mirror of
https://github.com/torvalds/linux.git
synced 2026-06-04 12:35:52 +02:00
power: supply: max77759: add charger driver
Add support for MAX77759 battery charger driver. This is a 4A 1-Cell Li+/LiPoly dual input switch mode charger. While the device can support USB & wireless charger inputs, this implementation only supports USB input. This implementation supports both buck and boost modes. Signed-off-by: Amit Sunil Dhamne <amitsd@google.com> Reviewed-by: André Draszik <andre.draszik@linaro.org> Link: https://patch.msgid.link/20260325-max77759-charger-v9-5-4486dd297adc@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Amit Sunil Dhamne
Greg Kroah-Hartman
parent
f23388d0f6
commit
70d7dd27f6
|
|
@ -15708,6 +15708,12 @@ F: drivers/mfd/max77759.c
|
|||
F: drivers/nvmem/max77759-nvmem.c
|
||||
F: include/linux/mfd/max77759.h
|
||||
|
||||
MAXIM MAX77759 BATTERY CHARGER DRIVER
|
||||
M: Amit Sunil Dhamne <amitsd@google.com>
|
||||
L: linux-kernel@vger.kernel.org
|
||||
S: Maintained
|
||||
F: drivers/power/supply/max77759_charger.c
|
||||
|
||||
MAXIM MAX77802 PMIC REGULATOR DEVICE DRIVER
|
||||
M: Javier Martinez Canillas <javier@dowhile0.org>
|
||||
L: linux-kernel@vger.kernel.org
|
||||
|
|
|
|||
|
|
@ -631,6 +631,17 @@ config CHARGER_MAX77705
|
|||
help
|
||||
Say Y to enable support for the Maxim MAX77705 battery charger.
|
||||
|
||||
config CHARGER_MAX77759
|
||||
tristate "Maxim MAX77759 battery charger driver"
|
||||
depends on MFD_MAX77759 && REGULATOR
|
||||
default MFD_MAX77759
|
||||
help
|
||||
Say M or Y here to enable the MAX77759 battery charger. MAX77759
|
||||
charger is a function of the MAX77759 PMIC. This is a dual input
|
||||
switch-mode charger. This driver supports buck and OTG boost modes.
|
||||
|
||||
If built as a module, it will be called max77759_charger.
|
||||
|
||||
config CHARGER_MAX77976
|
||||
tristate "Maxim MAX77976 battery charger driver"
|
||||
depends on I2C
|
||||
|
|
|
|||
|
|
@ -128,3 +128,4 @@ obj-$(CONFIG_CHARGER_SURFACE) += surface_charger.o
|
|||
obj-$(CONFIG_BATTERY_UG3105) += ug3105_battery.o
|
||||
obj-$(CONFIG_CHARGER_QCOM_SMB2) += qcom_smbx.o
|
||||
obj-$(CONFIG_FUEL_GAUGE_MM8013) += mm8013.o
|
||||
obj-$(CONFIG_CHARGER_MAX77759) += max77759_charger.o
|
||||
|
|
|
|||
774
drivers/power/supply/max77759_charger.c
Normal file
774
drivers/power/supply/max77759_charger.c
Normal file
|
|
@ -0,0 +1,774 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* max77759_charger.c - Battery charger driver for MAX77759 charger device.
|
||||
*
|
||||
* Copyright 2025 Google LLC.
