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regulator: fixed: support using power domain for enable/disable

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Adds possibility to choose the compatible "fixed-regulator-domain" for
regulators which use power domain for enabling/disabling corresponding
regulator.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20201023131925.334864-3-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2020-10-23 16:19:22 +03:00 • committed by Mark Brown
parent 01c77cae83
commit bf3a28cf42
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 57 additions and 6 deletions
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63
drivers/regulator/fixed.c
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@ -18,6 +18,8 @@
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_opp.h>
#include <linux/regulator/driver.h> #include <linux/regulator/driver.h>
#include <linux/regulator/fixed.h> #include <linux/regulator/fixed.h>
#include <linux/gpio/consumer.h> #include <linux/gpio/consumer.h>
@ -34,11 +36,13 @@ struct fixed_voltage_data {
struct regulator_dev *dev; struct regulator_dev *dev;
struct clk *enable_clock; struct clk *enable_clock;
unsigned int clk_enable_counter; unsigned int enable_counter;
int performance_state;
}; };
struct fixed_dev_type { struct fixed_dev_type {
bool has_enable_clock; bool has_enable_clock;
bool has_performance_state;
}; };
static int reg_clock_enable(struct regulator_dev *rdev) static int reg_clock_enable(struct regulator_dev *rdev)
@ -50,7 +54,7 @@ static int reg_clock_enable(struct regulator_dev *rdev)
if (ret) if (ret)
return ret; return ret;
priv->clk_enable_counter++; priv->enable_counter++;
return ret; return ret;
} }
@ -60,16 +64,41 @@ static int reg_clock_disable(struct regulator_dev *rdev)
struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
clk_disable_unprepare(priv->enable_clock); clk_disable_unprepare(priv->enable_clock);
priv->clk_enable_counter--; priv->enable_counter--;
return 0; return 0;
} }
static int reg_clock_is_enabled(struct regulator_dev *rdev) static int reg_domain_enable(struct regulator_dev *rdev)
{
struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
struct device *dev = rdev->dev.parent;
int ret;
ret = dev_pm_genpd_set_performance_state(dev, priv->performance_state);
if (ret)
return ret;
priv->enable_counter++;
return ret;
}
static int reg_domain_disable(struct regulator_dev *rdev)
{
struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
struct device *dev = rdev->dev.parent;
priv->enable_counter--;
return dev_pm_genpd_set_performance_state(dev, 0);
}
static int reg_is_enabled(struct regulator_dev *rdev)
{ {
struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
return priv->clk_enable_counter > 0; return priv->enable_counter > 0;
} }
@ -129,7 +158,13 @@ static const struct regulator_ops fixed_voltage_ops = {
static const struct regulator_ops fixed_voltage_clkenabled_ops = { static const struct regulator_ops fixed_voltage_clkenabled_ops = {
.enable = reg_clock_enable, .enable = reg_clock_enable,
.disable = reg_clock_disable, .disable = reg_clock_disable,
.is_enabled = reg_clock_is_enabled, .is_enabled = reg_is_enabled,
};
static const struct regulator_ops fixed_voltage_domain_ops = {
.enable = reg_domain_enable,
.disable = reg_domain_disable,
.is_enabled = reg_is_enabled,
}; };
static int reg_fixed_voltage_probe(struct platform_device *pdev) static int reg_fixed_voltage_probe(struct platform_device *pdev)
@ -177,6 +212,14 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
dev_err(dev, "Can't get enable-clock from devicetree\n"); dev_err(dev, "Can't get enable-clock from devicetree\n");
return -ENOENT; return -ENOENT;
} }
} else if (drvtype && drvtype->has_performance_state) {
drvdata->desc.ops = &fixed_voltage_domain_ops;
drvdata->performance_state = of_get_required_opp_performance_state(dev->of_node, 0);
if (drvdata->performance_state < 0) {
dev_err(dev, "Can't get performance state from devicetree\n");
return drvdata->performance_state;
}
} else { } else {
drvdata->desc.ops = &fixed_voltage_ops; drvdata->desc.ops = &fixed_voltage_ops;
} }
@ -260,6 +303,10 @@ static const struct fixed_dev_type fixed_clkenable_data = {
.has_enable_clock = true, .has_enable_clock = true,
}; };
static const struct fixed_dev_type fixed_domain_data = {
.has_performance_state = true,
};
static const struct of_device_id fixed_of_match[] = { static const struct of_device_id fixed_of_match[] = {
{ {
.compatible = "regulator-fixed", .compatible = "regulator-fixed",
@ -269,6 +316,10 @@ static const struct of_device_id fixed_of_match[] = {
.compatible = "regulator-fixed-clock", .compatible = "regulator-fixed-clock",
.data = &fixed_clkenable_data, .data = &fixed_clkenable_data,
}, },
{
.compatible = "regulator-fixed-domain",
.data = &fixed_domain_data,
},
{ {
}, },
}; };