#include <linux/cleanup.h>
#include <linux/completion.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/hwmon.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regmap.h>
#define TPS65185_REG_TMST_VALUE 0
#define TPS65185_REG_ENABLE 1
#define TPS65185_REG_VADJ 2
#define TPS65185_REG_VCOM1 3
#define TPS65185_REG_VCOM2 4
#define TPS65185_REG_INT_EN1 5
#define TPS65185_REG_INT_EN2 6
#define TPS65185_REG_INT1 7
#define TPS65185_REG_INT2 8
#define TPS65185_REG_TMST1 0xd
#define TPS65185_REG_TMST2 0xe
#define TPS65185_REG_PG 0xf
#define TPS65185_REG_REVID 0x10
#define TPS65185_READ_THERM BIT(7)
#define TPS65185_CONV_END BIT(5)
#define TPS65185_ENABLE_ACTIVE BIT(7)
#define TPS65185_ENABLE_STANDBY BIT(6)
#define PGOOD_TIMEOUT_MSECS 200
struct tps65185_data {
struct device *dev;
struct regmap *regmap;
struct gpio_desc *pgood_gpio;
struct gpio_desc *pwrup_gpio;
struct gpio_desc *vcom_ctrl_gpio;
struct gpio_desc *wakeup_gpio;
struct completion pgood_completion;
int pgood_irq;
struct completion tmst_completion;
};
static const struct hwmon_channel_info *tps65185_info[] = {
HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
NULL
};
static int tps65185_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *temp)
{
struct tps65185_data *data = dev_get_drvdata(dev);
unsigned int val;
int ret;
reinit_completion(&data->tmst_completion);
regmap_update_bits(data->regmap, TPS65185_REG_TMST1,
TPS65185_READ_THERM, TPS65185_READ_THERM);
wait_for_completion_timeout(&data->tmst_completion,
msecs_to_jiffies(PGOOD_TIMEOUT_MSECS));
ret = regmap_read(data->regmap, TPS65185_REG_TMST1, &val);
if (!(val & TPS65185_CONV_END))
return -ETIMEDOUT;
ret = regmap_read(data->regmap, TPS65185_REG_TMST_VALUE, &val);
if (ret)
return ret;
*temp = (s8)val * 1000;
return 0;
}
static umode_t tps65185_hwmon_is_visible(const void *data,
enum hwmon_sensor_types type,
u32 attr, int channel)
{
return 0444;
}
static const struct hwmon_ops tps65185_hwmon_ops = {
.is_visible = tps65185_hwmon_is_visible,
.read = tps65185_hwmon_read,
};
static const struct hwmon_chip_info tps65185_chip_info = {
.ops = &tps65185_hwmon_ops,
.info = tps65185_info,
};
static bool tps65185_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case TPS65185_REG_TMST_VALUE:
case TPS65185_REG_ENABLE:
case TPS65185_REG_VCOM2:
case TPS65185_REG_INT1:
case TPS65185_REG_INT2:
case TPS65185_REG_TMST1:
return true;
default:
return false;
}
}
static const struct regmap_config regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x10,
.cache_type = REGCACHE_MAPLE,
.volatile_reg = tps65185_volatile_reg,
};
static const struct regulator_ops tps65185_v3p3ops = {
.list_voltage = regulator_list_voltage_linear,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static int tps65185_check_powergood(struct regulator_dev *rdev)
{
struct tps65185_data *data = rdev_get_drvdata(rdev);
return gpiod_get_value_cansleep(data->pgood_gpio);
}
static int tps65185_vposneg_get_voltage_sel(struct regulator_dev *rdev)
{
int ret;
ret = regulator_get_voltage_sel_regmap(rdev);
if (ret < 0)
return ret;
return 6 - ret;
}
static int tps65185_vposneg_set_voltage_sel(struct regulator_dev *rdev, unsigned int selector)
{
return regulator_set_voltage_sel_regmap(rdev, 6 - selector);
}
static irqreturn_t pgood_handler(int irq, void *dev_id)
{
struct tps65185_data *data = dev_id;
complete(&data->pgood_completion);
return IRQ_HANDLED;
}
static int tps65185_vposneg_enable(struct regulator_dev *rdev)
{
struct tps65185_data *data = rdev_get_drvdata(rdev);
int ret;