|
||||
*/
|
||||
|
||||
#include <linux/bitfield.h>
|
||||
#include <linux/cleanup.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/devm-helpers.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/linear_range.h>
|
||||
#include <linux/mfd/max77759.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/mod_devicetable.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/power_supply.h>
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/regulator/driver.h>
|
||||
#include <linux/string_choices.h>
|
||||
#include <linux/workqueue.h>
|
||||
|
||||
/* Default values for Fast Charge Current & Float Voltage */
|
||||
#define CHG_CC_DEFAULT_UA 2266770
|
||||
#define CHG_FV_DEFAULT_MV 4300
|
||||
|
||||
#define MAX_NUM_RETRIES 3
|
||||
#define PSY_WORK_RETRY_DELAY_MS 10
|
||||
|
||||
#define FOREACH_IRQ(S) \
|
||||
S(AICL), \
|
||||
S(CHGIN), \
|
||||
S(CHG), \
|
||||
S(INLIM), \
|
||||
S(BAT_OILO), \
|
||||
S(CHG_STA_CC), \
|
||||
S(CHG_STA_CV), \
|
||||
S(CHG_STA_TO), \
|
||||
S(CHG_STA_DONE)
|
||||
|
||||
#define GENERATE_ENUM(e) e
|
||||
#define GENERATE_STRING(s) #s
|
||||
|
||||
enum {
|
||||
FOREACH_IRQ(GENERATE_ENUM)
|
||||
};
|
||||
|
||||
static const char *const chgr_irqs_str[] = {
|
||||
FOREACH_IRQ(GENERATE_STRING)
|
||||
};
|
||||
|
||||
#define NUM_IRQS ARRAY_SIZE(chgr_irqs_str)
|
||||
|
||||
/* Fast charge current limits (in uA) */
|
||||
static const struct linear_range chgcc_limit_ranges[] = {
|
||||
LINEAR_RANGE(133330, 0x0, 0x2, 0),
|
||||
LINEAR_RANGE(200000, 0x3, 0x3C, 66670),
|
||||
};
|
||||
|
||||
/* Charge Termination Voltage Limits (in mV) */
|
||||
static const struct linear_range chg_cv_prm_ranges[] = {
|
||||
LINEAR_RANGE(3800, 0x38, 0x39, 100),
|
||||
LINEAR_RANGE(4000, 0x0, 0x32, 10),
|
||||
};
|
||||
|
||||
/* USB input current limits (in uA) */
|
||||
static const struct linear_range chgin_ilim_ranges[] = {
|
||||
LINEAR_RANGE(100000, 0x3, 0x7F, 25000),
|
||||
};
|
||||
|
||||
struct max77759_charger {
|
||||
struct device *dev;
|
||||
struct regmap *regmap;
|
||||
struct power_supply *psy;
|
||||
struct regulator_dev *chgin_otg_rdev;
|
||||
struct notifier_block nb;
|
||||
struct power_supply *tcpm_psy;
|
||||
struct delayed_work psy_work;
|
||||
struct mutex retry_lock; /* Protects psy_work_retry_cnt */
|
||||
u32 psy_work_retry_cnt;
|
||||
int irqs[NUM_IRQS];
|
||||
struct mutex lock; /* protects the state below */
|
||||
enum max77759_chgr_mode mode;
|
||||
};
|
||||
|
||||
static inline int unlock_prot_regs(struct max77759_charger *chg, bool unlock)
|
||||
{
|
||||
return regmap_update_bits(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_06,
|
||||
MAX77759_CHGR_REG_CHG_CNFG_06_CHGPROT, unlock
|
||||
? MAX77759_CHGR_REG_CHG_CNFG_06_CHGPROT : 0);
|
||||
}
|
||||
|
||||
static int charger_input_valid(struct max77759_charger *chg)
|
||||
{
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_INT_OK, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return (val & MAX77759_CHGR_REG_CHG_INT_CHG) &&
|
||||
(val & MAX77759_CHGR_REG_CHG_INT_CHGIN);
|
||||
}
|
||||
|
||||
static int get_online(struct max77759_charger *chg)
|
||||
{
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = charger_input_valid(chg);
|
||||
if (ret <= 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_DETAILS_02, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
