shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

regulator: rk860x: Add RK860X dcdc support

Browse Source 
RK860X main features:
    - 2.7V to 5.5V Input Voltage Range;
    - 2.4MHz Constant Switching Frequency;
    - 6A Available Load Current;
    - Programmable Output Voltage: 0.7125V to 1.5V in 12.5mV
      Steps(RK8600/RK8601), 0.5V to 1.5V in 6.25mV(RK8602/RK8603);
    - PFM/PWM Operation for Optimum Increased Efficiency;

Change-Id: Ib564dee94151d42c0288d2141c6b66c70bc019b9
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
This commit is contained in:
Elaine Zhang
2021-10-14 16:50:16 +08:00
committed by Tao Huang
parent 4e57d971b6
commit e193e5488c
3 changed files with 605 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/regulator/Kconfig
View File

@@ -760,6 +760,17 @@ config REGULATOR_RK808
through regulator interface. The device supports multiple DCDC/LDO
outputs which can be controlled by i2c communication.
config REGULATOR_RK860X
tristate "Rockchip RK860X Regulator"
depends on I2C
select REGMAP_I2C
help
This driver supports Rockchip RK860X Digitally Programmable
Buck Regulator. The RK860X is a step-down switching voltage
regulator that delivers a digitally programmable output from an
input voltage supply of 2.5V to 5.5V. The output voltage is
programmed through an I2C interface.
config REGULATOR_RN5T618
tristate "Ricoh RN5T567/618 voltage regulators"
depends on MFD_RN5T618

1
drivers/regulator/Makefile
View File

@@ -96,6 +96,7 @@ obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-regulator.o
obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o
obj-$(CONFIG_REGULATOR_RK860X) += rk860x-regulator.o
obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o
obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o
obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o

