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mtd: spi-nor: core: use dummy cycle and address width info from SFDP

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The xSPI Profile 1.0 table specifies how many dummy cycles and address
bytes are needed for the Read Status Register command in octal DTR mode.
Use that information to send the correct Read SR command.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20201005153138.6437-7-p.yadav@ti.com
This commit is contained in:
Pratyush Yadav 2020-10-05 21:01:29 +05:30 committed by Vignesh Raghavendra
parent fb27f19897
commit 6c6a2b2b8e
1 changed files with 10 additions and 0 deletions
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10
drivers/mtd/spi-nor/core.c
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@ -385,6 +385,11 @@ static int spi_nor_read_sr(struct spi_nor *nor, u8 *sr)
SPI_MEM_OP_NO_DUMMY,
SPI_MEM_OP_DATA_IN(1, sr, 0));
if (nor->reg_proto == SNOR_PROTO_8_8_8_DTR) {
op.addr.nbytes = nor->params->rdsr_addr_nbytes;
op.dummy.nbytes = nor->params->rdsr_dummy;
}
spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
ret = spi_mem_exec_op(nor->spimem, &op);
@ -418,6 +423,11 @@ static int spi_nor_read_fsr(struct spi_nor *nor, u8 *fsr)
SPI_MEM_OP_NO_DUMMY,
SPI_MEM_OP_DATA_IN(1, fsr, 0));
if (nor->reg_proto == SNOR_PROTO_8_8_8_DTR) {
op.addr.nbytes = nor->params->rdsr_addr_nbytes;
op.dummy.nbytes = nor->params->rdsr_dummy;
}
spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
ret = spi_mem_exec_op(nor->spimem, &op);