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@xxxxxxxxx>
---
Changes in v7:
- Fix the wrong using devm_request_irq() with with parent
device as *dev.
Changes in v6:
- Add .remove callback function.
- Fix the 'dev' argument of devm_request_irq() to pdev->dev.parent.
Changes in v5: None
Changes in v4:
- Use "interrupts" property, instead of "active-semi,irq-gpios"
for irq.
Changes in v3: None
Changes in v2: None
drivers/power/supply/act8945a_charger.c | 95 ++++++++++++++++++++++++++++++---
1 file changed, 88 insertions(+), 7 deletions(-)
diff --git a/drivers/power/supply/act8945a_charger.c b/drivers/power/supply/act8945a_charger.c
index cee8f75..fd99739 100644
--- a/drivers/power/supply/act8945a_charger.c
+++ b/drivers/power/supply/act8945a_charger.c
@@ -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.parent->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.parent->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);
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
