--- /dev/null
+What: /sys/class/power_supply/twl4030_ac/max_current
+ /sys/class/power_supply/twl4030_usb/max_current
+Description:
+ Read/Write limit on current which may
+ be drawn from the ac (Accessory Charger) or
+ USB port.
+
+ Value is in micro-Amps.
+
+ Value is set automatically to an appropriate
+ value when a cable is plugged or unplugged.
+
+ Value can the set by writing to the attribute.
+ The change will only persist until the next
+ plug event. These event are reported via udev.
+
+
+What: /sys/class/power_supply/twl4030_usb/mode
+Description:
+ Changing mode for USB port.
+ Writing to this can disable charging.
+
+ Possible values are:
+ "auto" - draw power as appropriate for detected
+ power source and battery status.
+ "off" - do not draw any power.
+ "continuous"
+ - activate mode described as "linear" in
+ TWL data sheets. This uses whatever
+ current is available and doesn't switch off
+ when voltage drops.
+
+ This is useful for unstable power sources
+ such as bicycle dynamo, but care should
+ be taken that battery is not over-charged.
+
+What: /sys/class/power_supply/twl4030_ac/mode
+Description:
+ Changing mode for 'ac' port.
+ Writing to this can disable charging.
+
+ Possible values are:
+ "auto" - draw power as appropriate for detected
+ power source and battery status.
+ "off" - do not draw any power.
RSTC Reset Controller required properties:
- compatible: Should be "atmel,<chip>-rstc".
- <chip> can be "at91sam9260" or "at91sam9g45"
+ <chip> can be "at91sam9260" or "at91sam9g45" or "sama5d3"
- reg: Should contain registers location and length
Example:
S: Maintained
F: include/linux/power_supply.h
F: drivers/power/
+X: drivers/power/avs/
PNP SUPPORT
M: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
static struct regulator_consumer_supply usb1v8 = {
.supply = "usb1v8",
};
- static struct regulator_consumer_supply usb3v1[] = {
- { .supply = "usb3v1" },
- { .supply = "bci3v1" },
+ static struct regulator_consumer_supply usb3v1 = {
+ .supply = "usb3v1",
};
/* First add the regulators so that they can be used by transceiver */
return PTR_ERR(child);
child = add_regulator_linked(TWL4030_REG_VUSB3V1,
- &usb_fixed, usb3v1, 2,
+ &usb_fixed, &usb3v1, 1,
features);
if (IS_ERR(child))
return PTR_ERR(child);
if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
usb1v5.dev_name = dev_name(child);
usb1v8.dev_name = dev_name(child);
- usb3v1[0].dev_name = dev_name(child);
+ usb3v1.dev_name = dev_name(child);
}
}
config CHARGER_GPIO
tristate "GPIO charger"
- depends on GPIOLIB
+ depends on GPIOLIB || COMPILE_TEST
help
Say Y to include support for chargers which report their online status
through a GPIO pin.
config CHARGER_BQ24190
tristate "TI BQ24190 battery charger driver"
- depends on I2C && GPIOLIB
+ depends on I2C
+ depends on GPIOLIB || COMPILE_TEST
help
Say Y to enable support for the TI BQ24190 battery charger.
config CHARGER_BQ24257
tristate "TI BQ24257 battery charger driver"
- depends on I2C && GPIOLIB
+ depends on I2C
+ depends on GPIOLIB || COMPILE_TEST
depends on REGMAP_I2C
help
Say Y to enable support for the TI BQ24257 battery charger.
config CHARGER_BQ24735
tristate "TI BQ24735 battery charger support"
- depends on I2C && GPIOLIB
+ depends on I2C
+ depends on GPIOLIB || COMPILE_TEST
help
Say Y to enable support for the TI BQ24735 battery charger.
config CHARGER_BQ25890
tristate "TI BQ25890 battery charger driver"
- depends on I2C && GPIOLIB
+ depends on I2C
+ depends on GPIOLIB || COMPILE_TEST
select REGMAP_I2C
help
Say Y to enable support for the TI BQ25890 battery charger.
config CHARGER_RT9455
tristate "Richtek RT9455 battery charger driver"
- depends on I2C && GPIOLIB
+ depends on I2C
+ depends on GPIOLIB || COMPILE_TEST
select REGMAP_I2C
help
Say Y to enable support for Richtek RT9455 battery charger.
struct power_supply *charger;
struct power_supply_desc charger_desc;
struct delayed_work work;
- struct power_supply *notify_psy;
+ struct device_node *notify_node;
struct notifier_block nb;
enum bq2415x_mode reported_mode;/* mode reported by hook function */
enum bq2415x_mode mode; /* currently configured mode */
}
+static bool bq2415x_update_reported_mode(struct bq2415x_device *bq, int mA)
+{
+ enum bq2415x_mode mode;
+
+ if (mA == 0)
+ mode = BQ2415X_MODE_OFF;
+ else if (mA < 500)
+ mode = BQ2415X_MODE_NONE;
+ else if (mA < 1800)
+ mode = BQ2415X_MODE_HOST_CHARGER;
+ else
+ mode = BQ2415X_MODE_DEDICATED_CHARGER;
+
+ if (bq->reported_mode == mode)
+ return false;
+
+ bq->reported_mode = mode;
+ return true;
+}
+
static int bq2415x_notifier_call(struct notifier_block *nb,
unsigned long val, void *v)
{
struct bq2415x_device *bq =
container_of(nb, struct bq2415x_device, nb);
struct power_supply *psy = v;
- enum bq2415x_mode mode;
union power_supply_propval prop;
int ret;
- int mA;
if (val != PSY_EVENT_PROP_CHANGED)
return NOTIFY_OK;
- if (psy != bq->notify_psy)
- return NOTIFY_OK;
+ /* Ignore event if it was not send by notify_node/notify_device */
+ if (bq->notify_node) {
+ if (!psy->dev.parent ||
+ psy->dev.parent->of_node != bq->notify_node)
+ return NOTIFY_OK;
+ } else if (bq->init_data.notify_device) {
+ if (strcmp(psy->desc->name, bq->init_data.notify_device) != 0)
+ return NOTIFY_OK;
+ }
dev_dbg(bq->dev, "notifier call was called\n");
if (ret != 0)
return NOTIFY_OK;
- mA = prop.intval;
-
- if (mA == 0)
- mode = BQ2415X_MODE_OFF;
- else if (mA < 500)
- mode = BQ2415X_MODE_NONE;
- else if (mA < 1800)
- mode = BQ2415X_MODE_HOST_CHARGER;
- else
- mode = BQ2415X_MODE_DEDICATED_CHARGER;
-
- if (bq->reported_mode == mode)
+ if (!bq2415x_update_reported_mode(bq, prop.intval))
return NOTIFY_OK;
- bq->reported_mode = mode;
-
/* if automode is not enabled do not tell about reported_mode */
if (bq->automode < 1)
return NOTIFY_OK;
struct device_node *np = client->dev.of_node;
struct bq2415x_platform_data *pdata = client->dev.platform_data;
const struct acpi_device_id *acpi_id = NULL;
+ struct power_supply *notify_psy = NULL;
+ union power_supply_propval prop;
if (!np && !pdata && !ACPI_HANDLE(&client->dev)) {
dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n");
