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

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>

diff --git a/drivers/mtd/spi/Kconfig b/drivers/mtd/spi/Kconfig
index f83876c..096338f 100644 (file)
--- a/drivers/mtd/spi/Kconfig
+++ b/drivers/mtd/spi/Kconfig
@@ -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

diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c
index 5d319e4..50460fe 100644 (file)
--- a/drivers/mtd/spi/spi-nor-core.c
+++ b/drivers/mtd/spi/spi-nor-core.c
@@ -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,