[PATCH v4 3/7] power: act8945a_charger: Add status change update support

[Wenyou Yang]

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 
---

Changes in v4:
 - Use "interrupts" property, instead of "active-semi,lbo-gpios"
   for irq.

Changes in v3: None
Changes in v2: None

 drivers/power/act8945a_charger.c | 82 
 1 file changed, 75 insertions(+), 7 deletions(-)

diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c
index 6ddfc1d..74778f7 100644
--- a/drivers/power/act8945a_charger.c
+++ b/drivers/power/act8945a_charger.c
@@ -10,9 +10,11 @@
  * published by the Free Software Foundation.
  *
  */
+#include 
 #include 
 #include 
 #include 
+#include 
 #include 
 #include 
 #include 
@@ -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(>work);
+
+   return IRQ_HANDLED;
+}
+
 #define DEFAULT_TOTAL_TIME_OUT 3
 #define DEFAULT_PRE_TIME_OUT   40
 #define DEFAULT_INPUT_OVP_THRESHOLD6600
@@ -360,9 +407,8 @@ 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(>dev, sizeof(*charger), GFP_KERNEL);
if (!charger)
@@ -378,17 +424,39 @@ 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(>dev, "failed to find IRQ number\n");
+   return -EPROBE_DEFER;
+   }
+
+   ret = devm_request_irq(>dev, irq, act8945a_status_changed,
+  IRQF_TRIGGER_FALLING, "act8945a_interrupt",
+  charger);
+   if (ret) {
+   dev_err(>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(>dev,
-_charger_desc,
-_cfg);
-   if (IS_ERR(psy)) {
+   charger->psy = devm_power_supply_register(>dev,
+ _charger_desc,
+ _cfg);
+   if (IS_ERR(charger->psy)) {
dev_err(>dev, "failed to register power supply\n");
-   return PTR_ERR(psy);
+   return PTR_ERR(charger->psy);
}
 
+   INIT_WORK(>work, act8945a_work);
+
+   ret = act8945a_enable_interrupt(charger);
+   if (ret)
+   return -EIO;
+
+   charger->init_done = true;
+
return 0;
 }
 
-- 
2.7.4

[PATCH v4 3/7] power: act8945a_charger: Add status change update support

[Wenyou Yang]

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 
---

Changes in v4:
 - Use "interrupts" property, instead of "active-semi,lbo-gpios"
   for irq.

Changes in v3: None
Changes in v2: None

 drivers/power/act8945a_charger.c | 82 
 1 file changed, 75 insertions(+), 7 deletions(-)

diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c
index 6ddfc1d..74778f7 100644
--- a/drivers/power/act8945a_charger.c
+++ b/drivers/power/act8945a_charger.c
@@ -10,9 +10,11 @@
  * published by the Free Software Foundation.
  *
  */
+#include 
 #include 
 #include 
 #include 
+#include 
 #include 
 #include 
 #include 
@@ -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(>work);
+
+   return IRQ_HANDLED;
+}
+
 #define DEFAULT_TOTAL_TIME_OUT 3
 #define DEFAULT_PRE_TIME_OUT   40
 #define DEFAULT_INPUT_OVP_THRESHOLD6600
@@ -360,9 +407,8 @@ 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(>dev, sizeof(*charger), GFP_KERNEL);
if (!charger)
@@ -378,17 +424,39 @@ 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(>dev, "failed to find IRQ number\n");
+   return -EPROBE_DEFER;
+   }
+
+   ret = devm_request_irq(>dev, irq, act8945a_status_changed,
+  IRQF_TRIGGER_FALLING, "act8945a_interrupt",
+  charger);
+   if (ret) {
+   dev_err(>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(>dev,
-_charger_desc,
-_cfg);
-   if (IS_ERR(psy)) {
+   charger->psy = devm_power_supply_register(>dev,
+ _charger_desc,
+ _cfg);
+   if (IS_ERR(charger->psy)) {
dev_err(>dev, "failed to register power supply\n");
-   return PTR_ERR(psy);
+   return PTR_ERR(charger->psy);
}
 
+   INIT_WORK(>work, act8945a_work);
+
+   ret = act8945a_enable_interrupt(charger);
+   if (ret)
+   return -EIO;
+
+   charger->init_done = true;
+
return 0;
 }
 
-- 
2.7.4