goto error_2;
}
- if (np) {
- bq->notify_psy = power_supply_get_by_phandle(np,
- "ti,usb-charger-detection");
-
- if (IS_ERR(bq->notify_psy)) {
- dev_info(&client->dev,
- "no 'ti,usb-charger-detection' property (err=%ld)\n",
- PTR_ERR(bq->notify_psy));
- bq->notify_psy = NULL;
- } else if (!bq->notify_psy) {
- ret = -EPROBE_DEFER;
- goto error_2;
- }
- } else if (pdata && pdata->notify_device) {
- bq->notify_psy = power_supply_get_by_name(pdata->notify_device);
- } else {
- bq->notify_psy = NULL;
- }
-
i2c_set_clientdata(client, bq);
bq->id = num;
"ti,current-limit",
&bq->init_data.current_limit);
if (ret)
- goto error_3;
+ goto error_2;
ret = device_property_read_u32(bq->dev,
"ti,weak-battery-voltage",
&bq->init_data.weak_battery_voltage);
if (ret)
- goto error_3;
+ goto error_2;
ret = device_property_read_u32(bq->dev,
"ti,battery-regulation-voltage",
&bq->init_data.battery_regulation_voltage);
if (ret)
- goto error_3;
+ goto error_2;
ret = device_property_read_u32(bq->dev,
"ti,charge-current",
&bq->init_data.charge_current);
if (ret)
- goto error_3;
+ goto error_2;
ret = device_property_read_u32(bq->dev,
"ti,termination-current",
&bq->init_data.termination_current);
if (ret)
- goto error_3;
+ goto error_2;
ret = device_property_read_u32(bq->dev,
"ti,resistor-sense",
&bq->init_data.resistor_sense);
if (ret)
- goto error_3;
+ goto error_2;
+ if (np)
+ bq->notify_node = of_parse_phandle(np,
+ "ti,usb-charger-detection", 0);
} else {
memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
}
ret = bq2415x_power_supply_init(bq);
if (ret) {
dev_err(bq->dev, "failed to register power supply: %d\n", ret);
- goto error_3;
+ goto error_2;
}
ret = bq2415x_sysfs_init(bq);
if (ret) {
dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
- goto error_4;
+ goto error_3;
}
ret = bq2415x_set_defaults(bq);
if (ret) {
dev_err(bq->dev, "failed to set default values: %d\n", ret);
- goto error_5;
+ goto error_4;
}
- if (bq->notify_psy) {
+ if (bq->notify_node || bq->init_data.notify_device) {
bq->nb.notifier_call = bq2415x_notifier_call;
ret = power_supply_reg_notifier(&bq->nb);
if (ret) {
dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
- goto error_6;
+ goto error_4;
}
- /* Query for initial reported_mode and set it */
- bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED,
- bq->notify_psy);
- bq2415x_set_mode(bq, bq->reported_mode);
-
bq->automode = 1;
- dev_info(bq->dev, "automode enabled\n");
+ dev_info(bq->dev, "automode supported, waiting for events\n");
} else {
bq->automode = -1;
dev_info(bq->dev, "automode not supported\n");
}
+ /* Query for initial reported_mode and set it */
+ if (bq->nb.notifier_call) {
+ if (np) {
+ notify_psy = power_supply_get_by_phandle(np,
+ "ti,usb-charger-detection");
+ if (IS_ERR(notify_psy))
+ notify_psy = NULL;
+ } else if (bq->init_data.notify_device) {
+ notify_psy = power_supply_get_by_name(
+ bq->init_data.notify_device);
+ }
+ }
+ if (notify_psy) {
+ ret = power_supply_get_property(notify_psy,
+ POWER_SUPPLY_PROP_CURRENT_MAX, &prop);
+ power_supply_put(notify_psy);
+
+ if (ret == 0) {
+ bq2415x_update_reported_mode(bq, prop.intval);
+ bq2415x_set_mode(bq, bq->reported_mode);
+ }
+ }
+
INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
bq2415x_set_autotimer(bq, 1);
dev_info(bq->dev, "driver registered\n");
return 0;
-error_6:
-error_5:
- bq2415x_sysfs_exit(bq);
error_4:
- bq2415x_power_supply_exit(bq);
+ bq2415x_sysfs_exit(bq);
error_3:
- if (bq->notify_psy)
- power_supply_put(bq->notify_psy);
+ bq2415x_power_supply_exit(bq);
error_2:
+ if (bq->notify_node)
+ of_node_put(bq->notify_node);
kfree(name);
error_1:
mutex_lock(&bq2415x_id_mutex);
{
struct bq2415x_device *bq = i2c_get_clientdata(client);
- if (bq->notify_psy) {
+ if (bq->nb.notifier_call)
power_supply_unreg_notifier(&bq->nb);
- power_supply_put(bq->notify_psy);
- }
+
+ if (bq->notify_node)
+ of_node_put(bq->notify_node);
bq2415x_sysfs_exit(bq);
bq2415x_power_supply_exit(bq);
}
static enum power_supply_property bq24190_charger_properties[] = {
- POWER_SUPPLY_PROP_TYPE,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
{ "bq24190", BQ24190_REG_VPRS_PN_24190 },
{ },
};
+MODULE_DEVICE_TABLE(i2c, bq24190_i2c_ids);
#ifdef CONFIG_OF
static const struct of_device_id bq24190_of_match[] = {
.id_table = bq24190_i2c_ids,
.driver = {
.name = "bq24190-charger",
- .owner = THIS_MODULE,
.pm = &bq24190_pm_ops,
.of_match_table = of_match_ptr(bq24190_of_match),
},
name = (char *)charger->pdata->name;
if (!name) {
- name = kasprintf(GFP_KERNEL, "bq24735@%s",
- dev_name(&client->dev));
+ name = devm_kasprintf(&client->dev, GFP_KERNEL,
+ "bq24735@%s",
+ dev_name(&client->dev));
if (!name) {
dev_err(&client->dev, "Failed to alloc device name\n");
return -ENOMEM;
if (ret < 0) {
dev_err(&client->dev, "Failed to read manufacturer id : %d\n",
ret);
- goto err_free_name;
+ return ret;
} else if (ret != 0x0040) {
dev_err(&client->dev,
"manufacturer id mismatch. 0x0040 != 0x%04x\n", ret);
- ret = -ENODEV;
- goto err_free_name;
+ return -ENODEV;
}
ret = bq24735_read_word(client, BQ24735_DEVICE_ID);
if (ret < 0) {
dev_err(&client->dev, "Failed to read device id : %d\n", ret);
- goto err_free_name;
+ return ret;
} else if (ret != 0x000B) {
dev_err(&client->dev,
"device id mismatch. 0x000b != 0x%04x\n", ret);
- ret = -ENODEV;
- goto err_free_name;
+ return -ENODEV;
}
if (gpio_is_valid(charger->pdata->status_gpio)) {
ret = bq24735_config_charger(charger);
if (ret < 0) {
dev_err(&client->dev, "failed in configuring charger");
- goto err_free_name;
+ return ret;
}
/* check for AC adapter presence */
ret = bq24735_enable_charging(charger);
if (ret < 0) {
dev_err(&client->dev, "Failed to enable charging\n");
- goto err_free_name;
+ return ret;
}
}
- charger->charger = power_supply_register(&client->dev, supply_desc,
- &psy_cfg);
+ charger->charger = devm_power_supply_register(&client->dev, supply_desc,
+ &psy_cfg);
if (IS_ERR(charger->charger)) {
ret = PTR_ERR(charger->charger);
dev_err(&client->dev, "Failed to register power supply: %d\n",
ret);
- goto err_free_name;
+ return ret;
}
if (client->irq) {
dev_err(&client->dev,
