On 7/14/2022 7:30 AM, Jae Hyun Yoo wrote:
On 7/14/2022 7:21 AM, Michael Walle wrote:
Am 2022-07-14 16:16, schrieb Michael Walle:
Am 2022-07-14 15:47, schrieb Jae Hyun Yoo:
On 7/14/2022 12:41 AM, Michael Walle wrote:
What does "doesn't boot at all" mean? Are there any kernel startup
I'm sharing the error messages below.
[ 0.748594] spi-nor spi0.0: w25q512nwq (65536 Kbytes)
[ 0.865216] spi-aspeed-smc 1e620000.spi: CE0 read buswidth:4 [0x406c0741]
[ 0.872833] ------------[ cut here ]------------
[ 0.877984] WARNING: CPU: 1 PID: 1 at drivers/mtd/mtdcore.c:583
[ 0.887237] CPU: 1 PID: 1 Comm: swapper/0 Not tainted
Could you please try it on the latest (vanilla) linux-next?
or spi-nor/next  as there are quite a lot of changes. The
patches shall be based on that.
Okay. Let me try that. I tested it using 5.15.43 with back-ported
spi-nor patches from the latest. I'll back-port more changes from
the spi-nor/next and will test the INFO(0xef6020, 0, 0, 0) setting
I tested the setting again after cherry picking all SPI relating changes
from the 'for-next' branch of
No luck! It's still making the same warning dump at 'add_mtd_device'
since 'mtd->erasesize' is checked as 0.
I traced it further to check if the erasesize is properly parsed from
the sfdp and checked that erase map seems parsed and initialized
correctly in 'spi_nor_parse_bfpt' but problem is, a target
mtd->erasesize is not properly selected in 'spi_nor_select_erase' since
the 'wanted_size' variable is initialized as sector size of info table
so a selected target mtd->erasesize is also 0 so looks like it's the
reason why it can't initialize mtd device if we use
INFO(0xef6020, 0, 0, 0).
Also, checked that the mtd->erasesize is set to 4096 if I enable
CONFIG_MTD_SPI_NOR_USE_4K_SECTORS so the SPI flash can be initialized
with the INFO(0xef6020, 0, 0, 0) setting but, it should cover even
the configuration is not enabled. I think, this patch should go as it
is. The erasesize selecting issue could be fixed using a separate
Are you still sure that the INFO(0xef6020, 0, 0, 0) works in the