593
drivers/regulator/rk860x-regulator.c Normal file
View File

@@ -0,0 +1,593 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2021 Fuzhou Rockchip Electronics Co., Ltd
*/
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/param.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
/* Voltage setting */
#define RK860X_VSEL0_A 0x00
#define RK860X_VSEL1_A 0x01
#define RK860X_VSEL0_B 0x06
#define RK860X_VSEL1_B 0x07
#define RK860X_MAX_SET 0x08
/* Control register */
#define RK860X_CONTROL 0x02
/* IC Type */
#define RK860X_ID1 0x03
/* IC mask version */
#define RK860X_ID2 0x04
/* Monitor register */
#define RK860X_MONITOR 0x05
/* VSEL bit definitions */
#define VSEL_BUCK_EN BIT(7)
#define VSEL_MODE BIT(6)
#define VSEL_A_NSEL_MASK 0x3F
#define VSEL_B_NSEL_MASK 0xff
/* Chip ID */
#define DIE_ID 0x0f
#define DIE_REV 0x0f
/* Control bit definitions */
#define CTL_OUTPUT_DISCHG BIT(7)
#define CTL_SLEW_MASK (0x7 << 4)
#define CTL_SLEW_SHIFT 4
#define CTL_RESET BIT(2)
#define RK860X_NVOLTAGES_64 64
#define RK860X_NVOLTAGES_160 160
/* IC Type */
enum {
RK860X_CHIP_ID_00 = 0,
RK860X_CHIP_ID_01,
RK860X_CHIP_ID_02,
RK860X_CHIP_ID_03,
};
struct rk860x_platform_data {
struct regulator_init_data *regulator;
unsigned int slew_rate;
/* Sleep VSEL ID */
unsigned int sleep_vsel_id;
int limit_volt;
struct gpio_desc *vsel_gpio;
};
struct rk860x_device_info {
struct regmap *regmap;
struct device *dev;
struct regulator_desc desc;
struct regulator_dev *rdev;
struct regulator_init_data *regulator;
/* IC Type and Rev */
int chip_id;
/* Voltage setting register */
unsigned int vol_reg;
unsigned int sleep_reg;
unsigned int en_reg;
unsigned int sleep_en_reg;
unsigned int mode_reg;
unsigned int vol_mask;
unsigned int mode_mask;
unsigned int slew_reg;
unsigned int slew_mask;
unsigned int slew_shift;
/* Voltage range and step(linear) */
unsigned int vsel_min;
unsigned int vsel_step;
unsigned int n_voltages;
/* Voltage slew rate limiting */
unsigned int slew_rate;
struct gpio_desc *vsel_gpio;
unsigned int sleep_vsel_id;
};
static unsigned int rk860x_map_mode(unsigned int mode)
{
return mode == REGULATOR_MODE_FAST ?
REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
}
static int rk860x_get_voltage(struct regulator_dev *rdev)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
unsigned int val;
int ret;
ret = regmap_read(di->regmap, RK860X_MAX_SET, &val);
if (ret < 0)
return ret;
ret = regulator_get_voltage_sel_regmap(rdev);
if (ret > val)
return val;
return ret;
}
static int rk860x_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
int ret;
ret = regulator_map_voltage_linear(rdev, uV, uV);
if (ret < 0)
return ret;
ret = regmap_update_bits(di->regmap, di->sleep_reg,
di->vol_mask, ret);
if (ret < 0)
return ret;
return 0;
}
static int rk860x_set_suspend_enable(struct regulator_dev *rdev)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
return regmap_update_bits(di->regmap, di->sleep_en_reg,
VSEL_BUCK_EN, VSEL_BUCK_EN);
}
static int rk860x_set_suspend_disable(struct regulator_dev *rdev)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
return regmap_update_bits(di->regmap, di->sleep_en_reg,
VSEL_BUCK_EN, 0);
}
static int rk860x_resume(struct regulator_dev *rdev)
{
int ret;
if (!rdev->constraints->state_mem.changeable)
return 0;
ret = rk860x_set_suspend_enable(rdev);
if (ret)
return ret;
return regulator_suspend_enable(rdev, PM_SUSPEND_MEM);
}
static int rk860x_set_enable(struct regulator_dev *rdev)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
if (di->vsel_gpio) {
gpiod_set_raw_value(di->vsel_gpio, !di->sleep_vsel_id);
return 0;
}
return regmap_update_bits(di->regmap, di->en_reg,
VSEL_BUCK_EN, VSEL_BUCK_EN);
}
static int rk860x_set_disable(struct regulator_dev *rdev)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
if (di->vsel_gpio) {
gpiod_set_raw_value(di->vsel_gpio, di->sleep_vsel_id);
return 0;
}
return regmap_update_bits(di->regmap, di->en_reg,
VSEL_BUCK_EN, 0);
}
static int rk860x_is_enabled(struct regulator_dev *rdev)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
unsigned int val;
int ret = 0;
if (di->vsel_gpio) {
if (di->sleep_vsel_id)
return !gpiod_get_raw_value(di->vsel_gpio);
else
return gpiod_get_raw_value(di->vsel_gpio);
}
ret = regmap_read(di->regmap, di->en_reg, &val);
if (ret < 0)
return ret;
if (val & VSEL_BUCK_EN)
return 1;
else
return 0;
}
static int rk860x_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
switch (mode) {
