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From: Roger Quadros <rogerq@ti.com>
To: Felipe Balbi <balbi@kernel.org>,
	Chunfeng Yun <chunfeng.yun@mediatek.com>
Cc: <robh+dt@kernel.org>, <vigneshr@ti.com>,
	<linux-usb@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/3] usb: dwc3: keystone: Turn on USB3 PHY before controller
Date: Mon, 25 May 2020 09:41:24 +0300	[thread overview]
Message-ID: <ec6c01d7-643f-3dd4-dcad-b492924fdf66@ti.com> (raw)
In-Reply-To: <debe1c1d-8e84-8047-d387-42d4f6e03f91@ti.com>



On 25/05/2020 09:39, Roger Quadros wrote:
> Felipe,
> 
> On 14/05/2020 13:21, Felipe Balbi wrote:
>> Roger Quadros <rogerq@ti.com> writes:
>>
>>> On 14/05/2020 04:37, Chunfeng Yun wrote:
>>>> On Wed, 2020-05-13 at 16:07 +0300, Roger Quadros wrote:
>>>>> The Local Power Sleep Controller (LPSC) dependency on AM65
>>>>> requires SERDES0 to be powered on before USB.
>>>>>
>>>>> We need to power up SERDES0 power domain and hold it on
>>>>> throughout the reset, init, power on sequence.
>>>>>
>>>>> Signed-off-by: Roger Quadros <rogerq@ti.com>
>>>>> ---
>>>>>    drivers/usb/dwc3/dwc3-keystone.c | 47 +++++++++++++++++++++++++++++++-
>>>>>    1 file changed, 46 insertions(+), 1 deletion(-)
>>>>>
>>>>> diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c
>>>>> index 1e14a6f4884b..46d46f3507fc 100644
>>>>> --- a/drivers/usb/dwc3/dwc3-keystone.c
>>>>> +++ b/drivers/usb/dwc3/dwc3-keystone.c
>>>>> @@ -14,6 +14,7 @@
>>>>>    #include <linux/dma-mapping.h>
>>>>>    #include <linux/io.h>
>>>>>    #include <linux/of_platform.h>
>>>>> +#include <linux/phy/phy.h>
>>>>>    #include <linux/pm_runtime.h>
>>>>>    /* USBSS register offsets */
>>>>> @@ -34,6 +35,7 @@
>>>>>    struct dwc3_keystone {
>>>>>        struct device            *dev;
>>>>>        void __iomem            *usbss;
>>>>> +    struct phy            *usb3_phy;
>>>>>    };
>>>>>    static inline u32 kdwc3_readl(void __iomem *base, u32 offset)
>>>>> @@ -95,8 +97,44 @@ static int kdwc3_probe(struct platform_device *pdev)
>>>>>        if (IS_ERR(kdwc->usbss))
>>>>>            return PTR_ERR(kdwc->usbss);
>>>>> -    pm_runtime_enable(kdwc->dev);
>>>>> +    /* PSC dependency on AM65 needs SERDES0 to be powered before USB0 */
>>>>> +    kdwc->usb3_phy = devm_phy_get(dev, "usb3-phy");
>>>> Use devm_phy_optional_get() instead?
>>>
>>> Indeed, it seems better suited.
>>
>> patches 1 and 2 are in testing/next
>>
> 
> Could you please drop them as I need to make changes to make the PHY optional.
> I will send v2 of entire series.

Actually only patch 2 and 3 need to be revised. Patch 1 is fine.

cheers,
-roger
-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

      reply	other threads:[~2020-05-25  6:41 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-13 13:07 [PATCH 0/3] usb: dwc3: keystone: Convert binding to YAML Roger Quadros
2020-05-13 13:07 ` [PATCH 1/3] dt-bindings: usb: convert keystone-usb.txt " Roger Quadros
2020-05-27  1:37   ` Rob Herring
2020-06-02 12:36     ` Roger Quadros
2020-05-13 13:07 ` [PATCH 2/3] dt-bindings: usb: ti,keystone-dwc3.yaml: Add USB3.0 PHY property Roger Quadros
2020-05-13 13:07 ` [PATCH 3/3] usb: dwc3: keystone: Turn on USB3 PHY before controller Roger Quadros
2020-05-14  1:37   ` Chunfeng Yun
2020-05-14  7:40     ` Roger Quadros
2020-05-14 10:21       ` Felipe Balbi
2020-05-25  6:39         ` Roger Quadros
2020-05-25  6:41           ` Roger Quadros [this message]

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