power: pmic8058-charger: api to get fsm state

Implement an api to return the pmic internal charging state.

Now that we have a enum to define the states, replace the hard-coded
state numbers to enum values.

CRs-Fixed: 299629
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>

drivers/power/pmic8058-charger.c

@@ -26,6 +26,7 @@
 #include <linux/msm_adc.h>
 #include <linux/notifier.h>
 #include <linux/pmic8058-batt-alarm.h>
+#include <linux/pmic8058-charger.h>
 
 #include <mach/msm_xo.h>
 #include <mach/msm_hsusb.h>
@@ -574,6 +575,16 @@ static int get_fsm_status(void *data, u64 * val)
 	return 0;
 }
 
+enum pmic8058_chg_state pmic8058_get_fsm_state(void)
+{
+	if (!pm8058_chg.inited) {
+		pr_err("%s: called when not inited\n", __func__);
+		return -EINVAL;
+	}
+
+	return get_fsm_state();
+}
+
 static int pm_chg_disable(int value)
 {
 	u8 temp;
@@ -720,9 +731,9 @@ static void charging_check_work(struct work_struct *work)
 
 	switch (fsm_state) {
 	/* We're charging, so disarm alarm */
-	case 2:
+	case PMIC8058_CHG_STATE_ATC:
-	case 7:
+	case PMIC8058_CHG_STATE_FAST_CHG:
-	case 8:
+	case PMIC8058_CHG_STATE_TRKL_CHG:
 		rc = pm8058_batt_alarm_state_set(0, 0);
 		if (rc)
 			dev_err(pm8058_chg.dev,

include/linux/pmic8058-charger.h

@@ -12,10 +12,61 @@
 
 #ifndef __PMIC8058_CHARGER_H__
 #define __PMIC8058_CHARGER_H__
+/**
+ * enum pmic8058_chg_state - pmic8058 charging states
+ * @PMIC8058_CHG_STATE_NONE:		Initial off state
+ * @PMIC8058_CHG_STATE_PWR_CHG:		Device powered from charger
+ * @PMIC8058_CHG_STATE_ATC:		Device is Auto Tricke Charged (ATC)
+ * @PMIC8058_CHG_STATE_PWR_BAT:		Device powered from Battery
+ * @PMIC8058_CHG_STATE_ATC_FAIL:	ATC failed
+ * @PMIC8058_CHG_STATE_AUX_EN:		Transient state
+ * @PMIC8058_CHG_STATE_PON_AFTER_ATC:	Power on from battery and chg with limit
+ *					of 90mA
+ * @PMIC8058_CHG_STATE_FAST_CHG:	pmic is fast charging the battery
+ * @PMIC8058_CHG_STATE_TRKL_CHG:	pmic is trck charging the battery
+ * @PMIC8058_CHG_STATE_CHG_FAIL:	charging failed
+ * @PMIC8058_CHG_STATE_EOC:		end of charging reached
+ * @PMIC8058_CHG_STATE_INRUSH_LIMIT:	Brings up Vdd with 90mA max drawn from
+ *					VBUS
+ * @PMIC8058_CHG_STATE_USB_SUSPENDED:	USB supended, no current drawn from VBUS
+ * @PMIC8058_CHG_STATE_PAUSE_ATC:	ATC paused
+ * @PMIC8058_CHG_STATE_PAUSE_FAST_CHG:	FAST charging paused
+ * @PMIC8058_CHG_STATE_PAUSE_TRKL_CHG:	TRLK charging paused
+ *
+ * The paused states happen when a unfavourable condition for charging is
+ * detected. The most common one being the battery gets too hot ot gets
+ * too cold for charging.
+ */
+enum pmic8058_chg_state {
+	PMIC8058_CHG_STATE_NONE,
+	PMIC8058_CHG_STATE_PWR_CHG,
+	PMIC8058_CHG_STATE_ATC,
+	PMIC8058_CHG_STATE_PWR_BAT,
+	PMIC8058_CHG_STATE_ATC_FAIL,
+	PMIC8058_CHG_STATE_AUX_EN,
+	PMIC8058_CHG_STATE_PON_AFTER_ATC,
+	PMIC8058_CHG_STATE_FAST_CHG,
+	PMIC8058_CHG_STATE_TRKL_CHG,
+	PMIC8058_CHG_STATE_CHG_FAIL,
+	PMIC8058_CHG_STATE_EOC,
+	PMIC8058_CHG_STATE_INRUSH_LIMIT,
+	PMIC8058_CHG_STATE_USB_SUSPENDED,
+	PMIC8058_CHG_STATE_PAUSE_ATC,
+	PMIC8058_CHG_STATE_PAUSE_FAST_CHG,
+	PMIC8058_CHG_STATE_PAUSE_TRKL_CHG
+};
 
 #if defined(CONFIG_BATTERY_MSM8X60) || defined(CONFIG_BATTERY_MSM8X60_MODULE)
 int pmic8058_get_charge_batt(void);
 int pmic8058_set_charge_batt(int);
+/**
+ * pmic8058_get_fsm_state -
+ *
+ * CONTEXT: may sleep - should not be called from non-atomic context
+ *
+ * RETURNS: The pmic internal state, or error otherwise
+ */
+enum pmic8058_chg_state pmic8058_get_fsm_state(void);
 #else
 int pmic8058_get_charge_batt(void)
 {
@@ -25,5 +76,9 @@ int pmic8058_set_charge_batt(int)
 {
 	return -ENXIO;
 }
+enum pmic8058_chg_state pmic8058_get_fsm_state(void)
+{
+	return -ENXIO;
+}
 #endif
 #endif /* __PMIC8058_CHARGER_H__ */