linux-kernel - [PATCH v3 07/14] remoteproc: Introducting new start and stop functions

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Message-Id: <20200424200135.28825-8-mathieu.poirier@linaro.org>
Date:   Fri, 24 Apr 2020 14:01:28 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     bjorn.andersson@...aro.org, ohad@...ery.com
Cc:     loic.pallardy@...com, arnaud.pouliquen@...com, s-anna@...com,
        linux-remoteproc@...r.kernel.org, corbet@....net,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 07/14] remoteproc: Introducting new start and stop functions

Add new functions to replace direct calling of rproc->ops->start() and
rproc->ops->stop().  That way different behaviour can be played out
when booting a remote processor or synchronising with it.

Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
 drivers/remoteproc/remoteproc_core.c     |  6 +++---
 drivers/remoteproc/remoteproc_internal.h | 16 ++++++++++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 9de0e2b7ca2b..ef88d3e84bfb 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1339,7 +1339,7 @@ static int rproc_start(struct rproc *rproc, const struct firmware *fw)
 	}
 
 	/* power up the remote processor */
-	ret = rproc->ops->start(rproc);
+	ret = rproc_start_device(rproc);
 	if (ret) {
 		dev_err(dev, "can't start rproc %s: %d\n", rproc->name, ret);
 		goto unprepare_subdevices;
@@ -1360,7 +1360,7 @@ static int rproc_start(struct rproc *rproc, const struct firmware *fw)
 	return 0;
 
 stop_rproc:
-	rproc->ops->stop(rproc);
+	rproc_stop_device(rproc);
 unprepare_subdevices:
 	rproc_unprepare_subdevices(rproc);
 reset_table_ptr:
@@ -1493,7 +1493,7 @@ static int rproc_stop(struct rproc *rproc, bool crashed)
 	rproc->table_ptr = rproc->cached_table;
 
 	/* power off the remote processor */
-	ret = rproc->ops->stop(rproc);
+	ret = rproc_stop_device(rproc);
 	if (ret) {
 		dev_err(dev, "can't stop rproc: %d\n", ret);
 		return ret;
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 47b500e40dd9..dda7044c4b3e 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -125,6 +125,22 @@ struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc,
 	return NULL;
 }
 
+static inline int rproc_start_device(struct rproc *rproc)
+{
+	if (rproc->ops && rproc->ops->start)
+		return rproc->ops->start(rproc);
+
+	return 0;
+}
+
+static inline int rproc_stop_device(struct rproc *rproc)
+{
+	if (rproc->ops && rproc->ops->stop)
+		return rproc->ops->stop(rproc);
+
+	return 0;
+}
+
 static inline
 bool rproc_u64_fit_in_size_t(u64 val)
 {
-- 
2.20.1