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mtd: spi-nor-core: Introduce flash-specific fixup hooks

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Sometimes the information in a flash's SFDP tables is wrong. Sometimes
some information just can't be expressed in the SFDP table. So,
introduce the fixup hooks to allow tailoring settings for a specific
flash.

Three hooks are added: default_init, post_sfdp, and post_bfpt. These
allow tweaking the flash settings at different point in the probe
sequence. Since the hooks reside in nor->info, set that value just
before the call to spi_nor_init_params().

The hooks and at what points they are executed mimics Linux's spi-nor
framework. One major difference is that Linux puts the struct
spi_nor_fixups in nor->info. This is not possible in U-Boot because the
spi-nor-ids list is shared between spi-nor-core.c and spi-nor-tiny.c.
Since spi-nor-tiny shouldn't have those fixup hooks populated, add a
separate function that lets flashes populate their fixup hooks.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Pratyush Yadav
2021-06-26 00:47:13 +05:30
committed by Jagan Teki
parent e2e31fa680
commit 8702188ce5
2 changed files with 77 additions and 3 deletions
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2
include/linux/mtd/spi-nor.h
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@@ -416,6 +416,7 @@ struct spi_flash {
* @write_proto: the SPI protocol for write operations
* @reg_proto the SPI protocol for read_reg/write_reg/erase operations
* @cmd_buf: used by the write_reg
* @fixups: flash-specific fixup hooks.
* @prepare: [OPTIONAL] do some preparations for the
* read/write/erase/lock/unlock operations
* @unprepare: [OPTIONAL] do some post work after the
@@ -457,6 +458,7 @@ struct spi_nor {
bool sst_write_second;
u32 flags;
u8 cmd_buf[SPI_NOR_MAX_CMD_SIZE];
struct spi_nor_fixups *fixups;
int (*setup)(struct spi_nor *nor, const struct flash_info *info,
const struct spi_nor_flash_parameter *params,