From patchwork Fri Dec 6 16:00:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean Pihet X-Patchwork-Id: 11276715 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 26AFC17EF for ; Fri, 6 Dec 2019 16:00:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 04CC92173E for ; Fri, 6 Dec 2019 16:00:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=newoldbits-com.20150623.gappssmtp.com header.i=@newoldbits-com.20150623.gappssmtp.com header.b="k+OCABUO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726350AbfLFQAY (ORCPT ); Fri, 6 Dec 2019 11:00:24 -0500 Received: from mail-wm1-f67.google.com ([209.85.128.67]:56124 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726271AbfLFQAY (ORCPT ); Fri, 6 Dec 2019 11:00:24 -0500 Received: by mail-wm1-f67.google.com with SMTP id q9so8338594wmj.5 for ; Fri, 06 Dec 2019 08:00:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=newoldbits-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=MIA0NWCCK4h1Z/JZPXdHERLAqtudgTBcQ16Z5dk400I=; b=k+OCABUOgXU2D0H91QEc8C4MBpcCEGP4BtU3hy4jh+nQXUZhONkKwJvVhLEylHMIWe 4hL9OkcFNYRFW5O13eLzUsQ+6LCpgBnPusEFHz5FPKRgK5vtYn4a2QVARTJka2mLHekc gu8I/LQDV9pRztsvXDcvIOHndW3RnPo1o1QfT8pZ/NDzuGXG+2t6UzOqsOrhhjWATi2Q 5p0WMHuaZ0lnfR7tzkQqDgg6hiBx4xkXLZp0EWYz0cPk5wtpVQpv6Ecl9/ww7GGvUvch KXILmz55BX2btblZTaJL/HjFXZhciOuIo4+hbK0TFncZakBphZdJ7GK4nwQ+Uni7+YEM CIdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=MIA0NWCCK4h1Z/JZPXdHERLAqtudgTBcQ16Z5dk400I=; b=NuYBt3DncDJC96+c5EhfS4ar5ZE0welGk2cokPHZo9rHUKjYIHFFQwp1XlP6zDVKU1 d3Ty4tBbm0TOCcPi3OxIT9lCub0Hm8td3yCp1u0kmx2svOtJeByBj3jUsvx7SwlA9COQ 90Pc5o853TmHb5b0gZQym9MeGtVtU3AZPdeK9UvqDBD1OceySymZpfQQFMEi4J3PKY+y dn5u1u0KnqDxu8LlhLdBIL1WsC8s6j3NPAc8WA5YTKAVZc3ga5X3Flx2wbbjjtgbr2PH JhzmdwITZEYg8JQvcQDsBgbPpI7fnNqfjRdq0L8FJremg0bTWubsLlk4p9EdnqMcgYPo eLxg== X-Gm-Message-State: APjAAAWdmkaCt/SX+XcYDGQ3eulTD68kyhA4X3oUsADHA2CKauTbn5ID bEwr1aat36tWBrvuueZZ8zI2hg== X-Google-Smtp-Source: APXvYqw74RI7bZwglD8R2ii0dsT+fkEoVrUANmipbT37cvligxfRIUroUVQN1eZpKoeIMBQyb6Rcdw== X-Received: by 2002:a1c:f316:: with SMTP id q22mr11570892wmq.103.1575648022396; Fri, 06 Dec 2019 08:00:22 -0800 (PST) Received: from msilabo.lan (241.33-200-80.adsl-dyn.isp.belgacom.be. [80.200.33.241]) by smtp.gmail.com with ESMTPSA id d19sm3891496wmd.38.2019.12.06.08.00.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2019 08:00:21 -0800 (PST) From: Jean Pihet To: Mark Brown , Tero Kristo Cc: linux-omap@vger.kernel.org, linux-spi@vger.kernel.org, Ryan Barnett , Conrad Ratschan , Jean Pihet Subject: [PATCH 0/3] TI QSPI: Add support for large flash devices Date: Fri, 6 Dec 2019 17:00:04 +0100 Message-Id: <20191206160007.331801-1-jean.pihet@newoldbits.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Large devices are bigger than >64MB in size. - Fix the SPI clock generation in order to produce the desired frequency. - Since the TI QSPI IP block only maps 64MB of MMIO, use MMIO below the 64MB boundary and software generated transfers above. - Optimize the software generated transfers for dual and quad I/O read operations. The speed-up is 3.5x for quad I/O reads. Tested using raw accesses (mtd_debug) and JFFS2 FS read/write/erase; in single, dual and quad modes. All accesses have been checked on the logic analyzer. Jean Pihet (3): TI QSPI: Fix fclk frequency TI QSPI: support large flash devices TI QSPI: optimize transfers for dual and quad read drivers/spi/spi-ti-qspi.c | 83 +++++++++++++++++++++++++++++---------- 1 file changed, 63 insertions(+), 20 deletions(-)