guard(mutex)(&chg->lock);
|
||||
|
||||
return (val & MAX77759_CHGR_REG_CHG_DETAILS_02_CHGIN_STS) &&
|
||||
(chg->mode == MAX77759_CHGR_MODE_CHG_BUCK_ON);
|
||||
}
|
||||
|
||||
static int get_status(struct max77759_charger *chg)
|
||||
{
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_DETAILS_01, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
switch (FIELD_GET(MAX77759_CHGR_REG_CHG_DETAILS_01_CHG_DTLS, val)) {
|
||||
case MAX77759_CHGR_CHG_DTLS_PREQUAL:
|
||||
case MAX77759_CHGR_CHG_DTLS_CC:
|
||||
case MAX77759_CHGR_CHG_DTLS_CV:
|
||||
case MAX77759_CHGR_CHG_DTLS_TO:
|
||||
return POWER_SUPPLY_STATUS_CHARGING;
|
||||
case MAX77759_CHGR_CHG_DTLS_DONE:
|
||||
return POWER_SUPPLY_STATUS_FULL;
|
||||
case MAX77759_CHGR_CHG_DTLS_TIMER_FAULT:
|
||||
case MAX77759_CHGR_CHG_DTLS_SUSP_BATT_THM:
|
||||
case MAX77759_CHGR_CHG_DTLS_OFF_WDOG_TIMER:
|
||||
case MAX77759_CHGR_CHG_DTLS_SUSP_JEITA:
|
||||
return POWER_SUPPLY_STATUS_NOT_CHARGING;
|
||||
case MAX77759_CHGR_CHG_DTLS_OFF:
|
||||
return POWER_SUPPLY_STATUS_DISCHARGING;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return POWER_SUPPLY_STATUS_UNKNOWN;
|
||||
}
|
||||
|
||||
static int get_charge_type(struct max77759_charger *chg)
|
||||
{
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_DETAILS_01, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
switch (FIELD_GET(MAX77759_CHGR_REG_CHG_DETAILS_01_CHG_DTLS, val)) {
|
||||
case MAX77759_CHGR_CHG_DTLS_PREQUAL:
|
||||
return POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
|
||||
case MAX77759_CHGR_CHG_DTLS_CC:
|
||||
case MAX77759_CHGR_CHG_DTLS_CV:
|
||||
return POWER_SUPPLY_CHARGE_TYPE_FAST;
|
||||
case MAX77759_CHGR_CHG_DTLS_TO:
|
||||
return POWER_SUPPLY_CHARGE_TYPE_STANDARD;
|
||||
case MAX77759_CHGR_CHG_DTLS_DONE:
|
||||
case MAX77759_CHGR_CHG_DTLS_TIMER_FAULT:
|
||||
case MAX77759_CHGR_CHG_DTLS_SUSP_BATT_THM:
|
||||
case MAX77759_CHGR_CHG_DTLS_OFF_WDOG_TIMER:
|
||||
case MAX77759_CHGR_CHG_DTLS_SUSP_JEITA:
|
||||
case MAX77759_CHGR_CHG_DTLS_OFF:
|
||||
return POWER_SUPPLY_CHARGE_TYPE_NONE;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
|
||||
}
|
||||
|
||||
static int get_chg_health(struct max77759_charger *chg)
|
||||
{
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_DETAILS_00, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
switch (FIELD_GET(MAX77759_CHGR_REG_CHG_DETAILS_00_CHGIN_DTLS, val)) {
|
||||
case MAX77759_CHGR_CHGIN_DTLS_VBUS_UNDERVOLTAGE:
|
||||
case MAX77759_CHGR_CHGIN_DTLS_VBUS_MARGINAL_VOLTAGE:
|
||||
return POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
|
||||
case MAX77759_CHGR_CHGIN_DTLS_VBUS_OVERVOLTAGE:
|
||||
return POWER_SUPPLY_HEALTH_OVERVOLTAGE;
|
||||
case MAX77759_CHGR_CHGIN_DTLS_VBUS_VALID:
|
||||
return POWER_SUPPLY_HEALTH_GOOD;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return POWER_SUPPLY_HEALTH_UNKNOWN;
|
||||
}
|
||||
|
||||
static int get_batt_health(struct max77759_charger *chg)
|
||||
{
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_DETAILS_01, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
switch (FIELD_GET(MAX77759_CHGR_REG_CHG_DETAILS_01_BAT_DTLS, val)) {
|
||||
case MAX77759_CHGR_BAT_DTLS_NO_BATT_CHG_SUSP:
|
||||
return POWER_SUPPLY_HEALTH_NO_BATTERY;
|
||||
case MAX77759_CHGR_BAT_DTLS_DEAD_BATTERY:
|
||||
return POWER_SUPPLY_HEALTH_DEAD;
|
||||
case MAX77759_CHGR_BAT_DTLS_BAT_CHG_TIMER_FAULT:
