[PATCH v2 2/6] drivers: qcom: rpmh: export controller idle status

[Raju P L S S S N <rplsssn@codeaurora.org>]

From: Lina Iyer <ilina@codeaurora.org>

Allow the controller state be read by platform drivers. This is useful
for PM drivers which can choose to disallow idle modes when the
controller is busy.

Signed-off-by: Lina Iyer <ilina@codeaurora.org>
Signed-off-by: Raju P.L.S.S.S.N <rplsssn@codeaurora.org>
---
 drivers/soc/qcom/rpmh.c | 13 +++++++++++++
 include/soc/qcom/rpmh.h |  5 +++++
 2 files changed, 18 insertions(+)

diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
index c7beb68..2382276 100644
--- a/drivers/soc/qcom/rpmh.c
+++ b/drivers/soc/qcom/rpmh.c
@@ -511,3 +511,16 @@ int rpmh_invalidate(const struct device *dev)
 	return ret;
 }
 EXPORT_SYMBOL(rpmh_invalidate);
+
+/**
+ * rpmh_ctrlr_idle: Return the controller idle status
+ *
+ * @dev: the device making the request
+ */
+int rpmh_ctrlr_idle(const struct device *dev)
+{
+	struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev);
+
+	return rpmh_rsc_ctrlr_is_idle(ctrlr_to_drv(ctrlr));
+}
+EXPORT_SYMBOL(rpmh_ctrlr_idle);
diff --git a/include/soc/qcom/rpmh.h b/include/soc/qcom/rpmh.h
index 619e07c..d445322 100644
--- a/include/soc/qcom/rpmh.h
+++ b/include/soc/qcom/rpmh.h
@@ -24,6 +24,8 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state,
 
 int rpmh_invalidate(const struct device *dev);
 
+int rpmh_ctrlr_idle(const struct device *dev);
+
 #else
 
 static inline int rpmh_write(const struct device *dev, enum rpmh_state state,
@@ -46,6 +48,9 @@ static inline int rpmh_flush(const struct device *dev)
 static inline int rpmh_invalidate(const struct device *dev)
 { return -ENODEV; }
 
+static inline int rpmh_ctrlr_idle(const struct device *dev)
+{ return -ENODEV; }
+
 #endif /* CONFIG_QCOM_RPMH */
 
 #endif /* __SOC_QCOM_RPMH_H__ */
-- 
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