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[v3,0/2] Expose reset reason through sysfs

Message ID 20230616135252.2787679-1-miquel.raynal@bootlin.com
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Series Expose reset reason through sysfs | expand

Message

Miquel Raynal June 16, 2023, 1:52 p.m. UTC 
Hello,

Back in 2019, my colleague Kamel did try to upstream a small change in
the at91 reset driver, in order to expose the reset reason through sysfs
instead of expecting userland to grep through dmesg to get it. There was
basically no strong reason opposed to it, besides minor changes which
needed fixing. 4 years ago I am seeing again the need for such exposure,
so here is Kamel's patch with the minor comments addressed, as well as a
small cleanup just before.

Link: https://lore.kernel.org/lkml/00f4e9a2-f6bd-9242-cafd-9c0c4f4dc619@microchip.com/T/

Cheers,
Miquèl

Changes in v3:
* Made the series bisectable.
* Updated the date and kernel version for this new feature.
* Changed a few definitions as discussed with Sebastian.

Changes in v2:
* Collected Nicolas' Acked-by
* Dropped the Xtal frequency information (as this may change between
  platforms of course).

Kamel Bouhara (1):
  power: reset: at91-reset: add sysfs interface to the power on reason

Miquel Raynal (1):
  power: reset: at91-reset: change the power on reason prototype

 .../testing/sysfs-platform-power-on-reason    | 12 +++++
 drivers/power/reset/at91-reset.c              | 44 +++++++++++++------
 include/linux/power/power_on_reason.h         | 19 ++++++++
 3 files changed, 61 insertions(+), 14 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-platform-power-on-reason
 create mode 100644 include/linux/power/power_on_reason.h