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SubjectRe: [PATCH v1 6/6] USB: MUSB: OMAP: get PHY by phandle for dt boot
On Tuesday 22 January 2013 07:47 PM, Roger Quadros wrote:
> On 01/22/2013 11:58 AM, Kishon Vijay Abraham I wrote:
>> The OMAP glue has been modified to get PHY by phandle for dt boot.
>>
>> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
>> ---
>> drivers/usb/musb/omap2430.c | 7 ++++++-
>> 1 file changed, 6 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
>> index 1a8cf6d..e43faeb 100644
>> --- a/drivers/usb/musb/omap2430.c
>> +++ b/drivers/usb/musb/omap2430.c
>> @@ -345,7 +345,12 @@ static int omap2430_musb_init(struct musb *musb)
>> * up through ULPI. TWL4030-family PMICs include one,
>> * which needs a driver, drivers aren't always needed.
>> */
>> - musb->xceiv = devm_usb_get_phy_dev(dev, 0);
>> + if (dev->parent->of_node)
>> + musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent,
>> + "usb_phy", 0);
>> + else
>> + musb->xceiv = devm_usb_get_phy_dev(dev, 0);
>> +
>> if (IS_ERR_OR_NULL(musb->xceiv)) {
>> pr_err("HS USB OTG: no transceiver configured\n");
>> return -ENODEV;
>
> This will not work with PHY driver as a module. You need to use deferred probing mechanism here
> after you have addressed my comment in patch 2 and also devm_usb_get_phy_by_phandle()

IIUC, even using -EPROBE_DEFER might not help if we are making the PHY
driver as module, since the kernel will try to probe only till the
prompt comes.

And having -EPROBE_DEFER instead of -ENODEV might also not help since,
the gadget driver wont be able to bind to UDC (usb_gadget_probe_driver
will fail).

A lot of things need to be changed before we change to -EPROBE_DEFER IMO.

Thanks
Kishon


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