On 11/10/2015 07:14 PM, Peter Chen wrote:
> On Tue, Nov 10, 2015 at 04:46:51PM -0800, Tim Bird wrote:
>> This fixes a bug where if you disconnect and re-connect the USB cable,
>> the gadget driver stops working.
>>
>> Add support for async_irq to wake up driver from low power mode.
>> Without this, the power management code never calls resume.
>> Also, have the phy driver kick the gadget driver (chipidea otg)
>> by having the chipidea driver register with it, for vbus connect
>> notifications.
>>
>> Signed-off-by: Tim Bird <tim.bird@xxxxxxxxxxxxxx>
>> ---
>> drivers/usb/chipidea/udc.c | 6 ++++++
>> drivers/usb/phy/phy-msm-usb.c | 16 ++++++++++++++++
>> include/linux/usb/msm_hsusb.h | 1 +
>> 3 files changed, 23 insertions(+)
>>
>> diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
>> index 8223fe7..06234cd 100644
>> --- a/drivers/usb/chipidea/udc.c
>> +++ b/drivers/usb/chipidea/udc.c
>> @@ -1890,6 +1890,12 @@ static int udc_start(struct ci_hdrc *ci)
>>
>> ci->gadget.ep0 = &ci->ep0in->ep;
>>
>> + if (ci->usb_phy) {
>> + retval = otg_set_peripheral(ci->usb_phy->otg, &ci->gadget);
>> + if (retval)
>> + goto destroy_eps;
>> + }
>> +
>> retval = usb_add_gadget_udc(dev, &ci->gadget);
>> if (retval)
>> goto destroy_eps;
>
> Although it looks no affect for other drivers, it is better you
> can split patches between controller and phy, then I can have a test.
OK.
> In fact, most of phy-msm-usb.c's implementations (except USB PHY related)
> are included in chipidea drivers, hope you can try it in future.
I would like to do this. I'm pretty confused about the relationship between
ehci, chipidea and the phy code, with regard to managing the controller
hardware. Is there a phy in mainline that is a good example of having most
of the controller support in the chipidea driver rather than in the phy?
Thanks!
>> diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
>> index 80eb991..eb80f92 100644
>> --- a/drivers/usb/phy/phy-msm-usb.c
>> +++ b/drivers/usb/phy/phy-msm-usb.c
>> @@ -1731,6 +1731,12 @@ static int msm_otg_probe(struct platform_device *pdev)
>> return motg->irq;
>> }
>>
>> + motg->async_irq = platform_get_irq_byname(pdev, "async_irq");
>> + if (motg->async_irq < 0) {
>> + dev_info(&pdev->dev, "platform_get_irq for async_irq failed\n");
>> + motg->async_irq = 0;
>> + }
>> +
>
> dev_err
OK - I'll change this. I've listed the async_irq as optional in the binding doc,
so I don't actually error out, but I was unsure the appropriate error level for
this message.
Thanks for the feedback!
-- Tim
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