linux-kernel - [PATCH v3 01/17] spi: spi-mem: Add DTR templates for cmd, address, dummy and data phase

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Date:   Sat, 1 Jan 2022 13:12:34 +0530
From:   Apurva Nandan <a-nandan@...com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Mark Brown <broonie@...nel.org>,
        Apurva Nandan <a-nandan@...com>,
        Patrice Chotard <patrice.chotard@...s.st.com>,
        Christophe Kerello <christophe.kerello@...s.st.com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Daniel Palmer <daniel@...f.com>,
        Alexander Lobakin <alobakin@...me>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-spi@...r.kernel.org>
CC:     <p.yadav@...com>
Subject: [PATCH v3 01/17] spi: spi-mem: Add DTR templates for cmd, address, dummy and data phase

Setting dtr field of spi_mem_op is useful when creating templates
for DTR ops in spinand.h. Also, 2 bytes cmd phases are required when
operating in Octal DTR SPI mode.

Create new templates for dtr mode cmd, address, dummy and data phase
in spi_mem_op, which set the dtr field to 1 and also allow passing
the nbytes for the cmd phase.

Signed-off-by: Apurva Nandan <a-nandan@...com>
---
 include/linux/spi/spi-mem.h | 41 +++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h
index 85e2ff7b840d..682378a9c600 100644
--- a/include/linux/spi/spi-mem.h
+++ b/include/linux/spi/spi-mem.h
@@ -20,6 +20,14 @@
 		.nbytes = 1,					\
 	}
 
+#define SPI_MEM_OP_CMD_DTR(__nbytes, __opcode, __buswidth)	\
+	{							\
+		.nbytes = __nbytes,				\
+		.opcode = __opcode,				\
+		.buswidth = __buswidth,				\
+		.dtr = 1,					\
+	}
+
 #define SPI_MEM_OP_ADDR(__nbytes, __val, __buswidth)		\
 	{							\
 		.nbytes = __nbytes,				\
@@ -27,6 +35,14 @@
 		.buswidth = __buswidth,				\
 	}
 
+#define SPI_MEM_OP_ADDR_DTR(__nbytes, __val, __buswidth)	\
+	{							\
+		.nbytes = __nbytes,				\
+		.val = __val,					\
+		.buswidth = __buswidth,				\
+		.dtr = 1,					\
+	}
+
 #define SPI_MEM_OP_NO_ADDR	{ }
 
 #define SPI_MEM_OP_DUMMY(__nbytes, __buswidth)			\
@@ -35,6 +51,13 @@
 		.buswidth = __buswidth,				\
 	}
 
+#define SPI_MEM_OP_DUMMY_DTR(__nbytes, __buswidth)		\
+	{							\
+		.nbytes = __nbytes,				\
+		.buswidth = __buswidth,				\
+		.dtr = 1,					\
+	}
+
 #define SPI_MEM_OP_NO_DUMMY	{ }
 
 #define SPI_MEM_OP_DATA_IN(__nbytes, __buf, __buswidth)		\
@@ -45,6 +68,15 @@
 		.buswidth = __buswidth,				\
 	}
 
+#define SPI_MEM_OP_DATA_IN_DTR(__nbytes, __buf, __buswidth)	\
+	{							\
+		.dir = SPI_MEM_DATA_IN,				\
+		.nbytes = __nbytes,				\
+		.buf.in = __buf,				\
+		.buswidth = __buswidth,				\
+		.dtr = 1,					\
+	}
+
 #define SPI_MEM_OP_DATA_OUT(__nbytes, __buf, __buswidth)	\
 	{							\
 		.dir = SPI_MEM_DATA_OUT,			\
@@ -53,6 +85,15 @@
 		.buswidth = __buswidth,				\
 	}
 
+#define SPI_MEM_OP_DATA_OUT_DTR(__nbytes, __buf, __buswidth)	\
+	{							\
+		.dir = SPI_MEM_DATA_OUT,			\
+		.nbytes = __nbytes,				\
+		.buf.out = __buf,				\
+		.buswidth = __buswidth,				\
+		.dtr = 1,					\
+	}
+
 #define SPI_MEM_OP_NO_DATA	{ }
 
 /**
-- 
2.25.1