|
||||
return POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
|
||||
case MAX77759_CHGR_BAT_DTLS_BAT_OKAY:
|
||||
case MAX77759_CHGR_BAT_DTLS_BAT_ONLY_MODE:
|
||||
return POWER_SUPPLY_HEALTH_GOOD;
|
||||
case MAX77759_CHGR_BAT_DTLS_BAT_UNDERVOLTAGE:
|
||||
return POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
|
||||
case MAX77759_CHGR_BAT_DTLS_BAT_OVERVOLTAGE:
|
||||
return POWER_SUPPLY_HEALTH_OVERVOLTAGE;
|
||||
case MAX77759_CHGR_BAT_DTLS_BAT_OVERCURRENT:
|
||||
return POWER_SUPPLY_HEALTH_OVERCURRENT;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return POWER_SUPPLY_HEALTH_UNKNOWN;
|
||||
}
|
||||
|
||||
static int get_health(struct max77759_charger *chg)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = get_online(chg);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (ret) {
|
||||
ret = get_chg_health(chg);
|
||||
if (ret < 0 || ret != POWER_SUPPLY_HEALTH_GOOD)
|
||||
return ret;
|
||||
}
|
||||
|
||||
return get_batt_health(chg);
|
||||
}
|
||||
|
||||
static int get_fast_charge_current(struct max77759_charger *chg)
|
||||
{
|
||||
u32 regval, val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_02, ®val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
regval = FIELD_GET(MAX77759_CHGR_REG_CHG_CNFG_02_CHGCC, regval);
|
||||
ret = linear_range_get_value_array(chgcc_limit_ranges,
|
||||
ARRAY_SIZE(chgcc_limit_ranges),
|
||||
regval, &val);
|
||||
return ret ? ret : val;
|
||||
}
|
||||
|
||||
static int set_fast_charge_current_limit(struct max77759_charger *chg,
|
||||
u32 cc_max_ua)
|
||||
{
|
||||
bool found;
|
||||
u32 regval;
|
||||
|
||||
linear_range_get_selector_high_array(chgcc_limit_ranges,
|
||||
ARRAY_SIZE(chgcc_limit_ranges),
|
||||
cc_max_ua, ®val, &found);
|
||||
if (!found)
|
||||
return -EINVAL;
|
||||
|
||||
return regmap_update_bits(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_02,
|
||||
MAX77759_CHGR_REG_CHG_CNFG_02_CHGCC, regval);
|
||||
}
|
||||
|
||||
static int get_float_voltage(struct max77759_charger *chg)
|
||||
{
|
||||
u32 regval, val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_04, ®val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
regval = FIELD_GET(MAX77759_CHGR_REG_CHG_CNFG_04_CHG_CV_PRM, regval);
|
||||
ret = linear_range_get_value_array(chg_cv_prm_ranges,
|
||||
ARRAY_SIZE(chg_cv_prm_ranges),
|
||||
regval, &val);
|
||||
|
||||
return ret ? ret : val;
|
||||
}
|
||||
|
||||
static int set_float_voltage_limit(struct max77759_charger *chg, u32 fv_mv)
|
||||
{
|
||||
u32 regval;
|
||||
bool found;
|
||||
|
||||
linear_range_get_selector_high_array(chg_cv_prm_ranges,
|
||||
ARRAY_SIZE(chg_cv_prm_ranges),
|
||||
fv_mv, ®val, &found);
|
||||
if (!found)
|
||||
return -EINVAL;
|
||||
|
||||
return regmap_update_bits(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_04,
|
||||
MAX77759_CHGR_REG_CHG_CNFG_04_CHG_CV_PRM,
|
||||
regval);
|
||||
}
|
||||
|
||||
static int get_input_current_limit(struct max77759_charger *chg)
|
||||
{
|
||||
u32 regval, val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_09, ®val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
regval = FIELD_GET(MAX77759_CHGR_REG_CHG_CNFG_09_CHGIN_ILIM, regval);
|
||||
regval = umax(regval, chgin_ilim_ranges[0].min_sel);
|
||||
|
||||
ret = linear_range_get_value_array(chgin_ilim_ranges,
|
||||
ARRAY_SIZE(chgin_ilim_ranges),
|
||||
