[PATCH v3 6/9] power: sequencing: Add an API to return the pwrseq device's 'dev' pointer

[Manivannan Sadhasivam via B4 Relay]

From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>

The consumer drivers can make use of the pwrseq device's 'dev' pointer to
query the pwrseq provider's DT node to check for existence of specific
properties.

Hence, add an API to return the pwrseq device's 'dev' pointer to consumers.

Note that since pwrseq_get() would've increased the pwrseq refcount, there
is no need to increase the refcount in this API again.

Tested-by: Wei Deng <wei.deng@xxxxxxxxxxxxxxxx>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>
---
 drivers/power/sequencing/core.c | 9 +++++++++
 include/linux/pwrseq/consumer.h | 7 +++++++
 2 files changed, 16 insertions(+)

diff --git a/drivers/power/sequencing/core.c b/drivers/power/sequencing/core.c
index 4dff71be11b6..96ad557297f5 100644
--- a/drivers/power/sequencing/core.c
+++ b/drivers/power/sequencing/core.c
@@ -965,6 +965,15 @@ int pwrseq_power_off(struct pwrseq_desc *desc)
 }
 EXPORT_SYMBOL_GPL(pwrseq_power_off);
 
+struct device *pwrseq_to_device(struct pwrseq_desc *desc)
+{
+	if (!desc)
+		return NULL;
+
+	return &desc->pwrseq->dev;
+}
+EXPORT_SYMBOL_GPL(pwrseq_to_device);
+
 #if IS_ENABLED(CONFIG_DEBUG_FS)
 
 struct pwrseq_debugfs_count_ctx {
diff --git a/include/linux/pwrseq/consumer.h b/include/linux/pwrseq/consumer.h
index 7d583b4f266e..3c907c9e1885 100644
--- a/include/linux/pwrseq/consumer.h
+++ b/include/linux/pwrseq/consumer.h
@@ -23,6 +23,8 @@ devm_pwrseq_get(struct device *dev, const char *target);
 int pwrseq_power_on(struct pwrseq_desc *desc);
 int pwrseq_power_off(struct pwrseq_desc *desc);
 
+struct device *pwrseq_to_device(struct pwrseq_desc *desc);
+
 #else /* CONFIG_POWER_SEQUENCING */
 
 static inline struct pwrseq_desc * __must_check
@@ -51,6 +53,11 @@ static inline int pwrseq_power_off(struct pwrseq_desc *desc)
 	return -ENOSYS;
 }
 
+static inline struct device *pwrseq_to_device(struct pwrseq_desc *desc)
+{
+	return NULL;
+}
+
 #endif /* CONFIG_POWER_SEQUENCING */
 
 #endif /* __POWER_SEQUENCING_CONSUMER_H__ */

-- 
2.48.1