diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2018-09-18 10:16:52 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-10-02 09:33:01 +0200 |
| commit | 4c19cc14064d99ef0a20fb5ba0d45c94dbedb13c (patch) | |
| tree | 2ba6918a4e234d18a9388585377a317562559bb4 /Documentation/devicetree | |
| parent | usb: dwc3: exynos: Rework clock handling and prepare for new variants (diff) | |
| download | linux-4c19cc14064d99ef0a20fb5ba0d45c94dbedb13c.tar.xz linux-4c19cc14064d99ef0a20fb5ba0d45c94dbedb13c.zip | |
usb: dwc3: exynos: Add support for Exynos5433 variant with all clocks
DWC3 variant found in Exynos5433 SoCs requires keeping all DRD30/UHOST30
clocks enabled all the time the driver does any access to DWC3 registers,
otherwise external abort happens. So far DWC3 hardware module worked with
samsung,exynos5250-dwusb3 compatible only by luck when built into kernel:
all DRD30 clocks were left enabled by bootloader and later kept enabled
by the DRD PHY driver. However, if one tried to use Exnos DWC3 driver as
a module or performed system suspend/resume cycle, external abort
happened. This patch finally fixes this issue.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/usb/dwc3.txt | 1 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/usb/exynos-usb.txt | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt index 3e4c38b806ac..636630fb92d7 100644 --- a/Documentation/devicetree/bindings/usb/dwc3.txt +++ b/Documentation/devicetree/bindings/usb/dwc3.txt @@ -19,6 +19,7 @@ Exception for clocks: "cavium,octeon-7130-usb-uctl" "qcom,dwc3" "samsung,exynos5250-dwusb3" + "samsung,exynos5433-dwusb3" "samsung,exynos7-dwusb3" "sprd,sc9860-dwc3" "st,stih407-dwc3" diff --git a/Documentation/devicetree/bindings/usb/exynos-usb.txt b/Documentation/devicetree/bindings/usb/exynos-usb.txt index c97374315049..b7111f43fa59 100644 --- a/Documentation/devicetree/bindings/usb/exynos-usb.txt +++ b/Documentation/devicetree/bindings/usb/exynos-usb.txt @@ -83,6 +83,8 @@ Required properties: - compatible: should be one of the following - "samsung,exynos5250-dwusb3": for USB 3.0 DWC3 controller on Exynos5250/5420. + "samsung,exynos5433-dwusb3": for USB 3.0 DWC3 controller on + Exynos5433. "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. |