[PATCH v2 06/13] spi: cadence-qspi: Make sure we filter out unsupported ops
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: 2026-01-15 09:25:46
Also in:
linux-renesas-soc, linux-spi, lkml
Subsystem:
spi subsystem, the rest · Maintainers:
Mark Brown, Linus Torvalds
The Cadence driver does not support anything else than repeating the command opcode twice while in octal DTR mode. Make this clear by checking for this in the ->supports_op() hook. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Pratyush Yadav <pratyush@kernel.org> --- drivers/spi/spi-cadence-quadspi.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 06f6c5979229..fc9f6e8dd549 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c@@ -1531,6 +1531,10 @@ static bool cqspi_supports_mem_op(struct spi_mem *mem, return false; if (op->data.nbytes && op->data.buswidth != 8) return false; + + /* A single opcode is supported, it will be repeated */ + if ((op->cmd.opcode >> 8) != (op->cmd.opcode & 0xFF)) + return false; } else if (!all_false) { /* Mixed DTR modes are not supported. */ return false;
--
2.51.1