Hello.
On 10/31/2014 4:26 PM, Vivek Gautam wrote:
The host controller by itself may sometimes need to handle PHY
and re-initialize it to re-configure some of the PHY parameters
to get full support out of the PHY controller.
Therefore, facilitate getting the two possible PHYs, viz.
USB 2.0 type (UTMI+) and USB 3.0 type (PIPE3), and initialize them.
Signed-off-by: Vivek Gautam <gautam.vi...@samsung.com>
---
drivers/usb/host/xhci-plat.c | 74 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 3d78b0c..5207d5b 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
[...]
@@ -129,10 +130,41 @@ static int xhci_plat_probe(struct platform_device *pdev)
goto put_hcd;
}
+ /* Get possile USB 2.0 type PHY (UTMI+) available with xhci */
+ hcd->phy = devm_phy_get(&pdev->dev, "usb2-phy");
+ if (IS_ERR(hcd->phy)) {
+ ret = PTR_ERR(hcd->phy);
+ if (ret == -EPROBE_DEFER) {
+ goto disable_clk;
+ } else if (ret != -ENOSYS && ret != -ENODEV) {
Asking to be a *switch* statement instead...
+ hcd->phy = NULL;
+ dev_warn(&pdev->dev,
+ "Error retrieving usb2 phy: %d\n", ret);
+ }
+ }
+
[...]
@@ -158,12 +190,41 @@ static int xhci_plat_probe(struct platform_device *pdev)
if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
xhci->shared_hcd->can_do_streams = 1;
+ /* Get possile USB 3.0 type PHY (PIPE3) available with xhci */
+ xhci->shared_hcd->phy = devm_phy_get(&pdev->dev, "usb3-phy");
+ if (IS_ERR(xhci->shared_hcd->phy)) {
+ ret = PTR_ERR(xhci->shared_hcd->phy);
+ if (ret == -EPROBE_DEFER) {
+ goto put_usb3_hcd;
+ } else if (ret != -ENOSYS && ret != -ENODEV) {
Likewise...
+ xhci->shared_hcd->phy = NULL;
+ dev_warn(&pdev->dev,
+ "Error retrieving usb3 phy: %d\n", ret);
+ }
+ }
+
[...]
@@ -204,6 +271,8 @@ static int xhci_plat_suspend(struct device *dev)
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ phy_exit(hcd->phy);
Hm, in the suspend() method?
+
return xhci_suspend(xhci);
}
[...]
WBR, Sergei
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