Add the print message to tell us why the erase operation doesn't work.

Signed-off-by: Wenyou Yang wenyou.yang@microchip.com ---

drivers/mtd/spi/sf_dataflash.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/spi/sf_dataflash.c b/drivers/mtd/spi/sf_dataflash.c index b2166ad4e5..a1a79a4d02 100644 --- a/drivers/mtd/spi/sf_dataflash.c +++ b/drivers/mtd/spi/sf_dataflash.c @@ -131,11 +131,17 @@ static int spi_dataflash_erase(struct udevice *dev, u32 offset, size_t len) debug("%s: erase addr=0x%x len 0x%x\n", dev->name, offset, len);

div_u64_rem(len, spi_flash->page_size, &rem); - if (rem) + if (rem) { + printf("%s: len(0x%x) isn't the multiple of page size(0x%x)\n", + dev->name, len, spi_flash->page_size); return -EINVAL; + } div_u64_rem(offset, spi_flash->page_size, &rem); - if (rem) + if (rem) { + printf("%s: offset(0x%x) isn't the multiple of page size(0x%x)\n", + dev->name, offset, spi_flash->page_size); return -EINVAL; + }

status = spi_claim_bus(spi); if (status) {