"Unable to register IRQ %d err %d\n",
client->irq, ret);
- goto err_unregister_supply;
+ return ret;
}
}
- return 0;
-err_unregister_supply:
- power_supply_unregister(charger->charger);
-err_free_name:
- if (name != charger->pdata->name)
- kfree(name);
-
- return ret;
-}
-
-static int bq24735_charger_remove(struct i2c_client *client)
-{
- struct bq24735 *charger = i2c_get_clientdata(client);
-
- if (charger->client->irq)
- devm_free_irq(&charger->client->dev, charger->client->irq,
- &charger->charger);
-
- power_supply_unregister(charger->charger);
-
- if (charger->charger_desc.name != charger->pdata->name)
- kfree(charger->charger_desc.name);
-
return 0;
}
static struct i2c_driver bq24735_charger_driver = {
.driver = {
.name = "bq24735-charger",
- .owner = THIS_MODULE,
.of_match_table = bq24735_match_ids,
},
.probe = bq24735_charger_probe,
- .remove = bq24735_charger_remove,
.id_table = bq24735_charger_id,
};
#include <linux/power/bq27x00_battery.h>
-#define DRIVER_VERSION "1.2.0"
-
-#define BQ27x00_REG_TEMP 0x06
-#define BQ27x00_REG_VOLT 0x08
-#define BQ27x00_REG_AI 0x14
-#define BQ27x00_REG_FLAGS 0x0A
-#define BQ27x00_REG_TTE 0x16
-#define BQ27x00_REG_TTF 0x18
-#define BQ27x00_REG_TTECP 0x26
-#define BQ27x00_REG_NAC 0x0C /* Nominal available capacity */
-#define BQ27x00_REG_LMD 0x12 /* Last measured discharge */
-#define BQ27x00_REG_CYCT 0x2A /* Cycle count total */
-#define BQ27x00_REG_AE 0x22 /* Available energy */
-#define BQ27x00_POWER_AVG 0x24
-
-#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */
-#define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */
-#define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */
-#define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */
-#define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */
-#define BQ27000_FLAG_FC BIT(5)
-#define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
-
-#define BQ27500_REG_SOC 0x2C
-#define BQ27500_REG_DCAP 0x3C /* Design capacity */
-#define BQ27500_FLAG_DSC BIT(0)
-#define BQ27500_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */
-#define BQ27500_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */
-#define BQ27500_FLAG_FC BIT(9)
-#define BQ27500_FLAG_OTC BIT(15)
-
-#define BQ27742_POWER_AVG 0x76
-
-#define BQ27510_REG_SOC 0x20
-#define BQ27510_REG_DCAP 0x2E /* Design capacity */
-#define BQ27510_REG_CYCT 0x1E /* Cycle count total */
+#define DRIVER_VERSION "1.2.0"
+
+#define BQ27XXX_MANUFACTURER "Texas Instruments"
+
+#define BQ27x00_REG_TEMP 0x06
+#define BQ27x00_REG_VOLT 0x08
+#define BQ27x00_REG_AI 0x14
+#define BQ27x00_REG_FLAGS 0x0A
+#define BQ27x00_REG_TTE 0x16
+#define BQ27x00_REG_TTF 0x18
+#define BQ27x00_REG_TTECP 0x26
+#define BQ27x00_REG_NAC 0x0C /* Nominal available capacity */
+#define BQ27x00_REG_LMD 0x12 /* Last measured discharge */
+#define BQ27x00_REG_CYCT 0x2A /* Cycle count total */
+#define BQ27x00_REG_AE 0x22 /* Available energy */
+#define BQ27x00_POWER_AVG 0x24
+
+#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */
+#define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */
+#define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */
+#define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */
+#define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */
+#define BQ27000_FLAG_FC BIT(5)
+#define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
+
+#define BQ27500_REG_SOC 0x2C
+#define BQ27500_REG_DCAP 0x3C /* Design capacity */
+#define BQ27500_FLAG_DSC BIT(0)
+#define BQ27500_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */
+#define BQ27500_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */
+#define BQ27500_FLAG_FC BIT(9)
+#define BQ27500_FLAG_OTC BIT(15)
+
+#define BQ27742_POWER_AVG 0x76
+
+#define BQ27510_REG_SOC 0x20
+#define BQ27510_REG_DCAP 0x2E /* Design capacity */
+#define BQ27510_REG_CYCT 0x1E /* Cycle count total */
/* bq27425 register addresses are same as bq27x00 addresses minus 4 */
-#define BQ27425_REG_OFFSET 0x04
+#define BQ27425_REG_OFFSET 0x04
#define BQ27425_REG_SOC (0x1C + BQ27425_REG_OFFSET)
-#define BQ27425_REG_DCAP (0x3C + BQ27425_REG_OFFSET)
+#define BQ27425_REG_DCAP (0x3C + BQ27425_REG_OFFSET)
#define BQ27000_RS 20 /* Resistor sense */
#define BQ27x00_POWER_CONSTANT (256 * 29200 / 1000)
};
struct bq27x00_device_info {
- struct device *dev;
+ struct device *dev;
int id;
enum bq27x00_chip chip;
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27425_battery_props[] = {
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27742_battery_props[] = {
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27510_battery_props[] = {
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_MANUFACTURER,
};
static unsigned int poll_interval = 360;
module_param(poll_interval, uint, 0644);
-MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - " \
- "0 disables polling");
+MODULE_PARM_DESC(poll_interval,
+ "battery poll interval in seconds - 0 disables polling");
/*
* Common code for BQ27x00 devices
*/
static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg,
- bool single)
+ bool single)
{
if (di->chip == BQ27425)
return di->bus.read(di, reg - BQ27425_REG_OFFSET, single);
ilmd = bq27x00_read(di, BQ27510_REG_DCAP, false);
else
ilmd = bq27x00_read(di, BQ27500_REG_DCAP, false);
- } else
+ } else {
ilmd = bq27x00_read(di, BQ27000_REG_ILMD, true);
+ }
if (ilmd < 0) {
dev_dbg(di->dev, "error reading initial last measured discharge\n");
return tval;
}
- if ((di->chip == BQ27500)) {
+ if (di->chip == BQ27500) {
if (tval & BQ27500_FLAG_SOCF)
tval = POWER_SUPPLY_HEALTH_DEAD;
else if (tval & BQ27500_FLAG_OTC)
* Or 0 if something fails.
*/
static int bq27x00_battery_current(struct bq27x00_device_info *di,
- union power_supply_propval *val)
+ union power_supply_propval *val)
{
int curr;
int flags;
}
static int bq27x00_battery_status(struct bq27x00_device_info *di,
- union power_supply_propval *val)
+ union power_supply_propval *val)
{
int status;
}
static int bq27x00_battery_capacity_level(struct bq27x00_device_info *di,
- union power_supply_propval *val)
+ union power_supply_propval *val)
{
int level;
* Or < 0 if something fails.
