On 23/05/2014 11:28, Kishon Vijay Abraham I wrote:
> Hi,
>
> On Friday 16 May 2014 09:52 PM, Gregory CLEMENT wrote:
>> This commit extends the xhci-plat so that it can optionally be passed
>> a reference to a PHY through the Device Tree. It will be useful for
>> the Armada 375 SoCs. If no PHY is provided then the behavior of the
>> driver is unchanged.
>>
>> As for the clock, to achieve this, it adds a 'struct phy *' member in
>> xhci_hcd. While only used for now in xhci-plat, here again, it might
>> be used by other drivers in the future.
>>
>> Signed-off-by: Gregory CLEMENT <gregory.clem...@free-electrons.com>
>> ---
>> drivers/usb/host/xhci-plat.c | 29 ++++++++++++++++++++++++++++-
>> drivers/usb/host/xhci.h | 2 ++
>> 2 files changed, 30 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
>> index 0f5f4c8f5bf6..34239b582621 100644
>> --- a/drivers/usb/host/xhci-plat.c
>> +++ b/drivers/usb/host/xhci-plat.c
>> @@ -15,6 +15,7 @@
>> #include <linux/dma-mapping.h>
>> #include <linux/module.h>
>> #include <linux/of.h>
>> +#include <linux/phy/phy.h>
>> #include <linux/platform_device.h>
>> #include <linux/slab.h>
>>
>> @@ -94,6 +95,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
>> struct resource *res;
>> struct usb_hcd *hcd;
>> struct clk *clk;
>> + struct phy *phy;
>> int ret;
>> int irq;
>>
>> @@ -160,9 +162,23 @@ static int xhci_plat_probe(struct platform_device *pdev)
>> goto unmap_registers;
>> }
>>
>> + phy = devm_phy_optional_get(&pdev->dev, "usb");
>> + if (IS_ERR(phy)) {
>> + ret = PTR_ERR(phy);
>> + goto disable_clk;
>> + } else {
>> + ret = phy_init(phy);
>> + if (ret)
>> + goto disable_phy;
> s
> I think you meant disable_clk here?
yes indeed!
>> +
>> + ret = phy_power_on(phy);
>> + if (ret)
>> + goto disable_phy;
>> + }
>> +
>> ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
>> if (ret)
>> - goto disable_clk;
>> + goto power_off_phy;
>>
>> device_wakeup_enable(hcd->self.controller);
>>
>> @@ -198,6 +214,12 @@ put_usb3_hcd:
>> dealloc_usb2_hcd:
>> usb_remove_hcd(hcd);
>>
>> +power_off_phy:
>> + if (!IS_ERR(phy))
>
> This check is unnecessary here since you do power_off only if PHY is not
> error.
Good catch again!
>> + phy_power_off(phy);
>> +disable_phy:
>> + if (!IS_ERR(phy))
>
> same here..
I agree
>> + phy_exit(phy);
>> disable_clk:
>> if (!IS_ERR(clk))
>> clk_disable_unprepare(clk);
>> @@ -219,6 +241,7 @@ static int xhci_plat_remove(struct platform_device *dev)
>> struct usb_hcd *hcd = platform_get_drvdata(dev);
>> struct xhci_hcd *xhci = hcd_to_xhci(hcd);
>> struct clk *clk = xhci->clk;
>> + struct phy *phy = xhci->phy;
>>
>> usb_remove_hcd(xhci->shared_hcd);
>> usb_put_hcd(xhci->shared_hcd);
>> @@ -226,6 +249,10 @@ static int xhci_plat_remove(struct platform_device *dev)
>> usb_remove_hcd(hcd);
>> if (!IS_ERR(clk))
>> clk_disable_unprepare(clk);
>> + if (!IS_ERR(phy)) {
>
> same here..
I agree too
Thanks for you review,
Gregory
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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