power: supply: Add Spreadtrum SC2731 charger support
This patch adds the SC2731 PMIC switch charger support. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Baolin Wang
Sebastian Reichel
parent
8d1f326ab8
commit
1c3d7b0364
|
|
@ -645,4 +645,11 @@ config CHARGER_CROS_USBPD
|
|||
what is connected to USB PD ports from the EC and converts
|
||||
that into power_supply properties.
|
||||
|
||||
config CHARGER_SC2731
|
||||
tristate "Spreadtrum SC2731 charger driver"
|
||||
depends on MFD_SC27XX_PMIC || COMPILE_TEST
|
||||
help
|
||||
Say Y here to enable support for battery charging with SC2731
|
||||
PMIC chips.
|
||||
|
||||
endif # POWER_SUPPLY
|
||||
|
|
|
|||
|
|
@ -85,3 +85,4 @@ obj-$(CONFIG_CHARGER_TPS65217) += tps65217_charger.o
|
|||
obj-$(CONFIG_AXP288_FUEL_GAUGE) += axp288_fuel_gauge.o
|
||||
obj-$(CONFIG_AXP288_CHARGER) += axp288_charger.o
|
||||
obj-$(CONFIG_CHARGER_CROS_USBPD) += cros_usbpd-charger.o
|
||||
obj-$(CONFIG_CHARGER_SC2731) += sc2731_charger.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,504 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
// Copyright (C) 2018 Spreadtrum Communications Inc.
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/power_supply.h>
|
||||
#include <linux/usb/phy.h>
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/notifier.h>
|
||||
#include <linux/of.h>
|
||||
|
||||
/* PMIC global registers definition */
|
||||
#define SC2731_CHARGE_STATUS 0xedc
|
||||
#define SC2731_CHARGE_FULL BIT(4)
|
||||
#define SC2731_MODULE_EN1 0xc0c
|
||||
#define SC2731_CHARGE_EN BIT(5)
|
||||
|
||||
/* SC2731 switch charger registers definition */
|
||||
#define SC2731_CHG_CFG0 0x0
|
||||
#define SC2731_CHG_CFG1 0x4
|
||||
#define SC2731_CHG_CFG2 0x8
|
||||
#define SC2731_CHG_CFG3 0xc
|
||||
#define SC2731_CHG_CFG4 0x10
|
||||
#define SC2731_CHG_CFG5 0x28
|
||||
|
||||
/* SC2731_CHG_CFG0 register definition */
|
||||
#define SC2731_PRECHG_RNG_SHIFT 11
|
||||
#define SC2731_PRECHG_RNG_MASK GENMASK(12, 11)
|
||||
|
||||
#define SC2731_TERMINATION_VOL_MASK GENMASK(2, 1)
|
||||
#define SC2731_TERMINATION_VOL_SHIFT 1
|
||||
#define SC2731_TERMINATION_VOL_CAL_MASK GENMASK(8, 3)
|
||||
#define SC2731_TERMINATION_VOL_CAL_SHIFT 3
|
||||
#define SC2731_TERMINATION_CUR_MASK GENMASK(2, 0)
|
||||
|
||||
#define SC2731_CC_EN BIT(13)
|
||||
#define SC2731_CHARGER_PD BIT(0)
|
||||
|
||||
/* SC2731_CHG_CFG1 register definition */
|
||||
#define SC2731_CUR_MASK GENMASK(5, 0)
|
||||
|
||||
/* SC2731_CHG_CFG5 register definition */
|
||||
#define SC2731_CUR_LIMIT_SHIFT 8
|
||||
#define SC2731_CUR_LIMIT_MASK GENMASK(9, 8)
|
||||
|
||||
/* Default current definition (unit is mA) */
|
||||
#define SC2731_CURRENT_LIMIT_100 100
|
||||
#define SC2731_CURRENT_LIMIT_500 500
|
||||
#define SC2731_CURRENT_LIMIT_900 900
|
||||
#define SC2731_CURRENT_LIMIT_2000 2000
|
||||
#define SC2731_CURRENT_PRECHG 450
|
||||
#define SC2731_CURRENT_STEP 50
|
||||
|
||||
struct sc2731_charger_info {
|
||||
struct device *dev;
|
||||
struct regmap *regmap;
|
||||
struct usb_phy *usb_phy;
|
||||
struct notifier_block usb_notify;
|
||||
struct power_supply *psy_usb;
|
||||
struct mutex lock;
|
||||
bool charging;
|
||||
u32 base;
|
||||
};
|
||||
|
||||
static void sc2731_charger_stop_charge(struct sc2731_charger_info *info)
|
||||
{
|
||||
regmap_update_bits(info->regmap, info->base + SC2731_CHG_CFG0,
|
||||
SC2731_CC_EN, 0);
|
||||
|
||||
regmap_update_bits(info->regmap, info->base + SC2731_CHG_CFG0,
|
||||
SC2731_CHARGER_PD, SC2731_CHARGER_PD);
|
||||
}
|
||||
|
||||
static int sc2731_charger_start_charge(struct sc2731_charger_info *info)
|
||||
{
|
||||
int ret;
|
||||
|
||||
/* Enable charger constant current mode */
|
||||
ret = regmap_update_bits(info->regmap, info->base + SC2731_CHG_CFG0,
|
||||
SC2731_CC_EN, SC2731_CC_EN);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* Start charging */
