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power: supply: smb347-charger: Drop pdata support 

There are no platforms using the pdata support, so let's
drop it to simplify the driver.

Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Sebastian Reichel 2020-08-26 16:41:58 +02:00 committed by Sebastian Reichel
parent 44ff56c022
commit b6f3e21b92
2 changed files with 159 additions and 242 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

287
drivers/power/supply/smb347-charger.c
View File

@ -17,9 +17,16 @@
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/power_supply.h>
#include <linux/power/smb347-charger.h>
#include <linux/regmap.h>
#include <dt-bindings/power/summit,smb347-charger.h>
/* Use the default compensation method */
#define SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT -1
/* Use default factory programmed value for hard/soft temperature limit */
#define SMB3XX_TEMP_USE_DEFAULT -273
/*
* Configuration registers. These are mirrored to volatile RAM and can be
* written once %CMD_A_ALLOW_WRITE is set in %CMD_A register. They will be
@ -129,7 +136,52 @@
* @mains_online: is AC/DC input connected
* @usb_online: is USB input connected
* @charging_enabled: is charging enabled
* @pdata: pointer to platform data
* @max_charge_current: maximum current (in uA) the battery can be charged
* @max_charge_voltage: maximum voltage (in uV) the battery can be charged
* @pre_charge_current: current (in uA) to use in pre-charging phase
* @termination_current: current (in uA) used to determine when the
* charging cycle terminates
* @pre_to_fast_voltage: voltage (in uV) treshold used for transitioning to
* pre-charge to fast charge mode
* @mains_current_limit: maximum input current drawn from AC/DC input (in uA)
* @usb_hc_current_limit: maximum input high current (in uA) drawn from USB
* input
* @chip_temp_threshold: die temperature where device starts limiting charge
* current [%100 - %130] (in degree C)
* @soft_cold_temp_limit: soft cold temperature limit [%0 - %15] (in degree C),
* granularity is 5 deg C.
* @soft_hot_temp_limit: soft hot temperature limit [%40 - %55] (in degree C),
* granularity is 5 deg C.
* @hard_cold_temp_limit: hard cold temperature limit [%-5 - %10] (in degree C),
* granularity is 5 deg C.
* @hard_hot_temp_limit: hard hot temperature limit [%50 - %65] (in degree C),
* granularity is 5 deg C.
* @suspend_on_hard_temp_limit: suspend charging when hard limit is hit
* @soft_temp_limit_compensation: compensation method when soft temperature
* limit is hit
* @charge_current_compensation: current (in uA) for charging compensation
* current when temperature hits soft limits
* @use_mains: AC/DC input can be used
* @use_usb: USB input can be used
* @use_usb_otg: USB OTG output can be used (not implemented yet)
* @enable_control: how charging enable/disable is controlled
* (driver/pin controls)
*
* @use_main, @use_usb, and @use_usb_otg are means to enable/disable
* hardware support for these. This is useful when we want to have for
* example OTG charging controlled via OTG transceiver driver and not by
* the SMB347 hardware.
*
* Hard and soft temperature limit values are given as described in the
* device data sheet and assuming NTC beta value is %3750. Even if this is
* not the case, these values should be used. They can be mapped to the
* corresponding NTC beta values with the help of table %2 in the data
* sheet. So for example if NTC beta is %3375 and we want to program hard
* hot limit to be %53 deg C, @hard_hot_temp_limit should be set to %50.
*
* If zero value is given in any of the current and voltage values, the
* factory programmed default will be used. For soft/hard temperature
* values, pass in %SMB3XX_TEMP_USE_DEFAULT instead.
*/
struct smb347_charger {
struct device *dev;
@ -140,7 +192,26 @@ struct smb347_charger {
bool mains_online;
bool usb_online;
bool charging_enabled;
const struct smb347_charger_platform_data *pdata;
unsigned int max_charge_current;
unsigned int max_charge_voltage;
unsigned int pre_charge_current;
unsigned int termination_current;
unsigned int pre_to_fast_voltage;
unsigned int mains_current_limit;
unsigned int usb_hc_current_limit;
unsigned int chip_temp_threshold;
int soft_cold_temp_limit;
int soft_hot_temp_limit;
int hard_cold_temp_limit;
int hard_hot_temp_limit;
bool suspend_on_hard_temp_limit;
unsigned int soft_temp_limit_compensation;
unsigned int charge_current_compensation;
bool use_mains;
bool use_usb;
bool use_usb_otg;
unsigned int enable_control;
};
enum smb_charger_chipid {
@ -235,9 +306,9 @@ static int smb347_update_ps_status(struct smb347_charger *smb)
* Dc and usb are set depending on whether they are enabled in
* platform data _and_ whether corresponding undervoltage is set.
