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From: Pratyush Yadav <p.yadav@ti.com>
To: Tudor Ambarus <tudor.ambarus@microchip.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	<linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>,
	Sekhar Nori <nsekhar@ti.com>, Pratyush Yadav <p.yadav@ti.com>
Subject: [PATCH v16 06/15] mtd: spi-nor: core: use dummy cycle and address width info from SFDP
Date: Mon, 5 Oct 2020 21:01:29 +0530
Message-ID: <20201005153138.6437-7-p.yadav@ti.com> (raw)
In-Reply-To: <20201005153138.6437-1-p.yadav@ti.com>

The xSPI Profile 1.0 table specifies how many dummy cycles and address
bytes are needed for the Read Status Register command in octal DTR mode.
Use that information to send the correct Read SR command.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
 drivers/mtd/spi-nor/core.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index ad280874a2e8..b5bb4d6cffc1 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -385,6 +385,11 @@ static int spi_nor_read_sr(struct spi_nor *nor, u8 *sr)
 				   SPI_MEM_OP_NO_DUMMY,
 				   SPI_MEM_OP_DATA_IN(1, sr, 0));
 
+		if (nor->reg_proto == SNOR_PROTO_8_8_8_DTR) {
+			op.addr.nbytes = nor->params->rdsr_addr_nbytes;
+			op.dummy.nbytes = nor->params->rdsr_dummy;
+		}
+
 		spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
@@ -418,6 +423,11 @@ static int spi_nor_read_fsr(struct spi_nor *nor, u8 *fsr)
 				   SPI_MEM_OP_NO_DUMMY,
 				   SPI_MEM_OP_DATA_IN(1, fsr, 0));
 
+		if (nor->reg_proto == SNOR_PROTO_8_8_8_DTR) {
+			op.addr.nbytes = nor->params->rdsr_addr_nbytes;
+			op.dummy.nbytes = nor->params->rdsr_dummy;
+		}
+
 		spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
-- 
2.28.0


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Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-05 15:31 [PATCH v16 00/15] mtd: spi-nor: add xSPI Octal DTR support Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 01/15] mtd: spi-nor: core: use EOPNOTSUPP instead of ENOTSUPP Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 02/15] mtd: spi-nor: add spi_nor_controller_ops_{read_reg, write_reg, erase}() Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 03/15] mtd: spi-nor: add support for DTR protocol Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 04/15] mtd: spi-nor: sfdp: get command opcode extension type from BFPT Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 05/15] mtd: spi-nor: sfdp: parse xSPI Profile 1.0 table Pratyush Yadav
2020-10-27  9:58   ` Tudor.Ambarus
2020-10-05 15:31 ` Pratyush Yadav [this message]
2020-10-05 15:31 ` [PATCH v16 07/15] mtd: spi-nor: core: do 2 byte reads for SR and FSR in DTR mode Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 08/15] mtd: spi-nor: Introduce SNOR_F_IO_MODE_EN_VOLATILE Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 09/15] mtd: spi-nor: Parse SFDP SCCR Map Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 10/15] mtd: spi-nor: core: enable octal DTR mode when possible Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 11/15] mtd: spi-nor: sfdp: detect Soft Reset sequence support from BFPT Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 12/15] mtd: spi-nor: core: perform a Soft Reset on shutdown Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 13/15] mtd: spi-nor: core: disable Octal DTR mode on suspend Pratyush Yadav
2020-10-05 15:31 ` [PATCH v16 14/15] mtd: spi-nor: spansion: add support for Cypress Semper flash Pratyush Yadav
2020-11-07  7:58   ` Vignesh Raghavendra
2020-11-09 11:45     ` Pratyush Yadav
2020-11-09 13:28     ` Tudor.Ambarus
2020-10-05 15:31 ` [PATCH v16 15/15] mtd: spi-nor: micron-st: allow using MT35XU512ABA in Octal DTR mode Pratyush Yadav
2020-10-06  8:11   ` Tudor.Ambarus
2020-10-28  7:53 ` [PATCH v16 00/15] mtd: spi-nor: add xSPI Octal DTR support Tudor.Ambarus
2020-10-28 12:49   ` Pratyush Yadav
2020-10-28 15:21     ` Tudor.Ambarus
2020-10-28 20:02       ` Pratyush Yadav
2020-10-29  6:26       ` Vignesh Raghavendra
2020-11-09 17:25 ` Vignesh Raghavendra

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