[PATCH v10 05/13] spi: spi-mem: Kill the spi_mem_dtr_supports_op() helper

[Miquel Raynal <miquel.raynal@xxxxxxxxxxx>]

Now that spi_mem_default_supports_op() has access to the static
controller capabilities (relating to memory operations), and now that
these capabilities have been filled by the relevant controllers, there
is no need for a specific helper checking only DTR operations, so let's
just kill spi_mem_dtr_supports_op() and simply use
spi_mem_default_supports_op() instead.

Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Reviewed-by: Pratyush Yadav <p.yadav@xxxxxx>
Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/20220104083631.40776-6-miquel.raynal@xxxxxxxxxxx
---
 drivers/spi/spi-cadence-quadspi.c |  5 +----
 drivers/spi/spi-mem.c             | 10 ----------
 drivers/spi/spi-mxic.c            | 10 +---------
 include/linux/spi/spi-mem.h       | 11 -----------
 4 files changed, 2 insertions(+), 34 deletions(-)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 455b90d1feed..b0c9f62ccefb 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1441,10 +1441,7 @@ static bool cqspi_supports_mem_op(struct spi_mem *mem,
 	if (!(all_true || all_false))
 		return false;
 
-	if (all_true)
-		return spi_mem_dtr_supports_op(mem, op);
-	else
-		return spi_mem_default_supports_op(mem, op);
+	return spi_mem_default_supports_op(mem, op);
 }
 
 static int cqspi_of_get_flash_pdata(struct platform_device *pdev,
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index 86e6597bc3dc..ed966d8129eb 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -160,16 +160,6 @@ static bool spi_mem_check_buswidth(struct spi_mem *mem,
 	return true;
 }
 
-bool spi_mem_dtr_supports_op(struct spi_mem *mem,
-			     const struct spi_mem_op *op)
-{
-	if (op->cmd.nbytes != 2)
-		return false;
-
-	return spi_mem_check_buswidth(mem, op);
-}
-EXPORT_SYMBOL_GPL(spi_mem_dtr_supports_op);
-
 bool spi_mem_default_supports_op(struct spi_mem *mem,
 				 const struct spi_mem_op *op)
 {
diff --git a/drivers/spi/spi-mxic.c b/drivers/spi/spi-mxic.c
index 9952fcdf3627..6bec0a7c77d3 100644
--- a/drivers/spi/spi-mxic.c
+++ b/drivers/spi/spi-mxic.c
@@ -335,8 +335,6 @@ static int mxic_spi_data_xfer(struct mxic_spi *mxic, const void *txbuf,
 static bool mxic_spi_mem_supports_op(struct spi_mem *mem,
 				     const struct spi_mem_op *op)
 {
-	bool all_false;
-
 	if (op->data.buswidth > 8 || op->addr.buswidth > 8 ||
 	    op->dummy.buswidth > 8 || op->cmd.buswidth > 8)
 		return false;
@@ -348,13 +346,7 @@ static bool mxic_spi_mem_supports_op(struct spi_mem *mem,
 	if (op->addr.nbytes > 7)
 		return false;
 
-	all_false = !op->cmd.dtr && !op->addr.dtr && !op->dummy.dtr &&
-		    !op->data.dtr;
-
-	if (all_false)
-		return spi_mem_default_supports_op(mem, op);
-	else
-		return spi_mem_dtr_supports_op(mem, op);
+	return spi_mem_default_supports_op(mem, op);
 }
 
 static int mxic_spi_mem_exec_op(struct spi_mem *mem,
diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h
index 38e5d45c9842..4a1bfe689872 100644
--- a/include/linux/spi/spi-mem.h
+++ b/include/linux/spi/spi-mem.h
@@ -330,10 +330,6 @@ void spi_controller_dma_unmap_mem_op_data(struct spi_controller *ctlr,
 
 bool spi_mem_default_supports_op(struct spi_mem *mem,
 				 const struct spi_mem_op *op);
-
-bool spi_mem_dtr_supports_op(struct spi_mem *mem,
-			     const struct spi_mem_op *op);
-
 #else
 static inline int
 spi_controller_dma_map_mem_op_data(struct spi_controller *ctlr,
@@ -356,13 +352,6 @@ bool spi_mem_default_supports_op(struct spi_mem *mem,
 {
 	return false;
 }
-
-static inline
-bool spi_mem_dtr_supports_op(struct spi_mem *mem,
-			     const struct spi_mem_op *op)
-{
-	return false;
-}
 #endif /* CONFIG_SPI_MEM */
 
 int spi_mem_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op);
-- 
2.27.0