On 11/01/2017 08:35 AM, Dinh Nguyen wrote:
> The dwc2 USB controller in Stratix10 has an additional ECC reset bit that
> needs to get de-asserted in order for the controller to work properly.
>
> Signed-off-by: Dinh Nguyen <dingu...@kernel.org>
> ---
> drivers/usb/dwc2/core.h | 1 +
> drivers/usb/dwc2/platform.c | 10 ++++++++++
> 2 files changed, 11 insertions(+)
>
> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
> index 8367d4f9..a4b5f4e 100644
> --- a/drivers/usb/dwc2/core.h
> +++ b/drivers/usb/dwc2/core.h
> @@ -920,6 +920,7 @@ struct dwc2_hsotg {
> int irq;
> struct clk *clk;
> struct reset_control *reset;
> + struct reset_control *reset_ecc;
>
> unsigned int queuing_high_bandwidth:1;
> unsigned int srp_success:1;
> diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
> index daf0d37..d466e03 100644
> --- a/drivers/usb/dwc2/platform.c
> +++ b/drivers/usb/dwc2/platform.c
> @@ -220,6 +220,15 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg
> *hsotg)
>
> reset_control_deassert(hsotg->reset);
>
> + hsotg->reset_ecc = devm_reset_control_get_optional(hsotg->dev,
> "dwc2-ecc");
> + if (IS_ERR(hsotg->reset_ecc)) {
> + ret = PTR_ERR(hsotg->reset_ecc);
> + dev_err(hsotg->dev, "error getting reset control for ecc %d\n",
> ret);
> + return ret;
> + }
> +
> + reset_control_deassert(hsotg->reset_ecc);
> +
> /* Set default UTMI width */
> hsotg->phyif = GUSBCFG_PHYIF16;
>
> @@ -318,6 +327,7 @@ static int dwc2_driver_remove(struct platform_device *dev)
> dwc2_lowlevel_hw_disable(hsotg);
>
> reset_control_assert(hsotg->reset);
> + reset_control_assert(hsotg->reset_ecc);
>
> return 0;
> }
>
Acked-by: John Youn <johny...@synopsys.com>
John
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