reinit_completion(&data->pgood_completion);
if (data->pwrup_gpio)
ret = gpiod_set_value_cansleep(data->pwrup_gpio, 1);
else
ret = regmap_update_bits(data->regmap, TPS65185_REG_ENABLE,
TPS65185_ENABLE_ACTIVE,
TPS65185_ENABLE_ACTIVE);
if (ret)
return ret;
dev_dbg(data->dev, "turning on...");
wait_for_completion_timeout(&data->pgood_completion,
msecs_to_jiffies(PGOOD_TIMEOUT_MSECS));
dev_dbg(data->dev, "turned on");
if (gpiod_get_value_cansleep(data->pgood_gpio) != 1)
return -ETIMEDOUT;
return 0;
}
static int tps65185_vposneg_disable(struct regulator_dev *rdev)
{
struct tps65185_data *data = rdev_get_drvdata(rdev);
int ret;
if (data->pwrup_gpio)
ret = gpiod_set_value_cansleep(data->pwrup_gpio, 0);
else
ret = regmap_update_bits(data->regmap, TPS65185_REG_ENABLE,
TPS65185_ENABLE_STANDBY,
TPS65185_ENABLE_STANDBY);
return ret;
}
static int tps65185_vcom_set_voltage_sel(struct regulator_dev *rdev, unsigned int selector)
{
struct tps65185_data *data = rdev_get_drvdata(rdev);
int ret;
ret = regmap_update_bits(data->regmap, TPS65185_REG_VCOM2, BIT(0), selector >> 8);
if (ret < 0)
return ret;
return regmap_write(data->regmap, TPS65185_REG_VCOM1, selector & 0xFF);
}
static int tps65185_vcom_get_voltage_sel(struct regulator_dev *rdev)
{
struct tps65185_data *data = rdev_get_drvdata(rdev);
int ret;
unsigned int sel, sel2;
ret = regmap_read(data->regmap, TPS65185_REG_VCOM1, &sel);
if (ret < 0)
return ret;
ret = regmap_read(data->regmap, TPS65185_REG_VCOM2, &sel2);
if (ret < 0)
return ret;
if (sel2 & BIT(0))
sel |= 0x100;
return sel;
}
static const struct regulator_ops tps65185_vcom_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.set_voltage_sel = tps65185_vcom_set_voltage_sel,
.get_voltage_sel = tps65185_vcom_get_voltage_sel,
};
static const struct regulator_ops tps65185_vposneg_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.enable = tps65185_vposneg_enable,
.disable = tps65185_vposneg_disable,
.is_enabled = tps65185_check_powergood,
.set_voltage_sel = tps65185_vposneg_set_voltage_sel,
.get_voltage_sel = tps65185_vposneg_get_voltage_sel,
};
static const struct regulator_desc regulators[] = {
{
.name = "v3p3",
.of_match = of_match_ptr("v3p3"),
.regulators_node = of_match_ptr("regulators"),
.id = 0,
.ops = &tps65185_v3p3ops,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.enable_reg = TPS65185_REG_ENABLE,
.enable_mask = BIT(5),
.n_voltages = 1,
.min_uV = 3300000,
},
{
.name = "vposneg",
.of_match = of_match_ptr("vposneg"),
.regulators_node = of_match_ptr("regulators"),
.id = 1,
.ops = &tps65185_vposneg_ops,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.n_voltages = 4,
.vsel_reg = TPS65185_REG_VADJ,
.vsel_mask = 0x7,
.min_uV = 14250000,
.uV_step = 250000,
}
};
static const struct regulator_desc vcom_regulator_desc = {
.name = "vcom",
.of_match = of_match_ptr("vcom"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "vposneg",
.id = 2,
.ops = &tps65185_vcom_ops,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.n_voltages = 511,
.min_uV = 0,
.uV_step = 10000,
};
static irqreturn_t tps65185_irq_thread(int irq, void *dev_id)
{
struct tps65185_data *data = dev_id;
unsigned int int_status_1, int_status_2;
int ret;
ret = regmap_read(data->regmap, TPS65185_REG_INT1, &int_status_1);
if (ret)
return IRQ_NONE;
ret = regmap_read(data->regmap, TPS65185_REG_INT2, &int_status_2);
if (ret)
return IRQ_NONE;
if (int_status_2 & BIT(0))
complete(&data->tmst_completion);
dev_dbg(data->dev, "irq status %02x %02x\n", int_status_1, int_status_2);
if (int_status_1 || int_status_2)
