[PATCH v6 03/19] spi: spi-mtk-nor: reject DTR ops

Pratyush Yadav
2020-05-20T16:32:02Z

Double Transfer Rate (DTR) ops are added in spi-mem. But this controller
doesn't support DTR transactions. Since we don't use the default
supports_op(), which rejects all DTR ops, do that explicitly in our
supports_op().

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
---
drivers/spi/spi-mtk-nor.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/spi/spi-mtk-nor.c b/drivers/spi/spi-mtk-nor.c
index 7bc302b50396..7015dccedf00 100644
--- a/drivers/spi/spi-mtk-nor.c
+++ b/drivers/spi/spi-mtk-nor.c
@@ -211,6 +211,10 @@ static bool mtk_nor_supports_op(struct spi_mem *mem,
if (op->cmd.buswidth != 1)
return false;

+ /* DTR ops not supported. */
+ if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr)
+ return false;
+
if ((op->addr.nbytes == 3) || (op->addr.nbytes == 4)) {
if ((op->data.dir == SPI_MEM_DATA_IN) && mtk_nor_match_read(op))
return true;
--
2.26.2