On 4/5/19 2:55 PM, Jean-Jacques Hiblot wrote:
> This allow the phy to enter idle and then suspend.
> the K2 platforms require the PHY to be suspended before the USB domain
> clock can be turned off.
>
> Signed-off-by: Jean-Jacques Hiblot <jjhib...@ti.com>
> ---
>
> drivers/usb/dwc3/core.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index 56e2a046bf..ae01490306 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -581,6 +581,12 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
> return 0;
> }
>
> +static void dwc3_gadget_run(struct dwc3 *dwc)
> +{
> + dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_RUN_STOP);
> + mdelay(100);
That's long, is this really needed ?
> +}
> +
> static void dwc3_core_exit_mode(struct dwc3 *dwc)
> {
> switch (dwc->dr_mode) {
> @@ -598,6 +604,13 @@ static void dwc3_core_exit_mode(struct dwc3 *dwc)
> /* do nothing */
> break;
> }
> +
> + /*
> + * switch back to peripheral mode
> + * This enables the phy to enter idle and then, if enabled, suspend.
> + */
> + dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
> + dwc3_gadget_run(dwc);
> }
>
> #define DWC3_ALIGN_MASK (16 - 1)
>
--
Best regards,
Marek Vasut
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