[PATCH v2 2/6] remoteproc: sysmon: Add notifications for events

[Siddharth Gupta <sidgup@codeaurora.org>]

Add notification for other stages of remoteproc boot and shutdown. This
includes adding callback functions for the prepare and unprepare events,
and fleshing out the callback function for start.

Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
---
 drivers/remoteproc/qcom_sysmon.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/drivers/remoteproc/qcom_sysmon.c b/drivers/remoteproc/qcom_sysmon.c
index 1366050..851664e 100644
--- a/drivers/remoteproc/qcom_sysmon.c
+++ b/drivers/remoteproc/qcom_sysmon.c
@@ -439,8 +439,31 @@ static const struct qmi_ops ssctl_ops = {
 	.del_server = ssctl_del_server,
 };
 
+static int sysmon_prepare(struct rproc_subdev *subdev)
+{
+	struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon,
+						  subdev);
+	struct sysmon_event event = {
+		.subsys_name = sysmon->name,
+		.ssr_event = SSCTL_SSR_EVENT_BEFORE_POWERUP
+	};
+
+	blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event);
+
+	return 0;
+}
+
 static int sysmon_start(struct rproc_subdev *subdev)
 {
+	struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon,
+						  subdev);
+	struct sysmon_event event = {
+		.subsys_name = sysmon->name,
+		.ssr_event = SSCTL_SSR_EVENT_AFTER_POWERUP
+	};
+
+	blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event);
+
 	return 0;
 }
 
@@ -464,6 +487,18 @@ static void sysmon_stop(struct rproc_subdev *subdev, bool crashed)
 		sysmon_request_shutdown(sysmon);
 }
 
+static void sysmon_unprepare(struct rproc_subdev *subdev)
+{
+	struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon,
+						  subdev);
+	struct sysmon_event event = {
+		.subsys_name = sysmon->name,
+		.ssr_event = SSCTL_SSR_EVENT_AFTER_SHUTDOWN
+	};
+
+	blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event);
+}
+
 /**
  * sysmon_notify() - notify sysmon target of another's SSR
  * @nb:		notifier_block associated with sysmon instance
@@ -563,8 +598,10 @@ struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
 
 	qmi_add_lookup(&sysmon->qmi, 43, 0, 0);
 
+	sysmon->subdev.prepare = sysmon_prepare;
 	sysmon->subdev.start = sysmon_start;
 	sysmon->subdev.stop = sysmon_stop;
+	sysmon->subdev.unprepare = sysmon_unprepare;
 
 	rproc_add_subdev(rproc, &sysmon->subdev);
 
-- 
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