[PATCH v16 02/15] mtd: spi-nor: add spi_nor_controller_ops_{read_reg,write_reg,erase}()

Pratyush Yadav
2020-10-05T15:37:53Z

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>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
drivers/mtd/spi-nor/core.c | 87 +++++++++++++++++++++++---------------
1 file changed, 53 insertions(+), 34 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 4d0f8d165544..7a3bf460a2fa 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);
}

/**
--
2.28.0