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authorLinus Torvalds <torvalds@linux-foundation.org>2026-09-25 15:55:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-09-25 15:55:03 -0700
commit75467f60a3d14f08f86f2b353298d2826382ff23 (patch)
treeacd8a7d5b5a675042449386efa5b42ec44d8bf81 /Documentation/ABI/testing/sysfs-class-spi-eeprom
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Merge tag 'ipe-pr-20260925' of git://git.kernel.org/pub/scm/linux/kernel/git/wufan/ipegrafted
Pull IPE fixes from Fan Wu: "Two fixes for use-after-free issues found by recent LLM-assisted code analysis. - move successful policy load auditing under the new policy directory's inode lock, preventing a concurrent policy deletion from freeing the policy while it is still being audited - protect the dm-verity root hash with RCU, preventing policy evaluation from racing with root hash replacement during preresume" * tag 'ipe-pr-20260925' of git://git.kernel.org/pub/scm/linux/kernel/git/wufan/ipe: ipe: protect the dm-verity root hash with RCU ipe: fix use-after-free when auditing a newly loaded policy
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+What: /sys/class/spi_master/spi<bus>/spi<bus>.<dev>/fram
+Date: June 2021
+KernelVersion: 5.14
+Contact: Jiri Prchal <jiri.prchal@aksignal.cz>
+Description:
+ Contains the FRAM binary data. Same as EEPROM, just another file
+ name to indicate that it employs ferroelectric process.
+ It performs write operations at bus speed - no write delays.
+
+What: /sys/class/spi_master/spi<bus>/spi<bus>.<dev>/sernum
+Date: May 2021
+KernelVersion: 5.14
+Contact: Jiri Prchal <jiri.prchal@aksignal.cz>
+Description:
+ Contains the serial number of the Cypress FRAM (FM25VN) if it is
+ present. It will be displayed as a 8 byte hex string, as read
+ from the device.
+
+ This is a read-only attribute.
+
+What: /sys/class/spi_master/spi<bus>/spi<bus>.<dev>/jedec_id
+Date: January 2026
+KernelVersion: 6.19
+Contact: Patrick Wicki <patrick.wicki@siemens.com>
+Description:
+ Contains the raw JEDEC ID bytes returned by the RDID (0x9f) command. The
+ bytes are exposed as a hex string in big-endian order as read from the
+ device.
+
+ This is a read-only attribute.