case REGULATOR_MODE_FAST:
regmap_update_bits(di->regmap, di->mode_reg,
di->mode_mask, di->mode_mask);
break;
case REGULATOR_MODE_NORMAL:
regmap_update_bits(di->regmap, di->mode_reg, di->mode_mask, 0);
break;
default:
return -EINVAL;
}
return 0;
}
static unsigned int rk860x_get_mode(struct regulator_dev *rdev)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
unsigned int val;
int ret = 0;
ret = regmap_read(di->regmap, di->mode_reg, &val);
if (ret < 0)
return ret;
if (val & di->mode_mask)
return REGULATOR_MODE_FAST;
else
return REGULATOR_MODE_NORMAL;
}
static const int slew_rates[] = {
64000,
32000,
16000,
8000,
4000,
2000,
1000,
500,
};
static int rk860x_set_ramp(struct regulator_dev *rdev, int ramp)
{
struct rk860x_device_info *di = rdev_get_drvdata(rdev);
int regval = -1, i;
const int *slew_rate_t;
int slew_rate_n;
slew_rate_t = slew_rates;
slew_rate_n = ARRAY_SIZE(slew_rates);
for (i = 0; i < slew_rate_n; i++) {
if (ramp <= slew_rate_t[i])
regval = i;
else
break;
}
if (regval < 0) {
dev_err(di->dev, "unsupported ramp value %d\n", ramp);
return -EINVAL;
}
return regmap_update_bits(di->regmap, di->slew_reg,
di->slew_mask, regval << di->slew_shift);
}
static const struct regulator_ops rk860x_regulator_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = rk860x_get_voltage,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.map_voltage = regulator_map_voltage_linear,
.list_voltage = regulator_list_voltage_linear,
.set_suspend_voltage = rk860x_set_suspend_voltage,
.enable = rk860x_set_enable,
.disable = rk860x_set_disable,
.is_enabled = rk860x_is_enabled,
.set_mode = rk860x_set_mode,
.get_mode = rk860x_get_mode,
.set_ramp_delay = rk860x_set_ramp,
.set_suspend_enable = rk860x_set_suspend_enable,
.set_suspend_disable = rk860x_set_suspend_disable,
.resume = rk860x_resume,
};
/* For 00,01 options:
* VOUT = 0.7125V + NSELx * 12.5mV, from 0.7125 to 1.5V.
* For 02,03 options:
* VOUT = 0.5V + NSELx * 6.25mV, from 0.5 to 1.5V.
*/
static int rk860x_device_setup(struct rk860x_device_info *di,
struct rk860x_platform_data *pdata)
{
int ret = 0;
u32 val = 0;
switch (di->chip_id) {
case RK860X_CHIP_ID_00:
case RK860X_CHIP_ID_01:
di->vsel_min = 712500;
di->vsel_step = 12500;
di->n_voltages = RK860X_NVOLTAGES_64;
di->vol_mask = VSEL_A_NSEL_MASK;
if (di->sleep_vsel_id) {
di->sleep_reg = RK860X_VSEL1_A;
di->vol_reg = RK860X_VSEL0_A;
di->mode_reg = RK860X_VSEL0_A;
di->en_reg = RK860X_VSEL0_A;
di->sleep_en_reg = RK860X_VSEL1_A;
} else {
di->sleep_reg = RK860X_VSEL0_A;
di->vol_reg = RK860X_VSEL1_A;
di->mode_reg = RK860X_VSEL1_A;
di->en_reg = RK860X_VSEL1_A;
di->sleep_en_reg = RK860X_VSEL0_A;
}
break;
case RK860X_CHIP_ID_02:
case RK860X_CHIP_ID_03:
di->vsel_min = 500000;
di->vsel_step = 6250;
di->n_voltages = RK860X_NVOLTAGES_160;
di->vol_mask = VSEL_B_NSEL_MASK;
if (di->sleep_vsel_id) {
di->sleep_reg = RK860X_VSEL1_B;
di->vol_reg = RK860X_VSEL0_B;
di->mode_reg = RK860X_VSEL0_A;
di->en_reg = RK860X_VSEL0_A;
di->sleep_en_reg = RK860X_VSEL1_A;
} else {
di->sleep_reg = RK860X_VSEL0_B;
di->vol_reg = RK860X_VSEL1_B;
di->mode_reg = RK860X_VSEL1_A;
di->en_reg = RK860X_VSEL1_A;
di->sleep_en_reg = RK860X_VSEL0_A;
}
break;
default:
dev_err(di->dev, "Chip ID %d not supported!\n", di->chip_id);
return -EINVAL;
}
di->mode_mask = VSEL_MODE;
di->slew_reg = RK860X_CONTROL;
di->slew_mask = CTL_SLEW_MASK;
di->slew_shift = CTL_SLEW_SHIFT;
if (pdata->limit_volt) {
if (pdata->limit_volt < di->vsel_min ||
pdata->limit_volt > 1500000)
pdata->limit_volt = 1500000;
val = (pdata->limit_volt - di->vsel_min) / di->vsel_step;
ret = regmap_write(di->regmap, RK860X_MAX_SET, val);
if (ret < 0) {
dev_err(di->dev, "Failed to set limit voltage!\n");
return ret;
}
}
return ret;
}
static int rk860x_regulator_register(struct rk860x_device_info *di,
struct regulator_config *config)
{
struct regulator_desc *rdesc = &di->desc;
rdesc->name = "rk860x-reg";
rdesc->supply_name = "vin";
rdesc->ops = &rk860x_regulator_ops;
rdesc->type = REGULATOR_VOLTAGE;
rdesc->n_voltages = di->n_voltages;
rdesc->enable_reg = di->en_reg;
rdesc->enable_mask = VSEL_BUCK_EN;
rdesc->min_uV = di->vsel_min;
rdesc->uV_step = di->vsel_step;
rdesc->vsel_reg = di->vol_reg;
rdesc->vsel_mask = di->vol_mask;
rdesc->owner = THIS_MODULE;
rdesc->enable_time = 400;
di->rdev = devm_regulator_register(di->dev, &di->desc, config);
return PTR_ERR_OR_ZERO(di->rdev);
}
static const struct regmap_config rk860x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static struct rk860x_platform_data *
