Hi Vivek,
> Exynos7 also has a separate special gate clock going to the IP
> apart from the usual AHB clock. So add support for the same.
As we discussed before, Exynos7 SoCs have 7 clocks to be controlled
by the driver. Adding only sclk is not enough.
>
> Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
> ---
> drivers/usb/dwc3/dwc3-exynos.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-
> exynos.c
> index 3951a65..7dc6a98 100644
> --- a/drivers/usb/dwc3/dwc3-exynos.c
> +++ b/drivers/usb/dwc3/dwc3-exynos.c
> @@ -35,6 +35,7 @@ struct dwc3_exynos {
> struct device *dev;
>
> struct clk *clk;
The clock "clk" in Exynos5 just gated all that above 7 clocks, which
we should control separately now in Exynos7.
> + struct clk *sclk;
> struct regulator *vdd33;
> struct regulator *vdd10;
> };
> @@ -139,10 +140,21 @@ static int dwc3_exynos_probe(struct
> platform_device *pdev)
> return -EINVAL;
> }
>
> + /*
> + * Exynos7 has a special gate clock going to this IP,
> + * which in earlier SoCs was probably concealed.
> + */
> + exynos->sclk = devm_clk_get(dev, "usbdrd30_sclk");
> + if (IS_ERR(exynos->sclk)) {
> + dev_info(dev, "no sclk specified\n");
> + exynos->sclk = NULL;
> + }
> +
> exynos->dev = dev;
> exynos->clk = clk;
>
> clk_prepare_enable(exynos->clk);
> + clk_prepare_enable(exynos->sclk);
>
> exynos->vdd33 = devm_regulator_get(dev, "vdd33");
> if (IS_ERR(exynos->vdd33)) {
> @@ -185,6 +197,7 @@ err4:
> err3:
> regulator_disable(exynos->vdd33);
> err2:
> + clk_disable_unprepare(exynos->sclk);
> clk_disable_unprepare(clk);
> return ret;
> }
> @@ -197,6 +210,7 @@ static int dwc3_exynos_remove(struct
> platform_device *pdev)
> platform_device_unregister(exynos->usb2_phy);
> platform_device_unregister(exynos->usb3_phy);
>
> + clk_disable_unprepare(exynos->sclk);
> clk_disable_unprepare(exynos->clk);
>
> regulator_disable(exynos->vdd33);
> @@ -218,6 +232,7 @@ static int dwc3_exynos_suspend(struct device *dev)
> {
> struct dwc3_exynos *exynos = dev_get_drvdata(dev);
>
> + clk_disable(exynos->sclk);
> clk_disable(exynos->clk);
>
> regulator_disable(exynos->vdd33);
> @@ -243,6 +258,7 @@ static int dwc3_exynos_resume(struct device *dev)
> }
>
> clk_enable(exynos->clk);
> + clk_enable(exynos->sclk);
>
> /* runtime set active to reflect active state. */
> pm_runtime_disable(dev);
> --
> 1.7.10.4
>
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