Hi,
On Fri, Jan 23, 2015 at 05:12:56PM +0200, Heikki Krogerus wrote:
> +int dwc3_ulpi_init(struct dwc3 *dwc)
> +{
> + u32 reg;
> +
> + /* First check USB2 PHY interface type */
> + switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
> + case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI:
> + /* Select ULPI Interface */
> + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
> + reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> + /* FALLTHROUGH */
> + case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
> + break;
> + default:
> + return 0;
> + }
> +
> + /* Register the interface */
> + dwc->ulpi = ulpi_register_interface(dwc->dev, &dwc3_ulpi);
> + if (IS_ERR(dwc->ulpi)) {
so, this will only build and link if DWC3_ULPI is enabled, in case of
error you return early...
> + dev_err(dwc->dev, "failed to register ULPI interface");
> + return PTR_ERR(dwc->ulpi);
> + }
> +
> + return 0;
> +}
> +
> +void dwc3_ulpi_exit(struct dwc3 *dwc)
> +{
> + if (dwc->ulpi) {
... looks like this branch is unnecessary.
--
balbi
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