3269-20221219 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=v0RLYJNNjOaZwIF3K4Tu0NmZq0XJJx6TB5aHEi73l4Y=; b=WJoUUjcRY1IJTZnKlOjK6BZX1rK+mDsqhHZIC2OedgUntGsxC41bfPbFIYExk3Br5XDr+rx8y/ojho+aSvGD4ihqxo5eP31HmEckAvPe7M6rySArjF+Y991Mi9r0k5ccSER2m4n3wvP3iQVJ2wgoOuyuX8L4sRccS5f981/Pm7s=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.14,REQID:3014786d-699b-45ad-b1ba-cde9b6d9c9e4,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:dcaaed0,CLOUDID:aed81952-dd49-462e-a4be-2143a3ddc739,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 X-UUID: d48c9bf857684ccaa246d29f7c3a3269-20221219 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1763200135; Mon, 19 Dec 2022 10:40:52 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) 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 15.2.792.15; Mon, 19 Dec 2022 10:40:51 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Mon, 19 Dec 2022 10:40:50 +0800 From: Xiangsheng Hou To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Matthias Brugger , Mark Brown , Chuanhong Guo CC: Xiangsheng Hou , , , , , , , , , "AngeloGioacchino Del Regno" Subject: [PATCH v5 05/10] spi: mtk-snfi: Add snfi sample delay and read latency adjustment Date: Mon, 19 Dec 2022 10:40:14 +0800 Message-ID: <20221219024019.31974-6-xiangsheng.hou@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221219024019.31974-1-xiangsheng.hou@mediatek.com> References: <20221219024019.31974-1-xiangsheng.hou@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Add snfi sample delay and read latency adjustment which can get from dts property. Signed-off-by: Xiangsheng Hou Reviewed-by: AngeloGioacchino Del Regno --- drivers/spi/spi-mtk-snfi.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/spi/spi-mtk-snfi.c b/drivers/spi/spi-mtk-snfi.c index 85644308df23..f3f95eb37365 100644 --- a/drivers/spi/spi-mtk-snfi.c +++ b/drivers/spi/spi-mtk-snfi.c @@ -195,6 +195,8 @@ #define DATA_READ_MODE_X4 2 #define DATA_READ_MODE_DUAL 5 #define DATA_READ_MODE_QUAD 6 +#define DATA_READ_LATCH_LAT GENMASK(9, 8) +#define DATA_READ_LATCH_LAT_S 8 #define PG_LOAD_CUSTOM_EN BIT(7) #define DATARD_CUSTOM_EN BIT(6) #define CS_DESELECT_CYC_S 0 @@ -205,6 +207,9 @@ #define SNF_DLY_CTL3 0x548 #define SFCK_SAM_DLY_S 0 +#define SFCK_SAM_DLY GENMASK(5, 0) +#define SFCK_SAM_DLY_TOTAL 9 +#define SFCK_SAM_DLY_RANGE 47 #define SNF_STA_CTL1 0x550 #define CUS_PG_DONE BIT(28) @@ -1368,6 +1373,8 @@ static int mtk_snand_probe(struct platform_device *pdev) const struct of_device_id *dev_id; struct spi_controller *ctlr; struct mtk_snand *ms; + unsigned long spi_freq; + u32 val = 0; int ret; dev_id = of_match_node(mtk_snand_ids, np); @@ -1446,6 +1453,19 @@ static int mtk_snand_probe(struct platform_device *pdev) // switch to SNFI mode nfi_write32(ms, SNF_CFG, SPI_MODE); + ret = of_property_read_u32(np, "rx-sample-delay-ns", &val); + if (!ret) + nfi_rmw32(ms, SNF_DLY_CTL3, SFCK_SAM_DLY, + val * SFCK_SAM_DLY_RANGE / SFCK_SAM_DLY_TOTAL); + + ret = of_property_read_u32(np, "mediatek,rx-latch-latency-ns", &val); + if (!ret) { + spi_freq = clk_get_rate(ms->pad_clk); + val = DIV_ROUND_CLOSEST(val, NSEC_PER_SEC / spi_freq); + nfi_rmw32(ms, SNF_MISC_CTL, DATA_READ_LATCH_LAT, + val << DATA_READ_LATCH_LAT_S); + } + // setup an initial page format for ops matching page_cache_op template // before ECC is called. ret = mtk_snand_setup_pagefmt(ms, SZ_2K, SZ_64);