|
||||
return regmap_update_bits(info->regmap, info->base + SC2731_CHG_CFG0,
|
||||
SC2731_CHARGER_PD, 0);
|
||||
}
|
||||
|
||||
static int sc2731_charger_set_current_limit(struct sc2731_charger_info *info,
|
||||
u32 limit)
|
||||
{
|
||||
u32 val;
|
||||
|
||||
if (limit <= SC2731_CURRENT_LIMIT_100)
|
||||
val = 0;
|
||||
else if (limit <= SC2731_CURRENT_LIMIT_500)
|
||||
val = 3;
|
||||
else if (limit <= SC2731_CURRENT_LIMIT_900)
|
||||
val = 2;
|
||||
else
|
||||
val = 1;
|
||||
|
||||
return regmap_update_bits(info->regmap, info->base + SC2731_CHG_CFG5,
|
||||
SC2731_CUR_LIMIT_MASK,
|
||||
val << SC2731_CUR_LIMIT_SHIFT);
|
||||
}
|
||||
|
||||
static int sc2731_charger_set_current(struct sc2731_charger_info *info, u32 cur)
|
||||
{
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
if (cur > SC2731_CURRENT_LIMIT_2000)
|
||||
cur = SC2731_CURRENT_LIMIT_2000;
|
||||
else if (cur < SC2731_CURRENT_PRECHG)
|
||||
cur = SC2731_CURRENT_PRECHG;
|
||||
|
||||
/* Calculate the step value, each step is 50 mA */
|
||||
val = (cur - SC2731_CURRENT_PRECHG) / SC2731_CURRENT_STEP;
|
||||
|
||||
/* Set pre-charge current as 450 mA */
|
||||
ret = regmap_update_bits(info->regmap, info->base + SC2731_CHG_CFG0,
|
||||
SC2731_PRECHG_RNG_MASK,
|
||||
0x3 << SC2731_PRECHG_RNG_SHIFT);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return regmap_update_bits(info->regmap, info->base + SC2731_CHG_CFG1,
|
||||
SC2731_CUR_MASK, val);
|
||||
}
|
||||
|
||||
static int sc2731_charger_get_status(struct sc2731_charger_info *info)
|
||||
{
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(info->regmap, SC2731_CHARGE_STATUS, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (val & SC2731_CHARGE_FULL)
|
||||
return POWER_SUPPLY_STATUS_FULL;
|
||||
|
||||
return POWER_SUPPLY_STATUS_CHARGING;
|
||||
}
|
||||
|
||||
static int sc2731_charger_get_current(struct sc2731_charger_info *info,
|
||||
u32 *cur)
|
||||
{
|
||||
int ret;
|
||||
u32 val;
|
||||
|
||||
ret = regmap_read(info->regmap, info->base + SC2731_CHG_CFG1, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
val &= SC2731_CUR_MASK;
|
||||
*cur = val * SC2731_CURRENT_STEP + SC2731_CURRENT_PRECHG;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sc2731_charger_get_current_limit(struct sc2731_charger_info *info,
|
||||
u32 *cur)
|
||||
{
|
||||
int ret;
|
||||
u32 val;
|
||||
|
||||
ret = regmap_read(info->regmap, info->base + SC2731_CHG_CFG5, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
val = (val & SC2731_CUR_LIMIT_MASK) >> SC2731_CUR_LIMIT_SHIFT;
|
||||
|
||||
switch (val) {
|
||||
case 0:
|
||||
*cur = SC2731_CURRENT_LIMIT_100;
|
||||
break;
|
||||
|
||||
case 1:
|
||||
*cur = SC2731_CURRENT_LIMIT_2000;
|
||||
break;
|
||||
|
||||
case 2:
|
||||
*cur = SC2731_CURRENT_LIMIT_900;
|
||||
break;
|
||||
|
||||
case 3:
|
||||
*cur = SC2731_CURRENT_LIMIT_500;
|
||||
break;
|
||||
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
sc2731_charger_usb_set_property(struct power_supply *psy,
|
||||
enum power_supply_property psp,
|
||||
const union power_supply_propval *val)
|
||||
{
|
||||
struct sc2731_charger_info *info = power_supply_get_drvdata(psy);
|
||||
int ret;
|
||||
|
||||
mutex_lock(&info->lock);
|
||||
|
||||
if (!info->charging) {
|
||||
mutex_unlock(&info->lock);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
||||
ret = sc2731_charger_set_current(info, val->intval / 1000);
|
||||
if (ret < 0)
|
||||
dev_err(info->dev, "set charge current failed\n");
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
||||
ret = sc2731_charger_set_current_limit(info,
|
||||
val->intval / 1000);
|
||||
if (ret < 0)
|
||||
dev_err(info->dev, "set input current limit failed\n");
|
||||
break;
|
||||
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
