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Date: Fri, 23 Oct 2020 16:19:22 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Andy Gross <agross@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Jonathan Marek <jonathan@...ek.ca>,
Stephen Boyd <sboyd@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>
Cc: linux-arm-msm@...r.kernel.org,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/5] regulator: fixed: support using power domain for enable/disable
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@...aro.org>
---
drivers/regulator/fixed.c | 63 +++++++++++++++++++++++++++++++++++----
1 file changed, 57 insertions(+), 6 deletions(-)
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 3de7709bdcd4..02ad83153e19 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -18,6 +18,8 @@
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_opp.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/fixed.h>
#include <linux/gpio/consumer.h>
@@ -34,11 +36,13 @@ struct fixed_voltage_data {
struct regulator_dev *dev;
struct clk *enable_clock;
- unsigned int clk_enable_counter;
+ unsigned int enable_counter;
+ int performance_state;
};
struct fixed_dev_type {
bool has_enable_clock;
+ bool has_performance_state;
};
static int reg_clock_enable(struct regulator_dev *rdev)
@@ -50,7 +54,7 @@ static int reg_clock_enable(struct regulator_dev *rdev)
if (ret)
return ret;
- priv->clk_enable_counter++;
+ priv->enable_counter++;
return ret;
}
@@ -60,16 +64,41 @@ static int reg_clock_disable(struct regulator_dev *rdev)
struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
clk_disable_unprepare(priv->enable_clock);
- priv->clk_enable_counter--;
+ priv->enable_counter--;
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;
- return priv->clk_enable_counter > 0;
+ 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);
+
+ 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 = {
.enable = reg_clock_enable,
.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)
@@ -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");
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 {
drvdata->desc.ops = &fixed_voltage_ops;
}
@@ -260,6 +303,10 @@ static const struct fixed_dev_type fixed_clkenable_data = {
.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[] = {
{
.compatible = "regulator-fixed",
@@ -269,6 +316,10 @@ static const struct of_device_id fixed_of_match[] = {
.compatible = "regulator-fixed-clock",
.data = &fixed_clkenable_data,
},
+ {
+ .compatible = "regulator-fixed-domain",
+ .data = &fixed_domain_data,
+ },
{
},
};
--
2.28.0
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