USB: dwc3: Add support to disable battery charging from USB
Some platforms may not support battery charging from USB port.
Hence, allow users to disable battery charging using DT property.
Also, change name of otg-capability DT property to make it less
verbose.
Change-Id: Ie38f31889f9283d8c682aa7943beb160de05429a
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
diff --git a/Documentation/devicetree/bindings/usb/msm-ssusb.txt b/Documentation/devicetree/bindings/usb/msm-ssusb.txt
index 99274d5..57d776f 100644
--- a/Documentation/devicetree/bindings/usb/msm-ssusb.txt
+++ b/Documentation/devicetree/bindings/usb/msm-ssusb.txt
@@ -28,8 +28,10 @@
- interrupt-names : Optional interrupt resource entries are:
"hs_phy_irq" : Interrupt from HSPHY for asynchronous events in LPM.
This is not used if wakeup events are received externally (e.g. PMIC)
-- qcom,dwc-usb3-msm-otg-capability: If present then depends on PMIC
- for VBUS notifications, otherwise depends on PHY.
+- qcom,otg-capability: If present then depend on PMIC for VBUS notifications,
+ otherwise depend on PHY.
+- qcom,charging-disabled: If present then battery charging using USB
+ is disabled.
Example MSM USB3.0 controller device node :
usb@f9200000 {
diff --git a/arch/arm/boot/dts/msm8974-mtp.dtsi b/arch/arm/boot/dts/msm8974-mtp.dtsi
index f4be0dc..6553fc0 100644
--- a/arch/arm/boot/dts/msm8974-mtp.dtsi
+++ b/arch/arm/boot/dts/msm8974-mtp.dtsi
@@ -172,7 +172,7 @@
};
&usb3 {
- qcom,dwc-usb3-msm-otg-capability;
+ qcom,otg-capability;
};
&pm8941_chg {
diff --git a/drivers/usb/dwc3/dwc3-msm.c b/drivers/usb/dwc3/dwc3-msm.c
index 0396040..4073fc8 100644
--- a/drivers/usb/dwc3/dwc3-msm.c
+++ b/drivers/usb/dwc3/dwc3-msm.c
@@ -1768,7 +1768,9 @@
}
msm->ext_xceiv.otg_capability = of_property_read_bool(node,
- "qcom,dwc-usb3-msm-otg-capability");
+ "qcom,otg-capability");
+ msm->charger.charging_disabled = of_property_read_bool(node,
+ "qcom,charging-disabled");
if (!msm->ext_xceiv.otg_capability) {
/* DWC3 has separate IRQ line for OTG events (ID/BSV etc.) */
diff --git a/drivers/usb/dwc3/dwc3_otg.c b/drivers/usb/dwc3/dwc3_otg.c
index 41dd144..7b672c4 100644
--- a/drivers/usb/dwc3/dwc3_otg.c
+++ b/drivers/usb/dwc3/dwc3_otg.c
@@ -393,11 +393,14 @@
struct dwc3_otg *dotg = container_of(phy->otg, struct dwc3_otg, otg);
- if (!dotg->psy) {
- dev_err(phy->dev, "no usb power supply registered\n");
+ if (!dotg->psy || !dotg->charger) {
+ dev_err(phy->dev, "no usb power supply/charger registered\n");
return 0;
}
+ if (dotg->charger->charging_disabled)
+ return 0;
+
if (dotg->charger->chg_type == DWC3_SDP_CHARGER)
power_supply_type = POWER_SUPPLY_TYPE_USB;
else if (dotg->charger->chg_type == DWC3_CDP_CHARGER)
diff --git a/drivers/usb/dwc3/dwc3_otg.h b/drivers/usb/dwc3/dwc3_otg.h
index 4384888..c93ce5f 100644
--- a/drivers/usb/dwc3/dwc3_otg.h
+++ b/drivers/usb/dwc3/dwc3_otg.h
@@ -70,6 +70,7 @@
struct dwc3_charger {
enum dwc3_chg_type chg_type;
unsigned max_power;
+ bool charging_disabled;
/* start/stop charger detection, provided by external charger module */
void (*start_detection)(struct dwc3_charger *charger, bool start);