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Tue, 21 May 2019 07:44:48 -0700 (PDT) From: Kamal Dasu To: linux-mtd@lists.infradead.org Subject: [PATCH v3 2/2] mtd: nand: raw: brcmnand: fallback to detected ecc-strength, ecc-step-size Date: Tue, 21 May 2019 10:44:22 -0400 Message-Id: <1558449865-36852-2-git-send-email-kdasu.kdev@gmail.com> X-Mailer: git-send-email 1.9.0.138.g2de3478 In-Reply-To: <1558449865-36852-1-git-send-email-kdasu.kdev@gmail.com> References: <1558449865-36852-1-git-send-email-kdasu.kdev@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190521_074450_426852_B2FA81D3 X-CRM114-Status: GOOD ( 13.98 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vignesh Raghavendra , Kamal Dasu , Richard Weinberger , linux-kernel@vger.kernel.org, Marek Vasut , bcm-kernel-feedback-list@broadcom.com, Miquel Raynal , Brian Norris , David Woodhouse MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org This change supports nand-ecc-step-size and nand-ecc-strength fields in brcmnand DT node to be optional. see: Documentation/devicetree/bindings/mtd/brcm,brcmnand.txt If both nand-ecc-strength and nand-ecc-step-size are not specified in device tree node for NAND, raw NAND layer does detect ECC information by reading ONFI extended parameter page for parts using ONFI >= 2.1. In case of non-ONFI NAND parts there could be a nand_id table entry with ECC information. If there is valid device tree entry for nand-ecc-strength and nand-ecc-step-size fields it still shall override the detected values. Signed-off-by: Kamal Dasu --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index ce0b8ff..1bdd490 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -2144,6 +2144,17 @@ static int brcmnand_setup_dev(struct brcmnand_host *host) return -EINVAL; } + if (chip->ecc.mode != NAND_ECC_NONE && + (!chip->ecc.size || !chip->ecc.strength)) { + if (chip->base.eccreq.step_size && chip->base.eccreq.strength) { + /* use detected ECC parameters */ + chip->ecc.size = chip->base.eccreq.step_size; + chip->ecc.strength = chip->base.eccreq.strength; + dev_info(ctrl->dev, "Using ECC step-size %d, strength %d\n", + chip->ecc.size, chip->ecc.strength); + } + } + switch (chip->ecc.size) { case 512: if (chip->ecc.algo == NAND_ECC_HAMMING) -- 1.9.0.138.g2de3478 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/