[{"id":3680291,"web_url":"http://patchwork.ozlabs.org/comment/3680291/","msgid":"<87a4uv5set.fsf@bootlin.com>","list_archive_url":null,"date":"2026-04-22T08:08:10","subject":"Re: [PATCH v9 2/3] mtd: spi-nand: Add support for randomizer","submitter":{"id":73368,"url":"http://patchwork.ozlabs.org/api/people/73368/","name":"Miquel Raynal","email":"miquel.raynal@bootlin.com"},"content":"Hi Cheng Ming,\n\n> +static int spinand_randomizer_init(struct spinand_device *spinand)\n> +{\n> +\tstruct device_node *np = spinand->spimem->spi->dev.of_node;\n> +\tu32 rand_val;\n> +\tint ret;\n> +\n> +\tif (!spinand->set_randomizer)\n> +\t\treturn 0;\n> +\n> +\tret = of_property_read_u32(np, \"nand-randomizer\", &rand_val);\n> +\tif (ret)\n> +\t\treturn 0;\n> +\n> +\treturn spinand->set_randomizer(spinand, rand_val == 1);\n\nYou do not need the \"== 1\" part. rand_val is cast into a boolean, so any\nnon zero value will be taken understood as an \"enable\" and zero will be\ntreated as \"disable\", which is fine.\n\nThe rest looks fine.\n\nThanks,\nMiquèl","headers":{"Return-Path":"\n <linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org>","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=lists.infradead.org header.i=@lists.infradead.org\n header.a=rsa-sha256 header.s=bombadil.20210309 header.b=2wacaxAn;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256\n header.s=dkim header.b=M/Ss/FQB;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=lists.infradead.org\n (client-ip=2607:7c80:54:3::133; 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a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=lists.infradead.org; s=bombadil.20210309; h=Sender:\n\tContent-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post:\n\tList-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:References\n\t:In-Reply-To:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:\n\tResent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:\n\tList-Owner; bh=FfRWZ6wlNnh3Urw0dmNPv93D7eqauxzYPzoYr13HC5k=; b=2wacaxAnBWfwFM\n\tTeF9s+VKa14JPHHwbJ2Jd2uJxa8mgynHqLuvU5vbmtjmUJIlt+KweYtMQMW4ErfG0fCn/Wwy/04C6\n\tFD+6tFHs9S9cFjD7WzIzLYf2jVUp4fKrlEg4bpROuV9ISZ+OU/maVaTeVSeoC/xJdNlPusPTNpLQa\n\tXLeXIoVWbLI+vyTrJNa27VnswBKnpV9Otaw7BCqYmwr2RJywgs1LNiCjxWkTCYrsUQRmEtHHp47Vd\n\tyy6OuLHLwH1DQ3FXyhaii0uEtRcr9rDMVsouFGFBjoKUpnr/Cc0qhLQA9Btjg6MxjWlm01TCRz/S/\n\tUuGF9uFNUTGvfM3qN4YA==;","v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim;\n\tt=1776845296; h=from:subject:date:message-id:to:cc:mime-version:content-type:\n\t content-transfer-encoding:in-reply-to:references;\n\tbh=Ok/jDao3QWG80+zWCp1k65124isQJzzQbc2D1YJo5sA=;\n\tb=M/Ss/FQBq/QU57FoaB+yrUWa8nP1Z4ZxnvQO2psZ7Wbhqswl57GHd27JnXUpvuyqAMzUMi\n\t9NuBBXAv51qpepXszjoSlQbbOWwzCGzvy0pos0FO2fCVICOMjktJHE1zJQwCrxD7z8ZTUb\n\tFECM0gD/gh285SVjsm9QygsHvBgj+MPfFIBxsx58hOqYbsz6BCksKqtoo4NcweibazK/r8\n\tRovbaHM1aIY/dZREHsuzsCCG9NNykN7WNEJummlJB3av+Hk6CVvy7ghFooWYNPFyd3jdja\n\tQgQF5dBZmxeiNyUzBP4nkJ63w1lrD0KJMkPa7vv3d0hTLASfvdZ9+9OauI0vVg=="],"From":"Miquel Raynal <miquel.raynal@bootlin.com>","To":"Cheng Ming Lin <linchengming884@gmail.com>","Cc":"richard@nod.at,  vigneshr@ti.com,  robh@kernel.org,  krzk+dt@kernel.org,\n  conor+dt@kernel.org,  linux-mtd@lists.infradead.org,\n  devicetree@vger.kernel.org,  linux-kernel@vger.kernel.org,\n  