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mtd: spi-nor: allow a flash to define its own ready() function 

Xilinx and Micron flashes have their own implementation of the
spi_nor_ready() function. At the moment, the core will figure out
which one to call according to some flags. Lay the foundation to
make it possible that a flash can register its own ready()
function.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Link: https://lore.kernel.org/r/20220223134358.1914798-19-michael@walle.cc
This commit is contained in:
Michael Walle 2022-02-23 14:43:44 +01:00 committed by Tudor Ambarus
parent b44aa9ac6b
commit 4cf1c7bdc5
2 changed files with 8 additions and 0 deletions
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4
drivers/mtd/spi-nor/core.c
View File

@ -794,6 +794,10 @@ static int spi_nor_ready(struct spi_nor *nor)
{
int sr, fsr;
/* Flashes might override the standard routine. */
if (nor->params->ready)
return nor->params->ready(nor);
if (nor->flags & SNOR_F_READY_XSR_RDY)
sr = spi_nor_xsr_ready(nor);
else

4
drivers/mtd/spi-nor/core.h
View File

@ -261,6 +261,9 @@ struct spi_nor_otp {
* SPI NOR flashes that have peculiarities to the SPI NOR
* standard e.g. different opcodes, specific address
* calculation, page size, etc.
* @ready: (optional) flashes might use a different mechanism
* than reading the status register to indicate they
* are ready for a new command
* @locking_ops: SPI NOR locking methods.
*/
struct spi_nor_flash_parameter {
@ -282,6 +285,7 @@ struct spi_nor_flash_parameter {
int (*set_4byte_addr_mode)(struct spi_nor *nor, bool enable);
u32 (*convert_addr)(struct spi_nor *nor, u32 addr);
int (*setup)(struct spi_nor *nor, const struct spi_nor_hwcaps *hwcaps);
int (*ready)(struct spi_nor *nor);
const struct spi_nor_locking_ops *locking_ops;
};