usb: dwc3-msm: Add support for proprietary charger detection
Proprietary chargers pull D+/- to specific voltages between 2.0-3.3V
(VLGC) for identification. The DM voltage may not exceed VLGC due
to pull-down resistor. Hence a proprietary charger is detected as
a Standard downstream port (SDP). Read line state to distinguish
between SDP and proprietary charger. The DP voltage would exceed
VLGC for proprietary chargers.
CRs-fixed: 383075
Change-Id: Ic9afbdd0996a4c1c7a2af76cd99182d8ae5f3b68
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
diff --git a/drivers/usb/dwc3/dwc3_otg.h b/drivers/usb/dwc3/dwc3_otg.h
index 07d6411..d3b1b4a 100644
--- a/drivers/usb/dwc3/dwc3_otg.h
+++ b/drivers/usb/dwc3/dwc3_otg.h
@@ -61,12 +61,15 @@
* DWC3_DCP_CHARGER Dedicated charger port (AC charger/ Wall charger).
* DWC3_CDP_CHARGER Charging downstream port. Enumeration can happen and
* IDEV_CHG_MAX can be drawn irrespective of USB state.
+ * DWC3_PROPRIETARY_CHARGER A proprietary charger pull DP and DM to specific
+ * voltages between 2.0-3.3v for identification.
*/
enum dwc3_chg_type {
DWC3_INVALID_CHARGER = 0,
DWC3_SDP_CHARGER,
DWC3_DCP_CHARGER,
DWC3_CDP_CHARGER,
+ DWC3_PROPRIETARY_CHARGER,
};
struct dwc3_charger {