@@ -82,8 +82,10 @@ Example:
DWC3
Required properties:
- - compatible: should be "samsung,exynos5250-dwusb3" for USB 3.0 DWC3
- controller.
+ - compatible: should be one of the following -
+ "samsung,exynos5250-dwusb3": for USB 3.0 DWC3 controller on
+ Exynos5250/5420.
+ "samsung,exynos7-dwusb3": for USB 3.0 DWC3 controller on Exynos7.
- #address-cells, #size-cells : should be '1' if the device has sub-nodes
with 'reg' property.
- ranges: allows valid 1:1 translation between child's address space and
@@ -36,6 +36,7 @@ struct dwc3_exynos {
struct clk *clk;
struct clk *susp_clk;
+ struct clk *axius_clk;
struct regulator *vdd33;
struct regulator *vdd10;
@@ -150,6 +151,17 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
}
clk_prepare_enable(exynos->susp_clk);
+ if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) {
+ exynos->axius_clk = devm_clk_get(dev, "usbdrd30_axius_clk");
+ if (IS_ERR(exynos->axius_clk)) {
+ dev_err(dev, "no AXI UpScaler clk specified\n");
+ return -ENODEV;
+ }
+ clk_prepare_enable(exynos->axius_clk);
+ } else {
+ exynos->axius_clk = NULL;
+ }
+
exynos->vdd33 = devm_regulator_get(dev, "vdd33");
if (IS_ERR(exynos->vdd33)) {
ret = PTR_ERR(exynos->vdd33);
@@ -191,6 +203,7 @@ err4:
err3:
regulator_disable(exynos->vdd33);
err2:
+ clk_disable_unprepare(exynos->axius_clk);
clk_disable_unprepare(exynos->susp_clk);
clk_disable_unprepare(exynos->clk);
return ret;
@@ -204,6 +217,7 @@ 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->axius_clk);
clk_disable_unprepare(exynos->susp_clk);
clk_disable_unprepare(exynos->clk);
@@ -216,6 +230,7 @@ static int dwc3_exynos_remove(struct platform_device *pdev)
#ifdef CONFIG_OF
static const struct of_device_id exynos_dwc3_match[] = {
{ .compatible = "samsung,exynos5250-dwusb3" },
+ { .compatible = "samsung,exynos7-dwusb3" },
{},
};
MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
@@ -226,6 +241,7 @@ static int dwc3_exynos_suspend(struct device *dev)
{
struct dwc3_exynos *exynos = dev_get_drvdata(dev);
+ clk_disable(exynos->axius_clk);
clk_disable(exynos->clk);
regulator_disable(exynos->vdd33);
@@ -251,6 +267,7 @@ static int dwc3_exynos_resume(struct device *dev)
}
clk_enable(exynos->clk);
+ clk_enable(exynos->axius_clk);
/* runtime set active to reflect active state. */
pm_runtime_disable(dev);
DWC3 controller on Exynos7 SoC has separate control for AXI UpScaler which connects DWC3 DRD controller to AXI bus. Get the gate clock for the same to control it across power cycles. Suggested-by: Anton Tikhomirov <av.tikhomirov@samsung.com> Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> --- Documentation/devicetree/bindings/usb/exynos-usb.txt | 6 ++++-- drivers/usb/dwc3/dwc3-exynos.c | 17 +++++++++++++++++ 2 files changed, 21 insertions(+), 2 deletions(-)