linux_dsm_epyc7002/drivers/regulator/max8998.c

827 lines
22 KiB
C
Raw Normal View History

// SPDX-License-Identifier: GPL-2.0+
//
// max8998.c - Voltage regulator driver for the Maxim 8998
//
// Copyright (C) 2009-2010 Samsung Electronics
// Kyungmin Park <kyungmin.park@samsung.com>
// Marek Szyprowski <m.szyprowski@samsung.com>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/max8998.h>
#include <linux/mfd/max8998-private.h>
struct max8998_data {
struct device *dev;
struct max8998_dev *iodev;
int num_regulators;
u8 buck1_vol[4]; /* voltages for selection */
u8 buck2_vol[2];
unsigned int buck1_idx; /* index to last changed voltage */
/* value in a set */
unsigned int buck2_idx;
};
static const unsigned int charger_current_table[] = {
90000, 380000, 475000, 550000, 570000, 600000, 700000, 800000,
};
static int max8998_get_enable_register(struct regulator_dev *rdev,
int *reg, int *shift)
{
int ldo = rdev_get_id(rdev);
switch (ldo) {
case MAX8998_LDO2 ... MAX8998_LDO5:
*reg = MAX8998_REG_ONOFF1;
*shift = 3 - (ldo - MAX8998_LDO2);
break;
case MAX8998_LDO6 ... MAX8998_LDO13:
*reg = MAX8998_REG_ONOFF2;
*shift = 7 - (ldo - MAX8998_LDO6);
break;
case MAX8998_LDO14 ... MAX8998_LDO17:
*reg = MAX8998_REG_ONOFF3;
*shift = 7 - (ldo - MAX8998_LDO14);
break;
case MAX8998_BUCK1 ... MAX8998_BUCK4:
*reg = MAX8998_REG_ONOFF1;
*shift = 7 - (ldo - MAX8998_BUCK1);
break;
case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
*reg = MAX8998_REG_ONOFF4;
*shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
break;
case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
*reg = MAX8998_REG_CHGR2;
*shift = 7 - (ldo - MAX8998_ESAFEOUT1);
break;
case MAX8998_CHARGER:
*reg = MAX8998_REG_CHGR2;
*shift = 0;
break;
default:
return -EINVAL;
}
return 0;
}
static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
int ret, reg, shift = 8;
u8 val;
ret = max8998_get_enable_register(rdev, &reg, &shift);
if (ret)
return ret;
ret = max8998_read_reg(i2c, reg, &val);
if (ret)
return ret;
return val & (1 << shift);
}
static int max8998_ldo_is_enabled_inverted(struct regulator_dev *rdev)
{
return (!max8998_ldo_is_enabled(rdev));
}
static int max8998_ldo_enable(struct regulator_dev *rdev)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
int reg, shift = 8, ret;
ret = max8998_get_enable_register(rdev, &reg, &shift);
if (ret)
return ret;
return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift);
}
static int max8998_ldo_disable(struct regulator_dev *rdev)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
int reg, shift = 8, ret;
ret = max8998_get_enable_register(rdev, &reg, &shift);
if (ret)
return ret;
return max8998_update_reg(i2c, reg, 0, 1<<shift);
}
static int max8998_get_voltage_register(struct regulator_dev *rdev,
int *_reg, int *_shift, int *_mask)
{
int ldo = rdev_get_id(rdev);
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
int reg, shift = 0, mask = 0xff;
switch (ldo) {
case MAX8998_LDO2 ... MAX8998_LDO3:
reg = MAX8998_REG_LDO2_LDO3;
mask = 0xf;
if (ldo == MAX8998_LDO2)
shift = 4;
else
shift = 0;
break;
case MAX8998_LDO4 ... MAX8998_LDO7:
reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
break;
case MAX8998_LDO8 ... MAX8998_LDO9:
reg = MAX8998_REG_LDO8_LDO9;
mask = 0xf;
if (ldo == MAX8998_LDO8)
shift = 4;
else
shift = 0;
break;
case MAX8998_LDO10 ... MAX8998_LDO11:
reg = MAX8998_REG_LDO10_LDO11;
if (ldo == MAX8998_LDO10) {
shift = 5;
mask = 0x7;
} else {
shift = 0;
mask = 0x1f;
}
break;
case MAX8998_LDO12 ... MAX8998_LDO17:
reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
break;
case MAX8998_BUCK1:
reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx;
break;
case MAX8998_BUCK2:
reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx;
break;
case MAX8998_BUCK3:
reg = MAX8998_REG_BUCK3;
break;
case MAX8998_BUCK4:
reg = MAX8998_REG_BUCK4;
break;
default:
return -EINVAL;
}
*_reg = reg;
*_shift = shift;
*_mask = mask;
return 0;
}
static int max8998_get_voltage_sel(struct regulator_dev *rdev)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
int reg, shift = 0, mask, ret;
u8 val;
ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
if (ret)
return ret;
ret = max8998_read_reg(i2c, reg, &val);
if (ret)
return ret;
val >>= shift;
val &= mask;
return val;
}
static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
int reg, shift = 0, mask, ret;
ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
if (ret)
return ret;
ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift);
return ret;
}
static inline void buck1_gpio_set(int gpio1, int gpio2, int v)
{
gpio_set_value(gpio1, v & 0x1);
gpio_set_value(gpio2, (v >> 1) & 0x1);
}
static inline void buck2_gpio_set(int gpio, int v)
{
gpio_set_value(gpio, v & 0x1);
}
static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct max8998_platform_data *pdata = max8998->iodev->pdata;
struct i2c_client *i2c = max8998->iodev->i2c;
int buck = rdev_get_id(rdev);
int reg, shift = 0, mask, ret, j;
static u8 buck1_last_val;
ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
if (ret)
return ret;
switch (buck) {
case MAX8998_BUCK1:
dev_dbg(max8998->dev,
"BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n"
"buck1_vol3:%d, buck1_vol4:%d\n",
selector, max8998->buck1_vol[0], max8998->buck1_vol[1],
max8998->buck1_vol[2], max8998->buck1_vol[3]);
if (gpio_is_valid(pdata->buck1_set1) &&
gpio_is_valid(pdata->buck1_set2)) {
/* check if requested voltage */
/* value is already defined */
for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) {
if (max8998->buck1_vol[j] == selector) {
max8998->buck1_idx = j;
buck1_gpio_set(pdata->buck1_set1,
pdata->buck1_set2, j);
goto buck1_exit;
}
}
if (pdata->buck_voltage_lock)
return -EINVAL;
/* no predefine regulator found */
max8998->buck1_idx = (buck1_last_val % 2) + 2;
dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n",
max8998->buck1_idx);
max8998->buck1_vol[max8998->buck1_idx] = selector;
ret = max8998_get_voltage_register(rdev, &reg,
&shift,
&mask);
ret = max8998_write_reg(i2c, reg, selector);
buck1_gpio_set(pdata->buck1_set1,
pdata->buck1_set2, max8998->buck1_idx);
buck1_last_val++;
buck1_exit:
dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n",
i2c->name, gpio_get_value(pdata->buck1_set1),
gpio_get_value(pdata->buck1_set2));
break;
} else {
ret = max8998_write_reg(i2c, reg, selector);
}
break;
case MAX8998_BUCK2:
dev_dbg(max8998->dev,
"BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n",
selector, max8998->buck2_vol[0], max8998->buck2_vol[1]);
if (gpio_is_valid(pdata->buck2_set3)) {
/* check if requested voltage */
/* value is already defined */
for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) {
if (max8998->buck2_vol[j] == selector) {
max8998->buck2_idx = j;
buck2_gpio_set(pdata->buck2_set3, j);
goto buck2_exit;
}
}
if (pdata->buck_voltage_lock)
return -EINVAL;
max8998_get_voltage_register(rdev,
&reg, &shift, &mask);
ret = max8998_write_reg(i2c, reg, selector);
max8998->buck2_vol[max8998->buck2_idx] = selector;
buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx);
buck2_exit:
dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name,
gpio_get_value(pdata->buck2_set3));
} else {
ret = max8998_write_reg(i2c, reg, selector);
}
break;
case MAX8998_BUCK3:
case MAX8998_BUCK4:
ret = max8998_update_reg(i2c, reg, selector<<shift,
mask<<shift);
break;
