[PATCH RFC RESEND 1/7] i3c: master: Support IBI-based wakeup capability
Adrian Hunter <[email protected]> Wed, 1 Jul 2026 23:15:27 +0300
| Newsgroups | org.infradead.lists.linux-i3c,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pci,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]> --- drivers/i3c/master.c | 8 ++++++++ include/linux/i3c/master.h | 2 ++ 2 files changed, 10 insertions(+) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index f1be38a640ca..a47e2924bb70 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -17,6 +17,7 @@ #include <linux/list.h> #include <linux/of.h> #include <linux/pm_runtime.h> +#include <linux/pm_wakeup.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/workqueue.h> @@ -1930,6 +1931,13 @@ i3c_master_register_new_i3c_devs(struct i3c_master_controller *master) if (desc->boardinfo) desc->dev->dev.of_node = desc->boardinfo->of_node; + /* + * 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); + ret = device_register(&desc->dev->dev); if (ret) { dev_err(&master->dev, diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index 4d2a68793324..af3c35a8e7b6 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -511,6 +511,7 @@ 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 @@ -545,6 +546,7 @@ 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 -- linux-i3c mailing list [email protected] http://lists.infradead.org/mailman/listinfo/linux-i3c