Add support for Renesas AT25QL128A serial nor flash. Details of flash chip can be found here [1] [1] https://www.dialog-semiconductor.com/sites/default/files/2022-04/DS-AT25QL128A-129F-022022.pdf Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> --- $ xxd -p sfdp 53464450060101ff00060110300000ff1f00010280000001ffffffffffff ffffffffffffffffffffffffffffffffffffe520f1ffffffff0744eb086b 083b80bbfeffffffffff00ffffff42eb0c200f5210d800ff3362d5008429 01ceeca1073d7a757a75f7a2d55c19f61cffe810c080ffffffffffffffff ffffffffffffffff501650190000ffff :~# md5sum /sys/devices/platform/soc/10060000.spi/rpc-if-spi/spi_master/spi1/spi1.0/spi-nor/sfdp 23e3ec56b5b8f986d0488ba4727239dd ~# cat /sys/devices/platform/soc/10060000.spi/rpc-if-spi/spi_master/spi1/spi1.0/spi-nor/jedec_id 1f4218 ~# cat /sys/devices/platform/soc/10060000.spi/rpc-if-spi/spi_master/spi1/spi1.0/spi-nor/partname at25ql128a ~# cat /sys/devices/platform/soc/10060000.spi/rpc-if-spi/spi_master/spi1/spi1.0/spi-nor/manufacturer renesas RFC->v1: * Moved the flash definitions to atmel.c * Remove macro related to locking as it is untested. * Replaced INFO macro with SNOR_ID3 RFC: * https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220501185512.51158-1-biju.das.jz@xxxxxxxxxxxxxx/ --- drivers/mtd/spi-nor/atmel.c | 55 +++++++++++++++++++++++++++++++++++++ drivers/mtd/spi-nor/core.c | 1 + drivers/mtd/spi-nor/core.h | 1 + 3 files changed, 57 insertions(+) diff --git a/drivers/mtd/spi-nor/atmel.c b/drivers/mtd/spi-nor/atmel.c index 656dd80a0be7..61cff6de7db2 100644 --- a/drivers/mtd/spi-nor/atmel.c +++ b/drivers/mtd/spi-nor/atmel.c @@ -10,6 +10,15 @@ #define ATMEL_SR_GLOBAL_PROTECT_MASK GENMASK(5, 2) +#define SNOR_ID3(_jedec_id) \ + .id = { \ + ((_jedec_id) >> 16) & 0xff, \ + ((_jedec_id) >> 8) & 0xff, \ + (_jedec_id) & 0xff, \ + }, \ + .id_len = 3, \ + .parse_sfdp = true + /* * The Atmel AT25FS010/AT25FS040 parts have some weird configuration for the * block protection bits. We don't support them. But legacy behavior in linux @@ -204,6 +213,52 @@ static const struct flash_info atmel_nor_parts[] = { NO_SFDP_FLAGS(SECT_4K) }, }; +static const struct flash_info renesas_nor_parts[] = { + { "at25ql128a", SNOR_ID3(0x1f4218) }, +}; + +/** + * renesas_nor_set_4byte_addr_mode() - Set 4-byte address mode for Renesas + * flashes. + * @nor: pointer to 'struct spi_nor'. + * @enable: true to enter the 4-byte address mode, false to exit the 4-byte + * address mode. + * + * Return: 0 on success, -errno otherwise. + */ +static int renesas_nor_set_4byte_addr_mode(struct spi_nor *nor, bool enable) +{ + int ret; + + ret = spi_nor_write_enable(nor); + if (ret) + return ret; + + ret = spi_nor_set_4byte_addr_mode(nor, enable); + if (ret) + return ret; + + return spi_nor_write_disable(nor); +} + +static void renesas_nor_default_init(struct spi_nor *nor) +{ + nor->flags &= ~SNOR_F_HAS_16BIT_SR; + nor->params->quad_enable = NULL; + nor->params->set_4byte_addr_mode = renesas_nor_set_4byte_addr_mode; +} + +static const struct spi_nor_fixups renesas_nor_fixups = { + .default_init = renesas_nor_default_init, +}; + +const struct spi_nor_manufacturer spi_nor_renesas = { + .name = "renesas", + .parts = renesas_nor_parts, + .nparts = ARRAY_SIZE(renesas_nor_parts), + .fixups = &renesas_nor_fixups, +}; + const struct spi_nor_manufacturer spi_nor_atmel = { .name = "atmel", .parts = atmel_nor_parts, diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index b4f141ad9c9c..ba9f222da00b 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -1621,6 +1621,7 @@ static const struct spi_nor_manufacturer *manufacturers[] = { &spi_nor_issi, &spi_nor_macronix, &spi_nor_micron, + &spi_nor_renesas, &spi_nor_st, &spi_nor_spansion, &spi_nor_sst, diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h index b7fd760e3b47..3d2e39329079 100644 --- a/drivers/mtd/spi-nor/core.h +++ b/drivers/mtd/spi-nor/core.h @@ -511,6 +511,7 @@ extern const struct spi_nor_manufacturer spi_nor_intel; extern const struct spi_nor_manufacturer spi_nor_issi; extern const struct spi_nor_manufacturer spi_nor_macronix; extern const struct spi_nor_manufacturer spi_nor_micron; +extern const struct spi_nor_manufacturer spi_nor_renesas; extern const struct spi_nor_manufacturer spi_nor_st; extern const struct spi_nor_manufacturer spi_nor_spansion; extern const struct spi_nor_manufacturer spi_nor_sst; -- 2.25.1
