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power: supply: act8945a_charger: Add status change update support

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Add the charger status change interrupt support, it will report
the power supply changed event.

This interrupt is generated by one of the conditions as below:
 - the state machine jumps out of or into the EOC state
 - the CHGIN input voltage goes out of or into the valid range.
 - the battery temperature goes out of or into the valid range.
 - the PRECHARGE time-out occurs.
 - the total charge time-out occurs.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Wenyou Yang 2016-08-25 15:19:53 +08:00 committed by Sebastian Reichel
parent 1f0ba4067a
commit a09209acd6
1 changed files with 88 additions and 7 deletions
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95
drivers/power/supply/act8945a_charger.c
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@ -10,9 +10,11 @@
* published by the Free Software Foundation.
*
*/
#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>
#include <linux/regmap.h>
@ -75,7 +77,11 @@ static const char *act8945a_charger_manufacturer = "Active-semi";
#define APCH_STATE_CSTATE_PRE 0x03
struct act8945a_charger {
struct power_supply *psy;
struct regmap *regmap;
struct work_struct work;
bool init_done;
};
static int act8945a_get_charger_state(struct regmap *regmap, int *val)
@ -252,6 +258,47 @@ static const struct power_supply_desc act8945a_charger_desc = {
.num_properties = ARRAY_SIZE(act8945a_charger_props),
};
static int act8945a_enable_interrupt(struct act8945a_charger *charger)
{
struct regmap *regmap = charger->regmap;
unsigned char ctrl;
int ret;
ctrl = APCH_CTRL_CHGEOCOUT | APCH_CTRL_CHGEOCIN |
APCH_CTRL_INDIS | APCH_CTRL_INCON |
APCH_CTRL_TEMPOUT | APCH_CTRL_TEMPIN |
APCH_CTRL_TIMRPRE | APCH_CTRL_TIMRTOT;
ret = regmap_write(regmap, ACT8945A_APCH_CTRL, ctrl);
if (ret)
return ret;
ctrl = APCH_STATUS_CHGSTAT | APCH_STATUS_INSTAT |
APCH_STATUS_TEMPSTAT | APCH_STATUS_TIMRSTAT;
ret = regmap_write(regmap, ACT8945A_APCH_STATUS, ctrl);
if (ret)
return ret;
return 0;
}
static void act8945a_work(struct work_struct *work)
{
struct act8945a_charger *charger =
container_of(work, struct act8945a_charger, work);
power_supply_changed(charger->psy);
}
static irqreturn_t act8945a_status_changed(int irq, void *dev_id)
{
struct act8945a_charger *charger = dev_id;
if (charger->init_done)
schedule_work(&charger->work);
return IRQ_HANDLED;
}
#define DEFAULT_TOTAL_TIME_OUT 3
#define DEFAULT_PRE_TIME_OUT 40
#define DEFAULT_INPUT_OVP_THRESHOLD 6600
@ -362,9 +409,8 @@ static int act8945a_charger_config(struct device *dev,
static int act8945a_charger_probe(struct platform_device *pdev)
{
struct act8945a_charger *charger;
struct power_supply *psy;
struct power_supply_config psy_cfg = {};
int ret;
int irq, ret;
charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
if (!charger)
@ -380,17 +426,51 @@ static int act8945a_charger_probe(struct platform_device *pdev)
if (ret)
return ret;
irq = of_irq_get(pdev->dev.of_node, 0);
if (irq == -EPROBE_DEFER) {
dev_err(&pdev->dev, "failed to find IRQ number\n");
return -EPROBE_DEFER;
}
ret = devm_request_irq(&pdev->dev, irq, act8945a_status_changed,
IRQF_TRIGGER_FALLING, "act8945a_interrupt",
charger);
if (ret) {
dev_err(&pdev->dev, "failed to request nIRQ pin IRQ\n");
return ret;
}
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = charger;
psy = devm_power_supply_register(&pdev->dev,
&act8945a_charger_desc,
&psy_cfg);
if (IS_ERR(psy)) {
charger->psy = devm_power_supply_register(&pdev->dev,
&act8945a_charger_desc,
&psy_cfg);
if (IS_ERR(charger->psy)) {
dev_err(&pdev->dev, "failed to register power supply\n");
return PTR_ERR(psy);
return PTR_ERR(charger->psy);
}
platform_set_drvdata(pdev, charger);
INIT_WORK(&charger->work, act8945a_work);
ret = act8945a_enable_interrupt(charger);
if (ret)
return -EIO;
charger->init_done = true;
return 0;
}
static int act8945a_charger_remove(struct platform_device *pdev)
{
struct act8945a_charger *charger = platform_get_drvdata(pdev);
charger->init_done = false;
cancel_work_sync(&charger->work);
return 0;
}
@ -399,6 +479,7 @@ static struct platform_driver act8945a_charger_driver = {
.name = "act8945a-charger",
},
.probe = act8945a_charger_probe,
.remove = act8945a_charger_remove,
};
module_platform_driver(act8945a_charger_driver);