*/
if (smb->pdata->use_mains)
if (smb->use_mains)
dc = !(val & IRQSTAT_E_DCIN_UV_STAT);
if (smb->pdata->use_usb)
if (smb->use_usb)
usb = !(val & IRQSTAT_E_USBIN_UV_STAT);
ret = smb->mains_online != dc || smb->usb_online != usb;
@ -287,7 +358,7 @@ static int smb347_charging_set(struct smb347_charger *smb, bool enable)
{
int ret = 0;
if (smb->pdata->enable_control != SMB347_CHG_ENABLE_SW) {
if (smb->enable_control != SMB3XX_CHG_ENABLE_SW) {
dev_dbg(smb->dev, "charging enable/disable in SW disabled\n");
return 0;
}
@ -339,9 +410,9 @@ static int smb347_set_charge_current(struct smb347_charger *smb)
unsigned int id = smb->id;
int ret;
if (smb->pdata->max_charge_current) {
if (smb->max_charge_current) {
ret = current_to_hw(fcc_tbl[id], ARRAY_SIZE(fcc_tbl[id]),
smb->pdata->max_charge_current);
smb->max_charge_current);
if (ret < 0)
return ret;
@ -352,9 +423,9 @@ static int smb347_set_charge_current(struct smb347_charger *smb)
return ret;
}
if (smb->pdata->pre_charge_current) {
if (smb->pre_charge_current) {
ret = current_to_hw(pcc_tbl[id], ARRAY_SIZE(pcc_tbl[id]),
smb->pdata->pre_charge_current);
smb->pre_charge_current);
if (ret < 0)
return ret;
@ -365,9 +436,9 @@ static int smb347_set_charge_current(struct smb347_charger *smb)
return ret;
}
if (smb->pdata->termination_current) {
if (smb->termination_current) {
ret = current_to_hw(tc_tbl[id], ARRAY_SIZE(tc_tbl[id]),
smb->pdata->termination_current);
smb->termination_current);
if (ret < 0)
return ret;
@ -385,9 +456,9 @@ static int smb347_set_current_limits(struct smb347_charger *smb)
unsigned int id = smb->id;
int ret;
if (smb->pdata->mains_current_limit) {
if (smb->mains_current_limit) {
ret = current_to_hw(icl_tbl[id], ARRAY_SIZE(icl_tbl[id]),
smb->pdata->mains_current_limit);
smb->mains_current_limit);
if (ret < 0)
return ret;
@ -398,9 +469,9 @@ static int smb347_set_current_limits(struct smb347_charger *smb)
return ret;
}
if (smb->pdata->usb_hc_current_limit) {
if (smb->usb_hc_current_limit) {
ret = current_to_hw(icl_tbl[id], ARRAY_SIZE(icl_tbl[id]),
smb->pdata->usb_hc_current_limit);
smb->usb_hc_current_limit);
if (ret < 0)
return ret;
@ -417,8 +488,8 @@ static int smb347_set_voltage_limits(struct smb347_charger *smb)
{
int ret;
if (smb->pdata->pre_to_fast_voltage) {
ret = smb->pdata->pre_to_fast_voltage;
if (smb->pre_to_fast_voltage) {
ret = smb->pre_to_fast_voltage;
/* uV */
ret = clamp_val(ret, 2400000, 3000000) - 2400000;
@ -431,8 +502,8 @@ static int smb347_set_voltage_limits(struct smb347_charger *smb)
return ret;
}
if (smb->pdata->max_charge_voltage) {
ret = smb->pdata->max_charge_voltage;
if (smb->max_charge_voltage) {
ret = smb->max_charge_voltage;
/* uV */
ret = clamp_val(ret, 3500000, 4500000) - 3500000;
@ -454,8 +525,8 @@ static int smb347_set_temp_limits(struct smb347_charger *smb)
int ret = 0;
int val;
if (smb->pdata->chip_temp_threshold) {
val = smb->pdata->chip_temp_threshold;
if (smb->chip_temp_threshold) {
val = smb->chip_temp_threshold;
