[PATCH v4 07/11] mtd: spi-nor: spansion: add octal DTR support in RD_ANY_REG_OP

From: Tudor Ambarus
Date: Wed Jul 26 2023 - 04:02:22 EST


From: Takahiro Kuwano <Takahiro.Kuwano@xxxxxxxxxxxx>

S28HS02GT uses RD_ANY_REG_OP to read status of each die. In Octal DTR
mode, RD_ANY_REG_OP needs dummy cycles (same as params->rdsr_dummy) and
data length should be 2.

Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano@xxxxxxxxxxxx>
---
drivers/mtd/spi-nor/spansion.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c
index b3a710985f84..d7aa0a90949a 100644
--- a/drivers/mtd/spi-nor/spansion.c
+++ b/drivers/mtd/spi-nor/spansion.c
@@ -102,11 +102,17 @@ static void spansion_nor_clear_sr(struct spi_nor *nor)

static int cypress_nor_sr_ready_and_clear_reg(struct spi_nor *nor, u64 addr)
{
+ struct spi_nor_flash_parameter *params = nor->params;
struct spi_mem_op op =
- CYPRESS_NOR_RD_ANY_REG_OP(nor->params->addr_mode_nbytes, addr,
+ CYPRESS_NOR_RD_ANY_REG_OP(params->addr_mode_nbytes, addr,
0, nor->bouncebuf);
int ret;

+ if (nor->reg_proto == SNOR_PROTO_8_8_8_DTR) {
+ op.dummy.nbytes = params->rdsr_dummy;
+ op.data.nbytes = 2;
+ }
+
ret = spi_nor_read_any_reg(nor, &op, nor->reg_proto);
if (ret)
return ret;
--
2.34.1