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i3c: master: Support IBI-based wakeup capability

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An I3C controller acts as a bus controller for one or more I3C devices.
If the controller can wake the system in response to an In-Band
Interrupt (IBI), then any device on that bus that is capable of
generating IBIs can potentially be used as a wakeup source.

Add an ibi_wakeup flag to struct i3c_master_controller so controller
drivers can advertise support for IBI-based wakeup.

If set, mark IBI-capable I3C devices as wakeup capable when they are
registered, allowing wakeup management through the standard device
wakeup framework.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Mukesh Savaliya <mukesh.savaliya@oss.qualcomm.com>
Link: https://patch.msgid.link/20260807145638.168865-9-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Adrian Hunter 2026-08-07 17:56:32 +03:00 committed by Alexandre Belloni
parent f44d3b1532
commit 9fd18a8655
2 changed files with 6 additions and 0 deletions
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4
drivers/i3c/master.c
View File

@ -2110,6 +2110,10 @@ i3c_master_register_new_i3c_devs(struct i3c_master_controller *master)
if (desc->boardinfo)
device_set_node(&desc->dev->dev, desc->boardinfo->fwnode);
/* If the device has IBI capability, set as wakeup capable */
if (master->ibi_wakeup && (desc->info.bcr & I3C_BCR_IBI_REQ_CAP))
device_set_wakeup_capable(&desc->dev->dev, true);
list_add_tail(&desc->dev->node, &i3c_unreg_devs);
}

2
include/linux/i3c/master.h
View File

@ -524,6 +524,7 @@ struct i3c_master_controller_ops {
* @hotjoin: true if the master support hotjoin
* @rpm_allowed: true if Runtime PM allowed
* @rpm_ibi_allowed: true if IBI and Hot-Join allowed while runtime suspended
* @ibi_wakeup: IBI can wakeup the system
* @shutting_down: set to true when master begins shutdown or unregister
* @boardinfo.i3c: list of I3C boardinfo objects
* @boardinfo.i2c: list of I2C boardinfo objects
@ -563,6 +564,7 @@ struct i3c_master_controller {
unsigned int hotjoin: 1;
unsigned int rpm_allowed: 1;
unsigned int rpm_ibi_allowed: 1;
unsigned int ibi_wakeup: 1;
bool shutting_down;
struct {
struct list_head i3c;