On Tue, 5 Aug 2014, Vivek Gautam wrote:
> Since we want to keep support for both older usb-phys as well as the
> newer generic phys, lets first get the generic PHYs and fallback to
> older USB-PHYs only when we fail to get the former.
> This should fix the issue with ehci-exynos and ohci-exynos, wherein
> in the absence of SAMSUNG_USB2PHY config symbol, we end up getting
> the NOP_USB_XCEIV phy when the same is enabled. And thus the PHYs
> are not configured properly.
>
> Reported-by: Sachin Kamat <sachin.kamat@xxxxxxxxxxx>
> Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> Cc: Jingoo Han <jg1.han@xxxxxxxxxxx>
> ---
>
> Based on 'usb-next' branch.
> Resending it after adding 'Reported-by' tag.
>
> drivers/usb/host/ehci-exynos.c | 40 +++++++++++++++++-----------------
> drivers/usb/host/ohci-exynos.c | 47 +++++++++++++++++++---------------------
> 2 files changed, 42 insertions(+), 45 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
> index cda0a2f..2eed9a4 100644
> --- a/drivers/usb/host/ehci-exynos.c
> +++ b/drivers/usb/host/ehci-exynos.c
> @@ -62,18 +62,6 @@ static int exynos_ehci_get_phy(struct device *dev,
> int phy_number;
> int ret = 0;
>
> - exynos_ehci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
> - if (IS_ERR(exynos_ehci->phy)) {
> - ret = PTR_ERR(exynos_ehci->phy);
> - if (ret != -ENXIO && ret != -ENODEV) {
> - dev_err(dev, "no usb2 phy configured\n");
> - return ret;
> - }
> - dev_dbg(dev, "Failed to get usb2 phy\n");
> - } else {
> - exynos_ehci->otg = exynos_ehci->phy->otg;
> - }
> -
> for_each_available_child_of_node(dev->of_node, child) {
> ret = of_property_read_u32(child, "reg", &phy_number);
> if (ret) {
> @@ -90,15 +78,27 @@ static int exynos_ehci_get_phy(struct device *dev,
What about the code that you skipped here? Suppose the
of_property_read_32() call returns an error. Do you then want to abort
the whole thing, or should you go on to try the old usb_phy?
Alan Stern
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