/* degree C */
val = clamp_val(val, 100, 130) - 100;
@ -468,8 +539,8 @@ static int smb347_set_temp_limits(struct smb347_charger *smb)
return ret;
}
if (smb->pdata->soft_cold_temp_limit != SMB347_TEMP_USE_DEFAULT) {
val = smb->pdata->soft_cold_temp_limit;
if (smb->soft_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT) {
val = smb->soft_cold_temp_limit;
val = clamp_val(val, 0, 15);
val /= 5;
@ -485,8 +556,8 @@ static int smb347_set_temp_limits(struct smb347_charger *smb)
enable_therm_monitor = true;
}
if (smb->pdata->soft_hot_temp_limit != SMB347_TEMP_USE_DEFAULT) {
val = smb->pdata->soft_hot_temp_limit;
if (smb->soft_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) {
val = smb->soft_hot_temp_limit;
val = clamp_val(val, 40, 55) - 40;
val /= 5;
@ -500,8 +571,8 @@ static int smb347_set_temp_limits(struct smb347_charger *smb)
enable_therm_monitor = true;
}
if (smb->pdata->hard_cold_temp_limit != SMB347_TEMP_USE_DEFAULT) {
val = smb->pdata->hard_cold_temp_limit;
if (smb->hard_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT) {
val = smb->hard_cold_temp_limit;
val = clamp_val(val, -5, 10) + 5;
val /= 5;
@ -517,8 +588,8 @@ static int smb347_set_temp_limits(struct smb347_charger *smb)
enable_therm_monitor = true;
}
if (smb->pdata->hard_hot_temp_limit != SMB347_TEMP_USE_DEFAULT) {
val = smb->pdata->hard_hot_temp_limit;
if (smb->hard_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) {
val = smb->hard_hot_temp_limit;
val = clamp_val(val, 50, 65) - 50;
val /= 5;
@ -549,16 +620,16 @@ static int smb347_set_temp_limits(struct smb347_charger *smb)
return ret;
}
if (smb->pdata->suspend_on_hard_temp_limit) {
if (smb->suspend_on_hard_temp_limit) {
ret = regmap_update_bits(smb->regmap, CFG_SYSOK,
CFG_SYSOK_SUSPEND_HARD_LIMIT_DISABLED, 0);
if (ret < 0)
return ret;
}
if (smb->pdata->soft_temp_limit_compensation !=
SMB347_SOFT_TEMP_COMPENSATE_DEFAULT) {
val = smb->pdata->soft_temp_limit_compensation & 0x3;
if (smb->soft_temp_limit_compensation !=
SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT) {
val = smb->soft_temp_limit_compensation & 0x3;
ret = regmap_update_bits(smb->regmap, CFG_THERM,
CFG_THERM_SOFT_HOT_COMPENSATION_MASK,
@ -573,9 +644,9 @@ static int smb347_set_temp_limits(struct smb347_charger *smb)
return ret;
}
if (smb->pdata->charge_current_compensation) {
if (smb->charge_current_compensation) {
val = current_to_hw(ccc_tbl[id], ARRAY_SIZE(ccc_tbl[id]),
smb->pdata->charge_current_compensation);
smb->charge_current_compensation);
if (val < 0)
return val;
@ -634,7 +705,7 @@ static int smb347_hw_init(struct smb347_charger *smb)
goto fail;
/* If USB charging is disabled we put the USB in suspend mode */
if (!smb->pdata->use_usb) {
if (!smb->use_usb) {
ret = regmap_update_bits(smb->regmap, CMD_A,
CMD_A_SUSPEND_ENABLED,
CMD_A_SUSPEND_ENABLED);
@ -647,7 +718,7 @@ static int smb347_hw_init(struct smb347_charger *smb)
* support for driving VBUS. Otherwise we disable it.
