[U-Boot] [PATCH v1 1/7] dm: regulator: support regulator more state

[Elaine Zhang <zhangqing@rock-chips.com>]

From: Joseph Chen <chenjh@rock-chips.com>

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>
---
 drivers/power/regulator/regulator-uclass.c | 67 ++++++++++++++++++++++++++++++
 include/power/regulator.h                  | 42 +++++++++++++++++++
 2 files changed, 109 insertions(+)

diff --git a/drivers/power/regulator/regulator-uclass.c b/drivers/power/regulator/regulator-uclass.c
index 76be95bcd159..972a5b210c3c 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 || !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 || !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 || !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 || !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 +282,11 @@ 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 (!uc_pdata->always_on && !uc_pdata->boot_on)
 		return -EMEDIUMTYPE;
 
@@ -243,6 +295,8 @@ 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 +417,7 @@ 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 +428,8 @@ 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 +439,16 @@ 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_uA;
+	} else {
+		uc_pdata->suspend_on = true;
+		uc_pdata->suspend_uV = uc_pdata->max_uA;
+	}
+
 	/* Those values are optional (-ENODATA if unset) */
 	if ((uc_pdata->min_uV != -ENODATA) &&
 	    (uc_pdata->max_uV != -ENODATA) &&
diff --git a/include/power/regulator.h b/include/power/regulator.h
index 6c6e2cd4f996..64c5108950a0 100644
--- a/include/power/regulator.h
+++ b/include/power/regulator.h
@@ -168,6 +168,7 @@ struct dm_regulator_uclass_platdata {
 	int mode_count;
 	int min_uV;
 	int max_uV;
+	int init_uV;
 	int min_uA;
 	int max_uA;
 	unsigned int ramp_delay;
@@ -177,6 +178,8 @@ struct dm_regulator_uclass_platdata {
 	int flags;
 	u8 ctrl_reg;
 	u8 volt_reg;
+	bool suspend_on;
+	u32 suspend_uV;
 };
 
 /* Regulator device operations */
@@ -192,6 +195,8 @@ struct dm_regulator_ops {
 	 */
 	int (*get_value)(struct udevice *dev);
 	int (*set_value)(struct udevice *dev, int uV);
+	int (*set_suspend_value)(struct udevice *dev, int uV);
+	int (*get_suspend_value)(struct udevice *dev);
 
 	/**
 	 * The regulator output current function calls operates on a micro Amps.
@@ -216,6 +221,8 @@ struct dm_regulator_ops {
 	 */
 	int (*get_enable)(struct udevice *dev);
 	int (*set_enable)(struct udevice *dev, bool enable);
+	int (*set_suspend_enable)(struct udevice *dev, bool enable);
+	int (*get_suspend_enable)(struct udevice *dev);
 
 	/**
 	 * The 'get/set_mode()' function calls should operate on a driver-
@@ -262,6 +269,23 @@ int regulator_get_value(struct udevice *dev);
 int regulator_set_value(struct udevice *dev, int uV);
 
 /**
+ * regulator_set_suspend_value: set the suspend microvoltage value of a given regulator.
+ *
+ * @dev    - pointer to the regulator device
+ * @uV     - the output suspend value to set [micro Volts]
+ * @return - 0 on success or -errno val if fails
+ */
+int regulator_set_suspend_value(struct udevice *dev, int uV);
+
+/**
+ * regulator_get_suspend_value: get the suspend microvoltage value of a given regulator.
+ *
+ * @dev    - pointer to the regulator device
+ * @return - positive output value [uV] on success or negative errno if fail.
+ */
+int regulator_get_suspend_value(struct udevice *dev);
+
+/**
  * regulator_set_value_force: set the microvoltage value of a given regulator
  *			      without any min-,max condition check
  *
@@ -317,6 +341,24 @@ int regulator_set_enable(struct udevice *dev, bool enable);
 int regulator_set_enable_if_allowed(struct udevice *dev, bool enable);
 
 /**
+ * regulator_set_suspend_enable: set regulator suspend enable state
+ *
+ * @dev    - pointer to the regulator device
+ * @enable - set true or false
+ * @return - 0 on success or -errno val if fails
+ */
+int regulator_set_suspend_enable(struct udevice *dev, bool enable);
+
+
+/**
+ * regulator_get_suspend_enable: get regulator suspend enable state
+ *
+ * @dev    - pointer to the regulator device
+ * @return - 0 on success or -errno val if fails
+ */
+int regulator_get_suspend_enable(struct udevice *dev);
+
+/**
  * regulator_get_mode: get active operation mode id of a given regulator
  *
  * @dev    - pointer to the regulator device
-- 
1.9.1