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usb: dwc3-msm: Get usb power_supply from device tree

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Not all instances of the controller should be tied to the
USB power_supply. For example in cases of multiple instances,
we do not want all instances manipulating the SDP current
draw by setting the power_supply property, as there is only
usually only a single charger instance.

Replace power_supply lookup by "usb" name to a phandle lookup.
DT must specify a "qcom,usb-charger" property pointing to the
charger instance.

Change-Id: Ibd90337782b23f5e1a1a1c2af5a48c49be37823d
Signed-off-by: Jack Pham <jackp@codeaurora.org>
This commit is contained in:
Jack Pham 2019-10-12 00:09:28 -07:00
commit af34613293
1 changed files with 6 additions and 3 deletions
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9
drivers/usb/dwc3/dwc3-msm.c
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@ -4537,11 +4537,14 @@ static int dwc3_msm_gadget_vbus_draw(struct dwc3_msm *mdwc, unsigned int mA)
int ret;
if (!mdwc->usb_psy) {
mdwc->usb_psy = power_supply_get_by_name("usb");
if (!mdwc->usb_psy) {
dev_err(mdwc->dev, "Could not get usb psy\n");
mdwc->usb_psy = power_supply_get_by_phandle(mdwc->dev->of_node,
"qcom,usb-charger");
if (IS_ERR_OR_NULL(mdwc->usb_psy)) {
dev_info(mdwc->dev, "Could not get usb psy\n");
return -ENODEV;
}
} else if (IS_ERR(mdwc->usb_psy)) {
return 0;
}
if (mdwc->max_power == mA)