*/
static int bq27x00_battery_voltage(struct bq27x00_device_info *di,
- union power_supply_propval *val)
+ union power_supply_propval *val)
{
int volt;
}
static int bq27x00_simple_value(int value,
- union power_supply_propval *val)
+ union power_supply_propval *val)
{
if (value < 0)
return value;
case POWER_SUPPLY_PROP_HEALTH:
ret = bq27x00_simple_value(di->cache.health, val);
break;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = BQ27XXX_MANUFACTURER;
+ break;
default:
return -EINVAL;
}
mutex_destroy(&di->lock);
}
-
/* i2c specific code */
#ifdef CONFIG_BATTERY_BQ27X00_I2C
name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name, num);
if (!name) {
- dev_err(&client->dev, "failed to allocate device name\n");
retval = -ENOMEM;
goto batt_failed;
}
di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
if (!di) {
- dev_err(&client->dev, "failed to allocate device info data\n");
retval = -ENOMEM;
goto batt_failed;
}
static inline int bq27x00_battery_i2c_init(void)
{
int ret = i2c_add_driver(&bq27x00_battery_driver);
+
if (ret)
- printk(KERN_ERR "Unable to register BQ27x00 i2c driver\n");
+ pr_err("Unable to register BQ27x00 i2c driver\n");
return ret;
}
#ifdef CONFIG_BATTERY_BQ27X00_PLATFORM
static int bq27000_read_platform(struct bq27x00_device_info *di, u8 reg,
- bool single)
+ bool single)
{
struct device *dev = di->dev;
struct bq27000_platform_data *pdata = dev->platform_data;
}
di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
- if (!di) {
- dev_err(&pdev->dev, "failed to allocate device info data\n");
+ if (!di)
return -ENOMEM;
- }
platform_set_drvdata(pdev, di);
static inline int bq27x00_battery_platform_init(void)
{
int ret = platform_driver_register(&bq27000_battery_driver);
+
if (ret)
- printk(KERN_ERR "Unable to register BQ27000 platform driver\n");
+ pr_err("Unable to register BQ27000 platform driver\n");
return ret;
}
struct power_supply *psy = to_power_supply(dev);
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
- count = min_t(loff_t, count,
- DS2780_EEPROM_BLOCK1_END -
- DS2780_EEPROM_BLOCK1_START + 1 - off);
-
return ds2780_read_block(dev_info, buf,
DS2780_EEPROM_BLOCK1_START + off, count);
}
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
int ret;
- count = min_t(loff_t, count,
- DS2780_EEPROM_BLOCK1_END -
- DS2780_EEPROM_BLOCK1_START + 1 - off);
-
ret = ds2780_write(dev_info, buf,
DS2780_EEPROM_BLOCK1_START + off, count);
if (ret < 0)
.name = "param_eeprom",
.mode = S_IRUGO | S_IWUSR,
},
- .size = DS2780_EEPROM_BLOCK1_END - DS2780_EEPROM_BLOCK1_START + 1,
+ .size = DS2780_PARAM_EEPROM_SIZE,
.read = ds2780_read_param_eeprom_bin,
.write = ds2780_write_param_eeprom_bin,
};
struct power_supply *psy = to_power_supply(dev);
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
- count = min_t(loff_t, count,
- DS2780_EEPROM_BLOCK0_END -
- DS2780_EEPROM_BLOCK0_START + 1 - off);
-
return ds2780_read_block(dev_info, buf,
DS2780_EEPROM_BLOCK0_START + off, count);
}
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
int ret;
- count = min_t(loff_t, count,
- DS2780_EEPROM_BLOCK0_END -
- DS2780_EEPROM_BLOCK0_START + 1 - off);
-
ret = ds2780_write(dev_info, buf,
DS2780_EEPROM_BLOCK0_START + off, count);
if (ret < 0)
.name = "user_eeprom",
.mode = S_IRUGO | S_IWUSR,
},
- .size = DS2780_EEPROM_BLOCK0_END - DS2780_EEPROM_BLOCK0_START + 1,
+ .size = DS2780_USER_EEPROM_SIZE,
.read = ds2780_read_user_eeprom_bin,
.write = ds2780_write_user_eeprom_bin,
};
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
- count = min_t(loff_t, count, DS2781_PARAM_EEPROM_SIZE - off);
-
return ds2781_read_block(dev_info, buf,
DS2781_EEPROM_BLOCK1_START + off, count);
}
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
int ret;
- count = min_t(loff_t, count, DS2781_PARAM_EEPROM_SIZE - off);
-
ret = ds2781_write(dev_info, buf,
DS2781_EEPROM_BLOCK1_START + off, count);
if (ret < 0)
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
- count = min_t(loff_t, count, DS2781_USER_EEPROM_SIZE - off);
-
return ds2781_read_block(dev_info, buf,
DS2781_EEPROM_BLOCK0_START + off, count);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
int ret;
- count = min_t(loff_t, count, DS2781_USER_EEPROM_SIZE - off);
-
ret = ds2781_write(dev_info, buf,
DS2781_EEPROM_BLOCK0_START + off, count);
if (ret < 0)
#include <linux/swab.h>
#include <linux/i2c.h>
#include <linux/delay.h>
-#include <linux/idr.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
struct power_supply_desc supply_desc; /* Supply description */
struct delayed_work work; /* Work scheduler */
int num_regs; /* Number of registers (chip type) */
- int id; /* Identifier of ltc294x chip */
int charge; /* Last charge register content */
int r_sense; /* mOhm */
int Qlsb; /* nAh */
};
-static DEFINE_IDR(ltc294x_id);
-static DEFINE_MUTEX(ltc294x_lock);
-
static inline int convert_bin_to_uAh(
const struct ltc294x_info *info, int Q)
{
cancel_delayed_work(&info->work);
power_supply_unregister(info->supply);
- kfree(info->supply_desc.name);
- mutex_lock(<c294x_lock);
- idr_remove(<c294x_id, info->id);
- mutex_unlock(<c294x_lock);
return 0;
}
struct power_supply_config psy_cfg = {};
struct ltc294x_info *info;
int ret;
- int num;
u32 prescaler_exp;
s32 r_sense;
struct device_node *np;
- mutex_lock(<c294x_lock);
- ret = idr_alloc(<c294x_id, client, 0, 0, GFP_KERNEL);
- mutex_unlock(<c294x_lock);
- if (ret < 0)
- goto fail_id;
-
- num = ret;
-
info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
- if (info == NULL) {
- ret = -ENOMEM;
- goto fail_info;
- }
+ if (info == NULL)
+ return -ENOMEM;
i2c_set_clientdata(client, info);
- info->num_regs = id->driver_data;
- info->supply_desc.name = kasprintf(GFP_KERNEL, "%s-%d", client->name,
- num);
- if (!info->supply_desc.name) {
- ret = -ENOMEM;
- goto fail_name;
- }
-
np = of_node_get(client->dev.of_node);
+ info->num_regs = id->driver_data;
+ info->supply_desc.name = np->name;
+
/* r_sense can be negative, when sense+ is connected to the battery
* instead of the sense-. This results in reversed measurements. */
ret = of_property_read_u32(np, "lltc,resistor-sense", &r_sense);
if (ret < 0) {
dev_err(&client->dev,
"Could not find lltc,resistor-sense in devicetree\n");
- goto fail_name;
+ return ret;
}
info->r_sense = r_sense;
}
info->client = client;
- info->id = num;
info->supply_desc.type = POWER_SUPPLY_TYPE_BATTERY;
info->supply_desc.properties = ltc294x_properties;
if (info->num_regs >= LTC294X_REG_TEMPERATURE_LSB)
ret = ltc294x_reset(info, prescaler_exp);
if (ret < 0) {
dev_err(&client->dev, "Communication with chip failed\n");
- goto fail_comm;
+ return ret;
}
info->supply = power_supply_register(&client->dev, &info->supply_desc,
&psy_cfg);
if (IS_ERR(info->supply)) {
dev_err(&client->dev, "failed to register ltc2941\n");
- ret = PTR_ERR(info->supply);
- goto fail_register;
+ return PTR_ERR(info->supply);
} else {
schedule_delayed_work(&info->work, LTC294X_WORK_DELAY * HZ);
}
return 0;
-
-fail_register:
- kfree(info->supply_desc.name);
-fail_comm:
-fail_name:
-fail_info:
- mutex_lock(<c294x_lock);
- idr_remove(<c294x_id, num);
- mutex_unlock(<c294x_lock);
-fail_id:
- return ret;
}
#ifdef CONFIG_PM_SLEEP
int ret;
int i;
- if (off >= EEPROM_SIZE)
- return 0;
- if (off + count > EEPROM_SIZE)
- count = EEPROM_SIZE - off;
-
for (i = 0; i < count; i++) {
ec_byte = EEPROM_START + off + i;
ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &buf[i], 1);
.name = "eeprom",
.mode = S_IRUGO,
},
- .size = 0,
+ .size = EEPROM_SIZE,
.read = olpc_bat_eeprom_read,
};
.remove = pm2xxx_wall_charger_remove,
.driver = {
.name = "pm2xxx-wall_charger",
- .owner = THIS_MODULE,
.pm = PM2XXX_PM_OPS,
},
.id_table = pm2xxx_id,
help
Reboot support for Renesas R-Mobile and SH-Mobile SoCs.
+config POWER_RESET_ZX
+ tristate "ZTE SoCs reset driver"
+ depends on ARCH_ZX || COMPILE_TEST
+ depends on HAS_IOMEM
+ help
+ Reboot support for ZTE SoCs.
