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USB: ehci-msm: Add device tree support and binding information 

Allows MSM EHCI controller to be specified via device tree.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Acked-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ivan T. Ivanov 2013-10-11 14:46:10 +03:00 committed by Greg Kroah-Hartman
parent e4f0da055e
commit 0fc924bd4e
2 changed files with 30 additions and 2 deletions
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17
Documentation/devicetree/bindings/usb/msm-hsusb.txt Normal file
View File

@ -0,0 +1,17 @@
MSM SoC HSUSB controllers
EHCI
Required properties:
- compatible: Should contain "qcom,ehci-host"
- regs: offset and length of the register set in the memory map
- usb-phy: phandle for the PHY device
Example EHCI controller device node:
ehci: ehci@f9a55000 {
compatible = "qcom,ehci-host";
reg = <0xf9a55000 0x400>;
usb-phy = <&usb_otg>;
};

15
drivers/usb/host/ehci-msm.c
View File

@ -108,10 +108,14 @@ static int ehci_msm_probe(struct platform_device *pdev)
* powering up VBUS, mapping of registers address space and power
* management.
*/
phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
if (pdev->dev.of_node)
phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
else
phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
if (IS_ERR(phy)) {
dev_err(&pdev->dev, "unable to find transceiver\n");
ret = -ENODEV;
ret = -EPROBE_DEFER;
goto put_hcd;
}
@ -187,12 +191,19 @@ static const struct dev_pm_ops ehci_msm_dev_pm_ops = {
.resume = ehci_msm_pm_resume,
};
static struct of_device_id msm_ehci_dt_match[] = {
{ .compatible = "qcom,ehci-host", },
{}
};
MODULE_DEVICE_TABLE(of, msm_ehci_dt_match);
static struct platform_driver ehci_msm_driver = {
.probe = ehci_msm_probe,
.remove = ehci_msm_remove,
.driver = {
.name = "msm_hsusb_host",
.pm = &ehci_msm_dev_pm_ops,
.of_match_table = msm_ehci_dt_match,
},
};