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dfu: dfu_sf: Read the SPI flash in 16 MiB chunks

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Not all SPI flashes and controllers can do continuous transfer longer
than 16 MiB, so perform the DFU read in 16 MiB chunks.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
This commit is contained in:
Marek Vasut 2021-09-14 05:26:51 +02:00 committed by Tom Rini
parent 949eb228f3
commit ca341e98c8
1 changed files with 12 additions and 2 deletions
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14
drivers/dfu/dfu_sf.c
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@ -24,8 +24,18 @@ static int dfu_get_medium_size_sf(struct dfu_entity *dfu, u64 *size)
static int dfu_read_medium_sf(struct dfu_entity *dfu, u64 offset, void *buf,
long *len)
{
return spi_flash_read(dfu->data.sf.dev, dfu->data.sf.start + offset,
*len, buf);
long seglen = *len;
int ret;
if (seglen > (16 << 20))
seglen = (16 << 20);
ret = spi_flash_read(dfu->data.sf.dev, dfu->data.sf.start + offset,
seglen, buf);
if (!ret)
*len = seglen;
return ret;
}
static u64 find_sector(struct dfu_entity *dfu, u64 start, u64 offset)