regval, &val);
|
||||
|
||||
return ret ? ret : val;
|
||||
}
|
||||
|
||||
static int set_input_current_limit(struct max77759_charger *chg, int ilim_ua)
|
||||
{
|
||||
u32 regval;
|
||||
|
||||
if (ilim_ua < 0)
|
||||
return -EINVAL;
|
||||
|
||||
linear_range_get_selector_within(chgin_ilim_ranges, ilim_ua, ®val);
|
||||
|
||||
return regmap_update_bits(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_09,
|
||||
MAX77759_CHGR_REG_CHG_CNFG_09_CHGIN_ILIM,
|
||||
regval);
|
||||
}
|
||||
|
||||
static const enum power_supply_property max77759_charger_props[] = {
|
||||
POWER_SUPPLY_PROP_ONLINE,
|
||||
POWER_SUPPLY_PROP_PRESENT,
|
||||
POWER_SUPPLY_PROP_STATUS,
|
||||
POWER_SUPPLY_PROP_CHARGE_TYPE,
|
||||
POWER_SUPPLY_PROP_HEALTH,
|
||||
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
|
||||
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
|
||||
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
|
||||
};
|
||||
|
||||
static int max77759_charger_get_property(struct power_supply *psy,
|
||||
enum power_supply_property psp,
|
||||
union power_supply_propval *pval)
|
||||
{
|
||||
struct max77759_charger *chg = power_supply_get_drvdata(psy);
|
||||
int ret;
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_ONLINE:
|
||||
ret = get_online(chg);
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_PRESENT:
|
||||
ret = charger_input_valid(chg);
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_STATUS:
|
||||
ret = get_status(chg);
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_CHARGE_TYPE:
|
||||
ret = get_charge_type(chg);
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_HEALTH:
|
||||
ret = get_health(chg);
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
|
||||
ret = get_fast_charge_current(chg);
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
|
||||
ret = get_float_voltage(chg);
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
||||
ret = get_input_current_limit(chg);
|
||||
break;
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
pval->intval = ret;
|
||||
return ret < 0 ? ret : 0;
|
||||
}
|
||||
|
||||
static const struct power_supply_desc max77759_charger_desc = {
|
||||
.name = "max77759-charger",
|
||||
.type = POWER_SUPPLY_TYPE_USB,
|
||||
.properties = max77759_charger_props,
|
||||
.num_properties = ARRAY_SIZE(max77759_charger_props),
|
||||
.get_property = max77759_charger_get_property,
|
||||
};
|
||||
|
||||
static int charger_set_mode(struct max77759_charger *chg,
|
||||
enum max77759_chgr_mode mode)
|
||||
{
|
||||
int ret;
|
||||
|
||||
guard(mutex)(&chg->lock);
|
||||
|
||||
if (chg->mode == mode)
|
||||
return 0;
|
||||
|
||||
if ((mode == MAX77759_CHGR_MODE_CHG_BUCK_ON ||
|
||||
mode == MAX77759_CHGR_MODE_OTG_BOOST_ON) &&
|
||||
chg->mode != MAX77759_CHGR_MODE_OFF) {
|
||||
dev_err(chg->dev, "Invalid mode transition from %d to %d\n",
|
||||
chg->mode, mode);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = regmap_update_bits(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_00,
|
||||
MAX77759_CHGR_REG_CHG_CNFG_00_MODE, mode);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
chg->mode = mode;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int enable_chgin_otg(struct regulator_dev *rdev)
|
||||
{
|
||||
struct max77759_charger *chg = rdev_get_drvdata(rdev);
|
||||
|
||||
return charger_set_mode(chg, MAX77759_CHGR_MODE_OTG_BOOST_ON);