mutex_unlock(&info->lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int sc2731_charger_usb_get_property(struct power_supply *psy,
|
||||
enum power_supply_property psp,
|
||||
union power_supply_propval *val)
|
||||
{
|
||||
struct sc2731_charger_info *info = power_supply_get_drvdata(psy);
|
||||
int ret = 0;
|
||||
u32 cur;
|
||||
|
||||
mutex_lock(&info->lock);
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_STATUS:
|
||||
if (info->charging)
|
||||
val->intval = sc2731_charger_get_status(info);
|
||||
else
|
||||
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
||||
if (!info->charging) {
|
||||
val->intval = 0;
|
||||
} else {
|
||||
ret = sc2731_charger_get_current(info, &cur);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
val->intval = cur * 1000;
|
||||
}
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
||||
if (!info->charging) {
|
||||
val->intval = 0;
|
||||
} else {
|
||||
ret = sc2731_charger_get_current_limit(info, &cur);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
val->intval = cur * 1000;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
out:
|
||||
mutex_unlock(&info->lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int sc2731_charger_property_is_writeable(struct power_supply *psy,
|
||||
enum power_supply_property psp)
|
||||
{
|
||||
int ret;
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
||||
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
||||
ret = 1;
|
||||
break;
|
||||
|
||||
default:
|
||||
ret = 0;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static enum power_supply_property sc2731_usb_props[] = {
|
||||
POWER_SUPPLY_PROP_STATUS,
|
||||
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
|
||||
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
|
||||
};
|
||||
|
||||
static const struct power_supply_desc sc2731_charger_desc = {
|
||||
.name = "sc2731_charger",
|
||||
.type = POWER_SUPPLY_TYPE_USB,
|
||||
.properties = sc2731_usb_props,
|
||||
.num_properties = ARRAY_SIZE(sc2731_usb_props),
|
||||
.get_property = sc2731_charger_usb_get_property,
|
||||
.set_property = sc2731_charger_usb_set_property,
|
||||
.property_is_writeable = sc2731_charger_property_is_writeable,
|
||||
};
|
||||
|
||||
static int sc2731_charger_usb_change(struct notifier_block *nb,
|
||||
unsigned long limit, void *data)
|
||||
{
|
||||
struct sc2731_charger_info *info =
|
||||
container_of(nb, struct sc2731_charger_info, usb_notify);
|
||||
int ret = 0;
|
||||
|
||||
mutex_lock(&info->lock);
|
||||
|
||||
if (limit > 0) {
|
||||
/* set current limitation and start to charge */
|
||||
ret = sc2731_charger_set_current_limit(info, limit);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
ret = sc2731_charger_set_current(info, limit);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
ret = sc2731_charger_start_charge(info);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
info->charging = true;
|
||||
} else {
|
||||
/* Stop charging */
|
||||
info->charging = false;
|
||||
sc2731_charger_stop_charge(info);
|
||||
}
|
||||
|
||||
out:
|
||||
mutex_unlock(&info->lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int sc2731_charger_hw_init(struct sc2731_charger_info *info)
|
||||
{
|
||||
struct power_supply_battery_info bat_info = { };
|
||||
u32 term_currrent, term_voltage, cur_val, vol_val;
|
||||
int ret;
|
||||
|
||||
/* Enable charger module */
|
||||
ret = regmap_update_bits(info->regmap, SC2731_MODULE_EN1,
|
||||
SC2731_CHARGE_EN, SC2731_CHARGE_EN);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = power_supply_get_battery_info(info->psy_usb, &bat_info);
|
||||
if (ret) {
|
||||
dev_warn(info->dev, "no battery information is supplied\n");
|
||||
|
||||
/*
|
||||
* If no battery information is supplied, we should set
|
||||
* default charge termination current to 120 mA, and default
|
||||
* charge termination voltage to 4.35V.
