charger-manager: Support deivce tree in charger manager driver

Charger-manager can parse charger_desc data from devicetree which is used
to register charger manager.

Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>
This commit is contained in:
Jonghwa Lee 2013-12-18 15:42:35 +09:00 committed by Anton Vorontsov
parent 5c49a6256b
commit 856ee6115e
3 changed files with 222 additions and 9 deletions

View File

@ -0,0 +1,81 @@
charger-manager bindings
~~~~~~~~~~~~~~~~~~~~~~~~
Required properties :
- compatible : "charger-manager"
- <>-supply : for regulator consumer
- cm-num-chargers : number of chargers
- cm-chargers : name of chargers
- cm-fuel-gauge : name of battery fuel gauge
- subnode <regulator> :
- cm-regulator-name : name of charger regulator
- subnode <cable> :
- cm-cable-name : name of charger cable
- cm-cable-extcon : name of extcon dev
(optional) - cm-cable-min : minimum current of cable
(optional) - cm-cable-max : maximum current of cable
Optional properties :
- cm-name : charger manager's name (default : "battery")
- cm-poll-mode : polling mode (enum polling_modes)
- cm-poll-interval : polling interval
- cm-battery-stat : battery status (enum data_source)
- cm-fullbatt-* : data for full battery checking
- cm-thermal-zone : name of external thermometer's thermal zone
- cm-battery-* : threshold battery temperature for charging
-cold : critical cold temperature of battery for charging
-cold-in-minus : flag that cold temerature is in minus degree
-hot : critical hot temperature of battery for charging
-temp-diff : temperature difference to allow recharging
- cm-dis/charging-max = limits of charging duration
Example :
charger-manager@0 {
compatible = "charger-manager";
chg-reg-supply = <&charger_regulator>;
cm-name = "battery";
/* Always polling ON : 30s */
cm-poll-mode = <1>;
cm-poll-interval = <30000>;
cm-fullbatt-vchkdrop-ms = <30000>;
cm-fullbatt-vchkdrop-volt = <150000>;
cm-fullbatt-soc = <100>;
cm-battery-stat = <3>;
cm-num-chargers = <3>;
cm-chargers = "charger0", "charger1", "charger2";
cm-fuel-gauge = "fuelgauge0";
cm-thermal-zone = "thermal_zone.1"
/* in deci centigrade */
cm-battery-cold = <50>;
cm-battery-cold-in-minus;
cm-battery-hot = <800>;
cm-battery-temp-diff = <100>;
/* Allow charging for 5hr */
cm-charging-max = <18000000>;
/* Allow discharging for 2hr */
cm-discharging-max = <7200000>;
regulator@0 {
cm-regulator-name = "chg-reg";
cable@0 {
cm-cable-name = "USB";
cm-cable-extcon = "extcon-dev.0";
cm-cable-min = <475000>;
cm-cable-max = <500000>;
};
cable@1 {
cm-cable-name = "TA";
cm-cable-extcon = "extcon-dev.0";
cm-cable-min = <650000>;
cm-cable-max = <675000>;
};
};
};

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@ -25,6 +25,7 @@
#include <linux/power/charger-manager.h>
#include <linux/regulator/consumer.h>
#include <linux/sysfs.h>
#include <linux/of.h>
#include <linux/thermal.h>
/*
@ -528,7 +529,7 @@ static int check_charging_duration(struct charger_manager *cm)
duration = curr - cm->charging_start_time;
if (duration > desc->charging_max_duration_ms) {
dev_info(cm->dev, "Charging duration exceed %lldms\n",
dev_info(cm->dev, "Charging duration exceed %ums\n",
desc->charging_max_duration_ms);
uevent_notify(cm, "Discharging");
try_charger_enable(cm, false);
@ -539,7 +540,7 @@ static int check_charging_duration(struct charger_manager *cm)
if (duration > desc->charging_max_duration_ms &&
is_ext_pwr_online(cm)) {
dev_info(cm->dev, "Discharging duration exceed %lldms\n",
dev_info(cm->dev, "Discharging duration exceed %ums\n",
desc->discharging_max_duration_ms);
uevent_notify(cm, "Recharging");
try_charger_enable(cm, true);
@ -1528,9 +1529,139 @@ static int cm_init_thermal_data(struct charger_manager *cm)
return ret;
}
static struct of_device_id charger_manager_match[] = {
{
.compatible = "charger-manager",
},
{},
};
struct charger_desc *of_cm_parse_desc(struct device *dev)
{
struct charger_desc *desc;
struct device_node *np = dev->of_node;
u32 poll_mode = CM_POLL_DISABLE;
u32 battery_stat = CM_NO_BATTERY;
int num_chgs = 0;
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)
return ERR_PTR(-ENOMEM);
of_property_read_string(np, "cm-name", &desc->psy_name);
of_property_read_u32(np, "cm-poll-mode", &poll_mode);