alvinzhou@mxic.com.tw,  Cheng Ming Lin <chengminglin@mxic.com.tw>","Subject":"Re: [PATCH v9 2/3] mtd: spi-nand: Add support for randomizer","In-Reply-To":"<20260422070203.698716-3-linchengming884@gmail.com> (Cheng Ming\n\tLin's message of \"Wed, 22 Apr 2026 15:02:02 +0800\")","References":"<20260422070203.698716-1-linchengming884@gmail.com>\n\t<20260422070203.698716-3-linchengming884@gmail.com>","User-Agent":"mu4e 1.12.7; emacs 30.2","Date":"Wed, 22 Apr 2026 10:08:10 +0200","Message-ID":"<87a4uv5set.fsf@bootlin.com>","MIME-Version":"1.0","X-Last-TLS-Session-Version":"TLSv1.3","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20260422_010822_856053_A4DD00A6 ","X-CRM114-Status":"UNSURE (   5.33  )","X-CRM114-Notice":"Please train this message.","X-Spam-Score":"-2.1 (--)","X-Spam-Report":"Spam detection software,\n running on the system \"bombadil.infradead.org\",\n has NOT identified this incoming email as spam.  The original\n message has been attached to this so you can view it or label\n similar future email.  If you have any questions, see\n the administrator of that system for details.\n Content preview:  Hi Cheng Ming, > +static int spinand_randomizer_init(struct\n    spinand_device *spinand) > +{ > + struct device_node *np =\n spinand->spimem->spi->dev.of_node;\n    > + u32 rand_val; > + int ret; > + > + if (!spinand->set_rand [...]\n Content analysis details:   (-2.1 points, 5.0 required)\n  pts rule name              description\n ---- ----------------------\n --------------------------------------------------\n -0.0 SPF_PASS               SPF: sender matches SPF record\n -0.0 SPF_HELO_PASS          SPF: HELO matches SPF record\n -0.1 DKIM_VALID             Message has at least one valid DKIM or DK\n signature\n -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from\n author's\n                             domain\n -0.1 DKIM_VALID_EF          Message has a valid DKIM or DK signature from\n                             envelope-from domain\n  0.1 DKIM_SIGNED            Message has a DKIM or DK signature,\n not necessarily valid\n -1.9 BAYES_00               BODY: Bayes spam probability is 0 to 1%\n                             [score: 0.0000]","X-BeenThere":"linux-mtd@lists.infradead.org","X-Mailman-Version":"2.1.34","Precedence":"list","List-Id":"Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>","List-Unsubscribe":"<http://lists.infradead.org/mailman/options/linux-mtd>,\n <mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>","List-Archive":"<http://lists.infradead.org/pipermail/linux-mtd/>","List-Post":"<mailto:linux-mtd@lists.infradead.org>","List-Help":"<mailto:linux-mtd-request@lists.infradead.org?subject=help>","List-Subscribe":"<http://lists.infradead.org/mailman/listinfo/linux-mtd>,\n <mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Sender":"\"linux-mtd\" <linux-mtd-bounces@lists.infradead.org>","Errors-To":"linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org"}},{"id":3680298,"web_url":"http://patchwork.ozlabs.org/comment/3680298/","msgid":"<CAAyq3SYZdeWhtAbrp6HuQPLdsHEwvXUAFn2BAiD6YmE9FuZyPQ@mail.gmail.com>","list_archive_url":null,"date":"2026-04-22T08:14:26","subject":"Re: [PATCH v9 2/3] mtd: spi-nand: Add support for randomizer","submitter":{"id":88631,"url":"http://patchwork.ozlabs.org/api/people/88631/","name":"Cheng Ming Lin","email":"linchengming884@gmail.com"},"content":"Hi Miquel,\n\nMiquel Raynal <miquel.raynal@bootlin.com> 於 2026年4月22日週三 下午4:08寫道：\n>\n> Hi Cheng Ming,\n>\n> > +static int spinand_randomizer_init(struct spinand_device *spinand)\n> > +{\n> > +     struct device_node *np = spinand->spimem->spi->dev.of_node;\n> > +     u32 rand_val;\n> > +     int ret;\n> > +\n> > +     if (!spinand->set_randomizer)\n> > +             return 0;\n> > +\n> > +     ret = of_property_read_u32(np, \"nand-randomizer\", &rand_val);\n> > +     if (ret)\n> > +             return 0;\n> > +\n> > +     return spinand->set_randomizer(spinand, rand_val == 1);\n>\n> You do not need the \"== 1\" part. rand_val is cast into a boolean, so any\n> non zero value will be taken understood as an \"enable\" and zero will be\n> treated as \"disable\", which is fine.\n\nGot it, thanks for the tip. I will drop the \"== 1\" part and rely on the\nimplicit boolean cast in the next version.\n\nSince the rest of the patch looks fine to you, I will wait for the Device\nTree maintainers' feedback on the dt-binding patch (Patch 1/3) before\nspinning v10 to avoid spamming the list.\n\n>\n> The rest looks fine.\n>\n> Thanks,\n> Miquèl\n\nThanks,\nCheng Ming Lin","headers":{"Return-Path":"\n <linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org>","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=lists.infradead.org header.i=@lists.infradead.org\n header.a=rsa-sha256 header.s=bombadil.20210309 header.b=UDVe/LFm;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=YQPMeA0j;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=lists.infradead.org\n (client-ip=2607:7c80:54:3::133; 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Wed, 22 Apr 2026\n 01:15:29 -0700 (PDT)","MIME-Version":"1.0","References":"<20260422070203.698716-1-linchengming884@gmail.com>\n <20260422070203.698716-3-linchengming884@gmail.com>\n <87a4uv5set.fsf@bootlin.com>","In-Reply-To":"<87a4uv5set.fsf@bootlin.com>","From":"Cheng Ming Lin <linchengming884@gmail.com>","Date":"Wed, 22 Apr 2026 16:14:26 +0800","X-Gm-Features":"AQROBzCXDwT8wfI3IxhKZWv7FK4oUhFYcEJUA7pBhDvdYOh76PDtet4MkYQV5Ps","Message-ID":"\n <CAAyq3SYZdeWhtAbrp6HuQPLdsHEwvXUAFn2BAiD6YmE9FuZyPQ@mail.gmail.com>","Subject":"Re: [PATCH v9 2/3] mtd: spi-nand: Add support for randomizer","To":"Miquel Raynal <miquel.raynal@bootlin.com>","Cc":"richard@nod.at, vigneshr@ti.com, robh@kernel.org, krzk+dt@kernel.org,\n\tconor+dt@kernel.org, linux-mtd@lists.infradead.org,\n\tdevicetree@vger.kernel.org, linux-kernel@vger.kernel.org,\n\talvinzhou@mxic.com.tw, Cheng Ming Lin <chengminglin@mxic.com.tw>","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20260422_011530_295503_729AB317 ","X-CRM114-Status":"GOOD (  13.65  )","X-Spam-Score":"-1.8 (-)","X-Spam-Report":"=?unknown-8bit?q?Spam_detection_software=2C_running_on_the_sy?=\n\t=?unknown-8bit?q?stem_=22bombadil=2Einfradead=2Eorg=22=2C?=\n\t=?unknown-8bit?q?_has_NOT_identified_this_incoming_email_as_spam=2E__The_ori?=\n\t=?unknown-8bit?q?ginal?=\n\t=?unknown-8bit?q?_message_has_been_attached_to_this_so_you_can_view_it_or_la?=\n\t=?unknown-8bit?q?bel?=\n\t=?unknown-8bit?q?_similar_future_email=2E__If_you_have_any_questions=2C_see?=\n\t=?unknown-8bit?q?