diff mbox series

[13/15] mtd: spi-nor-core: Use Read SR dummy cycle and address width from SFDP

Message ID 20200226125606.22684-14-p.yadav@ti.com
State Superseded
Delegated to: Jagannadha Sutradharudu Teki
Headers show
Series mtd: spi-nor-core: add xSPI Octal DTR support | expand

Commit Message

Pratyush Yadav Feb. 26, 2020, 12:56 p.m. UTC 
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>
---
 drivers/mtd/spi/spi-nor-core.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c
index 0d3ab44a41..6802fb625b 100644
--- a/drivers/mtd/spi/spi-nor-core.c
+++ b/drivers/mtd/spi/spi-nor-core.c
@@ -340,8 +340,16 @@  static int read_sr(struct spi_nor *nor)
 {
 	int ret;
 	u8 val;
+	u8 addr_nbytes = nor->rdsr_addr_nbytes;
+	u8 dummy = nor->rdsr_dummy;
+	struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_RDSR, 1),
+					  SPI_MEM_OP_ADDR(addr_nbytes, 0, 1),
+					  SPI_MEM_OP_DUMMY(dummy, 1),
+					  SPI_MEM_OP_DATA_IN(1, NULL, 1));
 
-	ret = nor->read_reg(nor, SPINOR_OP_RDSR, &val, 1);
+	spi_nor_setup_op(nor, &op, nor->reg_proto);
+
+	ret = spi_nor_read_write_reg(nor, &op, &val);
 	if (ret < 0) {
 		pr_debug("error %d reading SR\n", (int)ret);
 		return ret;