| Message ID | 20220218145900.1440045-4-tudor.ambarus@microchip.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | spi-mem: Allow specifying the byte order in DTR mode | expand |
Am 2022-02-18 15:58, schrieb Tudor Ambarus: > Parse BFPT in order to retrieve the byte order in 8D-8D-8D mode. > > Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> > --- > drivers/mtd/spi-nor/sfdp.c | 3 +++ > drivers/mtd/spi-nor/sfdp.h | 1 + > 2 files changed, 4 insertions(+) > > diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c > index a5211543d30d..551edbb039f0 100644 > --- a/drivers/mtd/spi-nor/sfdp.c > +++ b/drivers/mtd/spi-nor/sfdp.c > @@ -633,6 +633,9 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, > return -EOPNOTSUPP; > } > > + if (bfpt.dwords[BFPT_DWORD(18)] & BFPT_DWORD18_BYTE_ORDER_SWAPPED) > + nor->flags |= SNOR_F_DTR_BSWAP16; > + > return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt); > } > > diff --git a/drivers/mtd/spi-nor/sfdp.h b/drivers/mtd/spi-nor/sfdp.h > index bbf80d2990ab..9a834ea31c16 100644 > --- a/drivers/mtd/spi-nor/sfdp.h > +++ b/drivers/mtd/spi-nor/sfdp.h > @@ -97,6 +97,7 @@ struct sfdp_bfpt { > #define BFPT_DWORD18_CMD_EXT_INV (0x1UL << 29) /* Invert */ > #define BFPT_DWORD18_CMD_EXT_RES (0x2UL << 29) /* Reserved */ > #define BFPT_DWORD18_CMD_EXT_16B (0x3UL << 29) /* 16-bit opcode */ > +#define BFPT_DWORD18_BYTE_ORDER_SWAPPED BIT(31) > > struct sfdp_parameter_header { > u8 id_lsb; Reviewed-by: Michael Walle <michael@walle.cc> -michael
On 18/02/22 04:58PM, Tudor Ambarus wrote: > Parse BFPT in order to retrieve the byte order in 8D-8D-8D mode. > > Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Reviewed-by: Pratyush Yadav <p.yadav@ti.com> > --- > drivers/mtd/spi-nor/sfdp.c | 3 +++ > drivers/mtd/spi-nor/sfdp.h | 1 + > 2 files changed, 4 insertions(+) > > diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c > index a5211543d30d..551edbb039f0 100644 > --- a/drivers/mtd/spi-nor/sfdp.c > +++ b/drivers/mtd/spi-nor/sfdp.c > @@ -633,6 +633,9 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, > return -EOPNOTSUPP; > } > > + if (bfpt.dwords[BFPT_DWORD(18)] & BFPT_DWORD18_BYTE_ORDER_SWAPPED) > + nor->flags |= SNOR_F_DTR_BSWAP16; > + > return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt); > } > > diff --git a/drivers/mtd/spi-nor/sfdp.h b/drivers/mtd/spi-nor/sfdp.h > index bbf80d2990ab..9a834ea31c16 100644 > --- a/drivers/mtd/spi-nor/sfdp.h > +++ b/drivers/mtd/spi-nor/sfdp.h > @@ -97,6 +97,7 @@ struct sfdp_bfpt { > #define BFPT_DWORD18_CMD_EXT_INV (0x1UL << 29) /* Invert */ > #define BFPT_DWORD18_CMD_EXT_RES (0x2UL << 29) /* Reserved */ > #define BFPT_DWORD18_CMD_EXT_16B (0x3UL << 29) /* 16-bit opcode */ > +#define BFPT_DWORD18_BYTE_ORDER_SWAPPED BIT(31) > > struct sfdp_parameter_header { > u8 id_lsb; > -- > 2.25.1 >
diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c index a5211543d30d..551edbb039f0 100644 --- a/drivers/mtd/spi-nor/sfdp.c +++ b/drivers/mtd/spi-nor/sfdp.c @@ -633,6 +633,9 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, return -EOPNOTSUPP; } + if (bfpt.dwords[BFPT_DWORD(18)] & BFPT_DWORD18_BYTE_ORDER_SWAPPED) + nor->flags |= SNOR_F_DTR_BSWAP16; + return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt); } diff --git a/drivers/mtd/spi-nor/sfdp.h b/drivers/mtd/spi-nor/sfdp.h index bbf80d2990ab..9a834ea31c16 100644 --- a/drivers/mtd/spi-nor/sfdp.h +++ b/drivers/mtd/spi-nor/sfdp.h @@ -97,6 +97,7 @@ struct sfdp_bfpt { #define BFPT_DWORD18_CMD_EXT_INV (0x1UL << 29) /* Invert */ #define BFPT_DWORD18_CMD_EXT_RES (0x2UL << 29) /* Reserved */ #define BFPT_DWORD18_CMD_EXT_16B (0x3UL << 29) /* 16-bit opcode */ +#define BFPT_DWORD18_BYTE_ORDER_SWAPPED BIT(31) struct sfdp_parameter_header { u8 id_lsb;
Parse BFPT in order to retrieve the byte order in 8D-8D-8D mode. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> --- drivers/mtd/spi-nor/sfdp.c | 3 +++ drivers/mtd/spi-nor/sfdp.h | 1 + 2 files changed, 4 insertions(+)