soc: qcom: pmic_glink: Add support for SOCCP remoteproc channels

System On Chip Control Processor (SOCCP) is a subsystem that can have
battery management firmware running on it to support Type-C/PD and
battery charging. SOCCP does not have multiple PDs and hence PDR is not
supported. So, if the subsystem comes up/down, rpmsg driver would be
probed or removed. Use that for notifying clients of pmic_glink for
PDR events.

Add support for battery management FW running on SOCCP by adding the
"PMIC_RTR_SOCCP_APPS" channel name to the rpmsg_match list and
updating notify_clients logic.

Signed-off-by: Anjelique Melendez <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bjorn Andersson <[e-mail]>

drivers/soc/qcom/pmic_glink.c

···
 	struct mutex state_lock;
 	unsigned int client_state;
 	unsigned int pdr_state;
+	bool pdr_available;
 
 	/* serializing clients list updates */
 	spinlock_t client_lock;
···
 		return dev_err_probe(&rpdev->dev, -ENODEV, "no pmic_glink device to attach to\n");
 
 	dev_set_drvdata(&rpdev->dev, pg);
+	pg->pdr_available = rpdev->id.driver_data;
 
 	guard(mutex)(&pg->state_lock);
 	pg->ept = rpdev->ept;
+	if (!pg->pdr_available)
+		pg->pdr_state = SERVREG_SERVICE_STATE_UP;
 	pmic_glink_state_notify_clients(pg);
 
 	return 0;
···
 
 	guard(mutex)(&pg->state_lock);
 	pg->ept = NULL;
+	if (!pg->pdr_available)
+		pg->pdr_state = SERVREG_SERVICE_STATE_DOWN;
 	pmic_glink_state_notify_clients(pg);
 }
 
 static const struct rpmsg_device_id pmic_glink_rpmsg_id_match[] = {
-	{ "PMIC_RTR_ADSP_APPS" },
+	{.name = "PMIC_RTR_ADSP_APPS", .driver_data = true },
+	{.name = "PMIC_RTR_SOCCP_APPS", .driver_data = false },
 	{}
 };