linux-kernel - Re: [PATCH v3 07/12] phy: Add usb phy support for hi3660 Soc of Hisilicon

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Message-ID: <d17d12d1-0f72-9820-5f1d-bc29578e7a68@huawei.com>
Date:   Mon, 4 Mar 2019 10:37:20 +0800
From:   Chen Yu <chenyu56@...wei.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
CC:     <liuyu712@...ilicon.com>, USB <linux-usb@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        John Stultz <john.stultz@...aro.org>,
        Suzhuangluan <suzhuangluan@...ilicon.com>,
        Kongfei <kongfei@...ilicon.com>, <wanghu17@...ilicon.com>,
        <butao@...ilicon.com>, Yao Chen <chenyao11@...wei.com>,
        <fangshengzhou@...ilicon.com>, <lipengcheng8@...wei.com>,
        songxiaowei <songxiaowei@...ilicon.com>,
        xu yiping <xuyiping@...ilicon.com>, <xuyoujun4@...wei.com>,
        <yudongbin@...ilicon.com>, <zangleigang@...ilicon.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Arnd Bergmann" <arnd@...db.de>, Shawn Guo <shawnguo@...nel.org>,
        Pengcheng Li <lpc.li@...ilicon.com>,
        Jianguo Sun <sunjianguo1@...wei.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Jiancheng Xue <xuejiancheng@...ilicon.com>,
        Binghui Wang <wangbinghui@...ilicon.com>
Subject: Re: [PATCH v3 07/12] phy: Add usb phy support for hi3660 Soc of
 Hisilicon

Hi Andy,

On 2019/3/2 23:56, Andy Shevchenko wrote:
> On Sat, Mar 2, 2019 at 11:06 AM Yu Chen <chenyu56@...wei.com> wrote:
>>
>> This driver handles usb phy power on and shutdown for hi3660 Soc of
>> Hisilicon.
> 
> Few comments below. After fixing them, FWIW
> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
> 
>> +#define HI3660_USB_DEFAULT_PHY_PARAM           0x1c466e3
> 
> A bit of description would be nice to have what this value means.
> 
OK.
>> +       /* delay for exit from IDDQ mode */
>> +       usleep_range(100, 100);
> 
> 100,100 ? I think you need to give a room to scheduler, at least 20%
> margin would be good to have.
> 
>> +       /* delay for vbus valid */
>> +       usleep_range(100, 100);
> 
> Ditto.
> 
> 
OK.

Thanks
Yu Chen