diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2026-01-23 08:33:23 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2026-01-31 00:02:24 +0100 |
| commit | c481ef12e713fb7c292d04f53b3532ac0804ab3d (patch) | |
| tree | 8539d7c542765c3611799378ba601c3bd9bb2b02 /include | |
| parent | b58eaa4761ab02fc38c39d674a6bcdd55e00f388 (diff) | |
i3c: master: Add i3c_master_do_daa_ext() for post-hibernation address recovery
After system hibernation, I3C Dynamic Addresses may be reassigned at boot
and no longer match the values recorded before suspend. Introduce
i3c_master_do_daa_ext() to handle this situation.
The restore procedure is straightforward: issue a Reset Dynamic Address
Assignment (RSTDAA), then run the standard DAA sequence. The existing DAA
logic already supports detecting and updating devices whose dynamic
addresses differ from previously known values.
Refactor the DAA path by introducing a shared helper used by both the
normal i3c_master_do_daa() path and the new extended restore function,
and correct the kernel-doc in the process.
Export i3c_master_do_daa_ext() so that master drivers can invoke it from
their PM restore callbacks.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260123063325.8210-2-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/i3c/master.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index 38a821395426..592b646f6134 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -605,6 +605,7 @@ int i3c_master_get_free_addr(struct i3c_master_controller *master, int i3c_master_add_i3c_dev_locked(struct i3c_master_controller *master, u8 addr); int i3c_master_do_daa(struct i3c_master_controller *master); +int i3c_master_do_daa_ext(struct i3c_master_controller *master, bool rstdaa); struct i3c_dma *i3c_master_dma_map_single(struct device *dev, void *ptr, size_t len, bool force_bounce, enum dma_data_direction dir); |