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Fri, 17 May 2019 11:34:07 -0700 (PDT) From: Kamal Dasu To: linux-mtd@lists.infradead.org Subject: [PATCH 2/2] mtd: nand: raw: brcmnand: fallback to detected ecc-strength, ecc-step-size Date: Fri, 17 May 2019 14:29:55 -0400 Message-Id: <1558117914-35807-2-git-send-email-kdasu.kdev@gmail.com> X-Mailer: git-send-email 1.9.0.138.g2de3478 In-Reply-To: <1558117914-35807-1-git-send-email-kdasu.kdev@gmail.com> References: <1558117914-35807-1-git-send-email-kdasu.kdev@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190517_113409_542464_D1FC06B1 X-CRM114-Status: GOOD ( 15.80 ) 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-strenght 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, nand_base driver does detect onfi ext ecc info from ONFI extended parameter page for parts using ONFI >= 2.1. In case of non-onfi NAND there could be a nand_id table entry with the ecc info. If there is a 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 | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index ce0b8ff..e967b30 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -2144,6 +2144,16 @@ static int brcmnand_setup_dev(struct brcmnand_host *host) return -EINVAL; } + if (!(chip->ecc.size > 0 && chip->ecc.strength > 0) && + (chip->base.eccreq.strength > 0 && + chip->base.eccreq.step_size > 0)) { + /* use detected ecc parameters */ + chip->ecc.size = chip->base.eccreq.step_size; + chip->ecc.strength = chip->base.eccreq.strength; + pr_info("Using detected nand-ecc-step-size %d, nand-ecc-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/