[PATCH v5 25/25] mtd: spi-nor: debugfs: Expose SR opcodes and QE mask
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: 2026-09-04 18:14:30
Also in:
linux-doc, lkml
Subsystem:
memory technology devices (mtd), spi nor subsystem, the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Pratyush Yadav, Michael Walle, Linus Torvalds
Expose Status Register opcodes based on the flash capabilities discovered while parsing the SFDP QER field. Value '0' indicates an absence of opcode (non supported), we do not print anything in that case. The QE bit is also displayed. Example on a W25Q02JV-M: $ grep opcodes -A10 /sys/kernel/debug/spi-nor/spi0.0/params opcodes read 0xec dummy cycles 6 erase 0xdc program 0x34 SR1 read 0x05 SR2 read 0x35 SR1+SR2 write 0x01 QE SR2 bit 1 8D extension none Tested-by: Takahiro Kuwano <takahiro.kuwano@infineon.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> --- drivers/mtd/spi-nor/debugfs.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/mtd/spi-nor/debugfs.c b/drivers/mtd/spi-nor/debugfs.c
index 5c738786145f..3f8d586a7622 100644
--- a/drivers/mtd/spi-nor/debugfs.c
+++ b/drivers/mtd/spi-nor/debugfs.c@@ -104,6 +104,21 @@ static int spi_nor_params_show(struct seq_file *s, void *data) seq_printf(s, " dummy cycles\t%u\n", nor->read_dummy); seq_printf(s, " erase\t\t0x%02x\n", nor->erase_opcode); seq_printf(s, " program\t0x%02x\n", nor->program_opcode); + seq_printf(s, " SR1 read\t0x%02x\n", params->opcodes.read_sr1); + if (params->opcodes.read_sr2) + seq_printf(s, " SR2 read\t0x%02x\n", params->opcodes.read_sr2); + if (params->opcodes.write_sr1) + seq_printf(s, " SR1 write\t0x%02x\n", params->opcodes.write_sr1); + if (params->opcodes.write_sr2) + seq_printf(s, " SR2 write\t0x%02x\n", params->opcodes.write_sr2); + if (params->opcodes.write_sr1_and_sr2) + seq_printf(s, " SR1+SR2 write\t0x%02x\n", + params->opcodes.write_sr1_and_sr2); + + if (params->qe_mask[0] || params->qe_mask[1]) + seq_printf(s, " QE\t\tSR%d bit %d\n", + params->qe_mask[0] ? 1 : 2, + ffs(params->qe_mask[0] | params->qe_mask[1]) - 1); switch (params->cmd_ext_type) { case SPI_NOR_EXT_NONE:
--
2.54.0