[U-Boot] [PATCH V3 1/2] power: domain: add dev_power_domain_on

[Peng Fan]

Add this new API to power on multiple domains attached
to a device.

Signed-off-by: Peng Fan <peng.fan at nxp.com>
Reviewed-by: Lokesh Vutla <lokeshvutla at ti.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---

V3:
 Fix build break
 Add R-b tag
V2:
 create dev_power_domain_on

 drivers/power/domain/power-domain-uclass.c | 22 ++++++++++++++++++++++
 include/power-domain.h                     | 17 +++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/drivers/power/domain/power-domain-uclass.c b/drivers/power/domain/power-domain-uclass.c
index 2ea0ff24c7..6eb4267de3 100644
--- a/drivers/power/domain/power-domain-uclass.c
+++ b/drivers/power/domain/power-domain-uclass.c
@@ -107,6 +107,28 @@ int power_domain_off(struct power_domain *power_domain)
 	return ops->off(power_domain);
 }
 
+
+#if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA))
+int dev_power_domain_on(struct udevice *dev)
+{
+	struct power_domain pd;
+	int i, count, ret;
+
+	count = dev_count_phandle_with_args(dev, "power-domains",
+					    "#power-domain-cells");
+	for (i = 0; i < count; i++) {
+		ret = power_domain_get_by_index(dev, &pd, i);
+		if (ret)
+			return ret;
+		ret = power_domain_on(&pd);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+#endif
+
 UCLASS_DRIVER(power_domain) = {
 	.id		= UCLASS_POWER_DOMAIN,
 	.name		= "power_domain",
diff --git a/include/power-domain.h b/include/power-domain.h
index ef15dc9f60..490fedbb12 100644
--- a/include/power-domain.h
+++ b/include/power-domain.h
@@ -155,4 +155,21 @@ static inline int power_domain_off(struct power_domain *power_domain)
 }
 #endif
 
+/**
+ * dev_power_domain_on - Enable power domains for a device .
+ *
+ * @dev:		The client device.
+ *
+ * @return 0 if OK, or a negative error code.
+ */
+#if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) && \
+	CONFIG_IS_ENABLED(POWER_DOMAIN)
+int dev_power_domain_on(struct udevice *dev);
+#else
+static inline int dev_power_domain_on(struct udevice *dev)
+{
+	return 0;
+}
+#endif
+
 #endif
-- 
2.16.4