}
return ret;
}
static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev,
unsigned int old_selector,
unsigned int new_selector)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
int buck = rdev_get_id(rdev);
u8 val = 0;
int difference, ret;
if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4)
return -EINVAL;
/* Voltage stabilization */
ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val);
if (ret)
return ret;
/* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */
/* MAX8998 has ENRAMP bit implemented, so test it*/
if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP))
return 0;
difference = (new_selector - old_selector) * rdev->desc->uV_step / 1000;
if (difference > 0)
return DIV_ROUND_UP(difference, (val & 0x0f) + 1);
return 0;
}
static int max8998_set_current_limit(struct regulator_dev *rdev,
int min_uA, int max_uA)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
unsigned int n_currents = rdev->desc->n_current_limits;
int i, sel = -1;
if (n_currents == 0)
return -EINVAL;
if (rdev->desc->curr_table) {
const unsigned int *curr_table = rdev->desc->curr_table;
bool ascend = curr_table[n_currents - 1] > curr_table[0];
/* search for closest to maximum */
if (ascend) {
for (i = n_currents - 1; i >= 0; i--) {
if (min_uA <= curr_table[i] &&
curr_table[i] <= max_uA) {
sel = i;
break;
}
}
} else {
for (i = 0; i < n_currents; i++) {
if (min_uA <= curr_table[i] &&
curr_table[i] <= max_uA) {
sel = i;
break;
}
}
}
}
if (sel < 0)
return -EINVAL;
sel <<= ffs(rdev->desc->csel_mask) - 1;
return max8998_update_reg(i2c, rdev->desc->csel_reg,
sel, rdev->desc->csel_mask);
}
int max8998_get_current_limit(struct regulator_dev *rdev)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
u8 val;
int ret;
ret = max8998_read_reg(i2c, rdev->desc->csel_reg, &val);
if (ret != 0)
return ret;
val &= rdev->desc->csel_mask;
val >>= ffs(rdev->desc->csel_mask) - 1;
if (rdev->desc->curr_table) {
if (val >= rdev->desc->n_current_limits)
return -EINVAL;
return rdev->desc->curr_table[val];
}
return -EINVAL;
}
static const struct regulator_ops max8998_ldo_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = max8998_ldo_is_enabled,
.enable = max8998_ldo_enable,
.disable = max8998_ldo_disable,
.get_voltage_sel = max8998_get_voltage_sel,
.set_voltage_sel = max8998_set_voltage_ldo_sel,
};
static const struct regulator_ops max8998_buck_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = max8998_ldo_is_enabled,
.enable = max8998_ldo_enable,
.disable = max8998_ldo_disable,
.get_voltage_sel = max8998_get_voltage_sel,
.set_voltage_sel = max8998_set_voltage_buck_sel,
.set_voltage_time_sel = max8998_set_voltage_buck_time_sel,
};
static const struct regulator_ops max8998_charger_ops = {
.set_current_limit = max8998_set_current_limit,
.get_current_limit = max8998_get_current_limit,
.is_enabled = max8998_ldo_is_enabled_inverted,
/* Swapped as register is inverted */
.enable = max8998_ldo_disable,
.disable = max8998_ldo_enable,
};
static const struct regulator_ops max8998_others_ops = {
.is_enabled = max8998_ldo_is_enabled,
.enable = max8998_ldo_enable,
.disable = max8998_ldo_disable,
};
#define MAX8998_LINEAR_REG(_name, _ops, _min, _step, _max) \
{ \
.name = #_name, \
.id = MAX8998_##_name, \
.ops = _ops, \
.min_uV = (_min), \
.uV_step = (_step), \
.n_voltages = ((_max) - (_min)) / (_step) + 1, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
#define MAX8998_CURRENT_REG(_name, _ops, _table, _reg, _mask) \
{ \
.name = #_name, \
.id = MAX8998_##_name, \
.ops = _ops, \
.curr_table = _table, \
.n_current_limits = ARRAY_SIZE(_table), \
.csel_reg = _reg, \
.csel_mask = _mask, \
.type = REGULATOR_CURRENT, \
