smb5: report fast charging when a proprietary charger is attached

Android figures out if charging is "rapid" by checking
POWER_SUPPLY_PROP_CURRENT_MAX and when the proprietary charger tech
Xiaomi's using is active that value isn't always reported correctly.
Work around that by reporting an arbitrary value that's high enough to
qualify as "rapid" when a proprietary charger is attached and fully
authenticated (by checking smblib_get_fastcharge_mode() which is a
custom utility function added by Xiaomi). Other charger types (HVDCP/PD)
still use standard smblib_get_prop_input_current_max().

Test: original 33W charger is reported as "rapid" immediately after
plugging it in, a slow charger is still detected as "slow".

Change-Id: I8cfce1f827602d53bbcb90abd76723074281d270
Signed-off-by: Kuba Wojciechowski <[email protected]>
Signed-off-by: UtsavBalar1231 <[email protected]>

drivers/power/supply/qcom/qpnp-smb5.c

@@ -1502,7 +1502,16 @@ static int smb5_usb_get_prop(struct power_supply *psy,
 		val->intval = get_client_vote(chg->usb_icl_votable, PD_VOTER);
 		break;
 	case POWER_SUPPLY_PROP_CURRENT_MAX:
-		rc = smblib_get_prop_input_current_max(chg, val);
+		if (smblib_get_fastcharge_mode(chg))
+	#ifdef CONFIG_BOARD_CAS
+			val->intval = 12000000;
+	#elif defined CONFIG_BOARD_CMI
+			val->intval = 10000000;
+	#else
+			val->intval = 6000000;
+	#endif
+		else
+			rc = smblib_get_prop_input_current_max(chg, val);
 		break;
 	case POWER_SUPPLY_PROP_TYPE:
 		val->intval = POWER_SUPPLY_TYPE_USB_PD;