*/
ret = regmap_update_bits(smb->regmap, CFG_OTHER, CFG_OTHER_RID_MASK,
smb->pdata->use_usb_otg ? CFG_OTHER_RID_ENABLED_AUTO_OTG : 0);
smb->use_usb_otg ? CFG_OTHER_RID_ENABLED_AUTO_OTG : 0);
if (ret < 0)
goto fail;
@ -656,11 +727,11 @@ static int smb347_hw_init(struct smb347_charger *smb)
* command register unless pin control is specified in the platform
* data.
*/
switch (smb->pdata->enable_control) {
case SMB347_CHG_ENABLE_PIN_ACTIVE_LOW:
switch (smb->enable_control) {
case SMB3XX_CHG_ENABLE_PIN_ACTIVE_LOW:
val = CFG_PIN_EN_CTRL_ACTIVE_LOW;
break;
case SMB347_CHG_ENABLE_PIN_ACTIVE_HIGH:
case SMB3XX_CHG_ENABLE_PIN_ACTIVE_HIGH:
val = CFG_PIN_EN_CTRL_ACTIVE_HIGH;
break;
default:
@ -729,9 +800,9 @@ static irqreturn_t smb347_interrupt(int irq, void *data)
*/
if (stat_c & STAT_C_CHARGER_ERROR) {
dev_err(smb->dev, "charging stopped due to charger error\n");
if (smb->pdata->use_mains)
if (smb->use_mains)
power_supply_changed(smb->mains);
if (smb->pdata->use_usb)
if (smb->use_usb)
power_supply_changed(smb->usb);
handled = true;
}
@ -743,9 +814,9 @@ static irqreturn_t smb347_interrupt(int irq, void *data)
*/
if (irqstat_c & (IRQSTAT_C_TERMINATION_IRQ | IRQSTAT_C_TAPER_IRQ)) {
if (irqstat_c & IRQSTAT_C_TERMINATION_STAT) {
if (smb->pdata->use_mains)
if (smb->use_mains)
power_supply_changed(smb->mains);
if (smb->pdata->use_usb)
if (smb->use_usb)
power_supply_changed(smb->usb);
}
dev_dbg(smb->dev, "going to HW maintenance mode\n");
@ -761,9 +832,9 @@ static irqreturn_t smb347_interrupt(int irq, void *data)
if (irqstat_d & IRQSTAT_D_CHARGE_TIMEOUT_STAT)
dev_warn(smb->dev, "charging stopped due to timeout\n");
if (smb->pdata->use_mains)
if (smb->use_mains)
power_supply_changed(smb->mains);
if (smb->pdata->use_usb)
if (smb->use_usb)
power_supply_changed(smb->usb);
handled = true;
}
@ -775,9 +846,9 @@ static irqreturn_t smb347_interrupt(int irq, void *data)
if (irqstat_e & (IRQSTAT_E_USBIN_UV_IRQ | IRQSTAT_E_DCIN_UV_IRQ)) {
if (smb347_update_ps_status(smb) > 0) {
smb347_start_stop_charging(smb);
if (smb->pdata->use_mains)
if (smb->use_mains)
power_supply_changed(smb->mains);
if (smb->pdata->use_usb)
if (smb->use_usb)
power_supply_changed(smb->usb);
}
handled = true;
@ -832,25 +903,10 @@ static inline int smb347_irq_disable(struct smb347_charger *smb)
static int smb347_irq_init(struct smb347_charger *smb,
struct i2c_client *client)
{
const struct smb347_charger_platform_data *pdata = smb->pdata;
unsigned long irqflags = IRQF_ONESHOT;
int ret;
/* Requesting GPIO for IRQ is only needed in non-DT way */
if (!client->irq) {
int irq = gpio_to_irq(pdata->irq_gpio);
ret = devm_gpio_request_one(smb->dev, pdata->irq_gpio,
GPIOF_IN, client->name);
if (ret < 0)
return ret;
irqflags |= IRQF_TRIGGER_FALLING;
client->irq = irq;
}
ret = devm_request_threaded_irq(smb->dev, client->irq, NULL,
smb347_interrupt, irqflags,
smb347_interrupt, IRQF_ONESHOT,
client->name, smb);
if (ret < 0)
return ret;
@ -1118,56 +1174,52 @@ static bool smb347_readable_reg(struct device *dev, unsigned int reg)
return smb347_volatile_reg(dev, reg);
}
static void smb347_dt_parse_pdata(struct device_node *np,
struct smb347_charger_platform_data *pdata)
static void smb347_dt_parse_dev_info(struct smb347_charger *smb)
{
pdata->soft_temp_limit_compensation =
SMB347_SOFT_TEMP_COMPENSATE_DEFAULT;
struct device_node *np = smb->dev->of_node;
smb->soft_temp_limit_compensation =
SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT;
/*
* These properties come from the battery info, still we need to
* pre-initialize the values. See smb347_get_battery_info() below.
