spi: spi-mem: Create macros for DTR operation

We do have macros for defining command, address, dummy and data
cycles. We also have a .dtr flag that implies sampling the bus on both
edges, but there are currently no macros enabling it. We might make use
of such macros, so let's create:
- SPI_MEM_DTR_OP_CMD
- SPI_MEM_DTR_OP_ADDR
- SPI_MEM_DTR_OP_DUMMY
- SPI_MEM_DTR_OP_DATA_OUT
- SPI_MEM_DTR_OP_DATA_OUT

Signed-off-by: Miquel Raynal <[email protected]>
Link: https://patch.msgid.link/20241224-winbond-6-11-rc1-quad-support-v2-19-ad218dbc406f@bootlin.com
Signed-off-by: Mark Brown <[email protected]>

Author: miquelraynal

include/linux/spi/spi-mem.h

@@ -20,13 +20,29 @@
 		.opcode = __opcode,				\
 	}
 
+#define SPI_MEM_DTR_OP_CMD(__opcode, __buswidth)		\
+	{							\
+		.nbytes = 1,					\
+		.opcode = __opcode,				\
+		.buswidth = __buswidth,				\
+		.dtr = true,					\
+	}
+
 #define SPI_MEM_OP_ADDR(__nbytes, __val, __buswidth)		\
 	{							\
 		.nbytes = __nbytes,				\
 		.buswidth = __buswidth,				\
 		.val = __val,					\
 	}
 
+#define SPI_MEM_DTR_OP_ADDR(__nbytes, __val, __buswidth)	\
+	{							\
+		.nbytes = __nbytes,				\
+		.val = __val,					\
+		.buswidth = __buswidth,				\
+		.dtr = true,					\
+	}
+
 #define SPI_MEM_OP_NO_ADDR	{ }
 
 #define SPI_MEM_OP_DUMMY(__nbytes, __buswidth)			\
@@ -35,6 +51,13 @@
 		.buswidth = __buswidth,				\
 	}
 
+#define SPI_MEM_DTR_OP_DUMMY(__nbytes, __buswidth)		\
+	{							\
+		.nbytes = __nbytes,				\
+		.buswidth = __buswidth,				\
+		.dtr = true,					\
+	}
+
 #define SPI_MEM_OP_NO_DUMMY	{ }
 
 #define SPI_MEM_OP_DATA_IN(__nbytes, __buf, __buswidth)		\
@@ -45,6 +68,15 @@
 		.buf.in = __buf,				\
 	}
 
+#define SPI_MEM_DTR_OP_DATA_IN(__nbytes, __buf, __buswidth)	\
+	{							\
+		.dir = SPI_MEM_DATA_IN,				\
+		.nbytes = __nbytes,				\
+		.buf.in = __buf,				\
+		.buswidth = __buswidth,				\
+		.dtr = true,					\
+	}
+
 #define SPI_MEM_OP_DATA_OUT(__nbytes, __buf, __buswidth)	\
 	{							\
 		.buswidth = __buswidth,				\
@@ -53,6 +85,15 @@
 		.buf.out = __buf,				\
 	}
 
+#define SPI_MEM_DTR_OP_DATA_OUT(__nbytes, __buf, __buswidth)	\
+	{							\
+		.dir = SPI_MEM_DATA_OUT,			\
+		.nbytes = __nbytes,				\
+		.buf.out = __buf,				\
+		.buswidth = __buswidth,				\
+		.dtr = true,					\
+	}
+
 #define SPI_MEM_OP_NO_DATA	{ }
 
 /**