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SubjectRe: [PATCH/RFT v2 12/17] USB: ochi-da8xx: Use a regulator for vbus/overcurrent
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On 10/24/2016 11:46 AM, ahaslam@baylibre.com wrote:
> From: Axel Haslam <ahaslam@baylibre.com>
>
> Currently, the da8xx ohci driver uses a set of gpios and callbacks in
> board files to handle vbus and overcurrent irqs form the power supply.
> However, this does not play nice when moving to a DT based boot were
> we wont have board files.
>
> Instead of requesting and handling the gpio, use the regulator framework
> to take care of enabling and disabling vbus power.
> This has the benefit
> that we dont need to pass any more platform data to the driver:
>
> These will be handled by the regulator framework:
> set_power -> regulator_enable/regulator_disable
> get_power -> regulator_is_enabled
> get_oci -> regulator_get_mode
> ocic_notify -> regulator notification
>
> We can keep the default potpgt and use the regulator start delay instead:
> potpgt -> regulator startup delay time
>
> The hawk board does not have a GPIO/OVERCURRENT gpio to control vbus,
> (they should not have been decleared/reserved) so, just remove those
> definitions from the hwk board file.
>
> Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
> ---


How do you recover after an overcurrent event?

I have configured a fixed-regulator using device-tree, but similar to
the configuration in the board files here. However, when I shorted out
the VBUS and caused an overcurrent event, I see nothing in the kernel
log saying that there was an overcurrent event and after I remove the
short, the regulator is never turned back on.



> @@ -163,7 +198,6 @@ static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
> u16 wIndex, char *buf, u16 wLength)
> {
> struct device *dev = hcd->self.controller;
> - struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);

nit: unnecessary whitespace change

> int temp;
>
> switch (typeReq) {

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