*/
pdata->soft_cold_temp_limit = SMB347_TEMP_USE_DEFAULT;
pdata->hard_cold_temp_limit = SMB347_TEMP_USE_DEFAULT;
pdata->soft_hot_temp_limit = SMB347_TEMP_USE_DEFAULT;
pdata->hard_hot_temp_limit = SMB347_TEMP_USE_DEFAULT;
smb->soft_cold_temp_limit = SMB3XX_TEMP_USE_DEFAULT;
smb->hard_cold_temp_limit = SMB3XX_TEMP_USE_DEFAULT;
smb->soft_hot_temp_limit = SMB3XX_TEMP_USE_DEFAULT;
smb->hard_hot_temp_limit = SMB3XX_TEMP_USE_DEFAULT;
/* Charging constraints */
of_property_read_u32(np, "summit,fast-voltage-threshold-microvolt",
&pdata->pre_to_fast_voltage);
&smb->pre_to_fast_voltage);
of_property_read_u32(np, "summit,mains-current-limit-microamp",
&pdata->mains_current_limit);
&smb->mains_current_limit);
of_property_read_u32(np, "summit,usb-current-limit-microamp",
&pdata->usb_hc_current_limit);
&smb->usb_hc_current_limit);
/* For thermometer monitoring */
of_property_read_u32(np, "summit,chip-temperature-threshold-celsius",
&pdata->chip_temp_threshold);
&smb->chip_temp_threshold);
of_property_read_u32(np, "summit,soft-compensation-method",
&pdata->soft_temp_limit_compensation);
&smb->soft_temp_limit_compensation);
of_property_read_u32(np, "summit,charge-current-compensation-microamp",
&pdata->charge_current_compensation);
&smb->charge_current_compensation);
/* Supported charging mode */
pdata->use_mains =
smb->use_mains =
of_property_read_bool(np, "summit,enable-mains-charging");
pdata->use_usb =
smb->use_usb =
of_property_read_bool(np, "summit,enable-usb-charging");
pdata->use_usb_otg =
smb->use_usb_otg =
of_property_read_bool(np, "summit,enable-otg-charging");
/* Select charging control */
of_property_read_u32(np, "summit,enable-charge-control",
&pdata->enable_control);
/* Interrupt support is optional */
if (!of_find_property(np, "interrupts", NULL))
pdata->irq_gpio = -1;
&smb->enable_control);
}
static int smb347_get_battery_info(struct smb347_charger *smb)
{
struct smb347_charger_platform_data *pdata = (void *)smb->pdata;
struct power_supply_battery_info info = {};
struct power_supply *supply;
int err;
@ -1184,53 +1236,37 @@ static int smb347_get_battery_info(struct smb347_charger *smb)
return err;
if (info.constant_charge_current_max_ua != -EINVAL)
pdata->max_charge_current = info.constant_charge_current_max_ua;
smb->max_charge_current = info.constant_charge_current_max_ua;
if (info.constant_charge_voltage_max_uv != -EINVAL)
pdata->max_charge_voltage = info.constant_charge_voltage_max_uv;
smb->max_charge_voltage = info.constant_charge_voltage_max_uv;
if (info.precharge_current_ua != -EINVAL)
pdata->pre_charge_current = info.precharge_current_ua;
smb->pre_charge_current = info.precharge_current_ua;
if (info.charge_term_current_ua != -EINVAL)
pdata->termination_current = info.charge_term_current_ua;
smb->termination_current = info.charge_term_current_ua;
if (info.temp_alert_min != INT_MIN)
pdata->soft_cold_temp_limit = info.temp_alert_min;
smb->soft_cold_temp_limit = info.temp_alert_min;
if (info.temp_alert_max != INT_MAX)
pdata->soft_hot_temp_limit = info.temp_alert_max;
smb->soft_hot_temp_limit = info.temp_alert_max;
if (info.temp_min != INT_MIN)
pdata->hard_cold_temp_limit = info.temp_min;
smb->hard_cold_temp_limit = info.temp_min;
