Messages in this thread | | | Date | Fri, 02 Dec 2022 16:20:47 +0100 | From | Michael Walle <> | Subject | Re: [PATCH v4 3/3] mtd: spi-nor: Add support for IS25LX256 operating in 1S-8S-8S octal read mode |
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Am 2022-12-02 14:55, schrieb Nathan Barrett-Morrison: > This adds the IS25LX256 chip into the ISSI flash_info parts table > > Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com> > --- > drivers/mtd/spi-nor/issi.c | 32 ++++++++++++++++++++++++++++++++ > 1 file changed, 32 insertions(+) > > diff --git a/drivers/mtd/spi-nor/issi.c b/drivers/mtd/spi-nor/issi.c > index 89a66a19d754..362bc3603d8f 100644 > --- a/drivers/mtd/spi-nor/issi.c > +++ b/drivers/mtd/spi-nor/issi.c > @@ -29,6 +29,35 @@ static const struct spi_nor_fixups is25lp256_fixups > = { > .post_bfpt = is25lp256_post_bfpt_fixups, > }; > > +static int > +is25lx256_post_bfpt_fixups(struct spi_nor *nor, > + const struct sfdp_parameter_header *bfpt_header, > + const struct sfdp_bfpt *bfpt) > +{ > + /* > + * IS25LX256 supports both 1S-1S-8S and 1S-8S-8S. > + * However, the BFPT does not contain any information denoting this > + * functionality, so the proper fast read opcodes are never setup. > + * We're correcting this issue via the fixup below. Page program > + * commands are detected and setup properly via the 4BAIT lookup. > + */ > + params->hwcaps.mask |= SNOR_HWCAPS_READ_1_1_8; > + spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_1_1_8], > + 0, 8, SPINOR_OP_READ_1_1_8, > + SNOR_PROTO_1_1_8); > + > + params->hwcaps.mask |= SNOR_HWCAPS_READ_1_8_8; > + spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_1_8_8], > + 0, 16, SPINOR_OP_READ_1_8_8, > + SNOR_PROTO_1_8_8); > + > + return 0; > +} > + > +static const struct spi_nor_fixups is25lx256_fixups = { > + .post_bfpt = is25lx256_post_bfpt_fixups, > +}; > + > static void pm25lv_nor_late_init(struct spi_nor *nor) > { > struct spi_nor_erase_map *map = &nor->params->erase_map; > @@ -74,6 +103,9 @@ static const struct flash_info issi_nor_parts[] = { > NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) > FIXUP_FLAGS(SPI_NOR_4B_OPCODES) > .fixups = &is25lp256_fixups }, > + { "is25lx256", INFO(0x9d5a19, 0, 0, 0) > + PARSE_SFDP > + .fixups = &is25lx256_fixups },
Very nice!
Subject is slightly wrong because you fix up the BFPT to get correct 1-1-8 and 1-8-8 read modes.
With that fixed: Reviewed-by: Michael Walle <michael@walle.cc>
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