desc->polling_mode = poll_mode;
of_property_read_u32(np, "cm-poll-interval",
&desc->polling_interval_ms);
of_property_read_u32(np, "cm-fullbatt-vchkdrop-ms",
&desc->fullbatt_vchkdrop_ms);
of_property_read_u32(np, "cm-fullbatt-vchkdrop-volt",
&desc->fullbatt_vchkdrop_uV);
of_property_read_u32(np, "cm-fullbatt-voltage", &desc->fullbatt_uV);
of_property_read_u32(np, "cm-fullbatt-soc", &desc->fullbatt_soc);
of_property_read_u32(np, "cm-fullbatt-capacity",
&desc->fullbatt_full_capacity);
of_property_read_u32(np, "cm-battery-stat", &battery_stat);
desc->battery_present = battery_stat;
/* chargers */
of_property_read_u32(np, "cm-num-chargers", &num_chgs);
if (num_chgs) {
/* Allocate empty bin at the tail of array */
desc->psy_charger_stat = devm_kzalloc(dev, sizeof(char *)
* (num_chgs + 1), GFP_KERNEL);
if (desc->psy_charger_stat) {
int i;
for (i = 0; i < num_chgs; i++)
of_property_read_string_index(np, "cm-chargers",
i, &desc->psy_charger_stat[i]);
} else {
return ERR_PTR(-ENOMEM);
}
}
of_property_read_string(np, "cm-fuel-gauge", &desc->psy_fuel_gauge);
of_property_read_string(np, "cm-thermal-zone", &desc->thermal_zone);
of_property_read_u32(np, "cm-battery-cold", &desc->temp_min);
if (of_get_property(np, "cm-battery-cold-in-minus", NULL))
desc->temp_min *= -1;
of_property_read_u32(np, "cm-battery-hot", &desc->temp_max);
of_property_read_u32(np, "cm-battery-temp-diff", &desc->temp_diff);
of_property_read_u32(np, "cm-charging-max",
&desc->charging_max_duration_ms);
of_property_read_u32(np, "cm-discharging-max",
&desc->discharging_max_duration_ms);
/* battery charger regualtors */
desc->num_charger_regulators = of_get_child_count(np);
if (desc->num_charger_regulators) {
struct charger_regulator *chg_regs;
struct device_node *child;
chg_regs = devm_kzalloc(dev, sizeof(*chg_regs)
* desc->num_charger_regulators,
GFP_KERNEL);
if (!chg_regs)
return ERR_PTR(-ENOMEM);
desc->charger_regulators = chg_regs;
for_each_child_of_node(np, child) {
struct charger_cable *cables;
struct device_node *_child;
of_property_read_string(child, "cm-regulator-name",
&chg_regs->regulator_name);
/* charger cables */
chg_regs->num_cables = of_get_child_count(child);
if (chg_regs->num_cables) {
cables = devm_kzalloc(dev, sizeof(*cables)
* chg_regs->num_cables,
GFP_KERNEL);
if (!cables)
return ERR_PTR(-ENOMEM);
chg_regs->cables = cables;
for_each_child_of_node(child, _child) {
of_property_read_string(_child,
"cm-cable-name", &cables->name);
of_property_read_string(_child,
"cm-cable-extcon",
&cables->extcon_name);
of_property_read_u32(_child,
"cm-cable-min",
&cables->min_uA);
of_property_read_u32(_child,
"cm-cable-max",
&cables->max_uA);
cables++;
}
}
chg_regs++;
}
}
return desc;
}
static inline struct charger_desc *cm_get_drv_data(struct platform_device *pdev)
{
if (pdev->dev.of_node)
return of_cm_parse_desc(&pdev->dev);
return (struct charger_desc *)dev_get_platdata(&pdev->dev);
}
static int charger_manager_probe(struct platform_device *pdev)
{
struct charger_desc *desc = dev_get_platdata(&pdev->dev);
struct charger_desc *desc = cm_get_drv_data(pdev);
struct charger_manager *cm;
int ret = 0, i = 0;
int j = 0;
@ -1887,6 +2018,7 @@ static struct platform_driver charger_manager_driver = {
.name = "charger-manager",
.owner = THIS_MODULE,
.pm = &charger_manager_pm,
.of_match_table = charger_manager_match,
},
.probe = charger_manager_probe,
.remove = charger_manager_remove,

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@ -191,7 +191,7 @@ struct charger_regulator {
* max_duration_ms', cm start charging.
*/
struct charger_desc {
char *psy_name;
const char *psy_name;
enum polling_modes polling_mode;
unsigned int polling_interval_ms;
@ -204,14 +204,14 @@ struct charger_desc {
enum data_source battery_present;
char **psy_charger_stat;
const char **psy_charger_stat;
int num_charger_regulators;
struct charger_regulator *charger_regulators;
char *psy_fuel_gauge;
const char *psy_fuel_gauge;
char *thermal_zone;
const char *thermal_zone;
int temp_min;
int temp_max;
@ -219,8 +219,8 @@ struct charger_desc {
bool measure_battery_temp;
u64 charging_max_duration_ms;
u64 discharging_max_duration_ms;
u32 charging_max_duration_ms;
u32 discharging_max_duration_ms;
};
#define PSY_NAME_MAX 30