|
||||
}
|
||||
|
||||
static int disable_chgin_otg(struct regulator_dev *rdev)
|
||||
{
|
||||
struct max77759_charger *chg = rdev_get_drvdata(rdev);
|
||||
|
||||
return charger_set_mode(chg, MAX77759_CHGR_MODE_OFF);
|
||||
}
|
||||
|
||||
static int chgin_otg_status(struct regulator_dev *rdev)
|
||||
{
|
||||
struct max77759_charger *chg = rdev_get_drvdata(rdev);
|
||||
|
||||
guard(mutex)(&chg->lock);
|
||||
|
||||
return chg->mode == MAX77759_CHGR_MODE_OTG_BOOST_ON;
|
||||
}
|
||||
|
||||
static const struct regulator_ops chgin_otg_reg_ops = {
|
||||
.enable = enable_chgin_otg,
|
||||
.disable = disable_chgin_otg,
|
||||
.is_enabled = chgin_otg_status,
|
||||
};
|
||||
|
||||
static const struct regulator_desc chgin_otg_reg_desc = {
|
||||
.name = "chgin-otg",
|
||||
.of_match = of_match_ptr("chgin-otg-regulator"),
|
||||
.owner = THIS_MODULE,
|
||||
.ops = &chgin_otg_reg_ops,
|
||||
.fixed_uV = 5000000,
|
||||
.n_voltages = 1,
|
||||
};
|
||||
|
||||
static irqreturn_t irq_handler(int irq, void *data)
|
||||
{
|
||||
struct max77759_charger *chg = data;
|
||||
|
||||
power_supply_changed(chg->psy);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t bat_oilo_irq_handler(int irq, void *data)
|
||||
{
|
||||
struct max77759_charger *chg = data;
|
||||
|
||||
dev_warn_ratelimited(chg->dev,
|
||||
"Battery over-current threshold crossed\n");
|
||||
|
||||
return irq_handler(irq, data);
|
||||
}
|
||||
|
||||
static int max77759_init_irqhandler(struct max77759_charger *chg)
|
||||
{
|
||||
struct device *dev = chg->dev;
|
||||
irq_handler_t thread_fn;
|
||||
char *name;
|
||||
int i, ret;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(chgr_irqs_str); i++) {
|
||||
ret = platform_get_irq_byname(to_platform_device(dev),
|
||||
chgr_irqs_str[i]);
|
||||
if (ret < 0)
|
||||
return dev_err_probe(dev, ret,
|
||||
"Failed to get irq resource for %s\n",
|
||||
chgr_irqs_str[i]);
|
||||
|
||||
chg->irqs[i] = ret;
|
||||
name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", dev_name(dev),
|
||||
chgr_irqs_str[i]);
|
||||
if (!name)
|
||||
return dev_err_probe(dev, -ENOMEM,
|
||||
"Failed to allocate space for irqname: %s\n",
|
||||
chgr_irqs_str[i]);
|
||||
|
||||
if (i == BAT_OILO)
|
||||
thread_fn = bat_oilo_irq_handler;
|
||||
else
|
||||
thread_fn = irq_handler;
|
||||
|
||||
ret = devm_request_threaded_irq(dev, chg->irqs[i], NULL,
|
||||
thread_fn, 0, name, chg);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret,
|
||||
"Unable to register irq handler for %s\n",
|
||||
chgr_irqs_str[i]);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int max77759_charger_init(struct max77759_charger *chg)
|
||||
{
|
||||
struct power_supply_battery_info *info;
|
||||
u32 regval, fast_chg_curr, fv;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_00, ®val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
chg->mode = FIELD_GET(MAX77759_CHGR_REG_CHG_CNFG_00_MODE, regval);
|
||||
ret = charger_set_mode(chg, MAX77759_CHGR_MODE_OFF);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (power_supply_get_battery_info(chg->psy, &info)) {
|
||||
fv = CHG_FV_DEFAULT_MV;
|
||||
fast_chg_curr = CHG_CC_DEFAULT_UA;
|
||||
} else {
|
||||
fv = info->constant_charge_voltage_max_uv / 1000;
|
||||
fast_chg_curr = info->constant_charge_current_max_ua;
|
||||
}
|
||||
|
||||
