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[v8,08/17] remoteproc: Add new detach() remoteproc operation

Message ID 20210312162453.1234145-9-mathieu.poirier@linaro.org (mailing list archive)
State New, archived
Headers show
Series remoteproc: Add support for detaching a remote processor | expand

Commit Message

Mathieu Poirier March 12, 2021, 4:24 p.m. UTC
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(+)
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diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 51538a7d120d..eff55ec72e80 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)
@@ -385,6 +386,7 @@  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);