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#include <linux/delay.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/devinfo.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#define MAX_NUM_REGULATORS 8
static struct vreg {
const char *name;
unsigned int load_uA;
} vregs [MAX_NUM_REGULATORS] = {
/* 2.0 V */
{ "vddpcie2", 15000 },
{ "vddrfa3", 400000 },
/* 0.95 V */
{ "vddaon", 100000 },
{ "vddpmu", 1250000 },
{ "vddrfa1", 200000 },
/* 1.35 V */
{ "vddrfa2", 400000 },
{ "vddpcie1", 35000 },
/* 1.8 V */
{ "vddio", 20000 },
};
struct qca639x_data {
struct regulator_bulk_data regulators[MAX_NUM_REGULATORS];
size_t num_vregs;
struct device *dev;
struct pinctrl_state *active_state;
struct generic_pm_domain pd;
};
#define domain_to_data(domain) container_of(domain, struct qca639x_data, pd)
static int qca639x_power_on(struct generic_pm_domain *domain)
{
struct qca639x_data *data = domain_to_data(domain);
int ret;
dev_warn(&domain->dev, "DUMMY POWER ON\n");
ret = regulator_bulk_enable(data->num_vregs, data->regulators);
if (ret) {
dev_err(data->dev, "Failed to enable regulators");
return ret;
}
/* Wait for 1ms before toggling enable pins. */
msleep(1);
ret = pinctrl_select_state(data->dev->pins->p, data->active_state);
if (ret) {
dev_err(data->dev, "Failed to select active state");
return ret;
}
/* Wait for all power levels to stabilize */
msleep(6);
return 0;
}
static int qca639x_power_off(struct generic_pm_domain *domain)
{
struct qca639x_data *data = domain_to_data(domain);
dev_warn(&domain->dev, "DUMMY POWER OFF\n");
pinctrl_select_default_state(data->dev);
regulator_bulk_disable(data->num_vregs, data->regulators);
return 0;
}
static int qca639x_probe(struct platform_device *pdev)
{
struct qca639x_data *data;
struct device *dev = &pdev->dev;
int i, ret;
if (!dev->pins || IS_ERR_OR_NULL(dev->pins->default_state))
return -EINVAL;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->dev = dev;
data->num_vregs = ARRAY_SIZE(vregs);
data->active_state = pinctrl_lookup_state(dev->pins->p, "active");
if (IS_ERR(data->active_state)) {
ret = PTR_ERR(data->active_state);
dev_err(dev, "Failed to get active_state: %d\n", ret);
return ret;
}
for (i = 0; i < data->num_vregs; i++)
data->regulators[i].supply = vregs[i].name;
ret = devm_regulator_bulk_get(dev, data->num_vregs, data->regulators);
if (ret < 0)
return ret;
for (i = 0; i < data->num_vregs; i++) {
ret = regulator_set_load(data->regulators[i].consumer, vregs[i].load_uA);
if (ret)
return ret;
}
data->pd.name = dev_name(dev);
data->pd.power_on = qca639x_power_on;
data->pd.power_off = qca639x_power_off;
ret = pm_genpd_init(&data->pd, NULL, true);
if (ret < 0)
return ret;
ret = of_genpd_add_provider_simple(dev->of_node, &data->pd);
if (ret < 0) {
pm_genpd_remove(&data->pd);
return ret;
}
platform_set_drvdata(pdev, data);
return 0;
}
static int qca639x_remove(struct platform_device *pdev)
{
struct qca639x_data *data = platform_get_drvdata(pdev);
pm_genpd_remove(&data->pd);
return 0;
}
static const struct of_device_id qca639x_of_match[] = {
{ .compatible = "qcom,qca639x" },
};
static struct platform_driver qca639x_driver = {
.probe = qca639x_probe,
.remove = qca639x_remove,
.driver = {
.name = "qca639x",
.of_match_table = qca639x_of_match,
},
};
module_platform_driver(qca639x_driver);
MODULE_LICENSE("GPL v2");
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