@@ -35,6 +35,8 @@ struct dwc3_exynos {
struct device *dev;
struct clk *clk;
+ struct clk *susp_clk;
+
struct regulator *vdd33;
struct regulator *vdd10;
};
@@ -141,6 +143,13 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
}
clk_prepare_enable(exynos->clk);
+ exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk");
+ if (IS_ERR(exynos->susp_clk)) {
+ dev_dbg(dev, "no suspend clk specified\n");
+ exynos->susp_clk = NULL;
+ }
+ clk_prepare_enable(exynos->susp_clk);
+
exynos->vdd33 = devm_regulator_get(dev, "vdd33");
if (IS_ERR(exynos->vdd33)) {
ret = PTR_ERR(exynos->vdd33);
@@ -182,6 +191,7 @@ err4:
err3:
regulator_disable(exynos->vdd33);
err2:
+ clk_disable_unprepare(exynos->susp_clk);
clk_disable_unprepare(exynos->clk);
return ret;
}
@@ -194,6 +204,7 @@ 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->susp_clk);
clk_disable_unprepare(exynos->clk);
regulator_disable(exynos->vdd33);
DWC3 controller on Exynos SoC series have separate control for suspend clock which replaces pipe3_rx_pclk as clock source to a small part of DWC3 core that operates when SS PHY is in its lowest power state (P3) in states SS.disabled and U3. Suggested-by: Anton Tikhomirov <av.tikhomirov@samsung.com> Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> --- drivers/usb/dwc3/dwc3-exynos.c | 11 +++++++++++ 1 file changed, 11 insertions(+)