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From:   Mathieu Poirier <mathieu.poirier@linaro.org>
To:     ohad@wizery.com, bjorn.andersson@linaro.org, robh+dt@kernel.org
Cc:     arnaud.pouliquen@st.com, linux-remoteproc@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 10/17] remoteproc: Add new detach() remoteproc operation
Date:   Fri, 18 Dec 2020 10:32:21 -0700
Message-Id: <20201218173228.2277032-11-mathieu.poirier@linaro.org>
In-Reply-To: <20201218173228.2277032-1-mathieu.poirier@linaro.org>
References: <20201218173228.2277032-1-mathieu.poirier@linaro.org>
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Add an new detach() operation in order to support scenarios where
the remoteproc core is going away but the remote processor is
kept operating.  This could be the case when the system is
rebooted or when the platform driver is removed.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
---
 include/linux/remoteproc.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 257a5005f93e..9bb34c3eb847 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -361,6 +361,7 @@ enum rsc_handling_status {
  * @start:	power on the device and boot it
  * @stop:	power off the device
  * @attach:	attach to a device that his already powered up
+ * @detach:	detach from a device, leaving it powered up
  * @kick:	kick a virtqueue (virtqueue id given as a parameter)
  * @da_to_va:	optional platform hook to perform address translations
  * @parse_fw:	parse firmware to extract information (e.g. resource table)
@@ -384,6 +385,7 @@ struct rproc_ops {
 	int (*start)(struct rproc *rproc);
 	int (*stop)(struct rproc *rproc);
 	int (*attach)(struct rproc *rproc);
+	int (*detach)(struct rproc *rproc);
 	void (*kick)(struct rproc *rproc, int vqid);
 	void * (*da_to_va)(struct rproc *rproc, u64 da, size_t len);
 	int (*parse_fw)(struct rproc *rproc, const struct firmware *fw);
-- 
2.25.1