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Wed, 24 Jan 2024 19:13:47 -0800 (PST) Received: from [192.168.52.129] ([192.19.222.250]) by smtp.gmail.com with ESMTPSA id t3-20020a170902a5c300b001d755ec4bc0sm5328111plq.241.2024.01.24.19.13.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Jan 2024 19:13:47 -0800 (PST) Message-ID: <48f3c65f-4e27-42d8-b32a-3889329303c2@broadcom.com> Date: Wed, 24 Jan 2024 19:13:45 -0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 06/10] mtd: rawnand: brcmnand: Add support for getting ecc setting from strap To: Miquel Raynal , David Regan Cc: dregan@mail.com, richard@nod.at, vigneshr@ti.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, computersforpeace@gmail.com, kdasu.kdev@gmail.com, linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, joel.peshkin@broadcom.com, tomer.yacoby@broadcom.com, dan.beygelman@broadcom.com, anand.gore@broadcom.com, kursad.oney@broadcom.com, florian.fainelli@broadcom.com, rafal@milecki.pl, bcm-kernel-feedback-list@broadcom.com, andre.przywara@arm.com, baruch@tkos.co.il, linux-arm-kernel@lists.infradead.org, dan.carpenter@linaro.org References: <20240124030458.98408-1-dregan@broadcom.com> <20240124030458.98408-7-dregan@broadcom.com> <20240124183207.5898cbfd@xps-13> From: William Zhang In-Reply-To: <20240124183207.5898cbfd@xps-13> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240124_191353_532357_8B938520 X-CRM114-Status: GOOD ( 19.01 ) 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-Type: multipart/mixed; boundary="===============7783851290227180631==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============7783851290227180631== Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000006aec81060fbc9152" --0000000000006aec81060fbc9152 Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Miquel, On 1/24/24 09:32, Miquel Raynal wrote: > Hi David, > >> @@ -2622,19 +2667,43 @@ static int brcmnand_setup_dev(struct brcmnand_host *host) >> nanddev_get_memorg(&chip->base); >> struct brcmnand_controller *ctrl = host->ctrl; >> struct brcmnand_cfg *cfg = &host->hwcfg; >> - char msg[128]; >> + struct device_node *np = nand_get_flash_node(chip); >> u32 offs, tmp, oob_sector; >> - int ret; >> + int ret, sector_size_1k = 0; >> + bool use_strap = false; >> + char msg[128]; >> >> memset(cfg, 0, sizeof(*cfg)); >> + use_strap = of_property_read_bool(np, "brcm,nand-ecc-use-strap"); >> >> - ret = of_property_read_u32(nand_get_flash_node(chip), >> - "brcm,nand-oob-sector-size", >> + /* >> + * Set ECC size and strength based on hw configuration from strap >> + * if device tree does not specify them and use strap property is set >> + * If ecc strength is set in dts, don't use strap setting. >> + */ > > You would have to use the strap settings only if the property is set. > If not property is set, the default from the core should apply I guess. > Maybe the comment confuse you... I will make it more clear. But the logic here is exactly what you said. If no properties are set, the core value is already set in chip->ecc.strength and chip->ecc.size and it clear the use_strap flag too. >> + if (chip->ecc.strength) >> + use_strap = 0; >> + >> + if (use_strap) { >> + chip->ecc.strength = brcmnand_get_ecc_strength(host); >> + sector_size_1k = brcmnand_get_sector_size_1k(host); >> + if (chip->ecc.size == 0) { >> + if (sector_size_1k < 0) >> + chip->ecc.size = 512; >> + else >> + chip->ecc.size = 512 << sector_size_1k; >> + } >> + } >> + >> + ret = of_property_read_u32(np, "brcm,nand-oob-sector-size", >> &oob_sector); >> if (ret) { >> - /* Use detected size */ >> - cfg->spare_area_size = mtd->oobsize / >> - (mtd->writesize >> FC_SHIFT); >> + if (use_strap) >> + cfg->spare_area_size = brcmnand_get_spare_size(host); >> + else >> + /* Use detected size */ >> + cfg->spare_area_size = mtd->oobsize / >> + (mtd->writesize >> FC_SHIFT); >> } else { >> cfg->spare_area_size = oob_sector; >> } > > > Thanks, > Miquèl --0000000000006aec81060fbc9152 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