linux-kernel - [PATCH v1 2/8] remoteproc: qcom: probe all child devices

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Message-Id: <20251223123227.1317244-3-gaurav.kohli@oss.qualcomm.com>
Date: Tue, 23 Dec 2025 18:02:21 +0530
From: Gaurav Kohli <gaurav.kohli@....qualcomm.com>
To: andersson@...nel.org, mathieu.poirier@...aro.org, robh@...nel.org,
        krzk+dt@...nel.org, conor+dt@...nel.org, rafael@...nel.org,
        daniel.lezcano@...aro.org, rui.zhang@...el.com, lukasz.luba@....com,
        konradybcio@...nel.org, amitk@...nel.org, mani@...nel.org,
        casey.connolly@...aro.org
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: [PATCH v1 2/8] remoteproc: qcom: probe all child devices

From: Casey Connolly <casey.connolly@...aro.org>

Generalise the qcom,bam-dmux child node support by probing all
remoteproc children with of_platform_populate(). This will be used to
enable support for devices which are best represented as subnodes of the
remoteproc, such as those representing QMI clients.

Signed-off-by: Casey Connolly <casey.connolly@...aro.org>
---
 drivers/remoteproc/qcom_q6v5.c     | 4 ++++
 drivers/remoteproc/qcom_q6v5_mss.c | 8 --------
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c
index 58d5b85e58cd..a02839c7ed8c 100644
--- a/drivers/remoteproc/qcom_q6v5.c
+++ b/drivers/remoteproc/qcom_q6v5.c
@@ -6,6 +6,7 @@
  * Copyright (C) 2014 Sony Mobile Communications AB
  * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
  */
+#include <linux/of_platform.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/interconnect.h>
@@ -351,6 +352,8 @@ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
 		return dev_err_probe(&pdev->dev, PTR_ERR(q6v5->path),
 				     "failed to acquire interconnect path\n");
 
+	of_platform_populate(q6v5->dev->of_node, NULL, NULL, q6v5->dev);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(qcom_q6v5_init);
@@ -361,6 +364,7 @@ EXPORT_SYMBOL_GPL(qcom_q6v5_init);
  */
 void qcom_q6v5_deinit(struct qcom_q6v5 *q6v5)
 {
+	of_platform_depopulate(q6v5->dev);
 	qmp_put(q6v5->qmp);
 }
 EXPORT_SYMBOL_GPL(qcom_q6v5_deinit);
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 91940977ca89..d40565c1cc62 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -238,7 +238,6 @@ struct q6v5 {
 	struct qcom_rproc_pdm pdm_subdev;
 	struct qcom_rproc_ssr ssr_subdev;
 	struct qcom_sysmon *sysmon;
-	struct platform_device *bam_dmux;
 	bool need_mem_protection;
 	bool has_alt_reset;
 	bool has_mba_logs;
@@ -2029,7 +2028,6 @@ static int q6v5_alloc_memory_region(struct q6v5 *qproc)
 static int q6v5_probe(struct platform_device *pdev)
 {
 	const struct rproc_hexagon_res *desc;
-	struct device_node *node;
 	struct q6v5 *qproc;
 	struct rproc *rproc;
 	const char *mba_image;
@@ -2163,10 +2161,6 @@ static int q6v5_probe(struct platform_device *pdev)
 	if (ret)
 		goto remove_sysmon_subdev;
 
-	node = of_get_compatible_child(pdev->dev.of_node, "qcom,bam-dmux");
-	qproc->bam_dmux = of_platform_device_create(node, NULL, &pdev->dev);
-	of_node_put(node);
-
 	return 0;
 
 remove_sysmon_subdev:
@@ -2186,8 +2180,6 @@ static void q6v5_remove(struct platform_device *pdev)
 	struct q6v5 *qproc = platform_get_drvdata(pdev);
 	struct rproc *rproc = qproc->rproc;
 
-	if (qproc->bam_dmux)
-		of_platform_device_destroy(&qproc->bam_dmux->dev, NULL);
 	rproc_del(rproc);
 
 	qcom_q6v5_deinit(&qproc->q6v5);
-- 
2.34.1