[PATCH V3 08/14] i3c: master: Support IBI-based wakeup capability
Adrian Hunter <[email protected]> Tue, 4 Aug 2026 16:38:04 +0300
| Newsgroups | org.kernel.vger.linux-pci,org.infradead.lists.linux-i3c,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pm |
|---|---|
| Organization | Intel Finland Oy, Registered Address: c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo, Business Identity Code: 0357606 - 4, Domiciled in Helsinki |
| Message-ID | <[email protected]> |
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 <[email protected]> Reviewed-by: Frank Li <[email protected]> --- Changes in V3: None Changes in V2: Dropped the redundant #include <linux/pm_wakeup.h>. That header must not be included directly, and linux/device.h, which is already included, provides device_set_wakeup_capable(). drivers/i3c/master.c | 7 +++++++ include/linux/i3c/master.h | 2 ++ 2 files changed, 9 insertions(+) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index e7ea41007889..e6b320da475e 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -2110,6 +2110,13 @@ i3c_master_register_new_i3c_devs(struct i3c_master_controller *master) if (desc->boardinfo) device_set_node(&desc->dev->dev, desc->boardinfo->fwnode); + /* + * In the case of IBI wakeup, any IBI-capable device can + * wakeup. + */ + 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); } diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index 2b96c4ea75fb..16394aca7230 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -523,6 +523,7 @@ 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 @@ -562,6 +563,7 @@ 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; -- 2.53.0