Hi Robert,
On 9/12/14, 7:13 AM, Robert Baldyga wrote:
> Hi Dinh,
>
> On 08/26/2014 06:19 PM, dingu...@opensource.altera.com wrote:
>> From: Dinh Nguyen <dingu...@opensource.altera.com>
>>
>> Add the proper init calls for either host, gadget or both in platform.c
>>
>> Signed-off-by: Dinh Nguyen <dingu...@opensource.altera.com>
>> Acked-by: Paul Zimmerman <pa...@synopsys.com>
>> ---
>> drivers/usb/dwc2/core.h | 13 +++++++++++++
>> drivers/usb/dwc2/gadget.c | 2 +-
>> drivers/usb/dwc2/platform.c | 28 ++++++++++++++++++++++++----
>> 3 files changed, 38 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
>> index f55e62d..3a49a00 100644
>> --- a/drivers/usb/dwc2/core.h
>> +++ b/drivers/usb/dwc2/core.h
>> @@ -960,6 +960,19 @@ extern void dwc2_dump_global_registers(struct
>> dwc2_hsotg *hsotg);
>> */
>> extern u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg);
>>
>> +/* Gadget defines */
>> +#if defined(CONFIG_USB_DWC2_PERIPHERAL) ||
>> defined(CONFIG_USB_DWC2_DUAL_ROLE)
>> +extern int s3c_hsotg_remove(struct dwc2_hsotg *hsotg);
>> +extern void s3c_hsotg_core_init(struct dwc2_hsotg *dwc2);
>
> Function s3c_hsotg_core_init() is used only inside file gadget.c so
> exporting it makes no sense. By the way it should be static.
Yes, I agree here. Fixed up in v5.
>
>> +extern int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq);
>> +#else
>> +static inline void s3c_hsotg_core_init(struct dwc2_hsotg *dwc2) {}
>> +static inline int s3c_hsotg_remove(struct dwc2_hsotg *dwc2)
>> +{ return 0; }
>> +static inline int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
>> +{ return 0; }
>
> It also makes no sense to have this functions declared if you don't have
> to use them. They are called in one place in code, inside
> dwc2_driver_probe() function, so you can rather use if defined() there.
I'm not sure I agree here. This is necessary for the current runtime
implementation of the role initialization. This is probably relevant
with your next 2 comments.
>
>> +#endif
>> +
>> #if defined(CONFIG_USB_DWC2_HOST) || defined(CONFIG_USB_DWC2_DUAL_ROLE)
>> /**
>> * dwc2_hcd_get_frame_number() - Returns current frame number
>> diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
>> index 96f868f..efa68a0 100644
>> --- a/drivers/usb/dwc2/gadget.c
>> +++ b/drivers/usb/dwc2/gadget.c
>> @@ -3572,7 +3572,7 @@ err_clk:
>> * s3c_hsotg_remove - remove function for hsotg driver
>> * @pdev: The platform information for the driver
>> */
>> -static int s3c_hsotg_remove(struct dwc2_hsotg *hsotg)
>> +int s3c_hsotg_remove(struct dwc2_hsotg *hsotg)
>> {
>> usb_del_gadget_udc(&hsotg->gadget);
>>
>> diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
>> index dd2f8f5..2871f351 100644
>> --- a/drivers/usb/dwc2/platform.c
>> +++ b/drivers/usb/dwc2/platform.c
>> @@ -92,7 +92,14 @@ static int dwc2_driver_remove(struct platform_device *dev)
>> {
>> struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
>>
>> - dwc2_hcd_remove(hsotg);
>> + if (IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL))
>> + s3c_hsotg_remove(hsotg);
>> + else if (IS_ENABLED(CONFIG_USB_DWC2_HOST))
>> + dwc2_hcd_remove(hsotg);
>> + else { /* dual role */
>> + dwc2_hcd_remove(hsotg);
>> + s3c_hsotg_remove(hsotg);
>> + }
>
> Why don't make this checks compile-time?
>
Do you have a reason for a compile-time versus runtime here? It just
seems that from a few discussion threads on lkml that there is a general
biased towards using IS_ENABLED() as it looks a bit cleaner than
littering the code with a bunch of #ifdefs.
Dinh
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