.owner = THIS_MODULE, \
}
#define MAX8998_OTHERS_REG(_name, _id) \
{ \
.name = #_name, \
.id = _id, \
.ops = &max8998_others_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
static const struct regulator_desc regulators[] = {
MAX8998_LINEAR_REG(LDO2, &max8998_ldo_ops, 800000, 50000, 1300000),
MAX8998_LINEAR_REG(LDO3, &max8998_ldo_ops, 800000, 50000, 1300000),
MAX8998_LINEAR_REG(LDO4, &max8998_ldo_ops, 1600000, 100000, 3600000),
MAX8998_LINEAR_REG(LDO5, &max8998_ldo_ops, 1600000, 100000, 3600000),
MAX8998_LINEAR_REG(LDO6, &max8998_ldo_ops, 1600000, 100000, 3600000),
MAX8998_LINEAR_REG(LDO7, &max8998_ldo_ops, 1600000, 100000, 3600000),
MAX8998_LINEAR_REG(LDO8, &max8998_ldo_ops, 3000000, 100000, 3600000),
MAX8998_LINEAR_REG(LDO9, &max8998_ldo_ops, 2800000, 100000, 3100000),
MAX8998_LINEAR_REG(LDO10, &max8998_ldo_ops, 950000, 50000, 1300000),
MAX8998_LINEAR_REG(LDO11, &max8998_ldo_ops, 1600000, 100000, 3600000),
MAX8998_LINEAR_REG(LDO12, &max8998_ldo_ops, 800000, 100000, 3300000),
MAX8998_LINEAR_REG(LDO13, &max8998_ldo_ops, 800000, 100000, 3300000),
MAX8998_LINEAR_REG(LDO14, &max8998_ldo_ops, 1200000, 100000, 3300000),
MAX8998_LINEAR_REG(LDO15, &max8998_ldo_ops, 1200000, 100000, 3300000),
MAX8998_LINEAR_REG(LDO16, &max8998_ldo_ops, 1600000, 100000, 3600000),
MAX8998_LINEAR_REG(LDO17, &max8998_ldo_ops, 1600000, 100000, 3600000),
MAX8998_LINEAR_REG(BUCK1, &max8998_buck_ops, 750000, 25000, 1525000),
MAX8998_LINEAR_REG(BUCK2, &max8998_buck_ops, 750000, 25000, 1525000),
MAX8998_LINEAR_REG(BUCK3, &max8998_buck_ops, 1600000, 100000, 3600000),
MAX8998_LINEAR_REG(BUCK4, &max8998_buck_ops, 800000, 100000, 2300000),
MAX8998_OTHERS_REG(EN32KHz-AP, MAX8998_EN32KHZ_AP),
MAX8998_OTHERS_REG(EN32KHz-CP, MAX8998_EN32KHZ_CP),
MAX8998_OTHERS_REG(ENVICHG, MAX8998_ENVICHG),
MAX8998_OTHERS_REG(ESAFEOUT1, MAX8998_ESAFEOUT1),
MAX8998_OTHERS_REG(ESAFEOUT2, MAX8998_ESAFEOUT2),
MAX8998_CURRENT_REG(CHARGER, &max8998_charger_ops,
charger_current_table, MAX8998_REG_CHGR1, 0x7),
};
static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev,
struct max8998_platform_data *pdata,
struct device_node *pmic_np)
{
int gpio;
gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0);
if (!gpio_is_valid(gpio)) {
dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio);
return -EINVAL;
}
pdata->buck1_set1 = gpio;
gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1);
if (!gpio_is_valid(gpio)) {
dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio);
return -EINVAL;
}
pdata->buck1_set2 = gpio;
gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0);
if (!gpio_is_valid(gpio)) {
dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio);
return -EINVAL;
}
pdata->buck2_set3 = gpio;
return 0;
}
static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev,
struct max8998_platform_data *pdata)
{
struct device_node *pmic_np = iodev->dev->of_node;
struct device_node *regulators_np, *reg_np;
struct max8998_regulator_data *rdata;
unsigned int i;
int ret;
regulators_np = of_get_child_by_name(pmic_np, "regulators");
if (!regulators_np) {
dev_err(iodev->dev, "could not find regulators sub-node\n");
return -EINVAL;
}
/* count the number of regulators to be supported in pmic */
pdata->num_regulators = of_get_child_count(regulators_np);
treewide: devm_kzalloc() -> devm_kcalloc() The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc(). This patch replaces cases of: devm_kzalloc(handle, a * b, gfp) with: devm_kcalloc(handle, a * b, gfp) as well as handling cases of: devm_kzalloc(handle, a * b * c, gfp) with: devm_kzalloc(handle, array3_size(a, b, c), gfp) as it's slightly less ugly than: devm_kcalloc(handle, array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: devm_kzalloc(handle, 4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. Some manual whitespace fixes were needed in this patch, as Coccinelle really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...". The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ expression HANDLE; type TYPE; expression THING, E; @@ ( devm_kzalloc(HANDLE, - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | devm_kzalloc(HANDLE, - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression HANDLE; expression COUNT; typedef u8; typedef __u8; @@ ( devm_kzalloc(HANDLE, - sizeof(u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ expression HANDLE; type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ expression HANDLE; identifier SIZE, COUNT; @@ - devm_kzalloc + devm_kcalloc (HANDLE, - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression HANDLE; expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression HANDLE; expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ expression HANDLE; identifier STRIDE, SIZE, COUNT; @@ ( devm_kzalloc(HANDLE, - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression HANDLE; expression E1, E2, E3; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression HANDLE; expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, sizeof(THING) * C2, ...) | devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...) | devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, C1 * C2, ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * E2 + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * (E2) + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 04:07:58 +07:00
rdata = devm_kcalloc(iodev->dev,
pdata->num_regulators, sizeof(*rdata),
GFP_KERNEL);
if (!rdata) {
of_node_put(regulators_np);
return -ENOMEM;
}
pdata->regulators = rdata;
for (i = 0; i < ARRAY_SIZE(regulators); ++i) {
reg_np = of_get_child_by_name(regulators_np,
regulators[i].name);
if (!reg_np)
continue;
rdata->id = regulators[i].id;
rdata->initdata = of_get_regulator_init_data(iodev->dev,
reg_np,
&regulators[i]);
rdata->reg_node = reg_np;
++rdata;
}
pdata->num_regulators = rdata - pdata->regulators;
of_node_put(reg_np);
of_node_put(regulators_np);
ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
if (ret)
return -EINVAL;
if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL))
pdata->buck_voltage_lock = true;
ret = of_property_read_u32(pmic_np,
"max8998,pmic-buck1-default-dvs-idx",
&pdata->buck1_default_idx);
if (!ret && pdata->buck1_default_idx >= 4) {
pdata->buck1_default_idx = 0;
dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n");
}
ret = of_property_read_u32(pmic_np,
"max8998,pmic-buck2-default-dvs-idx",
&pdata->buck2_default_idx);
if (!ret && pdata->buck2_default_idx >= 2) {
pdata->buck2_default_idx = 0;
dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n");
}
ret = of_property_read_u32_array(pmic_np,
"max8998,pmic-buck1-dvs-voltage",
pdata->buck1_voltage,
ARRAY_SIZE(pdata->buck1_voltage));
if (ret) {
dev_err(iodev->dev, "buck1 voltages not specified\n");
return -EINVAL;
}
ret = of_property_read_u32_array(pmic_np,
"max8998,pmic-buck2-dvs-voltage",
pdata->buck2_voltage,
ARRAY_SIZE(pdata->buck2_voltage));
if (ret) {
dev_err(iodev->dev, "buck2 voltages not specified\n");
return -EINVAL;
}
return 0;
}
static int max8998_pmic_probe(struct platform_device *pdev)
{
struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct max8998_platform_data *pdata = iodev->pdata;
struct regulator_config config = { };
struct regulator_dev *rdev;
struct max8998_data *max8998;
struct i2c_client *i2c;
int i, ret;
unsigned int v;
if (!pdata) {
