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-rw-r--r--drivers/regulator/arizona-ldo1.c4
-rw-r--r--drivers/regulator/arizona-micsupp.c5
-rw-r--r--drivers/regulator/core.c126
-rw-r--r--drivers/regulator/wm831x-ldo.c8
4 files changed, 143 insertions, 0 deletions
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index c8f95c07adb..80e012f1416 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -39,6 +39,8 @@ static struct regulator_ops arizona_ldo1_ops = {
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_bypass = regulator_get_bypass_regmap,
+ .set_bypass = regulator_set_bypass_regmap,
};
static const struct regulator_desc arizona_ldo1 = {
@@ -49,6 +51,8 @@ static const struct regulator_desc arizona_ldo1 = {
.vsel_reg = ARIZONA_LDO1_CONTROL_1,
.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
+ .bypass_reg = ARIZONA_LDO1_CONTROL_1,
+ .bypass_mask = ARIZONA_LDO1_BYPASS,
.min_uV = 900000,
.uV_step = 50000,
.n_voltages = 7,
diff --git a/drivers/regulator/arizona-micsupp.c b/drivers/regulator/arizona-micsupp.c
index 450a069aa9b..d9b1f82cc5b 100644
--- a/drivers/regulator/arizona-micsupp.c
+++ b/drivers/regulator/arizona-micsupp.c
@@ -82,6 +82,9 @@ static struct regulator_ops arizona_micsupp_ops = {
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
+
+ .get_bypass = regulator_get_bypass_regmap,
+ .set_bypass = regulator_set_bypass_regmap,
};
static const struct regulator_desc arizona_micsupp = {
@@ -95,6 +98,8 @@ static const struct regulator_desc arizona_micsupp = {
.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
.enable_mask = ARIZONA_CPMIC_ENA,
+ .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
+ .bypass_mask = ARIZONA_CPMIC_BYPASS,
.owner = THIS_MODULE,
};
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 48385318175..419805cdd9d 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -77,6 +77,7 @@ struct regulator {
struct device *dev;
struct list_head list;
unsigned int always_on:1;
+ unsigned int bypass:1;
int uA_load;
int min_uV;
int max_uV;
@@ -394,6 +395,9 @@ static ssize_t regulator_status_show(struct device *dev,
case REGULATOR_STATUS_STANDBY:
label = "standby";
break;
+ case REGULATOR_STATUS_BYPASS:
+ label = "bypass";
+ break;
case REGULATOR_STATUS_UNDEFINED:
label = "undefined";
break;
@@ -585,6 +589,27 @@ static ssize_t regulator_suspend_standby_state_show(struct device *dev,
static DEVICE_ATTR(suspend_standby_state, 0444,
regulator_suspend_standby_state_show, NULL);
+static ssize_t regulator_bypass_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = dev_get_drvdata(dev);
+ const char *report;
+ bool bypass;
+ int ret;
+
+ ret = rdev->desc->ops->get_bypass(rdev, &bypass);
+
+ if (ret != 0)
+ report = "unknown";
+ else if (bypass)
+ report = "enabled";
+ else
+ report = "disabled";
+
+ return sprintf(buf, "%s\n", report);
+}
+static DEVICE_ATTR(bypass, 0444,
+ regulator_bypass_show, NULL);
/*
* These are the only attributes are present for all regulators.
@@ -2674,6 +2699,100 @@ out:
EXPORT_SYMBOL_GPL(regulator_set_optimum_mode);
/**
+ * regulator_set_bypass_regmap - Default set_bypass() using regmap
+ *
+ * @rdev: device to operate on.
+ * @enable: state to set.
+ */
+int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable)
+{
+ unsigned int val;
+
+ if (enable)
+ val = rdev->desc->bypass_mask;
+ else
+ val = 0;
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->bypass_reg,
+ rdev->desc->bypass_mask, val);
+}
+EXPORT_SYMBOL_GPL(regulator_set_bypass_regmap);
+
+/**
+ * regulator_get_bypass_regmap - Default get_bypass() using regmap
+ *
+ * @rdev: device to operate on.
+ * @enable: current state.
