linux-kernel - Re: [PATCH v2 1/2] phy: rockchip-inno-usb2: correct clk

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Message-ID: <ee7f7cd7-cd77-dfa9-5075-3cc08b1cd79e@rock-chips.com>
Date:   Tue, 15 Nov 2016 11:22:30 +0800
From:   wlf <wulf@...k-chips.com>
To:     Doug Anderson <dianders@...gle.com>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Heiko Stübner <heiko@...ech.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Wang <frank.wang@...k-chips.com>,
        黄涛 <huangtao@...k-chips.com>,
        Brian Norris <briannorris@...gle.com>,
        Guenter Roeck <groeck@...gle.com>
Subject: Re: [PATCH v2 1/2] phy: rockchip-inno-usb2: correct clk_ops callback

Hi Doug,

在 2016年11月15日 02:15, Doug Anderson 写道:
> William
>
> On Sun, Nov 13, 2016 at 11:01 PM, William Wu <wulf@...k-chips.com> wrote:
>> Since we needs to delay ~1ms to wait for 480MHz output clock
>> of USB2 PHY to become stable after turn on it, the delay time
>> is pretty long for something that's supposed to be "atomic"
>> like a clk_enable(). Consider that clk_enable() will disable
>> interrupt and that a 1ms interrupt latency is not sensible.
>>
>> The 480MHz output clock should be handled in prepare callbacks
>> which support gate a clk if the operation may sleep.
>>
>> Signed-off-by: William Wu <wulf@...k-chips.com>
>> ---
>>   drivers/phy/phy-rockchip-inno-usb2.c | 12 ++++++------
>>   1 file changed, 6 insertions(+), 6 deletions(-)
> Reviewed-by: Douglas Anderson <dianders@...omium.org>

Thanks! I'll add  Reviewed-by.
>
>
>