Hello.
Sudhakar Rajashekhara wrote:
On some platforms, MTD device can hold MAC address, calibration
data, serial numbers etc.
On TI's DA850/OMAP-L138/AM18xx EVM, MAC address is stored on
the last sector of the SPI flash, which is exported as an MTD
device.
This patch adds two new members to the 'flash_platform_data'
structure, a function handler which will be called after
add_mtd_device() and an argument to be passed to this function,
for example: offset to read from.
Signed-off-by: Sudhakar Rajashekhara <[email protected]>
---
drivers/mtd/devices/m25p80.c | 15 +++++++++++++--
include/linux/spi/flash.h | 2 ++
2 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 81e49a9..b832091 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
[...]
@@ -924,13 +925,23 @@ static int __devinit m25p_probe(struct spi_device *spi)
(long long)(parts[i].size >> 10));
}
flash->partitioned = 1;
- return add_mtd_partitions(&flash->mtd, parts, nr_parts);
+ ret = add_mtd_partitions(&flash->mtd, parts, nr_parts);
+ if (!ret)
+ goto out;
+
+ return ret;
}
} else if (data && data->nr_parts)
dev_warn(&spi->dev, "ignoring %d default partitions on %s\n",
data->nr_parts, data->name);
- return add_mtd_device(&flash->mtd) == 1 ? -ENODEV : 0;
+ ret = add_mtd_device(&flash->mtd);
+
+out:
+ if (data->setup && !ret)
+ (data->setup)(&flash->mtd, (void *)data->context);
Parens not necessary around 'data->setup'.
diff --git a/include/linux/spi/flash.h b/include/linux/spi/flash.h
index 3f22932..daa4875 100644
--- a/include/linux/spi/flash.h
+++ b/include/linux/spi/flash.h
@@ -24,6 +24,8 @@ struct flash_platform_data {
unsigned int nr_parts;
char *type;
+ void (*setup)(struct mtd_info *, void *context);
+ void *context;
/* we'll likely add more ... use JEDEC IDs, etc */
};
Hm, is m25p80.c the only SPI flash driver using this structure? I guess
not -- I'm seeing at least sst25l.c and mtd_dataflash.c...
WBR, Sergei
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