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SubjectRe: [v5,3/5] USB: ohci: da8xx: Allow a regulator to handle VBUS
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On 11/21/2016 04:22 AM, Axel Haslam wrote:
> Hi David,
>
> Thanks for the review,
>

You're welcome.

>>>
>>> @@ -160,15 +212,41 @@ static void ohci_da8xx_ocic_handler(struct
>>> da8xx_ohci_root_hub *hub,
>>> hub->set_power(port, 0);
>>> }
>>>
>>> +static int ohci_da8xx_regulator_event(struct notifier_block *nb,
>>> + unsigned long event, void *data)
>>> +{
>>> + struct da8xx_ohci_hcd *da8xx_ohci =
>>> + container_of(nb, struct da8xx_ohci_hcd,
>>> nb);
>>> + struct device *dev = da8xx_ohci->hcd->self.controller;
>>> +
>>> + if (event & REGULATOR_EVENT_OVER_CURRENT) {
>>> + dev_warn(dev, "over current event\n");
>>
>>
>> Won't this result in duplicate overcurrent warnings in the kernel log? It
>> seems like in previous version of this patch series, we would get an
>> overcurrent error from the core usb driver.
>
> you mean in the regulator driver? i did not make changes to core usb.
> but, no, i did not add a print in the fixed regulator driver itself. Since
> the regulator is a separate driver, and could be implemented with or without
> a trace, i think its better to leave this print. It shows that the usb driver
> has well received the notification.
>

No, I mean in drivers/usb/core/hub.c. There is

if (status & USB_PORT_STAT_OVERCURRENT)
dev_err(&port_dev->dev, "over-current condition\n");

and

if (status & HUB_STATUS_OVERCURRENT)
dev_err(hub_dev, "over-current condition\n");

In ohci_da8xx_hub_control(), we are setting RH_PS_POCI and RH_PS_OCIC,
so these messages will be printed via the core hub driver. We don't need
to print another message from the same event.



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