rk860x_parse_dt(struct device *dev, struct device_node *np,
const struct regulator_desc *desc)
{
struct rk860x_platform_data *pdata;
int ret, flag, limit_volt;
u32 tmp;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return NULL;
pdata->regulator = of_get_regulator_init_data(dev, np, desc);
pdata->regulator->constraints.initial_state = PM_SUSPEND_MEM;
if (!(of_property_read_u32(np, "limit-microvolt", &limit_volt)))
pdata->limit_volt = limit_volt;
ret = of_property_read_u32(np, "rockchip,suspend-voltage-selector",
&tmp);
if (!ret)
pdata->sleep_vsel_id = tmp;
if (pdata->sleep_vsel_id)
flag = GPIOD_OUT_LOW;
else
flag = GPIOD_OUT_HIGH;
pdata->vsel_gpio = devm_gpiod_get_index_optional(dev, "vsel", 0, flag);
if (IS_ERR(pdata->vsel_gpio)) {
ret = PTR_ERR(pdata->vsel_gpio);
dev_err(dev, "failed to get vesl gpio (%d)\n", ret);
pdata->vsel_gpio = NULL;
}
return pdata;
}
static const struct of_device_id rk860x_dt_ids[] = {
{
.compatible = "rockchip,rk860x",
},
{ }
};
MODULE_DEVICE_TABLE(of, rk860x_dt_ids);
static int rk860x_regulator_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device_node *np = client->dev.of_node;
struct rk860x_device_info *di;
struct rk860x_platform_data *pdata;
struct regulator_config config = { };
unsigned int val;
int ret;
di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
if (!di)
return -ENOMEM;
di->desc.of_map_mode = rk860x_map_mode;
pdata = dev_get_platdata(&client->dev);
if (!pdata)
pdata = rk860x_parse_dt(&client->dev, np, &di->desc);
if (!pdata || !pdata->regulator) {
dev_err(&client->dev, "Platform data not found!\n");
return -ENODEV;
}
di->vsel_gpio = pdata->vsel_gpio;
di->sleep_vsel_id = pdata->sleep_vsel_id;
di->regulator = pdata->regulator;
if (client->dev.of_node) {
di->chip_id =
(unsigned long)of_device_get_match_data(&client->dev);
} else {
/* if no ramp constraint set, get the pdata ramp_delay */
if (!di->regulator->constraints.ramp_delay) {
int slew_idx = (pdata->slew_rate & 0x7)
? pdata->slew_rate : 0;
di->regulator->constraints.ramp_delay =
slew_rates[slew_idx];
}
di->chip_id = id->driver_data;
}
di->regmap = devm_regmap_init_i2c(client, &rk860x_regmap_config);
if (IS_ERR(di->regmap)) {
dev_err(&client->dev, "Failed to allocate regmap!\n");
return PTR_ERR(di->regmap);
}
di->dev = &client->dev;
i2c_set_clientdata(client, di);
/* Get chip ID */
ret = regmap_read(di->regmap, RK860X_ID1, &val);
if (ret < 0) {
dev_err(&client->dev, "Failed to get chip ID!\n");
return ret;
}
switch (di->chip_id) {
case RK860X_CHIP_ID_00:
case RK860X_CHIP_ID_01:
if ((val & DIE_ID) != 0x8) {
dev_err(&client->dev, "Failed to match chip ID!\n");
return -EINVAL;
}
break;
case RK860X_CHIP_ID_02:
case RK860X_CHIP_ID_03:
if ((val & DIE_ID) != 0xa) {
dev_err(&client->dev, "Failed to match chip ID!\n");
return -EINVAL;
}
break;
default:
return -EINVAL;
}
/* Device init */
ret = rk860x_device_setup(di, pdata);
if (ret < 0) {
dev_err(&client->dev, "Failed to setup device!\n");
return ret;
}
/* Register regulator */
config.dev = di->dev;
config.init_data = di->regulator;
config.regmap = di->regmap;
config.driver_data = di;
config.of_node = np;
ret = rk860x_regulator_register(di, &config);
if (ret < 0)
dev_err(&client->dev, "Failed to register regulator!\n");
return ret;
}
static void rk860x_regulator_shutdown(struct i2c_client *client)
{
struct rk860x_device_info *di;
int ret;
di = i2c_get_clientdata(client);
dev_info(di->dev, "rk860..... reset\n");
ret = regmap_update_bits(di->regmap, di->slew_reg,
CTL_RESET, CTL_RESET);
if (ret < 0)
dev_err(di->dev, "force rk860x_reset error! ret=%d\n", ret);
else
dev_info(di->dev, "force rk860x_reset ok!\n");
}
static const struct i2c_device_id rk860x_id[] = {
{ .name = "rk8600", .driver_data = RK860X_CHIP_ID_00 },
{ .name = "rk8601", .driver_data = RK860X_CHIP_ID_01 },
{ .name = "rk8602", .driver_data = RK860X_CHIP_ID_02 },
{ .name = "rk8603", .driver_data = RK860X_CHIP_ID_03 },
{},
};
MODULE_DEVICE_TABLE(i2c, rk860x_id);
static struct i2c_driver rk860x_regulator_driver = {
.driver = {
.name = "rk860-regulator",
.of_match_table = of_match_ptr(rk860x_dt_ids),
},
.probe = rk860x_regulator_probe,
.shutdown = rk860x_regulator_shutdown,
.id_table = rk860x_id,
};
module_i2c_driver(rk860x_regulator_driver);
MODULE_AUTHOR("Elaine Zhang <zhangqing@rock-chips.com>");
MODULE_DESCRIPTION("rk860x regulator driver");
MODULE_LICENSE("GPL v2");