[PATCH v4 05/12] spi: spi-mem: Export the spi_mem_generic_supports_op() helper

[Miquel Raynal]

The combination of checks against the number of supported operations is
going to increase exponentially each time we add a new parameter. So far
we only had a dtr parameter. Now we are introducing an ECC parameter. We
need to make this helper available for drivers with specific needs,
instead of creating another set of helpers each time we want to check
something new. In the future if we see that many different drivers use
the same parameter values, we might be tempted to create a specific
helper for that. But for now, let's just make the generic one available.

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
 drivers/spi/spi-mem.c       |  7 ++++---
 include/linux/spi/spi-mem.h | 13 +++++++++++++
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index 9e06cd918273..48b55395178f 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -160,9 +160,9 @@ static bool spi_mem_check_buswidth(struct spi_mem *mem,
 	return true;
 }
 
-static bool spi_mem_generic_supports_op(struct spi_mem *mem,
-					const struct spi_mem_op *op,
-					bool dtr, bool ecc)
+bool spi_mem_generic_supports_op(struct spi_mem *mem,
+				 const struct spi_mem_op *op,
+				 bool dtr, bool ecc)
 {
 	if (!dtr) {
 		if (op->cmd.dtr || op->addr.dtr ||
@@ -183,6 +183,7 @@ static bool spi_mem_generic_supports_op(struct spi_mem *mem,
 
 	return spi_mem_check_buswidth(mem, op);
 }
+EXPORT_SYMBOL_GPL(spi_mem_generic_supports_op);
 
 bool spi_mem_dtr_supports_op(struct spi_mem *mem,
 			     const struct spi_mem_op *op)
diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h
index 3be594be24c0..07f637cbe77d 100644
--- a/include/linux/spi/spi-mem.h
+++ b/include/linux/spi/spi-mem.h
@@ -320,6 +320,10 @@ void spi_controller_dma_unmap_mem_op_data(struct spi_controller *ctlr,
 					  const struct spi_mem_op *op,
 					  struct sg_table *sg);
 
+bool spi_mem_generic_supports_op(struct spi_mem *mem,
+				 const struct spi_mem_op *op,
+				 bool dtr, bool ecc);
+
 bool spi_mem_default_supports_op(struct spi_mem *mem,
 				 const struct spi_mem_op *op);
 
@@ -327,6 +331,7 @@ 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,
 				   const struct spi_mem_op *op,
@@ -342,6 +347,14 @@ spi_controller_dma_unmap_mem_op_data(struct spi_controller *ctlr,
 {
 }
 
+static inline
+bool spi_mem_generic_supports_op(struct spi_mem *mem,
+				 const struct spi_mem_op *op,
+				 bool dtr, bool ecc)
+{
+	return false;
+}
+
 static inline
 bool spi_mem_default_supports_op(struct spi_mem *mem,
 				 const struct spi_mem_op *op)
-- 
2.27.0