ret = set_fast_charge_current_limit(chg, fast_chg_curr);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = set_float_voltage_limit(chg, fv);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = unlock_prot_regs(chg, true);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* Disable wireless charging input */
|
||||
ret = regmap_update_bits(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_12,
|
||||
MAX77759_CHGR_REG_CHG_CNFG_12_WCINSEL, 0);
|
||||
if (ret)
|
||||
goto relock;
|
||||
|
||||
ret = regmap_update_bits(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_18,
|
||||
MAX77759_CHGR_REG_CHG_CNFG_18_WDTEN, 0);
|
||||
if (ret)
|
||||
goto relock;
|
||||
|
||||
return unlock_prot_regs(chg, false);
|
||||
|
||||
relock:
|
||||
(void)unlock_prot_regs(chg, false);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void psy_work_item(struct work_struct *work)
|
||||
{
|
||||
struct max77759_charger *chg =
|
||||
container_of(work, struct max77759_charger, psy_work.work);
|
||||
union power_supply_propval current_limit, online;
|
||||
int ret;
|
||||
|
||||
ret = power_supply_get_property(chg->tcpm_psy,
|
||||
POWER_SUPPLY_PROP_CURRENT_MAX,
|
||||
¤t_limit);
|
||||
if (ret) {
|
||||
dev_err(chg->dev,
|
||||
"Failed to get CURRENT_MAX psy property, ret=%d\n",
|
||||
ret);
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = power_supply_get_property(chg->tcpm_psy, POWER_SUPPLY_PROP_ONLINE,
|
||||
&online);
|
||||
if (ret) {
|
||||
dev_err(chg->dev,
|
||||
"Failed to get ONLINE psy property, ret=%d\n",
|
||||
ret);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (online.intval && current_limit.intval) {
|
||||
ret = set_input_current_limit(chg, current_limit.intval);
|
||||
if (ret) {
|
||||
dev_err(chg->dev,
|
||||
"Unable to set current limit, ret=%d\n", ret);
|
||||
goto err;
|
||||
}
|
||||
|
||||
charger_set_mode(chg, MAX77759_CHGR_MODE_CHG_BUCK_ON);
|
||||
} else {
|
||||
charger_set_mode(chg, MAX77759_CHGR_MODE_OFF);
|
||||
}
|
||||
|
||||
scoped_guard(mutex, &chg->retry_lock) {
|
||||
if (chg->psy_work_retry_cnt)
|
||||
dev_dbg(chg->dev,
|
||||
"chg psy_work succeeded after %u tries\n",
|
||||
chg->psy_work_retry_cnt);
|
||||
chg->psy_work_retry_cnt = 0;
|
||||
}
|
||||
|
||||
return;
|
||||
|
||||
err:
|
||||
charger_set_mode(chg, MAX77759_CHGR_MODE_OFF);
|
||||
scoped_guard(mutex, &chg->retry_lock) {
|
||||
if (chg->psy_work_retry_cnt >= MAX_NUM_RETRIES) {
|
||||
dev_err(chg->dev, "chg psy work failed, giving up\n");
|
||||
return;
|
||||
}
|
||||
|
||||
++chg->psy_work_retry_cnt;
|
||||
dev_dbg(chg->dev, "Retrying %u/%u chg psy_work\n",
|
||||
chg->psy_work_retry_cnt, MAX_NUM_RETRIES);
|
||||
schedule_delayed_work(&chg->psy_work,
|
||||
msecs_to_jiffies(PSY_WORK_RETRY_DELAY_MS));
|
||||
}
|
||||
}
|
||||
|
||||
static int psy_changed(struct notifier_block *nb, unsigned long evt, void *data)
|
||||
{
|
||||
struct max77759_charger *chg = container_of(nb, struct max77759_charger,
|
||||
nb);
|
||||
static const char *psy_name = "tcpm-source";
|
||||
struct power_supply *psy = data;
|
||||
|
||||
if (!strnstr(psy->desc->name, psy_name, strlen(psy_name)) ||
|
||||
evt != PSY_EVENT_PROP_CHANGED)
|
||||
return NOTIFY_OK;
|
||||
|
||||
chg->tcpm_psy = psy;
|
||||
scoped_guard(mutex, &chg->retry_lock)
|
||||
chg->psy_work_retry_cnt = 0;
|
||||
|
||||
schedule_delayed_work(&chg->psy_work, 0);