+
endif
obj-$(CONFIG_POWER_RESET_SYSCON) += syscon-reboot.o
obj-$(CONFIG_POWER_RESET_SYSCON_POWEROFF) += syscon-poweroff.o
obj-$(CONFIG_POWER_RESET_RMOBILE) += rmobile-reset.o
+obj-$(CONFIG_POWER_RESET_ZX) += zx-reboot.o
return NOTIFY_DONE;
}
+static int sama5d3_restart(struct notifier_block *this, unsigned long mode,
+ void *cmd)
+{
+ writel(cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST),
+ at91_rstc_base);
+
+ return NOTIFY_DONE;
+}
+
static void __init at91_reset_status(struct platform_device *pdev)
{
u32 reg = readl(at91_rstc_base + AT91_RSTC_SR);
static const struct of_device_id at91_ramc_of_match[] = {
{ .compatible = "atmel,at91sam9260-sdramc", },
{ .compatible = "atmel,at91sam9g45-ddramc", },
- { .compatible = "atmel,sama5d3-ddramc", },
{ /* sentinel */ }
};
static const struct of_device_id at91_reset_of_match[] = {
{ .compatible = "atmel,at91sam9260-rstc", .data = at91sam9260_restart },
{ .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
+ { .compatible = "atmel,sama5d3-rstc", .data = sama5d3_restart },
{ /* sentinel */ }
};
return -ENODEV;
}
- for_each_matching_node(np, at91_ramc_of_match) {
- at91_ramc_base[idx] = of_iomap(np, 0);
- if (!at91_ramc_base[idx]) {
- dev_err(&pdev->dev, "Could not map ram controller address\n");
- return -ENODEV;
+ if (!of_device_is_compatible(pdev->dev.of_node, "atmel,sama5d3-rstc")) {
+ /* we need to shutdown the ddr controller, so get ramc base */
+ for_each_matching_node(np, at91_ramc_of_match) {
+ at91_ramc_base[idx] = of_iomap(np, 0);
+ if (!at91_ramc_base[idx]) {
+ dev_err(&pdev->dev, "Could not map ram controller address\n");
+ return -ENODEV;
+ }
+ idx++;
}
- idx++;
}
match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
--- /dev/null
+/*
+ * ZTE zx296702 SoC reset code
+ *
+ * Copyright (c) 2015 Linaro Ltd.
+ *
+ * Author: Jun Nie <jun.nie@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+
+static void __iomem *base;
+static void __iomem *pcu_base;
+
+static int zx_restart_handler(struct notifier_block *this,
+ unsigned long mode, void *cmd)
+{
+ writel_relaxed(1, base + 0xb0);
+ writel_relaxed(1, pcu_base + 0x34);
+
+ mdelay(50);
+ pr_emerg("Unable to restart system\n");
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block zx_restart_nb = {
+ .notifier_call = zx_restart_handler,
+ .priority = 128,
+};
+
+static int zx_reboot_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int err;
+
+ base = of_iomap(np, 0);
+ if (!base) {
+ WARN(1, "failed to map base address");
+ return -ENODEV;
+ }
+
+ np = of_find_compatible_node(NULL, NULL, "zte,zx296702-pcu");
+ pcu_base = of_iomap(np, 0);
+ if (!pcu_base) {
+ iounmap(base);
+ WARN(1, "failed to map pcu_base address");
+ return -ENODEV;
+ }
+
+ err = register_restart_handler(&zx_restart_nb);
+ if (err)
+ dev_err(&pdev->dev, "Register restart handler failed(err=%d)\n",
+ err);
+
+ return err;
+}
+
+static const struct of_device_id zx_reboot_of_match[] = {
+ { .compatible = "zte,sysctrl" },
+ {}
+};
+
+static struct platform_driver zx_reboot_driver = {
+ .probe = zx_reboot_probe,
+ .driver = {
+ .name = "zx-reboot",
+ .of_match_table = zx_reboot_of_match,
+ },
+};
+module_platform_driver(zx_reboot_driver);
{ "rt5033-battery", },
{ }
};
-MODULE_DEVICE_TABLE(platform, rt5033_battery_id);
+MODULE_DEVICE_TABLE(i2c, rt5033_battery_id);
static struct i2c_driver rt5033_battery_driver = {
.driver = {
if (irq2 & GET_MASK(F_CHRVPI)) {
dev_dbg(dev, "Charger fault occurred\n");
- alert_userspace = true;
/*
* CHRVPI bit is set in 2 cases:
* 1. when the power source is connected to the charger.
* To identify the case, PWR_RDY bit is checked. Because
* PWR_RDY bit is set / cleared after CHRVPI interrupt is
* triggered, it is used delayed_work to later read PWR_RDY bit.
+ * Also, do not set to true alert_userspace, because there is no
+ * need to notify userspace when CHRVPI interrupt has occurred.
+ * Userspace will be notified after PWR_RDY bit is read.
*/
queue_delayed_work(system_power_efficient_wq,
&info->pwr_rdy_work,
/*
* Sometimes, an interrupt occurs while rt9455_probe() function
* is executing and power_supply_register() is not yet called.
- * Do not call power_supply_charged() in this case.
+ * Do not call power_supply_changed() in this case.
*/
if (info->charger)
power_supply_changed(info->charger);
RT9455_MAX_CHARGING_TIME * HZ);
break;
}
+ /*
+ * Notify userspace that the charger has been either connected to or
+ * disconnected from the power source.
+ */
+ power_supply_changed(info->charger);
}
static void rt9455_max_charging_time_work_callback(struct work_struct *work)
if (ret)
dev_err(dev, "Failed to unmask BATAB interrupt\n");
}
+ /*
+ * Notify userspace that the battery is now connected to the
+ * charger.
+ */
+ power_supply_changed(info->charger);
}
}
platform_set_drvdata(pdev, di);
di->dev = &pdev->dev;
- di->bat_desc.name = dev_name(&pdev->dev);
+ di->bat_desc.name = "rx51-battery";
di->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
di->bat_desc.properties = rx51_battery_props;
di->bat_desc.num_properties = ARRAY_SIZE(rx51_battery_props);
#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/otg.h>
-#include <linux/regulator/machine.h>
+#include <linux/i2c/twl4030-madc.h>
+#define TWL4030_BCIMDEN 0x00
+#define TWL4030_BCIMDKEY 0x01
#define TWL4030_BCIMSTATEC 0x02
#define TWL4030_BCIICHG 0x08
#define TWL4030_BCIVAC 0x0a
#define TWL4030_BCIMFSTS4 0x10
#define TWL4030_BCICTL1 0x23
#define TWL4030_BB_CFG 0x12
+#define TWL4030_BCIIREF1 0x27
+#define TWL4030_BCIIREF2 0x28
+#define TWL4030_BCIMFKEY 0x11
+#define TWL4030_BCIMFEN3 0x14
+#define TWL4030_BCIMFTH8 0x1d
+#define TWL4030_BCIMFTH9 0x1e
+#define TWL4030_BCIWDKEY 0x21
#define TWL4030_BCIMFSTS1 0x01
#define TWL4030_BCIAUTOWEN BIT(5)
#define TWL4030_CONFIG_DONE BIT(4)
+#define TWL4030_CVENAC BIT(2)
#define TWL4030_BCIAUTOUSB BIT(1)
#define TWL4030_BCIAUTOAC BIT(0)
#define TWL4030_CGAIN BIT(5)
#define TWL4030_MSTATEC_COMPLETE1 0x0b
#define TWL4030_MSTATEC_COMPLETE4 0x0e
+#if IS_ENABLED(CONFIG_TWL4030_MADC)
+/*
+ * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11)
+ * then AC is available.
+ */
+static inline int ac_available(void)
+{
+ return twl4030_get_madc_conversion(11) > 4500;
+}
+#else
+static inline int ac_available(void)
+{
+ return 0;
+}
+#endif
static bool allow_usb;
module_param(allow_usb, bool, 0644);
MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
struct work_struct work;
int irq_chg;
int irq_bci;
- struct regulator *usb_reg;
int usb_enabled;
+ /*
+ * ichg_* and *_cur values in uA. If any are 'large', we set
+ * CGAIN to '1' which doubles the range for half the
+ * precision.
+ */
+ unsigned int ichg_eoc, ichg_lo, ichg_hi;
+ unsigned int usb_cur, ac_cur;
+ bool ac_is_active;
+ int usb_mode, ac_mode; /* charging mode requested */
+#define CHARGE_OFF 0
+#define CHARGE_AUTO 1
+#define CHARGE_LINEAR 2
+
+ /* When setting the USB current we slowly increase the
+ * requested current until target is reached or the voltage
+ * drops below 4.75V. In the latter case we step back one
+ * step.
