- 根目录:
- drivers
- regulator
- s2mps11.c
/*
* s2mps11.c
*
* Copyright (c) 2012 Samsung Electronics Co., Ltd
* http://www.samsung.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/bug.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/samsung/core.h>
#include <linux/mfd/samsung/s2mps11.h>
#define S2MPS11_REGULATOR_CNT ARRAY_SIZE(regulators)
struct s2mps11_info {
struct regulator_dev *rdev[S2MPS11_REGULATOR_MAX];
int ramp_delay2;
int ramp_delay34;
int ramp_delay5;
int ramp_delay16;
int ramp_delay7810;
int ramp_delay9;
};
static int get_ramp_delay(int ramp_delay)
{
unsigned char cnt = 0;
ramp_delay /= 6250;
while (true) {
ramp_delay = ramp_delay >> 1;
if (ramp_delay == 0)
break;
cnt++;
}
if (cnt > 3)
cnt = 3;
return cnt;
}
static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector,
unsigned int new_selector)
{
struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
unsigned int ramp_delay = 0;
int old_volt, new_volt;
switch (rdev->desc->id) {
case S2MPS11_BUCK2:
ramp_delay = s2mps11->ramp_delay2;
break;
case S2MPS11_BUCK3:
case S2MPS11_BUCK4:
ramp_delay = s2mps11->ramp_delay34;
break;
case S2MPS11_BUCK5:
ramp_delay = s2mps11->ramp_delay5;
break;
case S2MPS11_BUCK6:
case S2MPS11_BUCK1:
ramp_delay = s2mps11->ramp_delay16;
break;
case S2MPS11_BUCK7:
case S2MPS11_BUCK8:
case S2MPS11_BUCK10:
ramp_delay = s2mps11->ramp_delay7810;
break;
case S2MPS11_BUCK9:
ramp_delay = s2mps11->ramp_delay9;
}
if (ramp_delay == 0)
ramp_delay = rdev->desc->ramp_delay;
old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
}
static int s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
unsigned int ramp_val, ramp_shift, ramp_reg = S2MPS11_REG_RAMP_BUCK;
unsigned int ramp_enable = 1, enable_shift = 0;
int ret;
switch (rdev->desc->id) {
case S2MPS11_BUCK1:
if (ramp_delay > s2mps11->ramp_delay16)
s2mps11->ramp_delay16 = ramp_delay;
else
ramp_delay = s2mps11->ramp_delay16;
ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
break;
case S2MPS11_BUCK2:
enable_shift = S2MPS11_BUCK2_RAMP_EN_SHIFT;
if (!ramp_delay) {
ramp_enable = 0;
break;
}
s2mps11->ramp_delay2 = ramp_delay;
ramp_shift = S2MPS11_BUCK2_RAMP_SHIFT;
ramp_reg = S2MPS11_REG_RAMP;
break;
case S2MPS11_BUCK3:
enable_shift = S2MPS11_BUCK3_RAMP_EN_SHIFT;
if (!ramp_delay) {
ramp_enable = 0;
break;
}
if (ramp_delay > s2mps11->ramp_delay34)
s2mps11->ramp_delay34 = ramp_delay;
else
ramp_delay = s2mps11->ramp_delay34;
ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
ramp_reg = S2MPS11_REG_RAMP;
break;
case S2MPS11_BUCK4:
enable_shift = S2MPS11_BUCK4_RAMP_EN_SHIFT;
if (!ramp_delay) {
ramp_enable = 0;
break;
}
if (ramp_delay > s2mps11->ramp_delay34)
s2mps11->ramp_delay34 = ramp_delay;
else
ramp_delay = s2mps11->ramp_delay34;
ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
ramp_reg = S2MPS11_REG_RAMP;
break;
case S2MPS11_BUCK5:
s2mps11->ramp_delay5 = ramp_delay;
ramp_shift = S2MPS11_BUCK5_RAMP_SHIFT;
break;
case S2MPS11_BUCK6:
enable_shift = S2MPS11_BUCK6_RAMP_EN_SHIFT;
if (!ramp_delay) {
ramp_enable = 0;
break;
}
if (ramp_delay > s2mps11->ramp_delay16)
s2mps11->ramp_delay16 = ramp_delay;
else
ramp_delay = s2mps11->ramp_delay16;
ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
break;
case S2MPS11_BUCK7:
case S2MPS11_BUCK8:
case S2MPS11_BUCK10:
if (ramp_delay > s2mps11->ramp_delay7810)
s2mps11->ramp_delay7810 = ramp_delay;
else
ramp_delay = s2mps11->ramp_delay7810;
ramp_shift = S2MPS11_BUCK7810_RAMP_SHIFT;
break;
case S2MPS11_BUCK9:
s2mps11->ramp_delay9 = ramp_delay;
ramp_shift = S2MPS11_BUCK9_RAMP_SHIFT;
break;
default:
return 0;
}
if (!ramp_enable)
goto ramp_disable;
if (enable_shift) {
