remoteproc: Add new RPROC_DETACHED state

Add a new RPROC_DETACHED state to take into account scenarios
where the remoteproc core needs to attach to a remote processor
that is booted by another entity.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20200714195035.1426873-2-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index 52b8713..2647597 100644 (file)
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -72,6 +72,7 @@ static const char * const rproc_state_string[] = {
        [RPROC_RUNNING]         = "running",
        [RPROC_CRASHED]         = "crashed",
        [RPROC_DELETED]         = "deleted",
+       [RPROC_DETACHED]        = "detached",
        [RPROC_LAST]            = "invalid",
 };
 

diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index e7b7bab..21182ad 100644 (file)
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -400,6 +400,8 @@ struct rproc_ops {
  * @RPROC_RUNNING:     device is up and running
  * @RPROC_CRASHED:     device has crashed; need to start recovery
  * @RPROC_DELETED:     device is deleted
+ * @RPROC_DETACHED:    device has been booted by another entity and waiting
+ *                     for the core to attach to it
  * @RPROC_LAST:                just keep this one at the end
  *
  * Please note that the values of these states are used as indices
@@ -414,7 +416,8 @@ enum rproc_state {
        RPROC_RUNNING   = 2,
        RPROC_CRASHED   = 3,
        RPROC_DELETED   = 4,
-       RPROC_LAST      = 5,
+       RPROC_DETACHED  = 5,
+       RPROC_LAST      = 6,
 };
 
 /**