Messages in this thread | | | From | Sudip Mukherjee <> | Date | Tue, 20 Sep 2022 19:52:56 +0100 | Subject | Re: [PATCH v3 2/2] mtd: spi-nor: add SFDP fixups for Quad Page Program |
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On Tue, Sep 20, 2022 at 7:48 PM Sudip Mukherjee <sudip.mukherjee@sifive.com> wrote: > > SFDP table of some flash chips do not advertise support of Quad Input > Page Program even though it has support. Use flags and add hardware > cap for these chips. > > Signed-off-by: Sudip Mukherjee <sudip.mukherjee@sifive.com> > --- > > Change from v2: SPI_NOR_QUAD_PP added to info->flags instead of > info->fixup_flags. > Link: https://lore.kernel.org/lkml/498c33a8-014f-e542-f143-cba5760fafdd@microchip.com/ > > Results from the tests given by Tudor in the following mail.
Test result after this patch:
# dd if=/dev/urandom of=./qspi_test bs=1M count=6 6+0 records in 6+0 records out
# mtd_debug write /dev/mtd4 0 6291456 qspi_test Copied 6291456 bytes from qspi_test to address 0x00000000 in flash
# mtd_debug erase /dev/mtd4 0 6291456 Erased 6291456 bytes from address 0x00000000 in flash
# mtd_debug read /dev/mtd4 0 6291456 qspi_read Copied 6291456 bytes from address 0x00000000 in flash to qspi_read
# hexdump qspi_read 0000000 ffff ffff ffff ffff ffff ffff ffff ffff * 0600000
# mtd_debug write /dev/mtd4 0 6291456 qspi_test Copied 6291456 bytes from qspi_test to address 0x00000000 in flash
# mtd_debug read /dev/mtd4 0 6291456 qspi_read Copied 6291456 bytes from address 0x00000000 in flash to qspi_read
# sha1sum qspi_test qspi_read fefab5ffbc2ca7bed3b45732f2fe6a8139cd6248 qspi_test fefab5ffbc2ca7bed3b45732f2fe6a8139cd6248 qspi_read
# cat /sys/bus/spi/devices/spi0.0/spi-nor/partname is25wp256
# cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id 9d7019
# cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer issi
# xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp 53464450060101ff00060110300000ff9d05010380000002ffffffffffff ffffffffffffffffffffffffffffffffffffe520f9ffffffff0f44eb086b 083b80bbfeffffffffff00ffffff44eb0c200f5210d800ff234ac90082d8 11cecccd68467a757a75f7aed55c4a422cfff030faa9ffffffffffffffff ffffffffffffffff501950169ff9c0648fefffff
# md5sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp ba14818b9ec42713f24d94d66bb90ba0 /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
-- Regards Sudip
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