From mboxrd@z Thu Jan 1 00:00:00 1970 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 D6A6FC4167B for ; Fri, 3 Nov 2023 14:17:27 +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-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-ID:References:In-Reply-To:Subject:Cc:To:From :Date:MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=gNYW9UutvK6nL7ZB0jOZnQHOzf0vTE+5SUlOhc+8bjA=; b=sArOhwmyBvEYYAQRJ8CaOI8eMg HC5/1VKLkvdUlU7gtH33wr5XR01vIolJUz9dX5O60tidKQLTXDvBY51uA7Cv1gWk6KCLJDbIDF27i eDw+CSWlznttdCthII+TL6czCOPTmCvanhvzycyzXtuxvBS1EbqLO2yJfnGHzd9bexAFs/Zy6bw/M rF1sbIZbaj1j1T//piS99nONvPCsN/6WbrJry6RW+9bI4botMwpKKDN/Sy91VHAR7SBClFQ/aAcvn 75ZPnxGc4TFn50qUpf49EmFtsk5tHgkgHygyQQQOrC3FyIRQPIjPFNIP6LpO68EbT7tmmlv98X11q AtNW3iFg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qyuyi-00BYke-2c; Fri, 03 Nov 2023 14:16:52 +0000 Received: from phobos.denx.de ([2a01:238:438b:c500:173d:9f52:ddab:ee01]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qyuyd-00BYhe-0a; Fri, 03 Nov 2023 14:16:51 +0000 Received: from mail.denx.de (unknown [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: festevam@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id C956A8715F; Fri, 3 Nov 2023 15:16:44 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1699021004; bh=1Ui78Z0QryBc5/nyUGeQqQ16vGuEzXyaOA+NprPq3yo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=fTbghmUCj9EAVG9/qDIRrMHN8AgplJn9b0273XpCSR5zXuhrN1/3tKHddzMFT3O+5 W6fY1EiMDbGFRJrLw3FCpa9oLKc+fPDs6TIGn7T9sAQlFesHpScfg1OyXSYTRb5woK 31LGY8ipOjcqlS9PKTKQpWlpJ9KC+oclk29Z+69X53hPsD4q3XMkQZmJ/qXV7l/91f DMCwzp01h6aCtVJDSnfbnylxtWlero+ZNqqWk81+pWje975potdnHujj/kVYTg2rzk ieTfXhZAVdZ/wQ4PpfTL2r3Vhhdq/Qt/lP5NzZn0OAcpPZKHnKbG2w003vMmAVm8Sa dBMKtVHCMz74A== MIME-Version: 1.0 Date: Fri, 03 Nov 2023 11:16:44 -0300 From: Fabio Estevam To: Tudor Ambarus Cc: Takahiro Kuwano , michael@walle.cc, pratyush@kernel.org, linux-mtd@lists.infradead.org, linux-arm-kernel@lists.infradead.org, bacem.daassi@infineon.com, miquel.raynal@bootlin.com, richard@nod.at Subject: Re: [PATCH v2 2/6] mtd: spi-nor: add erase die (chip) capability In-Reply-To: References: <20231101145853.524045-1-tudor.ambarus@linaro.org> <216d99d671caa2465519fcc3360c5001@denx.de> <5c48f93a9dd9b2bdc1874dd4eebbf5bb@denx.de> <632457ed6b022856496537bdf8a738ba@denx.de> <6f1aa670-b3f7-4ea3-bc80-773a57e46c36@linaro.org> <968ba4c249926e986b02440ad0421e98@denx.de> <25ca1a4c-683c-4b6d-938b-07323b211815@linaro.org> <5872f7233bc0dc4669aa1324f3ae3cf0@denx.de> <95c16eb0-a785-4a8d-bb42-c5a09b034d0a@linaro.org> <085ba0f9780b1f8b34bc9e1037fec5e7@denx.de> <9004acceea77d2f06aaff0ca5f916cd7@denx.de> Message-ID: X-Sender: festevam@denx.de User-Agent: Roundcube Webmail/1.3.6 X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231103_071647_605056_0F349287 X-CRM114-Status: UNSURE ( 7.11 ) 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: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 03/11/2023 10:48, Tudor Ambarus wrote: > Yep, it's strange, we'll have to check what's happening. I found my > n25q00 flash, on my side all its 4 dice are erased in 5 sec. SFDP > defines how long the erase die should take, see BFPT dword 11. You can > start with that. Where does BFPT dword 11 reside inside SFDP? ~# hexdump -C /sys/devices/platform/soc@0/30800000.bus/30bb0000.spi/spi_master/spi0/spi0.0/spi-nor/sfdp 00000000 53 46 44 50 06 01 01 ff 00 06 01 10 30 00 00 ff |SFDP........0...| 00000010 84 00 01 02 80 00 00 ff ff ff ff ff ff ff ff ff |................| 00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................| 00000030 e5 20 fb ff ff ff ff 3f 29 eb 27 6b 27 3b 27 bb |. .....?).'k';'.| 00000040 ff ff ff ff ff ff 27 bb ff ff 29 eb 0c 20 10 d8 |......'...).. ..| 00000050 0f 52 00 00 24 4a 99 00 8b 8e 03 e1 ac 01 27 38 |.R..$J........'8| 00000060 7a 75 7a 75 fb bd d5 5c 4a 0f 82 ff 81 bd 3d 36 |zuzu...\J.....=6| 00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................| 00000080 ff e7 ff ff 21 dc ff ff |....!...| 00000088 Do we need a fixup to tell the erase die to be faster? I haven't found the 'BFPT' term in the JEDEC spec. > real 0m5.485s > user 0m0.000s > sys 0m5.461s Before erasing, did the flash contain 128MB of random data on your test? On my tests, when the flash contains 128MB of random data, the first erase takes 4 minutes. Subsequent erases take only 2 seconds. Thanks _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel