// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AXP20x PMIC USB power supply status driver
*
* Copyright (C) 2015 Hans de Goede <[email protected]>
* Copyright (C) 2014 Bruno Prémont <[email protected]>
*/
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/devm-helpers.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/axp20x.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/iio/consumer.h>
#include <linux/workqueue.h>
#define DRVNAME "axp20x-usb-power-supply"
#define AXP192_USB_OTG_STATUS 0x04
#define AXP20X_PWR_STATUS_VBUS_PRESENT BIT(5)
#define AXP20X_PWR_STATUS_VBUS_USED BIT(4)
#define AXP717_PWR_STATUS_VBUS_GOOD BIT(5)
#define AXP20X_USB_STATUS_VBUS_VALID BIT(2)
#define AXP717_PMU_FAULT_VBUS BIT(5)
#define AXP717_PMU_FAULT_VSYS BIT(3)
#define AXP20X_VBUS_VHOLD_uV(b) (4000000 + (((b) >> 3) & 7) * 100000)
#define AXP20X_VBUS_VHOLD_MASK GENMASK(5, 3)
#define AXP20X_VBUS_VHOLD_OFFSET 3
#define AXP20X_ADC_EN1_VBUS_CURR BIT(2)
#define AXP20X_ADC_EN1_VBUS_VOLT BIT(3)
#define AXP717_INPUT_VOL_LIMIT_MASK GENMASK(3, 0)
#define AXP717_INPUT_CUR_LIMIT_MASK GENMASK(5, 0)
#define AXP717_ADC_DATA_MASK GENMASK(14, 0)
#define AXP717_ADC_EN_VBUS_VOLT BIT(2)
/*
* Note do not raise the debounce time, we must report Vusb high within
* 100ms otherwise we get Vbus errors in musb.
*/
#define DEBOUNCE_TIME msecs_to_jiffies(50)
struct axp20x_usb_power;
struct axp_data {
const struct power_supply_desc *power_desc;
const char * const *irq_names;
unsigned int num_irq_names;
const int *curr_lim_table;
int curr_lim_table_size;
struct reg_field curr_lim_fld;
struct reg_field vbus_valid_bit;
struct reg_field vbus_mon_bit;
struct reg_field usb_bc_en_bit;
struct reg_field usb_bc_det_fld;
struct reg_field vbus_disable_bit;
bool vbus_needs_polling: 1;
void (*axp20x_read_vbus)(struct work_struct *work);
int (*axp20x_cfg_iio_chan)(struct platform_device *pdev,
struct axp20x_usb_power *power);
int (*axp20x_cfg_adc_reg)(struct axp20x_usb_power *power);
};
struct axp20x_usb_power {
struct device *dev;
struct regmap *regmap;
struct regmap_field *curr_lim_fld;
struct regmap_field *vbus_valid_bit;
struct regmap_field *vbus_mon_bit;
struct regmap_field *usb_bc_en_bit;
struct regmap_field *usb_bc_det_fld;
struct regmap_field *vbus_disable_bit;
struct power_supply *supply;
const struct axp_data *axp_data;
struct iio_channel *vbus_v;
struct iio_channel *vbus_i;
struct delayed_work vbus_detect;
int max_input_cur;
unsigned int old_status;
unsigned int online;
unsigned int num_irqs;
unsigned int irqs[] __counted_by(num_irqs);
};
static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power)
{
/*
* Polling is only necessary while VBUS is offline. While online, a
* present->absent transition implies an online->offline transition
* and will trigger the VBUS_REMOVAL IRQ.
*/
if (power->axp_data->vbus_needs_polling && !power->online)
return true;
return false;
}
static irqreturn_t axp20x_usb_power_irq(int irq, void *devid)
{
struct axp20x_usb_power *power = devid;
power_supply_changed(power->supply);
mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
return IRQ_HANDLED;
}
static void axp20x_usb_power_poll_vbus(struct work_struct *work)
{
struct axp20x_usb_power *power =
container_of(work, struct axp20x_usb_power, vbus_detect.work);
unsigned int val;
int ret;
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &val);
if (ret)
goto out;
val &= (AXP20X_PWR_STATUS_VBUS_PRESENT | AXP20X_PWR_STATUS_VBUS_USED);
if (val != power->old_status)
power_supply_changed(power->supply);
if (power->usb_bc_en_bit && (val & AXP20X_PWR_STATUS_VBUS_PRESENT) !=
(power->old_status & AXP20X_PWR_STATUS_VBUS_PRESENT)) {
dev_dbg(power->dev, "Cable status changed, re-enabling USB BC");
ret = regmap_field_write(power->usb_bc_en_bit, 1);
if (ret)
dev_err(power->dev, "failed to enable USB BC: errno %d",
ret);
}
power->old_status = val;
power->online = val & AXP20X_PWR_STATUS_VBUS_USED;
out:
if (axp20x_usb_vbus_needs_polling(power))
mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
}
static void axp717_usb_power_poll_vbus(struct work_struct *work)
{
struct axp20x_usb_power *power =
container_of(work, struct axp20x_usb_power, vbus_detect.work);
unsigned int val;
int ret;
ret = regmap_read(power->regmap, AXP717_ON_INDICATE, &val);
if (ret)
return;
val &= AXP717_PWR_STATUS_VBUS_GOOD;
if (val != power->old_status)
power_supply_changed(power->supply);
power->old_status = val;
}
static int axp20x_get_usb_type(struct axp20x_usb_power *power,
union power_supply_propval *val)
{
unsigned int reg;
int ret;
if (!power->usb_bc_det_fld)
return -EINVAL;
ret = regmap_field_read(power->usb_bc_det_fld, ®);
if (ret)
return ret;
switch (reg) {
case 1:
val->intval = POWER_SUPPLY_USB_TYPE_SDP;
break;
case 2:
val->intval = POWER_SUPPLY_USB_TYPE_CDP;
break;
case 3:
val->intval = POWER_SUPPLY_USB_TYPE_DCP;
break;
default:
val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
break;
}
return 0;
}
static int axp20x_usb_power_get_property(struct power_supply *psy,
enum power_supply_property psp, union power_supply_propval *val)
{
struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
unsigned int input, v;
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v);
if (ret)
return ret;
val->intval = AXP20X_VBUS_VHOLD_uV(v);
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
ret = iio_read_channel_processed(power->vbus_v,
&val->intval);
if (ret)
return ret;
/*
* IIO framework gives mV but Power Supply framework
* gives uV.
*/
val->intval *= 1000;
return 0;
}
ret = axp20x_read_variable_width(power->regmap,
AXP20X_VBUS_V_ADC_H, 12);
if (ret < 0)
return ret;
val->intval = ret * 1700; /* 1 step = 1.7 mV */
return 0;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = regmap_field_read(power->curr_lim_fld, &v);
if (ret)
return ret;
if (v < power->axp_data->curr_lim_table_size)
val->intval = power->axp_data->curr_lim_table[v];
else
val->intval = power->axp_data->curr_lim_table[
power->axp_data->curr_lim_table_size - 1];
return 0;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
ret = iio_read_channel_processed(power->vbus_i,
&val->intval);
if (ret)
return ret;
/*
* IIO framework gives mA but Power Supply framework
* gives uA.
*/
val->intval *= 1000;
return 0;
}
ret = axp20x_read_variable_width(power->regmap,
AXP20X_VBUS_I_ADC_H, 12);
if (ret < 0)
return ret;
val->intval = ret * 375; /* 1 step = 0.375 mA */
return 0;
case POWER_SUPPLY_PROP_USB_TYPE:
return axp20x_get_usb_type(power, val);
default:
break;
}
/* All the properties below need the input-status reg value */
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &input);
if (ret)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_HEALTH:
if (!(input & AXP20X_PWR_STATUS_VBUS_PRESENT)) {
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
break;
}
val->intval = POWER_SUPPLY_HEALTH_GOOD;
if (power->vbus_valid_bit) {
ret = regmap_field_read(power->vbus_valid_bit, &v);
if (ret)
return ret;
if (v == 0)
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
}
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_PRESENT);
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_USED);
break;
default:
return -EINVAL;
}
return 0;
}
static int axp717_usb_power_get_property(struct power_supply *psy,
enum power_supply_property psp, union power_supply_propval *val)
{
struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
unsigned int v;
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_HEALTH:
val->intval = POWER_SUPPLY_HEALTH_GOOD;
ret = regmap_read(power->regmap, AXP717_ON_INDICATE, &v);
if (ret)
return ret;
if (!(v & AXP717_PWR_STATUS_VBUS_GOOD))
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
ret = regmap_read(power->regmap, AXP717_PMU_FAULT_VBUS, &v);
if (ret)
return ret;
v &= (AXP717_PMU_FAULT_VBUS | AXP717_PMU_FAULT_VSYS);
if (v) {
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
regmap_write(power->regmap, AXP717_PMU_FAULT_VBUS, v);
}
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = regmap_read(power->regmap, AXP717_INPUT_CUR_LIMIT_CTRL, &v);
if (ret)
return ret;
/* 50ma step size with 100ma offset. */
v &= AXP717_INPUT_CUR_LIMIT_MASK;
val->intval = (v * 50000) + 100000;
break;
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_PRESENT:
ret = regmap_read(power->regmap, AXP717_ON_INDICATE, &v);
if (ret)
return ret;
val->intval = !!(v & AXP717_PWR_STATUS_VBUS_GOOD);
break;
case POWER_SUPPLY_PROP_USB_TYPE:
return axp20x_get_usb_type(power, val);
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
ret = regmap_read(power->regmap, AXP717_INPUT_VOL_LIMIT_CTRL, &v);
if (ret)
return ret;
/* 80mv step size with 3.88v offset. */
v &= AXP717_INPUT_VOL_LIMIT_MASK;
val->intval = (v * 80000) + 3880000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
ret = iio_read_channel_processed(power->vbus_v,
&val->intval);
if (ret)
return ret;
/*
* IIO framework gives mV but Power Supply framework
* gives uV.
*/
val->intval *= 1000;
return 0;
}
ret = axp20x_read_variable_width(power->regmap,
AXP717_VBUS_V_H, 16);
if (ret < 0)
return ret;
val->intval = (ret % AXP717_ADC_DATA_MASK) * 1000;
break;
default:
return -EINVAL;
}
return 0;
}
static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power,
int intval)
{
int val;
switch (intval) {
case 4000000:
case 4100000:
case 4200000:
case 4300000:
case 4400000:
case 4500000:
case 4600000:
case 4700000:
val = (intval - 4000000) / 100000;
return regmap_update_bits(power->regmap,
AXP20X_VBUS_IPSOUT_MGMT,
AXP20X_VBUS_VHOLD_MASK,
val << AXP20X_VBUS_VHOLD_OFFSET);
default:
return -EINVAL;
}
return -EINVAL;
}
static int axp717_usb_power_set_voltage_min(struct axp20x_usb_power *power,
int intval)
{
int val;
/* Minimum value of 3.88v and maximum of 5.08v. */
if (intval < 3880000 || intval > 5080000)
return -EINVAL;
/* step size of 80ma with 3.88v offset. */
val = (intval - 3880000) / 80000;
return regmap_update_bits(power->regmap,
AXP717_INPUT_VOL_LIMIT_CTRL,
AXP717_INPUT_VOL_LIMIT_MASK, val);
}
static int axp20x_usb_power_set_input_current_limit(struct axp20x_usb_power *power,
int intval)
{
int ret;
unsigned int reg;
const unsigned int max = power->axp_data->curr_lim_table_size;
if (intval == -1)
return -EINVAL;
if (power->max_input_cur && (intval > power->max_input_cur)) {
dev_warn(power->dev,
"requested current %d clamped to max current %d\n",
intval, power->max_input_cur);
intval = power->max_input_cur;
}
/*
* BC1.2 detection can cause a race condition if we try to set a current
* limit while it's in progress. When it finishes it will overwrite the
* current limit we just set.
*/
if (power->usb_bc_en_bit) {
dev_dbg(power->dev,
"disabling BC1.2 detection because current limit was set");
ret = regmap_field_write(power->usb_bc_en_bit, 0);
if (ret)
return ret;
}
for (reg = max - 1; reg > 0; reg--)
if (power->axp_data->curr_lim_table[reg] <= intval)
break;
dev_dbg(power->dev, "setting input current limit reg to %d (%d uA), requested %d uA",
reg, power->axp_data->curr_lim_table[reg], intval);
return regmap_field_write(power->curr_lim_fld, reg);
}
static int axp717_usb_power_set_input_current_limit(struct axp20x_usb_power *power,
int intval)
{
int tmp;
/* Minimum value of 100mA and maximum value of 3.25A*/
if (intval < 100000 || intval > 3250000)
return -EINVAL;
if (power->max_input_cur && (intval > power->max_input_cur)) {
dev_warn(power->dev,
"reqested current %d clamped to max current %d\n",
intval, power->max_input_cur);
intval = power->max_input_cur;
}
/* Minimum value of 100mA with step size of 50mA. */
tmp = (intval - 100000) / 50000;
return regmap_update_bits(power->regmap,
AXP717_INPUT_CUR_LIMIT_CTRL,
AXP717_INPUT_CUR_LIMIT_MASK, tmp);
}
static int axp20x_usb_power_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
if (!power->vbus_disable_bit)
return -EINVAL;
return regmap_field_write(power->vbus_disable_bit, !val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
return axp20x_usb_power_set_voltage_min(power, val->intval);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return axp20x_usb_power_set_input_current_limit(power, val->intval);
default:
return -EINVAL;
}
}
static int axp717_usb_power_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return axp717_usb_power_set_input_current_limit(power, val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
return axp717_usb_power_set_voltage_min(power, val->intval);
default:
return -EINVAL;
}
return -EINVAL;
}
static int axp20x_usb_power_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
/*
* The VBUS path select flag works differently on AXP288 and newer:
* - On AXP20x and AXP22x, the flag enables VBUS (ignoring N_VBUSEN).
* - On AXP288 and AXP8xx, the flag disables VBUS (ignoring N_VBUSEN).
* We only expose the control on variants where it can be used to force
* the VBUS input offline.
*/
if (psp == POWER_SUPPLY_PROP_ONLINE)
return power->vbus_disable_bit != NULL;
return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
}
static int axp717_usb_power_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
}
static int axp20x_configure_iio_channels(struct platform_device *pdev,
struct axp20x_usb_power *power)
{
power->vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v");
if (IS_ERR(power->vbus_v)) {
if (PTR_ERR(power->vbus_v) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(power->vbus_v);
}
power->vbus_i = devm_iio_channel_get(&pdev->dev, "vbus_i");
if (IS_ERR(power->vbus_i)) {
if (PTR_ERR(power->vbus_i) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(power->vbus_i);
}
return 0;
}
static int axp717_configure_iio_channels(struct platform_device *pdev,
struct axp20x_usb_power *power)
{
power->vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v");
if (IS_ERR(power->vbus_v)) {
if (PTR_ERR(power->vbus_v) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(power->vbus_v);
}
return 0;
}
static int axp20x_configure_adc_registers(struct axp20x_usb_power *power)
{
/* Enable vbus voltage and current measurement */
return regmap_update_bits(power->regmap, AXP20X_ADC_EN1,
AXP20X_ADC_EN1_VBUS_CURR |
AXP20X_ADC_EN1_VBUS_VOLT,
AXP20X_ADC_EN1_VBUS_CURR |
AXP20X_ADC_EN1_VBUS_VOLT);
}
static int axp717_configure_adc_registers(struct axp20x_usb_power *power)
{
/* Enable vbus voltage measurement */
return regmap_update_bits(power->regmap, AXP717_ADC_CH_EN_CONTROL,
AXP717_ADC_EN_VBUS_VOLT,
AXP717_ADC_EN_VBUS_VOLT);
}
static enum power_supply_property axp20x_usb_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static enum power_supply_property axp22x_usb_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
};
static enum power_supply_property axp717_usb_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
static enum power_supply_property axp813_usb_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_USB_TYPE,
};
static const struct power_supply_desc axp20x_usb_power_desc = {
.name = "axp20x-usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = axp20x_usb_power_properties,
.num_properties = ARRAY_SIZE(axp20x_usb_power_properties),
.property_is_writeable = axp20x_usb_power_prop_writeable,
.get_property = axp20x_usb_power_get_property,
.set_property = axp20x_usb_power_set_property,
};
static const struct power_supply_desc axp22x_usb_power_desc = {
.name = "axp20x-usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = axp22x_usb_power_properties,
.num_properties = ARRAY_SIZE(axp22x_usb_power_properties),
.property_is_writeable = axp20x_usb_power_prop_writeable,
.get_property = axp20x_usb_power_get_property,
.set_property = axp20x_usb_power_set_property,
};
static const struct power_supply_desc axp717_usb_power_desc = {
.name = "axp20x-usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = axp717_usb_power_properties,
.num_properties = ARRAY_SIZE(axp717_usb_power_properties),
.property_is_writeable = axp717_usb_power_prop_writeable,
.get_property = axp717_usb_power_get_property,
.set_property = axp717_usb_power_set_property,
.usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) |
BIT(POWER_SUPPLY_USB_TYPE_CDP) |
BIT(POWER_SUPPLY_USB_TYPE_DCP) |
BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN),
};
static const struct power_supply_desc axp813_usb_power_desc = {
.name = "axp20x-usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = axp813_usb_power_properties,
.num_properties = ARRAY_SIZE(axp813_usb_power_properties),
.property_is_writeable = axp20x_usb_power_prop_writeable,
.get_property = axp20x_usb_power_get_property,
.set_property = axp20x_usb_power_set_property,
.usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) |
BIT(POWER_SUPPLY_USB_TYPE_CDP) |
BIT(POWER_SUPPLY_USB_TYPE_DCP) |
BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN),
};
static const char * const axp20x_irq_names[] = {
"VBUS_PLUGIN",
"VBUS_REMOVAL",
"VBUS_VALID",
"VBUS_NOT_VALID",
};
static const char * const axp22x_irq_names[] = {
"VBUS_PLUGIN",
"VBUS_REMOVAL",
};
static const char * const axp717_irq_names[] = {
"VBUS_PLUGIN",
"VBUS_REMOVAL",
"VBUS_OVER_V",
};
static int axp192_usb_curr_lim_table[] = {
-1,
-1,
500000,
100000,
};
static int axp20x_usb_curr_lim_table[] = {
900000,
500000,
100000,
-1,
};
static int axp221_usb_curr_lim_table[] = {
900000,
500000,
-1,
-1,
};
static int axp813_usb_curr_lim_table[] = {
100000,
500000,
900000,
1500000,
2000000,
2500000,
3000000,
3500000,
4000000,
};
static const struct axp_data axp192_data = {
.power_desc = &axp20x_usb_power_desc,
.irq_names = axp20x_irq_names,
.num_irq_names = ARRAY_SIZE(axp20x_irq_names),
.curr_lim_table = axp192_usb_curr_lim_table,
.curr_lim_table_size = ARRAY_SIZE(axp192_usb_curr_lim_table),
.curr_lim_fld = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
.vbus_valid_bit = REG_FIELD(AXP192_USB_OTG_STATUS, 2, 2),
.vbus_mon_bit = REG_FIELD(AXP20X_VBUS_MON, 3, 3),
.axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
.axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
.axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
};
static const struct axp_data axp202_data = {
.power_desc = &axp20x_usb_power_desc,
.irq_names = axp20x_irq_names,
.num_irq_names = ARRAY_SIZE(axp20x_irq_names),
.curr_lim_table = axp20x_usb_curr_lim_table,
.curr_lim_table_size = ARRAY_SIZE(axp20x_usb_curr_lim_table),
.curr_lim_fld = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
.vbus_valid_bit = REG_FIELD(AXP20X_USB_OTG_STATUS, 2, 2),
.vbus_mon_bit = REG_FIELD(AXP20X_VBUS_MON, 3, 3),
.axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
.axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
.axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
};
static const struct axp_data axp221_data = {
.power_desc = &axp22x_usb_power_desc,
.irq_names = axp22x_irq_names,
.num_irq_names = ARRAY_SIZE(axp22x_irq_names),
.curr_lim_table = axp221_usb_curr_lim_table,
.curr_lim_table_size = ARRAY_SIZE(axp221_usb_curr_lim_table),
.curr_lim_fld = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
.vbus_needs_polling = true,
.axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
.axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
.axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
};
static const struct axp_data axp223_data = {
.power_desc = &axp22x_usb_power_desc,
.irq_names = axp22x_irq_names,
.num_irq_names = ARRAY_SIZE(axp22x_irq_names),
.curr_lim_table = axp20x_usb_curr_lim_table,
.curr_lim_table_size = ARRAY_SIZE(axp20x_usb_curr_lim_table),
.curr_lim_fld = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
.vbus_needs_polling = true,
.axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
.axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
.axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
};
static const struct axp_data axp717_data = {
.power_desc = &axp717_usb_power_desc,
.irq_names = axp717_irq_names,
.num_irq_names = ARRAY_SIZE(axp717_irq_names),
.curr_lim_fld = REG_FIELD(AXP717_INPUT_CUR_LIMIT_CTRL, 0, 5),
.usb_bc_en_bit = REG_FIELD(AXP717_MODULE_EN_CONTROL_1, 4, 4),
.usb_bc_det_fld = REG_FIELD(AXP717_BC_DETECT, 5, 7),
.vbus_mon_bit = REG_FIELD(AXP717_ADC_CH_EN_CONTROL, 2, 2),
.vbus_needs_polling = false,
.axp20x_read_vbus = &axp717_usb_power_poll_vbus,
.axp20x_cfg_iio_chan = axp717_configure_iio_channels,
.axp20x_cfg_adc_reg = axp717_configure_adc_registers,
};
static const struct axp_data axp813_data = {
.power_desc = &axp813_usb_power_desc,
.irq_names = axp22x_irq_names,
.num_irq_names = ARRAY_SIZE(axp22x_irq_names),
.curr_lim_table = axp813_usb_curr_lim_table,
.curr_lim_table_size = ARRAY_SIZE(axp813_usb_curr_lim_table),
.curr_lim_fld = REG_FIELD(AXP22X_CHRG_CTRL3, 4, 7),
.usb_bc_en_bit = REG_FIELD(AXP288_BC_GLOBAL, 0, 0),
.usb_bc_det_fld = REG_FIELD(AXP288_BC_DET_STAT, 5, 7),
.vbus_disable_bit = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 7, 7),
.vbus_needs_polling = true,
.axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
.axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
.axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
};
#ifdef CONFIG_PM_SLEEP
static int axp20x_usb_power_suspend(struct device *dev)
{
struct axp20x_usb_power *power = dev_get_drvdata(dev);
int i = 0;
/*
* Allow wake via VBUS_PLUGIN only.
*
* As nested threaded IRQs are not automatically disabled during
* suspend, we must explicitly disable the remainder of the IRQs.
*/
if (device_may_wakeup(&power->supply->dev))
enable_irq_wake(power->irqs[i++]);
while (i < power->num_irqs)
disable_irq(power->irqs[i++]);
return 0;
}
static int axp20x_usb_power_resume(struct device *dev)
{
struct axp20x_usb_power *power = dev_get_drvdata(dev);
int i = 0;
if (device_may_wakeup(&power->supply->dev))
disable_irq_wake(power->irqs[i++]);
while (i < power->num_irqs)
enable_irq(power->irqs[i++]);
mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(axp20x_usb_power_pm_ops, axp20x_usb_power_suspend,
axp20x_usb_power_resume);
static int axp20x_regmap_field_alloc_optional(struct device *dev,
struct regmap *regmap,
struct reg_field fdesc,
struct regmap_field **fieldp)
{
struct regmap_field *field;
if (fdesc.reg == 0) {
*fieldp = NULL;
return 0;
}
field = devm_regmap_field_alloc(dev, regmap, fdesc);
if (IS_ERR(field))
return PTR_ERR(field);
*fieldp = field;
return 0;
}
/* Optionally allow users to specify a maximum charging current. */
static void axp20x_usb_power_parse_dt(struct device *dev,
struct axp20x_usb_power *power)
{
int ret;
ret = device_property_read_u32(dev, "input-current-limit-microamp",
&power->max_input_cur);
if (ret)
dev_dbg(dev, "%s() no input-current-limit specified\n", __func__);
}
static int axp20x_usb_power_probe(struct platform_device *pdev)
{
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config psy_cfg = {};
struct axp20x_usb_power *power;
const struct axp_data *axp_data;
int i, irq, ret;
if (!of_device_is_available(pdev->dev.of_node))
return -ENODEV;
if (!axp20x) {
dev_err(&pdev->dev, "Parent drvdata not set\n");
return -EINVAL;
}
axp_data = of_device_get_match_data(&pdev->dev);
power = devm_kzalloc(&pdev->dev,
struct_size(power, irqs, axp_data->num_irq_names),
GFP_KERNEL);
if (!power)
return -ENOMEM;
platform_set_drvdata(pdev, power);
power->dev = &pdev->dev;
power->axp_data = axp_data;
power->regmap = axp20x->regmap;
power->num_irqs = axp_data->num_irq_names;
power->curr_lim_fld = devm_regmap_field_alloc(&pdev->dev, power->regmap,
axp_data->curr_lim_fld);
if (IS_ERR(power->curr_lim_fld))
return PTR_ERR(power->curr_lim_fld);
axp20x_usb_power_parse_dt(&pdev->dev, power);
ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
axp_data->vbus_valid_bit,
&power->vbus_valid_bit);
if (ret)
return ret;
ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
axp_data->vbus_mon_bit,
&power->vbus_mon_bit);
if (ret)
return ret;
ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
axp_data->usb_bc_en_bit,
&power->usb_bc_en_bit);
if (ret)
return ret;
ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
axp_data->usb_bc_det_fld,
&power->usb_bc_det_fld);
if (ret)
return ret;
ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
axp_data->vbus_disable_bit,
&power->vbus_disable_bit);
if (ret)
return ret;
ret = devm_delayed_work_autocancel(&pdev->dev, &power->vbus_detect,
axp_data->axp20x_read_vbus);
if (ret)
return ret;
if (power->vbus_mon_bit) {
/* Enable vbus valid checking */
ret = regmap_field_write(power->vbus_mon_bit, 1);
if (ret)
return ret;
if (IS_ENABLED(CONFIG_AXP20X_ADC))
ret = axp_data->axp20x_cfg_iio_chan(pdev, power);
else
ret = axp_data->axp20x_cfg_adc_reg(power);
if (ret)
return ret;
}
if (power->usb_bc_en_bit) {
/* Enable USB Battery Charging specification detection */
ret = regmap_field_write(power->usb_bc_en_bit, 1);
if (ret)
return ret;
}
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = power;
power->supply = devm_power_supply_register(&pdev->dev,
axp_data->power_desc,
&psy_cfg);
if (IS_ERR(power->supply))
return PTR_ERR(power->supply);
/* Request irqs after registering, as irqs may trigger immediately */
for (i = 0; i < axp_data->num_irq_names; i++) {
irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]);
if (irq < 0)
return irq;
power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i],
axp20x_usb_power_irq, 0,
DRVNAME, power);
if (ret < 0) {
dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n",
axp_data->irq_names[i], ret);
return ret;
}
}
if (axp20x_usb_vbus_needs_polling(power))
queue_delayed_work(system_power_efficient_wq, &power->vbus_detect, 0);
return 0;
}
static const struct of_device_id axp20x_usb_power_match[] = {
{
.compatible = "x-powers,axp192-usb-power-supply",
.data = &axp192_data,
}, {
.compatible = "x-powers,axp202-usb-power-supply",
.data = &axp202_data,
}, {
.compatible = "x-powers,axp221-usb-power-supply",
.data = &axp221_data,
}, {
.compatible = "x-powers,axp223-usb-power-supply",
.data = &axp223_data,
}, {
.compatible = "x-powers,axp717-usb-power-supply",
.data = &axp717_data,
}, {
.compatible = "x-powers,axp813-usb-power-supply",
.data = &axp813_data,
}, { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, axp20x_usb_power_match);
static struct platform_driver axp20x_usb_power_driver = {
.probe = axp20x_usb_power_probe,
.driver = {
.name = DRVNAME,
.of_match_table = axp20x_usb_power_match,
.pm = &axp20x_usb_power_pm_ops,
},
};
module_platform_driver(axp20x_usb_power_driver);
MODULE_AUTHOR("Hans de Goede <[email protected]>");
MODULE_DESCRIPTION("AXP20x PMIC USB power supply status driver");
MODULE_LICENSE("GPL");
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