Commit 6c6a2b2b authored by Pratyush Yadav's avatar Pratyush Yadav Committed by Vignesh Raghavendra
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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: default avatarPratyush Yadav <p.yadav@ti.com>
Signed-off-by: default avatarVignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: default avatarTudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20201005153138.6437-7-p.yadav@ti.com
parent fb27f198

drivers/mtd/spi-nor/core.c

+10 −0
Original line number Diff line number Diff line
@@ -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);