|
||||
|
||||
return NOTIFY_OK;
|
||||
}
|
||||
|
||||
static void max_tcpci_unregister_psy_notifier(void *nb)
|
||||
{
|
||||
power_supply_unreg_notifier(nb);
|
||||
}
|
||||
|
||||
static int max77759_charger_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct regulator_config chgin_otg_reg_cfg;
|
||||
struct power_supply_config psy_cfg;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct max77759_charger *chg;
|
||||
int ret;
|
||||
|
||||
device_set_of_node_from_dev(dev, dev->parent);
|
||||
chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL);
|
||||
if (!chg)
|
||||
return -ENOMEM;
|
||||
|
||||
platform_set_drvdata(pdev, chg);
|
||||
chg->dev = dev;
|
||||
chg->regmap = dev_get_regmap(dev->parent, "charger");
|
||||
if (!chg->regmap)
|
||||
return dev_err_probe(dev, -ENODEV, "Missing regmap\n");
|
||||
|
||||
ret = devm_mutex_init(dev, &chg->lock);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to initialize lock\n");
|
||||
|
||||
ret = devm_mutex_init(dev, &chg->retry_lock);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret,
|
||||
"Failed to initialize retry_lock\n");
|
||||
|
||||
psy_cfg.fwnode = dev_fwnode(dev);
|
||||
psy_cfg.drv_data = chg;
|
||||
chg->psy = devm_power_supply_register(dev, &max77759_charger_desc,
|
||||
&psy_cfg);
|
||||
if (IS_ERR(chg->psy))
|
||||
return dev_err_probe(dev, PTR_ERR(chg->psy),
|
||||
"Failed to register psy\n");
|
||||
|
||||
ret = max77759_charger_init(chg);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret,
|
||||
"Failed to initialize max77759 charger\n");
|
||||
|
||||
chgin_otg_reg_cfg.dev = dev;
|
||||
chgin_otg_reg_cfg.driver_data = chg;
|
||||
chgin_otg_reg_cfg.of_node = dev_of_node(dev);
|
||||
chg->chgin_otg_rdev = devm_regulator_register(dev, &chgin_otg_reg_desc,
|
||||
&chgin_otg_reg_cfg);
|
||||
if (IS_ERR(chg->chgin_otg_rdev))
|
||||
return dev_err_probe(dev, PTR_ERR(chg->chgin_otg_rdev),
|
||||
"Failed to register chgin otg regulator\n");
|
||||
|
||||
ret = devm_delayed_work_autocancel(dev, &chg->psy_work, psy_work_item);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to initialize psy work\n");
|
||||
|
||||
chg->nb.notifier_call = psy_changed;
|
||||
ret = power_supply_reg_notifier(&chg->nb);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret,
|
||||
"Unable to register psy notifier\n");
|
||||
|
||||
ret = devm_add_action_or_reset(dev, max_tcpci_unregister_psy_notifier,
|
||||
&chg->nb);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret,
|
||||
"Failed to add devm action to unregister psy notifier\n");
|
||||
|
||||
return max77759_init_irqhandler(chg);
|
||||
}
|
||||
|
||||
static const struct platform_device_id max77759_charger_id[] = {
|
||||
{ .name = "max77759-charger", },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(platform, max77759_charger_id);
|
||||
|
||||
static struct platform_driver max77759_charger_driver = {
|
||||
.driver = {
|
||||
.name = "max77759-charger",
|
||||
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
||||
},
|
||||
.probe = max77759_charger_probe,
|
||||
.id_table = max77759_charger_id,
|
||||
};
|
||||
module_platform_driver(max77759_charger_driver);
|
||||
|
||||
MODULE_AUTHOR("Amit Sunil Dhamne <amitsd@google.com>");
|
||||
MODULE_DESCRIPTION("Maxim MAX77759 charger driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user