dev_err(pdev->dev.parent, "No platform init data supplied\n");
return -ENODEV;
}
if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) {
ret = max8998_pmic_dt_parse_pdata(iodev, pdata);
if (ret)
return ret;
}
max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data),
GFP_KERNEL);
if (!max8998)
return -ENOMEM;
max8998->dev = &pdev->dev;
max8998->iodev = iodev;
max8998->num_regulators = pdata->num_regulators;
platform_set_drvdata(pdev, max8998);
i2c = max8998->iodev->i2c;
max8998->buck1_idx = pdata->buck1_default_idx;
max8998->buck2_idx = pdata->buck2_default_idx;
/* NOTE: */
/* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */
/* will be displayed */
/* Check if MAX8998 voltage selection GPIOs are defined */
if (gpio_is_valid(pdata->buck1_set1) &&
gpio_is_valid(pdata->buck1_set2)) {
/* Check if SET1 is not equal to 0 */
if (!pdata->buck1_set1) {
dev_err(&pdev->dev,
"MAX8998 SET1 GPIO defined as 0 !\n");
WARN_ON(!pdata->buck1_set1);
return -EIO;
}
/* Check if SET2 is not equal to 0 */
if (!pdata->buck1_set2) {
dev_err(&pdev->dev,
"MAX8998 SET2 GPIO defined as 0 !\n");
WARN_ON(!pdata->buck1_set2);
return -EIO;
}
gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1");
gpio_direction_output(pdata->buck1_set1,
max8998->buck1_idx & 0x1);
gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2");
gpio_direction_output(pdata->buck1_set2,
(max8998->buck1_idx >> 1) & 0x1);
/* Set predefined values for BUCK1 registers */
for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) {
int index = MAX8998_BUCK1 - MAX8998_LDO2;
i = 0;
while (regulators[index].min_uV +
regulators[index].uV_step * i
< pdata->buck1_voltage[v])
i++;
max8998->buck1_vol[v] = i;
ret = max8998_write_reg(i2c,
MAX8998_REG_BUCK1_VOLTAGE1 + v, i);
if (ret)
return ret;
}
}
if (gpio_is_valid(pdata->buck2_set3)) {
/* Check if SET3 is not equal to 0 */
if (!pdata->buck2_set3) {
dev_err(&pdev->dev,
"MAX8998 SET3 GPIO defined as 0 !\n");
WARN_ON(!pdata->buck2_set3);
return -EIO;
}
gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3");
gpio_direction_output(pdata->buck2_set3,
max8998->buck2_idx & 0x1);
/* Set predefined values for BUCK2 registers */
for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) {
int index = MAX8998_BUCK2 - MAX8998_LDO2;
i = 0;
while (regulators[index].min_uV +
regulators[index].uV_step * i
< pdata->buck2_voltage[v])
i++;
max8998->buck2_vol[v] = i;
ret = max8998_write_reg(i2c,
MAX8998_REG_BUCK2_VOLTAGE1 + v, i);
if (ret)
return ret;
}
}
for (i = 0; i < pdata->num_regulators; i++) {
int index = pdata->regulators[i].id - MAX8998_LDO2;
config.dev = max8998->dev;
config.of_node = pdata->regulators[i].reg_node;
config.init_data = pdata->regulators[i].initdata;
config.driver_data = max8998;
rdev = devm_regulator_register(&pdev->dev, &regulators[index],
&config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(max8998->dev, "regulator %s init failed (%d)\n",
regulators[index].name, ret);
return ret;
}
}
return 0;
}
static const struct platform_device_id max8998_pmic_id[] = {
{ "max8998-pmic", TYPE_MAX8998 },
{ "lp3974-pmic", TYPE_LP3974 },
{ }
};
MODULE_DEVICE_TABLE(platform, max8998_pmic_id);
static struct platform_driver max8998_pmic_driver = {
.driver = {
.name = "max8998-pmic",
},
.probe = max8998_pmic_probe,
.id_table = max8998_pmic_id,
};
static int __init max8998_pmic_init(void)
{
return platform_driver_register(&max8998_pmic_driver);
}
subsys_initcall(max8998_pmic_init);
static void __exit max8998_pmic_cleanup(void)
{
platform_driver_unregister(&max8998_pmic_driver);
}
module_exit(max8998_pmic_cleanup);
MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
MODULE_LICENSE("GPL");