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Mon, 8 Apr 2024 12:10:20 +0300 From: Arseniy Krasnov To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl CC: , , , , , , , Arseniy Krasnov Subject: [PATCH v2 0/2] Meson: R/W support for pages used by boot ROM Date: Mon, 8 Apr 2024 11:59:29 +0300 Message-ID: <20240408085931.456337-1-avkrasnov@salutedevices.com> X-Mailer: git-send-email 2.35.0 MIME-Version: 1.0 X-Originating-IP: [100.64.160.123] X-ClientProxiedBy: p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) To p-i-exch-sc-m02.sberdevices.ru (172.16.192.103) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 184614 [Apr 08 2024] X-KSMG-AntiSpam-Version: 6.1.0.4 X-KSMG-AntiSpam-Envelope-From: avkrasnov@salutedevices.com X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 15 0.3.15 adb41f89e2951eb37b279104a7abb8e79494a5e7, {Tracking_from_domain_doesnt_match_to}, smtp.sberdevices.ru:5.0.1,7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;salutedevices.com:7.1.1;127.0.0.199:7.1.2;100.64.160.123:7.1.2, FromAlignment: s, ApMailHostAddress: 100.64.160.123 X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean X-KSMG-LinksScanning: Clean X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2024/04/08 06:07:00 #24706059 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240408_021028_364488_F88B2AFF X-CRM114-Status: GOOD ( 12.31 ) 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 Amlogic's boot ROM code needs that some pages on NAND must be written in special "short" ECC mode with scrambling enabled. Such pages: 1) Contain some metadata about hardware. 2) Located with some interval starting from 0 offset, until some specified offset. Interval and second offset are set in the device tree. This patchset adds R/W support for such pages. To enable it we can setup it in dts: nand-is-boot-medium; amlogic,boot-page-last = <1024>; amlogic,boot-page-step = <128>; It means that each 128th page in range 0 to 1024 pages will be accessed in special mode ("short" ECC + scrambling). In practice this feature is needed when we want to update first block of NAND - driver will enable required mode by itself using value from device tree. Changelog: v1 -> v2: * Rename 'meson,boot-page-XXX' -> 'amlogic,boot-page-XXX'. * Add words that 'amlogic,boot-page-step' is measured in pages. * Remove words that 'amlogic,boot-page-XXX' depends on 'nand-is-boot-medium'. * Make both 'amlogic,boot-page-XXX' depend on each other also, in addition to 'nand-is-boot-medium' dependency. Arseniy Krasnov (2): dt-bindings: mtd: amlogic,meson-nand: support fields for boot ROM code mtd: rawnand: meson: support R/W mode for boot ROM .../bindings/mtd/amlogic,meson-nand.yaml | 14 +++ drivers/mtd/nand/raw/meson_nand.c | 88 +++++++++++++------ 2 files changed, 73 insertions(+), 29 deletions(-)