if (info.temp_max != INT_MAX)
pdata->hard_hot_temp_limit = info.temp_max;
smb->hard_hot_temp_limit = info.temp_max;
/* Suspend when battery temperature is outside hard limits */
if (pdata->hard_cold_temp_limit != SMB347_TEMP_USE_DEFAULT ||
pdata->hard_hot_temp_limit != SMB347_TEMP_USE_DEFAULT)
pdata->suspend_on_hard_temp_limit = true;
if (smb->hard_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT ||
smb->hard_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT)
smb->suspend_on_hard_temp_limit = true;
return 0;
}
static struct smb347_charger_platform_data
*smb347_get_platdata(struct device *dev)
{
struct smb347_charger_platform_data *pdata;
if (dev->of_node) {
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (pdata)
smb347_dt_parse_pdata(dev->of_node, pdata);
} else {
pdata = dev_get_platdata(dev);
}
return pdata;
}
static const struct regmap_config smb347_regmap = {
.reg_bits = 8,
.val_bits = 8,
@ -1266,18 +1302,13 @@ static int smb347_probe(struct i2c_client *client,
smb = devm_kzalloc(dev, sizeof(*smb), GFP_KERNEL);
if (!smb)
return -ENOMEM;
smb->pdata = smb347_get_platdata(dev);
if (!smb->pdata)
return -ENODEV;
if (!smb->pdata->use_mains && !smb->pdata->use_usb)
return -EINVAL;
i2c_set_clientdata(client, smb);
smb->dev = &client->dev;
smb->id = id->driver_data;
i2c_set_clientdata(client, smb);
smb347_dt_parse_dev_info(smb);
if (!smb->use_mains && !smb->use_usb)
return -EINVAL;
smb->regmap = devm_regmap_init_i2c(client, &smb347_regmap);
if (IS_ERR(smb->regmap))
@ -1285,14 +1316,14 @@ static int smb347_probe(struct i2c_client *client,
mains_usb_cfg.drv_data = smb;
mains_usb_cfg.of_node = dev->of_node;
if (smb->pdata->use_mains) {
if (smb->use_mains) {
smb->mains = devm_power_supply_register(dev, &smb347_mains_desc,
&mains_usb_cfg);
if (IS_ERR(smb->mains))
return PTR_ERR(smb->mains);
}
if (smb->pdata->use_usb) {
if (smb->use_usb) {
smb->usb = devm_power_supply_register(dev, &smb347_usb_desc,
&mains_usb_cfg);
if (IS_ERR(smb->usb))
@ -1311,7 +1342,7 @@ static int smb347_probe(struct i2c_client *client,
* Interrupt pin is optional. If it is connected, we setup the
* interrupt support here.
*/
if (smb->pdata->irq_gpio >= 0) {
if (client->irq) {
ret = smb347_irq_init(smb, client);
if (ret < 0) {
dev_warn(dev, "failed to initialize IRQ: %d\n", ret);

114
include/linux/power/smb347-charger.h
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@ -1,114 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Summit Microelectronics SMB347 Battery Charger Driver
*
* Copyright (C) 2011, Intel Corporation
*
* Authors: Bruce E. Robertson <bruce.e.robertson@intel.com>
* Mika Westerberg <mika.westerberg@linux.intel.com>
*/
#ifndef SMB347_CHARGER_H
#define SMB347_CHARGER_H
#include <linux/types.h>
#include <linux/power_supply.h>
enum {
/* use the default compensation method */
SMB347_SOFT_TEMP_COMPENSATE_DEFAULT = -1,
SMB347_SOFT_TEMP_COMPENSATE_NONE,
SMB347_SOFT_TEMP_COMPENSATE_CURRENT,
SMB347_SOFT_TEMP_COMPENSATE_VOLTAGE,
};
/* Use default factory programmed value for hard/soft temperature limit */
#define SMB347_TEMP_USE_DEFAULT -273
/*
* Charging enable can be controlled by software (via i2c) by
* smb347-charger driver or by EN pin (active low/high).
