From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-out.m-online.net ([212.18.0.9]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1g5HzU-0005j1-64 for linux-mtd@lists.infradead.org; Wed, 26 Sep 2018 22:09:06 +0000 From: Lukasz Majewski To: Frieder Schrempf , boris.brezillon@bootlin.com, Mark Rutland Cc: linux-mtd@lists.infradead.org, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, yogeshnarayan.gaur@nxp.com, richard@nod.at, Stefan Agner , Fabio Estevam , Fabio Estevam , prabhakar.kushwaha@nxp.com, han.xu@nxp.com, broonie@kernel.org, david.wolfe@nxp.com, computersforpeace@gmail.com, dwmw2@infradead.org, albert.aribaud@3adev.fr, Lukasz Majewski Subject: [RFC/RFT PATCH v1 5/9] mtd: spi: Provide LUT entry to perform DUAL read Date: Thu, 27 Sep 2018 00:07:35 +0200 Message-Id: <20180926220739.620-6-lukma@denx.de> In-Reply-To: <20180926220739.620-1-lukma@denx.de> References: <20180926220739.620-1-lukma@denx.de> List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This commit adds LUT sequence to perform DUAL read (as opposite to the default QUAD for this controller). Signed-off-by: Lukasz Majewski --- drivers/mtd/spi-nor/fsl-quadspi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c index 4f0c78ba6fcb..0c381cdfb39f 100644 --- a/drivers/mtd/spi-nor/fsl-quadspi.c +++ b/drivers/mtd/spi-nor/fsl-quadspi.c @@ -207,6 +207,7 @@ #define SEQID_RDCR 9 #define SEQID_EN4B 10 #define SEQID_BRWR 11 +#define SEQID_DUAL_READ 12 #define QUADSPI_MIN_IOMAP SZ_4M @@ -482,6 +483,15 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q) qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_BRWR), base + QUADSPI_LUT(lut_base)); + /* Dual Read */ + lut_base = SEQID_DUAL_READ * 4; + + qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_READ_1_1_2) | + LUT1(ADDR, PAD1, addrlen), base + QUADSPI_LUT(lut_base)); + qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) | + LUT1(FSL_READ, PAD2, rxfifo), + base + QUADSPI_LUT(lut_base + 1)); + fsl_qspi_lock_lut(q); } @@ -513,6 +523,8 @@ static int fsl_qspi_get_seqid(struct fsl_qspi *q, u8 cmd) return SEQID_EN4B; case SPINOR_OP_BRWR: return SEQID_BRWR; + case SPINOR_OP_READ_1_1_2: + return SEQID_DUAL_READ; default: if (cmd == q->nor[0].erase_opcode) return SEQID_SE; -- 2.11.0