mtd: spi-nor: add spi_nor_controller_ops_{read_reg, write_reg, erase}()

They are thin wrappers around
nor->controller_ops->{read_reg,write_reg,erase}(). In a future commit
DTR support will be added. These ops can not be supported by the
controller_ops hooks and these helpers will make it easier to reject
those calls.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20201005153138.6437-3-p.yadav@ti.com

1 files changed, 53 insertions, 34 deletions

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index c164bb947f74..2f24bde08c90 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -82,6 +82,23 @@ static int spi_nor_spimem_exec_op(struct spi_nor *nor, struct spi_mem_op *op)
 	return spi_mem_exec_op(nor->spimem, op);
 }
 
+static int spi_nor_controller_ops_read_reg(struct spi_nor *nor, u8 opcode,
+					   u8 *buf, size_t len)
+{
+	return nor->controller_ops->read_reg(nor, opcode, buf, len);
+}
+
+static int spi_nor_controller_ops_write_reg(struct spi_nor *nor, u8 opcode,
+					    const u8 *buf, size_t len)
+{
+	return nor->controller_ops->write_reg(nor, opcode, buf, len);
+}
+
+static int spi_nor_controller_ops_erase(struct spi_nor *nor, loff_t offs)
+{
+	return nor->controller_ops->erase(nor, offs);
+}
+
 /**
  * spi_nor_spimem_read_data() - read data from flash's memory region via
  *                              spi-mem
@@ -229,8 +246,8 @@ int spi_nor_write_enable(struct spi_nor *nor)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_WREN,
-						     NULL, 0);
+		ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_WREN,
+						       NULL, 0);
 	}
 
 	if (ret)
@@ -258,8 +275,8 @@ int spi_nor_write_disable(struct spi_nor *nor)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_WRDI,
-						     NULL, 0);
+		ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_WRDI,
+						       NULL, 0);
 	}
 
 	if (ret)
@@ -289,8 +306,8 @@ static int spi_nor_read_sr(struct spi_nor *nor, u8 *sr)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->read_reg(nor, SPINOR_OP_RDSR,
-						    sr, 1);
+		ret = spi_nor_controller_ops_read_reg(nor, SPINOR_OP_RDSR, sr,
+						      1);
 	}
 
 	if (ret)
@@ -320,8 +337,8 @@ static int spi_nor_read_fsr(struct spi_nor *nor, u8 *fsr)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->read_reg(nor, SPINOR_OP_RDFSR,
-						    fsr, 1);
+		ret = spi_nor_controller_ops_read_reg(nor, SPINOR_OP_RDFSR, fsr,
+						      1);
 	}
 
 	if (ret)
@@ -352,7 +369,8 @@ static int spi_nor_read_cr(struct spi_nor *nor, u8 *cr)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->read_reg(nor, SPINOR_OP_RDCR, cr, 1);
+		ret = spi_nor_controller_ops_read_reg(nor, SPINOR_OP_RDCR, cr,
+						      1);
 	}
 
 	if (ret)
@@ -385,10 +403,10 @@ int spi_nor_set_4byte_addr_mode(struct spi_nor *nor, bool enable)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor,
-						     enable ? SPINOR_OP_EN4B :
-							      SPINOR_OP_EX4B,
-						     NULL, 0);
+		ret = spi_nor_controller_ops_write_reg(nor,
+						       enable ? SPINOR_OP_EN4B :
+								SPINOR_OP_EX4B,
+						       NULL, 0);
 	}
 
 	if (ret)
@@ -421,8 +439,8 @@ static int spansion_set_4byte_addr_mode(struct spi_nor *nor, bool enable)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_BRWR,
-						     nor->bouncebuf, 1);
+		ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_BRWR,
+						       nor->bouncebuf, 1);
 	}
 
 	if (ret)
@@ -453,8 +471,8 @@ int spi_nor_write_ear(struct spi_nor *nor, u8 ear)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_WREAR,
-						     nor->bouncebuf, 1);
+		ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_WREAR,
+						       nor->bouncebuf, 1);
 	}
 
 	if (ret)
@@ -484,8 +502,8 @@ int spi_nor_xread_sr(struct spi_nor *nor, u8 *sr)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->read_reg(nor, SPINOR_OP_XRDSR,
-						    sr, 1);
+		ret = spi_nor_controller_ops_read_reg(nor, SPINOR_OP_XRDSR, sr,
+						      1);
 	}
 
 	if (ret)
@@ -529,8 +547,8 @@ static void spi_nor_clear_sr(struct spi_nor *nor)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_CLSR,
-						     NULL, 0);
+		ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_CLSR,
+						       NULL, 0);
 	}
 
 	if (ret)
@@ -593,8 +611,8 @@ static void spi_nor_clear_fsr(struct spi_nor *nor)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_CLFSR,
-						     NULL, 0);
+		ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_CLFSR,
+						       NULL, 0);
 	}
 
 	if (ret)
@@ -737,8 +755,8 @@ static int spi_nor_write_sr(struct spi_nor *nor, const u8 *sr, size_t len)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_WRSR,
-						     sr, len);
+		ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_WRSR, sr,
+						       len);
 	}
 
 	if (ret) {
@@ -939,8 +957,8 @@ static int spi_nor_write_sr2(struct spi_nor *nor, const u8 *sr2)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_WRSR2,
-						     sr2, 1);
+		ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_WRSR2,
+						       sr2, 1);
 	}
 
 	if (ret) {
@@ -973,8 +991,8 @@ static int spi_nor_read_sr2(struct spi_nor *nor, u8 *sr2)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->read_reg(nor, SPINOR_OP_RDSR2,
-						    sr2, 1);
+		ret = spi_nor_controller_ops_read_reg(nor, SPINOR_OP_RDSR2, sr2,
+						      1);
 	}
 
 	if (ret)
@@ -1004,8 +1022,9 @@ static int spi_nor_erase_chip(struct spi_nor *nor)
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_CHIP_ERASE,
-						     NULL, 0);
+		ret = spi_nor_controller_ops_write_reg(nor,
+						       SPINOR_OP_CHIP_ERASE,
+						       NULL, 0);
 	}
 
 	if (ret)
@@ -1146,7 +1165,7 @@ static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
 
 		return spi_mem_exec_op(nor->spimem, &op);
 	} else if (nor->controller_ops->erase) {
-		return nor->controller_ops->erase(nor, addr);
+		return spi_nor_controller_ops_erase(nor, addr);
 	}
 
 	/*
@@ -1158,8 +1177,8 @@ static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
 		addr >>= 8;
 	}
 
-	return nor->controller_ops->write_reg(nor, nor->erase_opcode,
-					      nor->bouncebuf, nor->addr_width);
+	return spi_nor_controller_ops_write_reg(nor, nor->erase_opcode,
+						nor->bouncebuf, nor->addr_width);
 }
 
 /**