[PATCH v6 21/21] mtd: spi-nor-core: Allow using Micron mt35xu512aba in Octal DTR mode
jagan at amarulasolutions.com
Wed Jul 8 13:56:42 CEST 2020
On Fri, Jun 5, 2020 at 6:16 PM Pratyush Yadav <p.yadav at ti.com> wrote:
> Since this flash doesn't have a Profile 1.0 table, the Octal DTR
> capabilities are enabled in the post SFDP fixup, along with the 8D-8D-8D
> fast read settings.
> Enable Octal DTR mode with 20 dummy cycles to allow running at the
> maximum supported frequency of 200Mhz.
> The flash supports the soft reset sequence. So, add the flag in the
> flash's info.
> Signed-off-by: Pratyush Yadav <p.yadav at ti.com>
> drivers/mtd/spi/Kconfig | 8 ++++
> drivers/mtd/spi/spi-nor-core.c | 87 ++++++++++++++++++++++++++++++++++
> drivers/mtd/spi/spi-nor-ids.c | 4 +-
> include/linux/mtd/spi-nor.h | 10 +++-
> 4 files changed, 106 insertions(+), 3 deletions(-)
> diff --git a/drivers/mtd/spi/Kconfig b/drivers/mtd/spi/Kconfig
> index ecfed6d215..9c549b39b7 100644
> --- a/drivers/mtd/spi/Kconfig
> +++ b/drivers/mtd/spi/Kconfig
> @@ -170,6 +170,14 @@ config SPI_FLASH_STMICRO
> Add support for various STMicro SPI flash chips (M25Pxxx and N25Qxxx)
> +config SPI_FLASH_MT35XU
> + bool "Micron MT35XU chip support"
> + depends on SPI_FLASH_STMICRO
> + help
> + Add support for the Micron MT35XU chip. This is a separate config
> + because the fixup hooks for this flash add extra size overhead. Boards
> + that don't use the flash can disable this to save space.
This one and 20/21 are introducing the Kconfig options for single type
flashes in the micron family, does other effect size issues if dtr
make it available for STMICRO chips? if so, having a flash option of
dtr would much better and I hope Linux does it similarly.
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