ret = regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
1 << enable_shift, 1 << enable_shift);
if (ret) {
dev_err(&rdev->dev, "failed to enable ramp rate\n");
return ret;
}
}
ramp_val = get_ramp_delay(ramp_delay);
return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
ramp_val << ramp_shift);
ramp_disable:
return regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
1 << enable_shift, 0);
}
static struct regulator_ops s2mps11_ldo_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
static struct regulator_ops s2mps11_buck_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = s2mps11_regulator_set_voltage_time_sel,
.set_ramp_delay = s2mps11_set_ramp_delay,
};
#define regulator_desc_ldo1(num) { \
.name = "LDO"#num, \
.id = S2MPS11_LDO##num, \
.ops = &s2mps11_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = S2MPS11_LDO_MIN, \
.uV_step = S2MPS11_LDO_STEP1, \
.n_voltages = S2MPS11_LDO_N_VOLTAGES, \
.vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \
.vsel_mask = S2MPS11_LDO_VSEL_MASK, \
.enable_reg = S2MPS11_REG_L1CTRL + num - 1, \
.enable_mask = S2MPS11_ENABLE_MASK \
}
#define regulator_desc_ldo2(num) { \
.name = "LDO"#num, \
.id = S2MPS11_LDO##num, \
.ops = &s2mps11_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = S2MPS11_LDO_MIN, \
.uV_step = S2MPS11_LDO_STEP2, \
.n_voltages = S2MPS11_LDO_N_VOLTAGES, \
.vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \
.vsel_mask = S2MPS11_LDO_VSEL_MASK, \
.enable_reg = S2MPS11_REG_L1CTRL + num - 1, \
.enable_mask = S2MPS11_ENABLE_MASK \
}
#define regulator_desc_buck1_4(num) { \
.name = "BUCK"#num, \
.id = S2MPS11_BUCK##num, \
.ops = &s2mps11_buck_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = S2MPS11_BUCK_MIN1, \
.uV_step = S2MPS11_BUCK_STEP1, \
.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPS11_RAMP_DELAY, \
.vsel_reg = S2MPS11_REG_B1CTRL2 + (num - 1) * 2, \
.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
.enable_reg = S2MPS11_REG_B1CTRL1 + (num - 1) * 2, \
.enable_mask = S2MPS11_ENABLE_MASK \
}
#define regulator_desc_buck5 { \
.name = "BUCK5", \
.id = S2MPS11_BUCK5, \
.ops = &s2mps11_buck_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = S2MPS11_BUCK_MIN1, \
.uV_step = S2MPS11_BUCK_STEP1, \
.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPS11_RAMP_DELAY, \
.vsel_reg = S2MPS11_REG_B5CTRL2, \
.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
.enable_reg = S2MPS11_REG_B5CTRL1, \
.enable_mask = S2MPS11_ENABLE_MASK \
}
#define regulator_desc_buck6_8(num) { \
.name = "BUCK"#num, \
.id = S2MPS11_BUCK##num, \
.ops = &s2mps11_buck_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = S2MPS11_BUCK_MIN1, \
.uV_step = S2MPS11_BUCK_STEP1, \
.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPS11_RAMP_DELAY, \
.vsel_reg = S2MPS11_REG_B6CTRL2 + (num - 6) * 2, \
.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
.enable_reg = S2MPS11_REG_B6CTRL1 + (num - 6) * 2, \
.enable_mask = S2MPS11_ENABLE_MASK \
}
#define regulator_desc_buck9 { \
.name = "BUCK9", \
.id = S2MPS11_BUCK9, \
.ops = &s2mps11_buck_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = S2MPS11_BUCK_MIN3, \
.uV_step = S2MPS11_BUCK_STEP3, \
.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPS11_RAMP_DELAY, \
.vsel_reg = S2MPS11_REG_B9CTRL2, \
.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
.enable_reg = S2MPS11_REG_B9CTRL1, \
.enable_mask = S2MPS11_ENABLE_MASK \
}
#define regulator_desc_buck10 { \
.name = "BUCK10", \
.id = S2MPS11_BUCK10, \
.ops = &s2mps11_buck_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = S2MPS11_BUCK_MIN2, \
.uV_step = S2MPS11_BUCK_STEP2, \