|
||||
*/
|
||||
cur_val = 0x2;
|
||||
vol_val = 0x1;
|
||||
} else {
|
||||
term_currrent = bat_info.charge_term_current_ua / 1000;
|
||||
|
||||
if (term_currrent <= 90)
|
||||
cur_val = 0;
|
||||
else if (term_currrent >= 265)
|
||||
cur_val = 0x7;
|
||||
else
|
||||
cur_val = ((term_currrent - 90) / 25) + 1;
|
||||
|
||||
term_voltage = bat_info.constant_charge_voltage_max_uv / 1000;
|
||||
|
||||
if (term_voltage > 4500)
|
||||
term_voltage = 4500;
|
||||
|
||||
if (term_voltage > 4200)
|
||||
vol_val = (term_voltage - 4200) / 100;
|
||||
else
|
||||
vol_val = 0;
|
||||
}
|
||||
|
||||
/* Set charge termination current */
|
||||
ret = regmap_update_bits(info->regmap, info->base + SC2731_CHG_CFG2,
|
||||
SC2731_TERMINATION_CUR_MASK, cur_val);
|
||||
if (ret)
|
||||
goto error;
|
||||
|
||||
/* Set charge termination voltage */
|
||||
ret = regmap_update_bits(info->regmap, info->base + SC2731_CHG_CFG0,
|
||||
SC2731_TERMINATION_VOL_MASK |
|
||||
SC2731_TERMINATION_VOL_CAL_MASK,
|
||||
(vol_val << SC2731_TERMINATION_VOL_SHIFT) |
|
||||
(0x6 << SC2731_TERMINATION_VOL_CAL_SHIFT));
|
||||
if (ret)
|
||||
goto error;
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
regmap_update_bits(info->regmap, SC2731_MODULE_EN1, SC2731_CHARGE_EN, 0);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int sc2731_charger_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device_node *np = pdev->dev.of_node;
|
||||
struct sc2731_charger_info *info;
|
||||
struct power_supply_config charger_cfg = { };
|
||||
int ret;
|
||||
|
||||
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
||||
if (!info)
|
||||
return -ENOMEM;
|
||||
|
||||
mutex_init(&info->lock);
|
||||
info->dev = &pdev->dev;
|
||||
|
||||
info->regmap = dev_get_regmap(pdev->dev.parent, NULL);
|
||||
if (!info->regmap) {
|
||||
dev_err(&pdev->dev, "failed to get charger regmap\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
ret = of_property_read_u32(np, "reg", &info->base);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "failed to get register address\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
charger_cfg.drv_data = info;
|
||||
charger_cfg.of_node = np;
|
||||
info->psy_usb = devm_power_supply_register(&pdev->dev,
|
||||
&sc2731_charger_desc,
|
||||
&charger_cfg);
|
||||
if (IS_ERR(info->psy_usb)) {
|
||||
dev_err(&pdev->dev, "failed to register power supply\n");
|
||||
return PTR_ERR(info->psy_usb);
|
||||
}
|
||||
|
||||
ret = sc2731_charger_hw_init(info);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
info->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "phys", 0);
|
||||
if (IS_ERR(info->usb_phy)) {
|
||||
dev_err(&pdev->dev, "failed to find USB phy\n");
|
||||
return PTR_ERR(info->usb_phy);
|
||||
}
|
||||
|
||||
info->usb_notify.notifier_call = sc2731_charger_usb_change;
|
||||
ret = usb_register_notifier(info->usb_phy, &info->usb_notify);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "failed to register notifier: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sc2731_charger_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct sc2731_charger_info *info = platform_get_drvdata(pdev);
|
||||
|
||||
usb_unregister_notifier(info->usb_phy, &info->usb_notify);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id sc2731_charger_of_match[] = {
|
||||
{ .compatible = "sprd,sc2731-charger", },
|
||||
{ }
|
||||
};
|
||||
|
||||
static struct platform_driver sc2731_charger_driver = {
|
||||
.driver = {
|
||||
.name = "sc2731-charger",
|
||||
.of_match_table = sc2731_charger_of_match,
|
||||
},
|
||||
.probe = sc2731_charger_probe,
|
||||
.remove = sc2731_charger_remove,
|
||||
};
|
||||
|
||||
module_platform_driver(sc2731_charger_driver);
|
||||
|
||||
MODULE_DESCRIPTION("Spreadtrum SC2731 Charger Driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue