From: Johan Hovold <johan@kernel.org>
To: Charles Yeh <charlesyeh522@gmail.com>
Cc: "Johan Hovold" <johan@kernel.org>,
"Greg KH" <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org,
"Yeh.Charles [葉榮鑫]" <charles-yeh@prolific.com.tw>
Subject: Re: [PATCH] [PATCH v7] USB: serial: pl2303: Add new PID to support PL2303HXN (TYPE_HXN)
Date: Wed, 25 Sep 2019 11:38:48 +0200 [thread overview]
Message-ID: <20190925093848.GE14159@localhost> (raw)
In-Reply-To: <CAAZvQQ5gJr_pTgA+XGyMfcf8Fakvg4zO3hcOcwufr7HOPn4DPQ@mail.gmail.com>
On Wed, Sep 25, 2019 at 05:36:23PM +0800, Charles Yeh wrote:
> Johan Hovold <johan@kernel.org> 於 2019年9月25日 週三 下午4:06寫道：
> > Meanwhile you can double check that you've considered all
> > review-feedback you've gotten so far.
> >
> > I don't think you ever replied to my last comment about the reset
> > register and why I thought using plain write (not read, mask, write) was
> > the right thing to do.
> >
> > Does the register always read back as 0, or does it read back as the
> > last value written?
>
> Charles Ans:
> I just asked my colleague, who is RD of design PL2303 hardware,
> His answer is to read 0 forever.
>
> Does the register always read back as 0, or does it read back as the
> last value written?
> Ans: Yes, the register"#define PL2303_HXN_RESET_REG 0x07" always
> read back as 0.
>
> I hope the above content has an answer to your question:
> If there are other questions, please try to raise it.. thanks
It does, thanks for confirming.
Johan
prev parent reply other threads:[~2019-09-25 9:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-02 12:30 [PATCH] [PATCH v7] USB: serial: pl2303: Add new PID to support PL2303HXN (TYPE_HXN) Charles Yeh
2019-07-05 2:57 ` Charles Yeh
2019-07-05 5:18 ` Greg KH
2019-07-16 8:49 ` Johan Hovold
2019-08-27 8:40 ` Charles Yeh
2019-09-18 5:46 ` Charles Yeh
2019-09-20 7:56 ` Johan Hovold
2019-09-23 9:53 ` Charles Yeh
2019-09-23 10:24 ` Johan Hovold
2019-09-23 10:35 ` Charles Yeh
2019-09-23 13:08 ` Johan Hovold
2019-09-25 1:20 ` Charles Yeh
2019-09-25 8:06 ` Johan Hovold
2019-09-25 9:36 ` Charles Yeh
2019-09-25 9:38 ` Johan Hovold [this message]
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