From: Pratyush Yadav Date: Mon, 5 Oct 2020 15:31:29 +0000 (+0530) Subject: mtd: spi-nor: core: use dummy cycle and address width info from SFDP X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6c6a2b2b8ed6dd1ad1a318afd1035777a73936e0;p=linux.git mtd: spi-nor: core: use dummy cycle and address width info from SFDP 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 Signed-off-by: Vignesh Raghavendra Reviewed-by: Tudor Ambarus Link: https://lore.kernel.org/r/20201005153138.6437-7-p.yadav@ti.com --- diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index fea6198028251..d63dfd7d4b31f 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -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);