+ */
+ unsigned int usb_cur_target;
+ struct delayed_work current_worker;
+#define USB_CUR_STEP 20000 /* 20mA at a time */
+#define USB_MIN_VOLT 4750000 /* 4.75V */
+#define USB_CUR_DELAY msecs_to_jiffies(100)
+#define USB_MAX_CURRENT 1700000 /* TWL4030 caps at 1.7A */
+
unsigned long event;
};
+/* strings for 'usb_mode' values */
+static char *modes[] = { "off", "auto", "continuous" };
+
/*
* clear and set bits on an given register on a given module
*/
}
/*
- * Check if VBUS power is present
+ * TI provided formulas:
+ * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85
+ * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7
+ * Here we use integer approximation of:
+ * CGAIN == 0: val * 1.6618 - 0.85 * 1000
+ * CGAIN == 1: (val * 1.6618 - 0.85 * 1000) * 2
+ */
+/*
+ * convert twl register value for currents into uA
+ */
+static int regval2ua(int regval, bool cgain)
+{
+ if (cgain)
+ return (regval * 16618 - 8500 * 1000) / 5;
+ else
+ return (regval * 16618 - 8500 * 1000) / 10;
+}
+
+/*
+ * convert uA currents into twl register value
*/
-static int twl4030_bci_have_vbus(struct twl4030_bci *bci)
+static int ua2regval(int ua, bool cgain)
{
int ret;
- u8 hwsts;
+ if (cgain)
+ ua /= 2;
+ ret = (ua * 10 + 8500 * 1000) / 16618;
+ /* rounding problems */
+ if (ret < 512)
+ ret = 512;
+ return ret;
+}
- ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &hwsts,
- TWL4030_PM_MASTER_STS_HW_CONDITIONS);
- if (ret < 0)
- return 0;
+static int twl4030_charger_update_current(struct twl4030_bci *bci)
+{
+ int status;
+ int cur;
+ unsigned reg, cur_reg;
+ u8 bcictl1, oldreg, fullreg;
+ bool cgain = false;
+ u8 boot_bci;
- dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts);
+ /*
+ * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11)
+ * and AC is enabled, set current for 'ac'
+ */
+ if (ac_available()) {
+ cur = bci->ac_cur;
+ bci->ac_is_active = true;
+ } else {
+ cur = bci->usb_cur;
+ bci->ac_is_active = false;
+ if (cur > bci->usb_cur_target) {
+ cur = bci->usb_cur_target;
+ bci->usb_cur = cur;
+ }
+ if (cur < bci->usb_cur_target)
+ schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY);
+ }
+
+ /* First, check thresholds and see if cgain is needed */
+ if (bci->ichg_eoc >= 200000)
+ cgain = true;
+ if (bci->ichg_lo >= 400000)
+ cgain = true;
+ if (bci->ichg_hi >= 820000)
+ cgain = true;
+ if (cur > 852000)
+ cgain = true;
+
+ status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
+ if (status < 0)
+ return status;
+ if (twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &boot_bci,
+ TWL4030_PM_MASTER_BOOT_BCI) < 0)
+ boot_bci = 0;
+ boot_bci &= 7;
+
+ if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN))
+ /* Need to turn for charging while we change the
+ * CGAIN bit. Leave it off while everything is
+ * updated.
+ */
+ twl4030_clear_set_boot_bci(boot_bci, 0);
+
+ /*
+ * For ichg_eoc, the hardware only supports reg values matching
+ * 100XXXX000, and requires the XXXX be stored in the high nibble
+ * of TWL4030_BCIMFTH8.
+ */
+ reg = ua2regval(bci->ichg_eoc, cgain);
+ if (reg > 0x278)
+ reg = 0x278;
+ if (reg < 0x200)
+ reg = 0x200;
+ reg = (reg >> 3) & 0xf;
+ fullreg = reg << 4;
+
+ /*
+ * For ichg_lo, reg value must match 10XXXX0000.
+ * XXXX is stored in low nibble of TWL4030_BCIMFTH8.
+ */
+ reg = ua2regval(bci->ichg_lo, cgain);
+ if (reg > 0x2F0)
+ reg = 0x2F0;
+ if (reg < 0x200)
+ reg = 0x200;
+ reg = (reg >> 4) & 0xf;
+ fullreg |= reg;
+
+ /* ichg_eoc and ichg_lo live in same register */
+ status = twl4030_bci_read(TWL4030_BCIMFTH8, &oldreg);
+ if (status < 0)
+ return status;
+ if (oldreg != fullreg) {
+ status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xF4,
+ TWL4030_BCIMFKEY);
+ if (status < 0)
+ return status;
+ twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
+ fullreg, TWL4030_BCIMFTH8);
+ }
- /* in case we also have STS_USB_ID, VBUS is driven by TWL itself */
- if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID))
- return 1;
+ /* ichg_hi threshold must be 1XXXX01100 (I think) */
+ reg = ua2regval(bci->ichg_hi, cgain);
+ if (reg > 0x3E0)
+ reg = 0x3E0;
+ if (reg < 0x200)
+ reg = 0x200;
+ fullreg = (reg >> 5) & 0xF;
+ fullreg <<= 4;
+ status = twl4030_bci_read(TWL4030_BCIMFTH9, &oldreg);
+ if (status < 0)
+ return status;
+ if ((oldreg & 0xF0) != fullreg) {
+ fullreg |= (oldreg & 0x0F);
+ status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7,
+ TWL4030_BCIMFKEY);
+ if (status < 0)
+ return status;
+ twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
+ fullreg, TWL4030_BCIMFTH9);
+ }
+ /*
+ * And finally, set the current. This is stored in
+ * two registers.
+ */
+ reg = ua2regval(cur, cgain);
+ /* we have only 10 bits */
+ if (reg > 0x3ff)
+ reg = 0x3ff;
+ status = twl4030_bci_read(TWL4030_BCIIREF1, &oldreg);
+ if (status < 0)
+ return status;
+ cur_reg = oldreg;
+ status = twl4030_bci_read(TWL4030_BCIIREF2, &oldreg);
+ if (status < 0)
+ return status;
+ cur_reg |= oldreg << 8;
+ if (reg != oldreg) {
+ /* disable write protection for one write access for
+ * BCIIREF */
+ status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7,
+ TWL4030_BCIMFKEY);
+ if (status < 0)
+ return status;
+ status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
+ (reg & 0x100) ? 3 : 2,
+ TWL4030_BCIIREF2);
+ if (status < 0)
+ return status;
+ /* disable write protection for one write access for
+ * BCIIREF */
+ status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7,
+ TWL4030_BCIMFKEY);
+ if (status < 0)
+ return status;
+ status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
+ reg & 0xff,
+ TWL4030_BCIIREF1);
+ }
+ if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) {
+ /* Flip CGAIN and re-enable charging */
+ bcictl1 ^= TWL4030_CGAIN;
+ twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
+ bcictl1, TWL4030_BCICTL1);
+ twl4030_clear_set_boot_bci(0, boot_bci);
+ }
return 0;
}
+static int twl4030_charger_get_current(void);
+
+static void twl4030_current_worker(struct work_struct *data)
+{
+ int v, curr;
+ int res;
+ struct twl4030_bci *bci = container_of(data, struct twl4030_bci,
+ current_worker.work);
+
+ res = twl4030bci_read_adc_val(TWL4030_BCIVBUS);
+ if (res < 0)
+ v = 0;
+ else
+ /* BCIVBUS uses ADCIN8, 7/1023 V/step */
+ v = res * 6843;
+ curr = twl4030_charger_get_current();
+
+ dev_dbg(bci->dev, "v=%d cur=%d limit=%d target=%d\n", v, curr,
+ bci->usb_cur, bci->usb_cur_target);
+
+ if (v < USB_MIN_VOLT) {
+ /* Back up and stop adjusting. */
+ bci->usb_cur -= USB_CUR_STEP;
+ bci->usb_cur_target = bci->usb_cur;
+ } else if (bci->usb_cur >= bci->usb_cur_target ||
+ bci->usb_cur + USB_CUR_STEP > USB_MAX_CURRENT) {
+ /* Reached target and voltage is OK - stop */
+ return;
+ } else {
+ bci->usb_cur += USB_CUR_STEP;
+ schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY);
+ }
+ twl4030_charger_update_current(bci);
+}
+
/*
* Enable/Disable USB Charge functionality.
