dm: regulator: support regulator more state

support parse regulator standard property:
regulator-off-in-suspend;
regulator-init-microvolt;
regulator-suspend-microvolt:
 regulator_get_suspend_enable
 regulator_set_suspend_enable
 regulator_get_suspend_value
 regulator_set_suspend_value

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/drivers/power/regulator/regulator-uclass.c b/drivers/power/regulator/regulator-uclass.c
index 76be95bcd15..90961de95c6 100644
--- a/drivers/power/regulator/regulator-uclass.c
+++ b/drivers/power/regulator/regulator-uclass.c
@@ -77,6 +77,33 @@ int regulator_set_value(struct udevice *dev, int uV)
 	return ret;
 }
 
+int regulator_set_suspend_value(struct udevice *dev, int uV)
+{
+	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+	struct dm_regulator_uclass_platdata *uc_pdata;
+
+	uc_pdata = dev_get_uclass_platdata(dev);
+	if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
+		return -EINVAL;
+	if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
+		return -EINVAL;
+
+	if (!ops->set_suspend_value)
+		return -ENOSYS;
+
+	return ops->set_suspend_value(dev, uV);
+}
+
+int regulator_get_suspend_value(struct udevice *dev)
+{
+	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+
+	if (!ops->get_suspend_value)
+		return -ENOSYS;
+
+	return ops->get_suspend_value(dev);
+}
+
 /*
  * To be called with at most caution as there is no check
  * before setting the actual voltage value.
@@ -170,6 +197,26 @@ int regulator_set_enable_if_allowed(struct udevice *dev, bool enable)
 	return ret;
 }
 
+int regulator_set_suspend_enable(struct udevice *dev, bool enable)
+{
+	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+
+	if (!ops->set_suspend_enable)
+		return -ENOSYS;
+
+	return ops->set_suspend_enable(dev, enable);
+}
+
+int regulator_get_suspend_enable(struct udevice *dev)
+{
+	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+
+	if (!ops->get_suspend_enable)
+		return -ENOSYS;
+
+	return ops->get_suspend_enable(dev);
+}
+
 int regulator_get_mode(struct udevice *dev)
 {
 	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
@@ -235,6 +282,14 @@ int regulator_autoset(struct udevice *dev)
 	int ret = 0;
 
 	uc_pdata = dev_get_uclass_platdata(dev);
+
+	ret = regulator_set_suspend_enable(dev, uc_pdata->suspend_on);
+	if (!ret && uc_pdata->suspend_on) {
+		ret = regulator_set_suspend_value(dev, uc_pdata->suspend_uV);
+		if (!ret)
+			return ret;
+	}
+
 	if (!uc_pdata->always_on && !uc_pdata->boot_on)
 		return -EMEDIUMTYPE;
 
@@ -243,6 +298,8 @@ int regulator_autoset(struct udevice *dev)
 
 	if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
 		ret = regulator_set_value(dev, uc_pdata->min_uV);
+	if (uc_pdata->init_uV > 0)
+		ret = regulator_set_value(dev, uc_pdata->init_uV);
 	if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
 		ret = regulator_set_current(dev, uc_pdata->min_uA);
 
@@ -363,6 +420,7 @@ static int regulator_post_bind(struct udevice *dev)
 static int regulator_pre_probe(struct udevice *dev)
 {
 	struct dm_regulator_uclass_platdata *uc_pdata;
+	ofnode node;
 
 	uc_pdata = dev_get_uclass_platdata(dev);
 	if (!uc_pdata)
@@ -373,6 +431,8 @@ static int regulator_pre_probe(struct udevice *dev)
 						-ENODATA);
 	uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt",
 						-ENODATA);
+	uc_pdata->init_uV = dev_read_u32_default(dev, "regulator-init-microvolt",
+						 -ENODATA);
 	uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp",
 						-ENODATA);
 	uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp",
@@ -382,6 +442,16 @@ static int regulator_pre_probe(struct udevice *dev)
 	uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay",
 						    0);
 
+	node = dev_read_subnode(dev, "regulator-state-mem");
+	if (ofnode_valid(node)) {
+		uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend");
+		if (ofnode_read_u32(node, "regulator-suspend-microvolt", &uc_pdata->suspend_uV))
+			uc_pdata->suspend_uV = uc_pdata->max_uV;
+	} else {
+		uc_pdata->suspend_on = true;
+		uc_pdata->suspend_uV = uc_pdata->max_uV;
+	}
+
 	/* Those values are optional (-ENODATA if unset) */
 	if ((uc_pdata->min_uV != -ENODATA) &&
 	    (uc_pdata->max_uV != -ENODATA) &&