_the_administrator_of_that_system_for_details=2E?=\n\t=?unknown-8bit?q?_?=\n\t=?unknown-8bit?b?IENvbnRlbnQgcHJldmlldzogIEhpIE1pcXVlbCwgTWlxdWVsIFJheW5h?=\n\t=?unknown-8bit?b?bCDmlrwgMjAyNuW5tDTmnIgyMuaXpemAseS4iSDkuIvljYg0OjA45a+r?=\n\t=?unknown-8bit?b?6YGT77ya?=\n\t=?unknown-8bit?q?_=3E_=3E_Hi_Cheng_Ming=2C_=3E_=3E_=3E_+static_int_spinand?=\n\t=?unknown-8bit?q?=5Frandomizer=5Finit=28struct_spinand=5Fdevice?=\n\t=?unknown-8bit?b?ICpzcGluYW5kKSA+ID4gK3sgPiA+ICsgc3RydWN0IGRldmljZV9ub2Rl?=\n\t=?unknown-8bit?b?ICpucCA9IHNwaW5hbiBbLi4uXSA=?=\n\t=?unknown-8bit?q?_?=\n\t=?unknown-8bit?q?_Content_analysis_details=3A___=28-1=2E8_points=2C_5=2E0_re?=\n\t=?unknown-8bit?q?quired=29?=\n\t=?unknown-8bit?q?_?=\n\t=?unknown-8bit?q?_pts_rule_name______________description?=\n\t=?unknown-8bit?q?_----_----------------------_------------------------------?=\n\t=?unknown-8bit?q?--------------------?=\n\t=?unknown-8bit?q?_-0=2E0_RCVD=5FIN=5FDNSWL=5FNONE_____RBL=3A_Sender_listed_a?=\n\t=?unknown-8bit?q?t_https=3A//www=2Ednswl=2Eorg/=2C_no?=\n\t=?unknown-8bit?q?_trust?=\n\t=?unknown-8bit?b?IFsyNjA3OmY4YjA6NDg2NDoyMDowOjA6MDoxMDMyIGxpc3RlZCBpbl0=?=\n\t=?unknown-8bit?b?IFtsaXN0LmRuc3dsLm9yZ10=?=\n\t=?unknown-8bit?q?_0=2E0_SPF=5FHELO=5FNONE__________SPF=3A_HELO_does_not_publ?=\n\t=?unknown-8bit?q?ish_an_SPF_Record?=\n\t=?unknown-8bit?q?_-0=2E0_SPF=5FPASS_______________SPF=3A_sender_matches_SPF_?=\n\t=?unknown-8bit?q?record?=\n\t=?unknown-8bit?q?_-0=2E1_DKIM=5FVALID_____________Message_has_at_least_one_v?=\n\t=?unknown-8bit?q?alid_DKIM_or_DK_signature?=\n\t=?unknown-8bit?q?_-0=2E1_DKIM=5FVALID=5FAU__________Message_has_a_valid_DKIM?=\n\t=?unknown-8bit?q?_or_DK_signature_from_author=27s?=\n\t=?unknown-8bit?q?_domain?=\n\t=?unknown-8bit?q?_-0=2E1_DKIM=5FVALID=5FEF__________Message_has_a_valid_DKIM?=\n\t=?unknown-8bit?q?_or_DK_signature_from?=\n\t=?unknown-8bit?q?_envelope-from_domain?=\n\t=?unknown-8bit?q?_0=2E1_DKIM=5FSIGNED____________Message_has_a_DKIM_or_DK_si?=\n\t=?unknown-8bit?q?gnature=2C_not_necessarily_valid?=\n\t=?unknown-8bit?q?_-1=2E9_BAYES=5F00_______________BODY=3A_Bayes_spam_probabi?=\n\t=?unknown-8bit?q?lity_is_0_to_1=25?=\n\t=?unknown-8bit?q?_=5Bscore=3A_0=2E0000=5D?=\n\t=?unknown-8bit?q?_0=2E0_FREEMAIL=5FFROM__________Sender_email_is_commonly_ab?=\n\t=?unknown-8bit?q?used_enduser_mail_provider?=\n\t=?unknown-8bit?q?_=5Blinchengming884=28at=29gmail=2Ecom=5D?=\n\t=?unknown-8bit?q?_0=2E2_FREEMAIL=5FENVFROM=5FEND=5FDIGIT_Envelope-from_freem?=\n\t=?unknown-8bit?q?ail_username_ends_in?=\n\t=?unknown-8bit?q?_digit?=\n\t=?unknown-8bit?q?_=5Blinchengming884=28at=29gmail=2Ecom=5D?=","X-BeenThere":"linux-mtd@lists.infradead.org","X-Mailman-Version":"2.1.34","Precedence":"list","List-Id":"Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>","List-Unsubscribe":"<http://lists.infradead.org/mailman/options/linux-mtd>,\n <mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>","List-Archive":"<http://lists.infradead.org/pipermail/linux-mtd/>","List-Post":"<mailto:linux-mtd@lists.infradead.org>","List-Help":"<mailto:linux-mtd-request@lists.infradead.org?subject=help>","List-Subscribe":"<http://lists.infradead.org/mailman/listinfo/linux-mtd>,\n <mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>","Content-Type":"text/plain; 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