*/
{
int ret;
- if (enable) {
- /* Check for USB charger connected */
- if (!twl4030_bci_have_vbus(bci))
- return -ENODEV;
+ if (bci->usb_mode == CHARGE_OFF)
+ enable = false;
+ if (enable && !IS_ERR_OR_NULL(bci->transceiver)) {
- /*
- * Until we can find out what current the device can provide,
- * require a module param to enable USB charging.
- */
- if (!allow_usb) {
- dev_warn(bci->dev, "USB charging is disabled.\n");
- return -EACCES;
- }
+ twl4030_charger_update_current(bci);
- /* Need to keep regulator on */
+ /* Need to keep phy powered */
if (!bci->usb_enabled) {
- ret = regulator_enable(bci->usb_reg);
- if (ret) {
- dev_err(bci->dev,
- "Failed to enable regulator\n");
- return ret;
- }
+ pm_runtime_get_sync(bci->transceiver->dev);
bci->usb_enabled = 1;
}
- /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
- ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
- if (ret < 0)
- return ret;
+ if (bci->usb_mode == CHARGE_AUTO)
+ /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
+ ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
/* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */
ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0,
TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
+ if (bci->usb_mode == CHARGE_LINEAR) {
+ twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC|TWL4030_CVENAC, 0);
+ /* Watch dog key: WOVF acknowledge */
+ ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x33,
+ TWL4030_BCIWDKEY);
+ /* 0x24 + EKEY6: off mode */
+ ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a,
+ TWL4030_BCIMDKEY);
+ /* EKEY2: Linear charge: USB path */
+ ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x26,
+ TWL4030_BCIMDKEY);
+ /* WDKEY5: stop watchdog count */
+ ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf3,
+ TWL4030_BCIWDKEY);
+ /* enable MFEN3 access */
+ ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x9c,
+ TWL4030_BCIMFKEY);
+ /* ICHGEOCEN - end-of-charge monitor (current < 80mA)
+ * (charging continues)
+ * ICHGLOWEN - current level monitor (charge continues)
+ * don't monitor over-current or heat save
+ */
+ ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf0,
+ TWL4030_BCIMFEN3);
+ }
} else {
ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
+ ret |= twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a,
+ TWL4030_BCIMDKEY);
if (bci->usb_enabled) {
- regulator_disable(bci->usb_reg);
+ pm_runtime_mark_last_busy(bci->transceiver->dev);
+ pm_runtime_put_autosuspend(bci->transceiver->dev);
bci->usb_enabled = 0;
}
+ bci->usb_cur = 0;
}
return ret;
/*
* Enable/Disable AC Charge funtionality.
*/
-static int twl4030_charger_enable_ac(bool enable)
+static int twl4030_charger_enable_ac(struct twl4030_bci *bci, bool enable)
{
int ret;
+ if (bci->ac_mode == CHARGE_OFF)
+ enable = false;
+
if (enable)
ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC);
else
struct twl4030_bci *bci = arg;
dev_dbg(bci->dev, "CHG_PRES irq\n");
+ /* reset current on each 'plug' event */
+ bci->ac_cur = 500000;
+ twl4030_charger_update_current(bci);
power_supply_changed(bci->ac);
power_supply_changed(bci->usb);
power_supply_changed(bci->ac);
power_supply_changed(bci->usb);
}
+ twl4030_charger_update_current(bci);
/* various monitoring events, for now we just log them here */
if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1))
return IRQ_HANDLED;
}
+/*
+ * Provide "max_current" attribute in sysfs.
+ */
+static ssize_t
+twl4030_bci_max_current_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t n)
+{
+ struct twl4030_bci *bci = dev_get_drvdata(dev->parent);
+ int cur = 0;
+ int status = 0;
+ status = kstrtoint(buf, 10, &cur);
+ if (status)
+ return status;
+ if (cur < 0)
+ return -EINVAL;
+ if (dev == &bci->ac->dev)
+ bci->ac_cur = cur;
+ else
+ bci->usb_cur_target = cur;
+
+ twl4030_charger_update_current(bci);
+ return n;
+}
+
+/*
+ * sysfs max_current show
+ */
+static ssize_t twl4030_bci_max_current_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int status = 0;
+ int cur = -1;
+ u8 bcictl1;
+ struct twl4030_bci *bci = dev_get_drvdata(dev->parent);
+
+ if (dev == &bci->ac->dev) {
+ if (!bci->ac_is_active)
+ cur = bci->ac_cur;
+ } else {
+ if (bci->ac_is_active)
+ cur = bci->usb_cur_target;
+ }
+ if (cur < 0) {
+ cur = twl4030bci_read_adc_val(TWL4030_BCIIREF1);
+ if (cur < 0)
+ return cur;
+ status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
+ if (status < 0)
+ return status;
+ cur = regval2ua(cur, bcictl1 & TWL4030_CGAIN);
+ }
+ return scnprintf(buf, PAGE_SIZE, "%u\n", cur);
+}
+
+static DEVICE_ATTR(max_current, 0644, twl4030_bci_max_current_show,
+ twl4030_bci_max_current_store);
+
static void twl4030_bci_usb_work(struct work_struct *data)
{
struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work);
dev_dbg(bci->dev, "OTG notify %lu\n", val);
+ /* reset current on each 'plug' event */
+ if (allow_usb)
+ bci->usb_cur_target = 500000;
+ else
+ bci->usb_cur_target = 100000;
+
bci->event = val;
schedule_work(&bci->work);
}
/*
- * TI provided formulas:
- * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85
- * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7
- * Here we use integer approximation of:
- * CGAIN == 0: val * 1.6618 - 0.85
- * CGAIN == 1: (val * 1.6618 - 0.85) * 2
+ * sysfs charger enabled store
+ */
+static ssize_t
+twl4030_bci_mode_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t n)
+{
+ struct twl4030_bci *bci = dev_get_drvdata(dev->parent);
+ int mode;
+ int status;
+
+ if (sysfs_streq(buf, modes[0]))
+ mode = 0;
+ else if (sysfs_streq(buf, modes[1]))
+ mode = 1;
+ else if (sysfs_streq(buf, modes[2]))
+ mode = 2;
+ else
+ return -EINVAL;
+ if (dev == &bci->ac->dev) {
+ if (mode == 2)
+ return -EINVAL;
+ twl4030_charger_enable_ac(bci, false);
+ bci->ac_mode = mode;
+ status = twl4030_charger_enable_ac(bci, true);
+ } else {
+ twl4030_charger_enable_usb(bci, false);
+ bci->usb_mode = mode;
+ status = twl4030_charger_enable_usb(bci, true);
+ }
+ return (status == 0) ? n : status;
+}
+
+/*
+ * sysfs charger enabled show
*/
+static ssize_t
+twl4030_bci_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct twl4030_bci *bci = dev_get_drvdata(dev->parent);
+ int len = 0;
+ int i;
+ int mode = bci->usb_mode;
+
+ if (dev == &bci->ac->dev)
+ mode = bci->ac_mode;
+
+ for (i = 0; i < ARRAY_SIZE(modes); i++)
+ if (mode == i)
+ len += snprintf(buf+len, PAGE_SIZE-len,
+ "[%s] ", modes[i]);
+ else
+ len += snprintf(buf+len, PAGE_SIZE-len,
+ "%s ", modes[i]);
+ buf[len-1] = '\n';