+ */
+int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
+ if (ret != 0)
+ return ret;
+
+ *enable = val & rdev->desc->bypass_mask;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);
+
+/**
+ * regulator_allow_bypass - allow the regulator to go into bypass mode
+ *
+ * @regulator: Regulator to configure
+ * @allow: enable or disable bypass mode
+ *
+ * Allow the regulator to go into bypass mode if all other consumers
+ * for the regulator also enable bypass mode and the machine
+ * constraints allow this. Bypass mode means that the regulator is
+ * simply passing the input directly to the output with no regulation.
+ */
+int regulator_allow_bypass(struct regulator *regulator, bool enable)
+{
+ struct regulator_dev *rdev = regulator->rdev;
+ int ret = 0;
+
+ if (!rdev->desc->ops->set_bypass)
+ return 0;
+
+ if (rdev->constraints &&
+ !(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_BYPASS))
+ return 0;
+
+ mutex_lock(&rdev->mutex);
+
+ if (enable && !regulator->bypass) {
+ rdev->bypass_count++;
+
+ if (rdev->bypass_count == rdev->open_count) {
+ ret = rdev->desc->ops->set_bypass(rdev, enable);
+ if (ret != 0)
+ rdev->bypass_count--;
+ }
+
+ } else if (!enable && regulator->bypass) {
+ rdev->bypass_count--;
+
+ if (rdev->bypass_count != rdev->open_count) {
+ ret = rdev->desc->ops->set_bypass(rdev, enable);
+ if (ret != 0)
+ rdev->bypass_count++;
+ }
+ }
+
+ if (ret == 0)
+ regulator->bypass = enable;
+
+ mutex_unlock(&rdev->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regulator_allow_bypass);
+
+/**
* regulator_register_notifier - register regulator event notifier
* @regulator: regulator source
* @nb: notifier block
@@ -3036,6 +3155,11 @@ static int add_regulator_attributes(struct regulator_dev *rdev)
if (status < 0)
return status;
}
+ if (ops->get_bypass) {
+ status = device_create_file(dev, &dev_attr_bypass);
+ if (status < 0)
+ return status;
+ }
/* some attributes are type-specific */
if (rdev->desc->type == REGULATOR_CURRENT) {
@@ -3124,6 +3248,8 @@ static void rdev_init_debugfs(struct regulator_dev *rdev)
&rdev->use_count);
debugfs_create_u32("open_count", 0444, rdev->debugfs,
&rdev->open_count);
+ debugfs_create_u32("bypass_count", 0444, rdev->debugfs,
+ &rdev->bypass_count);
}
/**
diff --git a/drivers/regulator/wm831x-ldo.c b/drivers/regulator/wm831x-ldo.c
index 5cb70ca1e98..f203a972ded 100644
--- a/drivers/regulator/wm831x-ldo.c
+++ b/drivers/regulator/wm831x-ldo.c
@@ -237,6 +237,8 @@ static struct regulator_ops wm831x_gp_ldo_ops = {
.set_mode = wm831x_gp_ldo_set_mode,
.get_status = wm831x_gp_ldo_get_status,
.get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
+ .get_bypass = regulator_get_bypass_regmap,
+ .set_bypass = regulator_set_bypass_regmap,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
@@ -293,6 +295,8 @@ static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev)
ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
ldo->desc.enable_reg = WM831X_LDO_ENABLE;
ldo->desc.enable_mask = 1 << id;
+ ldo->desc.bypass_reg = ldo->base;
+ ldo->desc.bypass_mask = WM831X_LDO1_SWI;
config.dev = pdev->dev.parent;
if (pdata)
@@ -488,6 +492,8 @@ static struct regulator_ops wm831x_aldo_ops = {
.get_mode = wm831x_aldo_get_mode,
.set_mode = wm831x_aldo_set_mode,
.get_status = wm831x_aldo_get_status,
+ .set_bypass = regulator_set_bypass_regmap,
+ .get_bypass = regulator_get_bypass_regmap,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
@@ -544,6 +550,8 @@ static __devinit int wm831x_aldo_probe(struct platform_device *pdev)
ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
ldo->desc.enable_reg = WM831X_LDO_ENABLE;
ldo->desc.enable_mask = 1 << id;
+ ldo->desc.bypass_reg = ldo->base;
+ ldo->desc.bypass_mask = WM831X_LDO7_SWI;
config.dev = pdev->dev.parent;
if (pdata)
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-25 09:57:35 +0000