Add the power supply's current max property,
POWER_SUPPLY_PROP_CURRENT_MAX.
Signed-off-by: Wenyou Yang <wenyou.y...@atmel.com>
---
Changes in v4:
- Fix wrong gpio assignment for chglev_pin.
Changes in v3: None
Changes in v2: None
drivers/power/act8945a_charger.c | 79 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 77 insertions(+), 2 deletions(-)
diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c
index 2321796..9bfbc87 100644
--- a/drivers/power/act8945a_charger.c
+++ b/drivers/power/act8945a_charger.c
@@ -84,6 +84,7 @@ struct act8945a_charger {
bool init_done;
int lbo_pin;
+ int chgin_level;
};
static int act8945a_get_charger_state(struct regmap *regmap, int *val)
@@ -267,12 +268,79 @@ 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;
+
+ 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 (charger->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 (charger->chgin_level)
+ *val = MAX_CURRENT_AC_HIGH;
+ else
+ *val = MAX_CURRENT_AC_LOW;
+ } else {
+ if (charger->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
};
@@ -302,6 +370,10 @@ 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;
@@ -434,8 +506,11 @@ static int act8945a_charger_config(struct device *dev,
"active-semi,chglev-gpios", 0, &flags);
if (gpio_is_valid(chglev_pin)) {
- gpio_set_value(chglev_pin,
- ((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1));
+ if (!devm_gpio_request(dev, chglev_pin, "chglev-pin")) {
+ charger->chgin_level =
+ (flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1;
+ gpio_set_value(chglev_pin, charger->chgin_level);
+ }
}
if (of_property_read_u32(np,
--
2.7.4
