Hi Alan,
On Tue, Aug 5, 2014 at 7:41 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> 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?
I have posted a patch-series [1] which cleans up the entire samsug
usb2 phy from older usb-phy
layer, and further removes the support for these older usb-phy from
ehci-exynos and ohci-exynos.
Please let me know your comments.
[1]: [PATCH 0/7] usb-phy: samsung: Cleanup the unused drivers
--
Best Regards
Vivek Gautam
Samsung R&D Institute, Bangalore
India
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