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From: Sean Anderson <seanga2@gmail.com>
To: u-boot@lists.denx.de
Subject: [PATCH v8 00/28] mtd: spi-nor-core: add xSPI Octal DTR support
Date: Mon, 5 Apr 2021 09:17:52 -0400	[thread overview]
Message-ID: <3c5f81bd-109f-34e2-697a-484e31f547ab@gmail.com> (raw)
In-Reply-To: <20210405074326.3xjcpy6e26gzbkhr@ti.com>


On 4/5/21 3:43 AM, Pratyush Yadav wrote:
> On 02/04/21 06:28PM, Sean Anderson wrote:
>> On 4/1/21 3:31 PM, Pratyush Yadav wrote:
>>> Hi,
>>>
>>> This series adds support for octal DTR flashes in the SPI NOR framework,
>>
>> As an overall question, is this the same as "DDR" mode?
> 
> Sort of...
> 
> DDR is "Double Data Rate" which implies that the "double" part only
> refers to the data phase. DTR is "Double Transfer Rate" which means the
> "double" part refers to all 3 (command, address, data) phases.
> 
> The underlying concept is the same: transfer data twice per clock cycle.
> 

Thanks. I have a datasheet which refers to DTR in the command, address,
and data phases as DDR, and I was wondering if it was the same idea.

--Sean

      reply	other threads:[~2021-04-05 13:17 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-01 19:31 [PATCH v8 00/28] mtd: spi-nor-core: add xSPI Octal DTR support Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 01/28] spi: spi-mem: allow specifying whether an op is DTR or not Pratyush Yadav
2021-04-02 22:21   ` Sean Anderson
2021-04-05  8:25     ` Pratyush Yadav
2021-04-05 11:47       ` Tom Rini
2021-04-05 13:12         ` Sean Anderson
2021-04-05 13:57           ` Pratyush Yadav
2021-04-05 14:58             ` Tom Rini
2021-04-01 19:31 ` [PATCH v8 02/28] spi: spi-mem: allow specifying a command's extension Pratyush Yadav
2021-04-02 22:29   ` Sean Anderson
2021-04-05  8:18     ` Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 03/28] spi: spi-mem: export spi_mem_default_supports_op() Pratyush Yadav
2021-04-02 22:09   ` Sean Anderson
2021-04-01 19:31 ` [PATCH v8 04/28] spi: spi-mem: add spi_mem_dtr_supports_op() Pratyush Yadav
2021-04-02 22:31   ` Sean Anderson
2021-04-05  7:40     ` Pratyush Yadav
2021-04-05 13:16       ` Sean Anderson
2021-04-01 19:31 ` [PATCH v8 05/28] spi: cadence-qspi: Do not calibrate when device tree sets read delay Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 06/28] spi: cadence-qspi: Add a small delay before indirect writes Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 07/28] spi: cadence-qspi: Add support for octal DTR flashes Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 08/28] arm: mvebu: x530: Use tiny SPI NOR Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 09/28] mtd: spi-nor-core: Fix address width on flash chips > 16MB Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 10/28] mtd: spi-nor-core: Add a ->setup() hook Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 11/28] mtd: spi-nor-core: Move SFDP related declarations to top Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 12/28] mtd: spi-nor-core: Introduce flash-specific fixup hooks Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 13/28] mtd: spi-nor-core: Rework hwcaps selection Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 14/28] mtd: spi-nor-core: Do not set data direction when there is no data Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 15/28] mtd: spi-nor-core: Add support for DTR protocol Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 16/28] mtd: spi-nor-core: prepare BFPT parsing for JESD216 rev D Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 17/28] mtd: spi-nor-core: Get command opcode extension type from BFPT Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 18/28] mtd: spi-nor-core: Parse xSPI Profile 1.0 table Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 19/28] mtd: spi-nor-core: Prepare Read SR and FSR for Octal DTR mode Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 20/28] mtd: spi-nor-core: Enable octal DTR mode when possible Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 21/28] mtd: spi-nor-core: Do not make invalid quad enable fatal Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 22/28] mtd: spi-nor-core: Detect Soft Reset sequence support from BFPT Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 23/28] mtd: spi-nor-core: Perform a Soft Reset on shutdown Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 24/28] mtd: spi-nor-core: Perform a Soft Reset on boot Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 25/28] mtd: spi-nor-core: allow truncated erases Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 26/28] mtd: spi-nor-core: Add non-uniform erase for Spansion/Cypress Pratyush Yadav
2021-04-06  1:48   ` Takahiro Kuwano
2021-04-06 10:46     ` Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 27/28] mtd: spi-nor-core: Add support for Cypress Semper flash Pratyush Yadav
2021-04-01 19:31 ` [PATCH v8 28/28] mtd: spi-nor-core: Allow using Micron mt35xu512aba in Octal DTR mode Pratyush Yadav
2021-04-02 22:28 ` [PATCH v8 00/28] mtd: spi-nor-core: add xSPI Octal DTR support Sean Anderson
2021-04-05  7:43   ` Pratyush Yadav
2021-04-05 13:17     ` Sean Anderson [this message]

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