*/
enum smb347_chg_enable {
SMB347_CHG_ENABLE_SW,
SMB347_CHG_ENABLE_PIN_ACTIVE_LOW,
SMB347_CHG_ENABLE_PIN_ACTIVE_HIGH,
};
/**
* struct smb347_charger_platform_data - platform data for SMB347 charger
* @battery_info: Information about the battery
* @max_charge_current: maximum current (in uA) the battery can be charged
* @max_charge_voltage: maximum voltage (in uV) the battery can be charged
* @pre_charge_current: current (in uA) to use in pre-charging phase
* @termination_current: current (in uA) used to determine when the
* charging cycle terminates
* @pre_to_fast_voltage: voltage (in uV) treshold used for transitioning to
* pre-charge to fast charge mode
* @mains_current_limit: maximum input current drawn from AC/DC input (in uA)
* @usb_hc_current_limit: maximum input high current (in uA) drawn from USB
* input
* @chip_temp_threshold: die temperature where device starts limiting charge
* current [%100 - %130] (in degree C)
* @soft_cold_temp_limit: soft cold temperature limit [%0 - %15] (in degree C),
* granularity is 5 deg C.
* @soft_hot_temp_limit: soft hot temperature limit [%40 - %55] (in degree C),
* granularity is 5 deg C.
* @hard_cold_temp_limit: hard cold temperature limit [%-5 - %10] (in degree C),
* granularity is 5 deg C.
* @hard_hot_temp_limit: hard hot temperature limit [%50 - %65] (in degree C),
* granularity is 5 deg C.
* @suspend_on_hard_temp_limit: suspend charging when hard limit is hit
* @soft_temp_limit_compensation: compensation method when soft temperature
* limit is hit
* @charge_current_compensation: current (in uA) for charging compensation
* current when temperature hits soft limits
* @use_mains: AC/DC input can be used
* @use_usb: USB input can be used
* @use_usb_otg: USB OTG output can be used (not implemented yet)
* @irq_gpio: GPIO number used for interrupts (%-1 if not used)
* @enable_control: how charging enable/disable is controlled
* (driver/pin controls)
*
* @use_main, @use_usb, and @use_usb_otg are means to enable/disable
* hardware support for these. This is useful when we want to have for
* example OTG charging controlled via OTG transceiver driver and not by
* the SMB347 hardware.
*
* Hard and soft temperature limit values are given as described in the
* device data sheet and assuming NTC beta value is %3750. Even if this is
* not the case, these values should be used. They can be mapped to the
* corresponding NTC beta values with the help of table %2 in the data
* sheet. So for example if NTC beta is %3375 and we want to program hard
* hot limit to be %53 deg C, @hard_hot_temp_limit should be set to %50.
*
* If zero value is given in any of the current and voltage values, the
* factory programmed default will be used. For soft/hard temperature
* values, pass in %SMB347_TEMP_USE_DEFAULT instead.
*/
struct smb347_charger_platform_data {
struct power_supply_info battery_info;
unsigned int max_charge_current;
unsigned int max_charge_voltage;
unsigned int pre_charge_current;
unsigned int termination_current;
unsigned int pre_to_fast_voltage;
unsigned int mains_current_limit;
unsigned int usb_hc_current_limit;
unsigned int chip_temp_threshold;
int soft_cold_temp_limit;
int soft_hot_temp_limit;
int hard_cold_temp_limit;
int hard_hot_temp_limit;
bool suspend_on_hard_temp_limit;
unsigned int soft_temp_limit_compensation;
unsigned int charge_current_compensation;
bool use_mains;
bool use_usb;
bool use_usb_otg;
int irq_gpio;
enum smb347_chg_enable enable_control;
};
#endif /* SMB347_CHARGER_H */