Hi,
On 07/06/2013 03:52 PM, Ruchika Kharwar wrote:
> This patch adapts the dwc3 to use the device tree helper
> "of_usb_get_dr_mode" for the mode of operation of the dwc3 instance
> being probed.
>
> Signed-off-by: Ruchika Kharwar <[email protected]>
> ---
> drivers/usb/dwc3/core.c | 51
> +++++++++++++++++++++++++----------------------
> drivers/usb/dwc3/core.h | 5 -----
> 2 files changed, 27 insertions(+), 29 deletions(-)
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index c35d49d..7b98e4f 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -517,14 +517,17 @@ static int dwc3_probe(struct platform_device *pdev)
> }
>
> if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
> - mode = DWC3_MODE_HOST;
> + mode = USB_DR_MODE_HOST;
> else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
> - mode = DWC3_MODE_DEVICE;
> + mode = USB_DR_MODE_PERIPHERAL;
> else
> - mode = DWC3_MODE_DRD;
> + mode = of_usb_get_dr_mode(node);
You need to check if "node" is not NULL before using of_usb_get_dr_mode.
Also what would happen if DT passes a mode which can't be supported due to
missing device driver? e.g. DT passes mode = "host" whereas HOST is not enabled.
You need to catch these invalid configuration cases and report an error to
the user.
> +
> + if (mode == USB_DR_MODE_UNKNOWN)
> + mode = USB_DR_MODE_OTG;
>
> switch (mode) {
> - case DWC3_MODE_DEVICE:
> + case USB_DR_MODE_PERIPHERAL:
> dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
> ret = dwc3_gadget_init(dwc);
> if (ret) {
cheers,
-roger
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