return IRQ_HANDLED;
return IRQ_NONE;
}
static int tps65185_probe(struct i2c_client *client)
{
struct tps65185_data *data;
struct regulator_config config = { };
struct regulator_dev *rdev;
int ret = 0;
int i;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->regmap = devm_regmap_init_i2c(client, ®map_config);
if (IS_ERR(data->regmap))
return dev_err_probe(&client->dev, PTR_ERR(data->regmap),
"failed to allocate regmap!\n");
data->pgood_gpio = devm_gpiod_get(&client->dev, "pwr-good", GPIOD_IN);
if (IS_ERR(data->pgood_gpio))
return dev_err_probe(&client->dev,
PTR_ERR(data->pgood_gpio),
"failed to get power good gpio\n");
data->pgood_irq = gpiod_to_irq(data->pgood_gpio);
if (data->pgood_irq < 0)
return data->pgood_irq;
data->pwrup_gpio = devm_gpiod_get_optional(&client->dev, "enable", GPIOD_OUT_LOW);
if (IS_ERR(data->pwrup_gpio))
return dev_err_probe(&client->dev, PTR_ERR(data->pwrup_gpio),
"failed to get pwrup gpio\n");
data->wakeup_gpio = devm_gpiod_get_optional(&client->dev, "wakeup", GPIOD_OUT_HIGH);
if (IS_ERR(data->wakeup_gpio))
return dev_err_probe(&client->dev,
PTR_ERR(data->wakeup_gpio),
"failed to get wakeup gpio\n");
data->vcom_ctrl_gpio = devm_gpiod_get_optional(&client->dev, "vcom-ctrl", GPIOD_OUT_LOW);
if (IS_ERR(data->vcom_ctrl_gpio))
return dev_err_probe(&client->dev,
PTR_ERR(data->vcom_ctrl_gpio),
"failed to get vcm ctrl gpio\n");
ret = devm_regulator_get_enable(&client->dev, "vin");
if (ret)
return dev_err_probe(&client->dev, ret,
"failed to get vin regulator\n");
data->dev = &client->dev;
i2c_set_clientdata(client, data);
init_completion(&data->pgood_completion);
init_completion(&data->tmst_completion);
ret = devm_request_threaded_irq(&client->dev, data->pgood_irq, NULL,
pgood_handler,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"PGOOD", data);
if (ret)
return dev_err_probe(&client->dev, ret,
"failed to request power good irq\n");
if (client->irq) {
ret = devm_request_threaded_irq(&client->dev, client->irq,
NULL, tps65185_irq_thread,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"tps65185", data);
if (ret)
return dev_err_probe(&client->dev, ret,
"failed to request irq\n");
}
ret = regmap_update_bits(data->regmap, TPS65185_REG_INT_EN2, BIT(0), BIT(0));
if (ret)
return dev_err_probe(&client->dev, ret,
"failed to enable temp irq\n");
config.driver_data = data;
config.dev = &client->dev;
config.regmap = data->regmap;
for (i = 0; i < ARRAY_SIZE(regulators); i++) {
rdev = devm_regulator_register(&client->dev, ®ulators[i],
&config);
if (IS_ERR(rdev))
return dev_err_probe(&client->dev, PTR_ERR(rdev),
"failed to register %s regulator\n",
regulators[i].name);
}
config.ena_gpiod = data->vcom_ctrl_gpio;
rdev = devm_regulator_register(&client->dev, &vcom_regulator_desc, &config);
if (IS_ERR(rdev))
return dev_err_probe(&client->dev, PTR_ERR(rdev),
"failed to register vcom regulator\n");
if (IS_REACHABLE(CONFIG_HWMON)) {
struct device *hwmon_dev;
hwmon_dev = devm_hwmon_device_register_with_info(&client->dev, "tps65185", data,
&tps65185_chip_info, NULL);
if (IS_ERR(hwmon_dev))
dev_notice(&client->dev, "failed to register hwmon\n");
}
return 0;
}
static const struct of_device_id tps65185_dt_ids[] = {
{
.compatible = "ti,tps65185",
}, {
}
};
MODULE_DEVICE_TABLE(of, tps65185_dt_ids);
static struct i2c_driver tps65185_i2c_driver = {
.driver = {
.name = "tps65185",
.of_match_table = tps65185_dt_ids,
},
.probe = tps65185_probe,
};
module_i2c_driver(tps65185_i2c_driver);
MODULE_DESCRIPTION("TPS65185 regulator driver");
MODULE_LICENSE("GPL");
