From: Pratyush Yadav <p.yadav@ti.com>
To: Vignesh Raghavendra <vigneshr@ti.com>
Cc: Tudor Ambarus <tudor.ambarus@microchip.com>,
Richard Weinberger <richard@nod.at>, Sekhar Nori <nsekhar@ti.com>,
linux-kernel@vger.kernel.org,
Boris Brezillon <boris.brezillon@collabora.com>,
linux-mtd@lists.infradead.org,
Miquel Raynal <miquel.raynal@bootlin.com>
Subject: Re: [PATCH v16 14/15] mtd: spi-nor: spansion: add support for Cypress Semper flash
Date: Mon, 9 Nov 2020 17:15:43 +0530 [thread overview]
Message-ID: <20201109114541.g6phaz36glhkpajz@ti.com> (raw)
In-Reply-To: <7d058da8-90ef-8f71-fe86-cc0b27a2895a@ti.com>
On 07/11/20 01:28PM, Vignesh Raghavendra wrote:
> Hi,
>
> [...]
>
> On 10/5/20 9:01 PM, Pratyush Yadav wrote:
> > +static int spi_nor_cypress_octal_dtr_enable(struct spi_nor *nor, bool enable)
> > +{
> > + struct spi_mem_op op;
> > + u8 *buf = nor->bouncebuf;
> > + int ret;
> > +
> > + if (enable) {
> > + /* Use 24 dummy cycles for memory array reads. */
> > + ret = spi_nor_write_enable(nor);
> > + if (ret)
> > + return ret;
> > +
> > + *buf = SPINOR_REG_CYPRESS_CFR2V_MEMLAT_11_24;
> > + op = (struct spi_mem_op)
> > + SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WR_ANY_REG, 1),
> > + SPI_MEM_OP_ADDR(3, SPINOR_REG_CYPRESS_CFR2V,
> > + 1),
> > + SPI_MEM_OP_NO_DUMMY,
> > + SPI_MEM_OP_DATA_OUT(1, buf, 1));
> > +
> > + ret = spi_mem_exec_op(nor->spimem, &op);
> > + if (ret)
> > + return ret;
> > +
> > + ret = spi_nor_wait_till_ready(nor);
> > + if (ret)
> > + return ret;
> > +
> > + nor->read_dummy = 24;
> > + }
> > +
> > + /* Set/unset the octal and DTR enable bits. */
> > + ret = spi_nor_write_enable(nor);
> > + if (ret)
> > + return ret;
> > +
> > + if (enable)
> > + *buf = SPINOR_REG_CYPRESS_CFR5V_OCT_DTR_EN;
> > + else
> > + *buf = SPINOR_REG_CYPRESS_CFR5V_OCT_DTR_DS;
> > +
> > + op = (struct spi_mem_op)
> > + SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WR_ANY_REG, 1),
> > + SPI_MEM_OP_ADDR(enable ? 3 : 4,
> > + SPINOR_REG_CYPRESS_CFR5V,
> > + 1),
> > + SPI_MEM_OP_NO_DUMMY,
> > + SPI_MEM_OP_DATA_OUT(1, buf, 1));
> > +
> > + if (!enable)
> > + spi_nor_spimem_setup_op(nor, &op, SNOR_PROTO_8_8_8_DTR);
> > +
> > + ret = spi_mem_exec_op(nor->spimem, &op);
> > + if (ret)
> > + return ret;
> > +
> > + /* Give some time for the mode change to take place. */
> > + usleep_range(1000, 1500);
> > +
>
> This delay is no longer needed right? I can drop it while applying, if
> you confirm.
Yes, this delay is not needed. Please drop it while applying.
> Tudor: Could you provide your R-by?
>
> Regards
> Vignesh
--
Regards,
Pratyush Yadav
Texas Instruments India
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next prev parent reply other threads:[~2020-11-09 11:47 UTC|newest]
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 ` [PATCH v16 06/15] mtd: spi-nor: core: use dummy cycle and address width info from SFDP Pratyush Yadav
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 [this message]
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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