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mtd: spi-nor-core: Adding different type of command extension in Soft Reset

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Power-on-Reset is a method to restore flash back to 1S-1S-1S mode from 8D-8D-8D
in the begging of probe.

Command extension type is not standardized across flash vendors in DTR mode.

For suiting different vendor flash devices, adding a flag to seperate types for
soft reset on boot.

Signed-off-by: JaimeLiao <jaimeliao.tw@gmail.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
JaimeLiao 2022-07-04 14:12:40 +08:00 committed by Jagan Teki
parent df3d5f9e41
commit 68ad73b70c
2 changed files with 13 additions and 1 deletions
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7
drivers/mtd/spi/Kconfig
View file

@ -97,6 +97,13 @@ config SPI_FLASH_SMART_HWCAPS
can support a type of operation in a much more refined way compared
to using flags like SPI_RX_DUAL, SPI_TX_QUAD, etc.
config SPI_NOR_BOOT_SOFT_RESET_EXT_INVERT
bool "Command extension type is INVERT for Software Reset on boot"
default n
help
Because of SFDP information can not be get before boot.
So define command extension type is INVERT when Software Reset on boot only.
config SPI_FLASH_SOFT_RESET
bool "Software Reset support for SPI NOR flashes"
help

7
drivers/mtd/spi/spi-nor-core.c
View file

@ -3697,7 +3697,12 @@ static int spi_nor_soft_reset(struct spi_nor *nor)
enum spi_nor_cmd_ext ext;
ext = nor->cmd_ext_type;
nor->cmd_ext_type = SPI_NOR_EXT_REPEAT;
if (nor->cmd_ext_type == SPI_NOR_EXT_NONE) {
nor->cmd_ext_type = SPI_NOR_EXT_REPEAT;
#if CONFIG_IS_ENABLED(SPI_NOR_BOOT_SOFT_RESET_EXT_INVERT)
nor->cmd_ext_type = SPI_NOR_EXT_INVERT;
#endif /* SPI_NOR_BOOT_SOFT_RESET_EXT_INVERT */
}
op = (struct spi_mem_op)SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_SRSTEN, 0),
SPI_MEM_OP_NO_DUMMY,