Messages in this thread | | | From | Chen-Tsung Hsieh <> | Date | Fri, 28 Jan 2022 02:27:17 +0800 | Subject | Re: [RESEND PATCH] mtd: spi-nor: core: Check written SR value in spi_nor_write_16bit_sr_and_check() |
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On Thu, Jan 27, 2022 at 5:18 PM Michael Walle <michael@walle.cc> wrote: > Ah that ring a bell... Anyway, could you dump the SFDP data please? > See [1], you'll find the files in sysfs. I wonder why that flash is > using the 16bit write at all. > > [1] > https://lore.kernel.org/linux-mtd/4304e19f3399a0a6e856119d01ccabe0@walle.cc/
Dump SFDP data: # xxd -p /sys/class/mtd/mtd0/device/spi-nor/sfdp 53464450060101ff00060110800000ff84000102d00000ffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffe520f9ffffffff0344eb086b083b42bbfeffffffffff 0000ffff40eb0c200f5210d800003602a60082ea14c4e96376337a757a75 f7bdd55c19f75dffe930f880ffffffffffffffffffffffffffffffff0000 f0ffffffffff # md5sum /sys/class/mtd/mtd0/device/spi-nor/sfdp 5294c4d4eb2b1c89c6fd8573d8ceaa2d /sys/class/mtd/mtd0/device/spi-nor/sfdp # cat /sys/class/mtd/mtd0/device/spi-nor/jedec_id ef8017 # cat /sys/class/mtd/mtd0/device/spi-nor/partname w25q64jwm # cat /sys/class/mtd/mtd0/device/spi-nor/manufacturer winbond
"bfpt.dwords[BFPT_DWORD(15)]" is 0xff5df719, and flag SNOR_F_HAS_16BIT_SR is set here: case BFPT_DWORD15_QER_SR2_BIT1: /* * JESD216 rev B or later does not specify if writing only one * byte to the Status Register clears or not the Status * Register 2, so let's be cautious and keep the default * assumption of a 16-bit Write Status (01h) command. */ nor->flags |= SNOR_F_HAS_16BIT_SR; params->quad_enable = spi_nor_sr2_bit1_quad_enable; break;
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