Support wireless power source as charger input.

sgm415x:
Support wireless power source as charger input.

Change-Id: Iad9cd8526aa1697b9d749264b27e1d0db06e0ac0
Reviewed-on: https://gerrit.mot.com/2417538
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Jianqi Yang <yangj@motorola.com>
Submit-Approved: Jira Key

drivers/power/sgm4154x_charger_lite/sgm4154x_charger_lite.c

@@ -1816,6 +1816,14 @@ static int sgm4154x_parse_dt(struct sgm4154x_device *sgm)
 	    sgm->init_data.ilim < SGM4154x_IINDPM_I_MIN_uA)
 		return -EINVAL;
 
+	ret = device_property_read_u32(sgm->dev,
+				       "wls-current-limit-microamp",
+				       &sgm->init_data.wlim);
+	if (ret)
+		sgm->init_data.wlim = SGM4154x_IINDPM_I_MIN_uA;
+
+	pr_info("wireless input current limit: %duA\n", sgm->init_data.wlim);
+
 	irq_gpio = of_get_named_gpio(sgm->dev->of_node, "sgm,irq-gpio", 0);
 	if (!gpio_is_valid(irq_gpio))
 	{
@@ -2271,6 +2279,25 @@ static int sgm4154x_charger_get_chg_info(void *data, struct mmi_charger_info *ch
         return 0;
 }
 
+static int is_wls_online(struct sgm_mmi_charger *chg)
+{
+	int rc;
+	union power_supply_propval val;
+
+	if (!chg->wls_psy)
+		return 0;
+
+	rc = power_supply_get_property(chg->wls_psy,
+			POWER_SUPPLY_PROP_ONLINE, &val);
+	if (rc < 0) {
+		pr_err("Error wls online rc = %d\n", rc);
+		return 0;
+	}
+
+	pr_debug("wireless online is %d", val.intval);
+	return val.intval;
+}
+
 static int sgm4154x_charger_config_charge(void *data, struct mmi_charger_cfg *config)
 {
 	int rc;
@@ -2522,7 +2549,12 @@ static int sgm4154x_charger_config_charge(void *data, struct mmi_charger_cfg *co
 		if (curr_in_limit > chg->sgm->init_data.ilim)
 			curr_in_limit = chg->sgm->init_data.ilim;
 	} else if (!chg->chg_info.chrg_present) {
-		curr_in_limit = 0;
+		if (is_wls_online(chg) && chg->sgm->init_data.wlim) {
+			curr_in_limit = chg->sgm->init_data.wlim;
+			pr_info("wireless is on, set current limit to %d", curr_in_limit);
+		} else {
+			curr_in_limit = 0;
+		}
 	}
 
 	if (chg->sgm->ilim != curr_in_limit) {
@@ -2782,6 +2814,15 @@ static int sgm4154x_mmi_charger_init(struct sgm_mmi_charger *chg)
 		pr_info("%s power supply is found\n", chg->fg_psy_name);
 	}
 
+	if (!chg->wls_psy) {
+		chg->wls_psy = power_supply_get_by_name("wireless");
+		if (!chg->wls_psy) {
+			pr_err("wireless power supply found\n");
+			return -ENODEV;
+		}
+		pr_info("wireless power supply is found\n");
+	}
+
 	if (chg->driver) {
 		pr_info("sgm4154x_mmi_charger has already registered\n");
 		return 0;

drivers/power/sgm4154x_charger_lite/sgm4154x_charger_lite.h

@@ -221,6 +221,7 @@
 struct sgm4154x_init_data {
 	u32 ichg;	/* charge current		*/
 	u32 ilim;	/* input current		*/
+	u32 wlim;	/* wireless input current	*/
 	u32 vreg;	/* regulation voltage		*/
 	u32 iterm;	/* termination current		*/
 	u32 iprechg;	/* precharge current		*/
@@ -287,6 +288,7 @@ struct sgm_mmi_charger {
 	u32				chrg_taper_cnt;
 	const char			*fg_psy_name;
 	struct power_supply		*fg_psy;
+	struct power_supply		*wls_psy;
 	int ichg_polority;
 
 	int paired_ichg;