linux-kernel - [PATCH v2] soc: qcom: pmic_glink: Add support for SOCCP remoteproc channels

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Message-Id: <20250919175025.2988948-1-anjelique.melendez@oss.qualcomm.com>
Date: Fri, 19 Sep 2025 10:50:25 -0700
From: Anjelique Melendez <anjelique.melendez@....qualcomm.com>
To: andersson@...nel.org, konradybcio@...nel.org
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] 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 <anjelique.melendez@....qualcomm.com>
---
Changes since V1:
  - Updated commit message
  - Removed enum defintions and isntead using booleans
  - Simplified logic by setting pg->pdr_state directly if pdr is not available
---
 drivers/soc/qcom/pmic_glink.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/pmic_glink.c b/drivers/soc/qcom/pmic_glink.c
index c0a4be5df926..627f96ca322e 100644
--- a/drivers/soc/qcom/pmic_glink.c
+++ b/drivers/soc/qcom/pmic_glink.c
@@ -39,6 +39,7 @@ struct pmic_glink {
 	struct mutex state_lock;
 	unsigned int client_state;
 	unsigned int pdr_state;
+	bool pdr_available;
 
 	/* serializing clients list updates */
 	spinlock_t client_lock;
@@ -246,9 +247,12 @@ static int pmic_glink_rpmsg_probe(struct rpmsg_device *rpdev)
 		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;
@@ -265,11 +269,14 @@ static void pmic_glink_rpmsg_remove(struct rpmsg_device *rpdev)
 
 	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 },
 	{}
 };
 
-- 
2.34.1