[PATCH 1/4] remoteproc: qcom: probe all child devices

From: Caleb Connolly <caleb.connolly@linaro.org>
To: Andy Gross <agross@kernel.org>,
	Bhupesh Sharma <bhupesh.linux@gmail.com>,
	Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Amit Kucheria <amitk@kernel.org>, Zhang Rui <rui.zhang@intel.com>,
	Sibi Sankar <quic_sibis@quicinc.com>,
	Manivannan Sadhasivam <mani@kernel.org>,
	Thara Gopinath <thara.gopinath@gmail.com>
Cc: linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org,
	devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
	Caleb Connolly <caleb.connolly@linaro.org>
Subject: [PATCH 1/4] remoteproc: qcom: probe all child devices
Date: Fri, 29 Sep 2023 17:16:17 +0100	[thread overview]
Message-ID: <20230905-caleb-qmi_cooling-v1-1-5aa39d4164a7@linaro.org> (raw)
In-Reply-To: <20230905-caleb-qmi_cooling-v1-0-5aa39d4164a7@linaro.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: Caleb Connolly <caleb.connolly@linaro.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 4ee5e67a9f03..8aa5c7b05429 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>
@@ -349,6 +350,8 @@ 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);
@@ -359,6 +362,7 @@ 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 22fe7b5f5236..ab7e426777c7 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -230,7 +230,6 @@ struct q6v5 {
 	struct qcom_rproc_subdev smd_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;
@@ -1969,7 +1968,6 @@ 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;
@@ -2113,10 +2111,6 @@ 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:
@@ -2138,8 +2132,6 @@ 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);

-- 
2.42.0

