Re: [PATCH v7 1/2] usb: host: xhci-plat: Get PHYs for xhci's hcds

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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.vivek@xxxxxxxxxxx>
---
  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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