On Mon, Jul 14, 2014 at 5:49 AM, Vivek Gautam <gautam.vivek@xxxxxxxxxxx> wrote:
> The host controller by itself may sometimes need to handle PHY
> and/or calibrate some of the PHY settings to get full support out
> of the PHY controller. The PHY core provides a calibration
> funtionality now to do so.
> Therefore, facilitate getting the two possible PHYs, viz.
> USB 2.0 type (UTMI+) and USB 3.0 type (PIPE3).
>
> Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
> ---
> drivers/usb/host/xhci-plat.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
> index 1a0cf9f..d097d60 100644
> --- a/drivers/usb/host/xhci-plat.c
> +++ b/drivers/usb/host/xhci-plat.c
> @@ -16,6 +16,7 @@
> #include <linux/module.h>
> #include <linux/of.h>
> #include <linux/platform_device.h>
> +#include <linux/phy/phy.h>
> #include <linux/slab.h>
> #include <linux/usb/xhci_pdriver.h>
>
> @@ -180,6 +181,14 @@ static int xhci_plat_probe(struct platform_device *pdev)
> goto put_hcd;
> }
>
> + /* Get possile USB 2.0 type PHY (UTMI+) available with xhci */
> + hcd->gen_phy = devm_phy_get(&pdev->dev, "usb2-phy");
> + if (IS_ERR(hcd->gen_phy)) {
> + ret = PTR_ERR(hcd->gen_phy);
> + if (ret != -ENOSYS && ret != -ENODEV)
> + dev_dbg(&pdev->dev, "no usb2 phy configured\n");
nit: This message is not really accurate anymore, right? If there is
no phy configured, you get ENODEV and (correctly) skip the message
completely. What you probably want is dev_warn(..., "error retrieving
usb2 phy: %d\n"); or something like that.
> + }
> +
> ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
> if (ret)
> goto disable_clk;
> @@ -209,6 +218,14 @@ 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->gen_phy = devm_phy_get(&pdev->dev, "usb3-phy");
> + if (IS_ERR(xhci->shared_hcd->gen_phy)) {
> + ret = PTR_ERR(xhci->shared_hcd->gen_phy);
> + if (ret != -ENOSYS && ret != -ENODEV)
> + dev_dbg(&pdev->dev, "no usb3 phy configured\n");
> + }
> +
> ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
> if (ret)
> goto put_usb3_hcd;
> --
> 1.7.10.4
>
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