.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPS11_RAMP_DELAY, \
.vsel_reg = S2MPS11_REG_B10CTRL2, \
.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
.enable_reg = S2MPS11_REG_B10CTRL1, \
.enable_mask = S2MPS11_ENABLE_MASK \
}
static struct regulator_desc regulators[] = {
regulator_desc_ldo2(1),
regulator_desc_ldo1(2),
regulator_desc_ldo1(3),
regulator_desc_ldo1(4),
regulator_desc_ldo1(5),
regulator_desc_ldo2(6),
regulator_desc_ldo1(7),
regulator_desc_ldo1(8),
regulator_desc_ldo1(9),
regulator_desc_ldo1(10),
regulator_desc_ldo2(11),
regulator_desc_ldo1(12),
regulator_desc_ldo1(13),
regulator_desc_ldo1(14),
regulator_desc_ldo1(15),
regulator_desc_ldo1(16),
regulator_desc_ldo1(17),
regulator_desc_ldo1(18),
regulator_desc_ldo1(19),
regulator_desc_ldo1(20),
regulator_desc_ldo1(21),
regulator_desc_ldo2(22),
regulator_desc_ldo2(23),
regulator_desc_ldo1(24),
regulator_desc_ldo1(25),
regulator_desc_ldo1(26),
regulator_desc_ldo2(27),
regulator_desc_ldo1(28),
regulator_desc_ldo1(29),
regulator_desc_ldo1(30),
regulator_desc_ldo1(31),
regulator_desc_ldo1(32),
regulator_desc_ldo1(33),
regulator_desc_ldo1(34),
regulator_desc_ldo1(35),
regulator_desc_ldo1(36),
regulator_desc_ldo1(37),
regulator_desc_ldo1(38),
regulator_desc_buck1_4(1),
regulator_desc_buck1_4(2),
regulator_desc_buck1_4(3),
regulator_desc_buck1_4(4),
regulator_desc_buck5,
regulator_desc_buck6_8(6),
regulator_desc_buck6_8(7),
regulator_desc_buck6_8(8),
regulator_desc_buck9,
regulator_desc_buck10,
};
static int s2mps11_pmic_probe(struct platform_device *pdev)
{
struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
struct of_regulator_match rdata[S2MPS11_REGULATOR_MAX];
struct device_node *reg_np = NULL;
struct regulator_config config = { };
struct s2mps11_info *s2mps11;
int i, ret;
s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
GFP_KERNEL);
if (!s2mps11)
return -ENOMEM;
if (!iodev->dev->of_node) {
if (pdata) {
goto common_reg;
} else {
dev_err(pdev->dev.parent,
"Platform data or DT node not supplied\n");
return -ENODEV;
}
}
for (i = 0; i < S2MPS11_REGULATOR_CNT; i++)
rdata[i].name = regulators[i].name;
reg_np = of_find_node_by_name(iodev->dev->of_node, "regulators");
if (!reg_np) {
dev_err(&pdev->dev, "could not find regulators sub-node\n");
return -EINVAL;
}
of_regulator_match(&pdev->dev, reg_np, rdata, S2MPS11_REGULATOR_MAX);
common_reg:
platform_set_drvdata(pdev, s2mps11);
config.dev = &pdev->dev;
config.regmap = iodev->regmap_pmic;
config.driver_data = s2mps11;
for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
if (!reg_np) {
config.init_data = pdata->regulators[i].initdata;
config.of_node = pdata->regulators[i].reg_node;
} else {
config.init_data = rdata[i].init_data;
config.of_node = rdata[i].of_node;
}
s2mps11->rdev[i] = devm_regulator_register(&pdev->dev,
®ulators[i], &config);
if (IS_ERR(s2mps11->rdev[i])) {
ret = PTR_ERR(s2mps11->rdev[i]);
dev_err(&pdev->dev, "regulator init failed for %d\n",
i);
return ret;
}
}
return 0;
}
static const struct platform_device_id s2mps11_pmic_id[] = {
{ "s2mps11-pmic", 0},
{ },
};
MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
static struct platform_driver s2mps11_pmic_driver = {
.driver = {
.name = "s2mps11-pmic",
.owner = THIS_MODULE,
},
.probe = s2mps11_pmic_probe,
.id_table = s2mps11_pmic_id,
};
static int __init s2mps11_pmic_init(void)
{
return platform_driver_register(&s2mps11_pmic_driver);
}
subsys_initcall(s2mps11_pmic_init);
static void __exit s2mps11_pmic_exit(void)
{
platform_driver_unregister(&s2mps11_pmic_driver);
}
module_exit(s2mps11_pmic_exit);
/* Module information */
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver");
MODULE_LICENSE("GPL");