+ return len;
+}
+static DEVICE_ATTR(mode, 0644, twl4030_bci_mode_show,
+ twl4030_bci_mode_store);
+
static int twl4030_charger_get_current(void)
{
int curr;
if (ret)
return ret;
- ret = (curr * 16618 - 850 * 10000) / 10;
- if (bcictl1 & TWL4030_CGAIN)
- ret *= 2;
-
- return ret;
+ return regval2ua(curr, bcictl1 & TWL4030_CGAIN);
}
/*
is_charging = state & TWL4030_MSTATEC_USB;
else
is_charging = state & TWL4030_MSTATEC_AC;
+ if (!is_charging) {
+ u8 s;
+ twl4030_bci_read(TWL4030_BCIMDEN, &s);
+ if (psy->desc->type == POWER_SUPPLY_TYPE_USB)
+ is_charging = s & 1;
+ else
+ is_charging = s & 2;
+ if (is_charging)
+ /* A little white lie */
+ state = TWL4030_MSTATEC_QUICK1;
+ }
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
.get_property = twl4030_bci_get_property,
};
-static int __init twl4030_bci_probe(struct platform_device *pdev)
+static int twl4030_bci_probe(struct platform_device *pdev)
{
struct twl4030_bci *bci;
const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
int ret;
u32 reg;
- bci = kzalloc(sizeof(*bci), GFP_KERNEL);
+ bci = devm_kzalloc(&pdev->dev, sizeof(*bci), GFP_KERNEL);
if (bci == NULL)
return -ENOMEM;
if (!pdata)
pdata = twl4030_bci_parse_dt(&pdev->dev);
+ bci->ichg_eoc = 80100; /* Stop charging when current drops to here */
+ bci->ichg_lo = 241000; /* Low threshold */
+ bci->ichg_hi = 500000; /* High threshold */
+ bci->ac_cur = 500000; /* 500mA */
+ if (allow_usb)
+ bci->usb_cur_target = 500000; /* 500mA */
+ else
+ bci->usb_cur_target = 100000; /* 100mA */
+ bci->usb_mode = CHARGE_AUTO;
+ bci->ac_mode = CHARGE_AUTO;
+
bci->dev = &pdev->dev;
bci->irq_chg = platform_get_irq(pdev, 0);
bci->irq_bci = platform_get_irq(pdev, 1);
ret = twl4030_is_battery_present(bci);
if (ret) {
dev_crit(&pdev->dev, "Battery was not detected:%d\n", ret);
- goto fail_no_battery;
+ return ret;
}
platform_set_drvdata(pdev, bci);
- bci->ac = power_supply_register(&pdev->dev, &twl4030_bci_ac_desc,
- NULL);
+ bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc,
+ NULL);
if (IS_ERR(bci->ac)) {
ret = PTR_ERR(bci->ac);
dev_err(&pdev->dev, "failed to register ac: %d\n", ret);
- goto fail_register_ac;
+ return ret;
}
- bci->usb_reg = regulator_get(bci->dev, "bci3v1");
-
- bci->usb = power_supply_register(&pdev->dev, &twl4030_bci_usb_desc,
- NULL);
+ bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc,
+ NULL);
if (IS_ERR(bci->usb)) {
ret = PTR_ERR(bci->usb);
dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
- goto fail_register_usb;
+ return ret;
}
- ret = request_threaded_irq(bci->irq_chg, NULL,
+ ret = devm_request_threaded_irq(&pdev->dev, bci->irq_chg, NULL,
twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name,
bci);
if (ret < 0) {
dev_err(&pdev->dev, "could not request irq %d, status %d\n",
bci->irq_chg, ret);
- goto fail_chg_irq;
+ return ret;
}
- ret = request_threaded_irq(bci->irq_bci, NULL,
+ ret = devm_request_threaded_irq(&pdev->dev, bci->irq_bci, NULL,
twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci);
if (ret < 0) {
dev_err(&pdev->dev, "could not request irq %d, status %d\n",
bci->irq_bci, ret);
- goto fail_bci_irq;
+ return ret;
}
INIT_WORK(&bci->work, twl4030_bci_usb_work);
+ INIT_DELAYED_WORK(&bci->current_worker, twl4030_current_worker);
bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
if (bci->dev->of_node) {
phynode = of_find_compatible_node(bci->dev->of_node->parent,
NULL, "ti,twl4030-usb");
- if (phynode)
+ if (phynode) {
bci->transceiver = devm_usb_get_phy_by_node(
bci->dev, phynode, &bci->usb_nb);
+ if (IS_ERR(bci->transceiver) &&
+ PTR_ERR(bci->transceiver) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ }
}
/* Enable interrupts now. */
TWL4030_INTERRUPTS_BCIIMR1A);
if (ret < 0) {
dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
- goto fail_unmask_interrupts;
+ return ret;
}
reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
if (ret < 0)
dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
- twl4030_charger_enable_ac(true);
- twl4030_charger_enable_usb(bci, true);
+ twl4030_charger_update_current(bci);
+ if (device_create_file(&bci->usb->dev, &dev_attr_max_current))
+ dev_warn(&pdev->dev, "could not create sysfs file\n");
+ if (device_create_file(&bci->usb->dev, &dev_attr_mode))
+ dev_warn(&pdev->dev, "could not create sysfs file\n");
+ if (device_create_file(&bci->ac->dev, &dev_attr_mode))
+ dev_warn(&pdev->dev, "could not create sysfs file\n");
+ if (device_create_file(&bci->ac->dev, &dev_attr_max_current))
+ dev_warn(&pdev->dev, "could not create sysfs file\n");
+
+ twl4030_charger_enable_ac(bci, true);
+ if (!IS_ERR_OR_NULL(bci->transceiver))
+ twl4030_bci_usb_ncb(&bci->usb_nb,
+ bci->transceiver->last_event,
+ NULL);
+ else
+ twl4030_charger_enable_usb(bci, false);
if (pdata)
twl4030_charger_enable_backup(pdata->bb_uvolt,
pdata->bb_uamp);
twl4030_charger_enable_backup(0, 0);
return 0;
-
-fail_unmask_interrupts:
- free_irq(bci->irq_bci, bci);
-fail_bci_irq:
- free_irq(bci->irq_chg, bci);
-fail_chg_irq:
- power_supply_unregister(bci->usb);
-fail_register_usb:
- power_supply_unregister(bci->ac);
-fail_register_ac:
-fail_no_battery:
- kfree(bci);
-
- return ret;
}
static int __exit twl4030_bci_remove(struct platform_device *pdev)
{
struct twl4030_bci *bci = platform_get_drvdata(pdev);
- twl4030_charger_enable_ac(false);
+ twl4030_charger_enable_ac(bci, false);
twl4030_charger_enable_usb(bci, false);
twl4030_charger_enable_backup(0, 0);
+ device_remove_file(&bci->usb->dev, &dev_attr_max_current);
+ device_remove_file(&bci->usb->dev, &dev_attr_mode);
+ device_remove_file(&bci->ac->dev, &dev_attr_max_current);
+ device_remove_file(&bci->ac->dev, &dev_attr_mode);
/* mask interrupts */
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
TWL4030_INTERRUPTS_BCIIMR1A);
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
TWL4030_INTERRUPTS_BCIIMR2A);
- free_irq(bci->irq_bci, bci);
- free_irq(bci->irq_chg, bci);
- power_supply_unregister(bci->usb);
- power_supply_unregister(bci->ac);
- kfree(bci);
-
return 0;
}
MODULE_DEVICE_TABLE(of, twl_bci_of_match);
static struct platform_driver twl4030_bci_driver = {
+ .probe = twl4030_bci_probe,
.driver = {
.name = "twl4030_bci",
.of_match_table = of_match_ptr(twl_bci_of_match),
},
.remove = __exit_p(twl4030_bci_remove),
};
-
-module_platform_driver_probe(twl4030_bci_driver, twl4030_bci_probe);
+module_platform_driver(twl4030_bci_driver);
MODULE_AUTHOR("GraÅžvydas Ignotas");
MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
projects / linux-2.6-microblaze.git / commitdiff