From: zhichang <zhichang.yuan02@gmail.com>
To: Arnd Bergmann <arnd@arndb.de>, linux-arm-kernel@lists.infradead.org
Cc: Zhichang Yuan <yuanzhichang@hisilicon.com>,
linuxarm@huawei.com, linux-kernel@vger.kernel.org,
lorenzo.pieralisi@arm.com, minyard@acm.org,
benh@kernel.crashing.org, gabriele.paoloni@huawei.com,
john.garry@huawei.com, liviu.dudau@arm.com,
zourongrong@gmail.com
Subject: Re: [PATCH V2 3/4] ARM64 LPC: support serial based on low-pin-count
Date: Thu, 8 Sep 2016 17:51:25 +0800 [thread overview]
Message-ID: <57D1349D.8070905@gmail.com> (raw)
In-Reply-To: <5345060.9D0B4ujt5e@wuerfel>
Hi, Arnd
On 2016年09月07日 22:50, Arnd Bergmann wrote:
> On Wednesday, September 7, 2016 9:33:52 PM CEST Zhichang Yuan wrote:
>> From: "zhichang.yuan" <yuanzhichang@hisilicon.com>
>>
>> On Hip06 platform, a 16550 compatible UART is connected to low-pin-count and
>> controlled through the LPC I/O cycles. This patch drives the UART port with
>> the specific serial in/out function pair based on the indirect-IO mechanism
>> introduced by Hip06 LPC driver.
>>
>> Signed-off-by: zhichang.yuan <yuanzhichang@hisilicon.com>
>
> Any reason this cannot just use the regular drivers/tty/serial/8250/8250_of.c
> driver?
I think two reasons for that:
1. 8250_of.c is only for devicetree, but we need to support ACPI device too;
2. It seems UPIO_PORT is not supported there.
Best,
Zhichang
>
> Arnd
>
next prev parent reply other threads:[~2016-09-08 9:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-07 13:33 [PATCH V2 0/4] ARM64 LPC: legacy ISA I/O support Zhichang Yuan
2016-09-07 13:33 ` [PATCH V2 1/4] ARM64 LPC: Indirect ISA port IO introduced Zhichang Yuan
2016-09-07 15:06 ` Arnd Bergmann
2016-09-08 7:45 ` zhichang.yuan
2016-09-08 13:23 ` Arnd Bergmann
2016-09-13 6:08 ` zhichang
2016-09-07 15:21 ` kbuild test robot
2016-09-07 13:33 ` [PATCH V2 2/4] ARM64 LPC: LPC driver implementation on Hip06 Zhichang Yuan
2016-09-07 15:27 ` Arnd Bergmann
2016-09-08 8:06 ` zhichang.yuan
2016-09-08 10:00 ` Arnd Bergmann
2016-09-13 6:31 ` zhichang
2016-09-14 12:34 ` Arnd Bergmann
2016-09-07 17:51 ` kbuild test robot
2016-09-07 13:33 ` [PATCH V2 3/4] ARM64 LPC: support serial based on low-pin-count Zhichang Yuan
2016-09-07 14:50 ` Arnd Bergmann
2016-09-08 9:51 ` zhichang [this message]
2016-09-08 9:58 ` Arnd Bergmann
2016-09-14 11:48 ` zhichang.yuan
2016-09-14 12:07 ` Arnd Bergmann
2016-09-07 13:33 ` [PATCH V2 4/4] ARM64 LPC: support earlycon for UART connected to LPC Zhichang Yuan
2016-09-07 14:52 ` Arnd Bergmann
2016-09-08 10:04 ` zhichang
2016-09-08 11:04 ` Arnd Bergmann
2016-09-14 11:26 ` zhichang
2016-09-14 12:36 ` Arnd Bergmann
2016-09-08 9:26 ` kbuild test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=57D1349D.8070905@gmail.com \
--to=zhichang.yuan02@gmail.com \
--cc=arnd@arndb.de \
--cc=benh@kernel.crashing.org \
--cc=gabriele.paoloni@huawei.com \
--cc=john.garry@huawei.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxarm@huawei.com \
--cc=liviu.dudau@arm.com \
--cc=lorenzo.pieralisi@arm.com \
--cc=minyard@acm.org \
--cc=yuanzhichang@hisilicon.com \
--cc=zourongrong@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).