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power: supply: act8945a_charger: Add max current property 

Add the power supply's current max property,
POWER_SUPPLY_PROP_CURRENT_MAX.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Wenyou Yang 2016-09-01 17:29:59 +08:00 committed by Sebastian Reichel
parent 369eba0986
commit 528e350412
1 changed files with 80 additions and 9 deletions
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89
drivers/power/supply/act8945a_charger.c
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@ -13,7 +13,6 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
@ -85,6 +84,7 @@ struct act8945a_charger {
bool init_done;
struct gpio_desc *lbo_gpio;
struct gpio_desc *chglev_gpio;
};
static int act8945a_get_charger_state(struct regmap *regmap, int *val)
@ -265,12 +265,80 @@ static int act8945a_get_capacity_level(struct act8945a_charger *charger,
return 0;
}
#define MAX_CURRENT_USB_HIGH 450000
#define MAX_CURRENT_USB_LOW 90000
#define MAX_CURRENT_USB_PRE 45000
/*
* Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205
* Riset = 2.43K
*/
#define MAX_CURRENT_AC_HIGH 886527
#define MAX_CURRENT_AC_LOW 117305
#define MAX_CURRENT_AC_HIGH_PRE 88653
#define MAX_CURRENT_AC_LOW_PRE 11731
static int act8945a_get_current_max(struct act8945a_charger *charger,
struct regmap *regmap, int *val)
{
int ret;
unsigned int status, state;
unsigned int acin_state;
int chgin_level = gpiod_get_value(charger->chglev_gpio);
ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
if (ret < 0)
return ret;
ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
if (ret < 0)
return ret;
acin_state = (state & APCH_STATE_ACINSTAT) >> 1;
state &= APCH_STATE_CSTATE;
state >>= APCH_STATE_CSTATE_SHIFT;
switch (state) {
case APCH_STATE_CSTATE_PRE:
if (acin_state) {
if (chgin_level)
*val = MAX_CURRENT_AC_HIGH_PRE;
else
*val = MAX_CURRENT_AC_LOW_PRE;
} else {
*val = MAX_CURRENT_USB_PRE;
}
break;
case APCH_STATE_CSTATE_FAST:
if (acin_state) {
if (chgin_level)
*val = MAX_CURRENT_AC_HIGH;
else
*val = MAX_CURRENT_AC_LOW;
} else {
if (chgin_level)
*val = MAX_CURRENT_USB_HIGH;
else
*val = MAX_CURRENT_USB_LOW;
}
break;
case APCH_STATE_CSTATE_EOC:
case APCH_STATE_CSTATE_DISABLED:
default:
*val = 0;
break;
}
return 0;
}
static enum power_supply_property act8945a_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER
};
@ -300,6 +368,10 @@ static int act8945a_charger_get_property(struct power_supply *psy,
ret = act8945a_get_capacity_level(charger,
regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
ret = act8945a_get_current_max(charger,
regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = act8945a_charger_model;
break;
@ -390,13 +462,11 @@ static int act8945a_charger_config(struct device *dev,
struct act8945a_charger *charger)
{
struct device_node *np = dev->of_node;
enum of_gpio_flags flags;
struct regmap *regmap = charger->regmap;
u32 total_time_out;
u32 pre_time_out;
u32 input_voltage_threshold;
int chglev_pin;
int err, ret;
unsigned int tmp;
@ -431,12 +501,13 @@ static int act8945a_charger_config(struct device *dev,
if (ret)
dev_info(dev, "failed to request gpio \"lbo\" IRQ\n");
chglev_pin = of_get_named_gpio_flags(np,
"active-semi,chglev-gpios", 0, &flags);
if (gpio_is_valid(chglev_pin)) {
gpio_set_value(chglev_pin,
((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1));
charger->chglev_gpio = devm_gpiod_get_optional(dev,
"active-semi,chglev",
GPIOD_IN);
if (IS_ERR(charger->chglev_gpio)) {
err = PTR_ERR(charger->chglev_gpio);
dev_err(dev, "unable to claim gpio \"chglev\": %d\n", err);
return err;
}
if (of_property_read_u32(np,