Add an new attach() operation in order to properly deal with
scenarios where the remoteproc core needs to attach to a
remote processor that has been booted by another entity.
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Tested-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
---
drivers/remoteproc/remoteproc_internal.h | 8 ++++++++
include/linux/remoteproc.h | 2 ++
2 files changed, 10 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 4ba7cb59d3e8..fc710866f8ce 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -79,6 +79,14 @@ static inline int rproc_unprepare_device(struct rproc *rproc)
return 0;
}
+static inline int rproc_attach_device(struct rproc *rproc)
+{
+ if (rproc->ops->attach)
+ return rproc->ops->attach(rproc);
+
+ return 0;
+}
+
static inline
int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw)
{
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 21182ad2d059..bf6a310ba870 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -359,6 +359,7 @@ enum rsc_handling_status {
* @unprepare: unprepare device after stop
* @start: power on the device and boot it
* @stop: power off the device
+ * @attach: attach to a device that his already 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)
@@ -379,6 +380,7 @@ struct rproc_ops {
int (*unprepare)(struct rproc *rproc);
int (*start)(struct rproc *rproc);
int (*stop)(struct rproc *rproc);
+ int (*attach)(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
