Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Tue, 20 Nov 2018 18:29:43 +0100
From:   Johan Hovold <johan@kernel.org>
To:     "Ji-Ze Hong (Peter Hong)" <hpeter@gmail.com>
Cc:     johan@kernel.org, gregkh@linuxfoundation.org,
        linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
        peter_hong@fintek.com.tw,
        "Ji-Ze Hong (Peter Hong)" <hpeter+linux_kernel@gmail.com>
Subject: Re: [PATCH V1 1/1] USB: serial: f81534: fix reading old/new IC config
Message-ID: <20181120172943.GJ19900@localhost>
References: <1542250724-11667-1-git-send-email-hpeter+linux_kernel@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1542250724-11667-1-git-send-email-hpeter+linux_kernel@gmail.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Thu, Nov 15, 2018 at 10:58:44AM +0800, Ji-Ze Hong (Peter Hong) wrote:
> The F81532/534 had a internal configuration space to save & control
> IC state with address F81534_CUSTOM_ADDRESS_START (0x2f00). Layout
> as following:
> 	+00h: to indicate the section is valid
> 	+01h~04h: UART Mode & port availability
> 	+05h~08h: Output pin control on IC power on
> 	+09h~12h: Output pin control on working <-- New added
> 
> Old driver will use +05~08h as default on working, but newer IC will
> configed with shutdown mode(7) in 05h~08h and working mode with RS232(1)
> in 09h~12h. It'll make mainstream driver not working.
> 
> This patch will make mainstream driver compatible older and newer IC.
> If using a old IC, the +05h~08h will be 00h~06h, we'll direct apply it.
> If using a new IC, the +05h~08h will be 07h or larger, we'll read +09h~12h
> to apply newer configuration.
> 
> Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com>

Applied for -next. I guess you can ask Greg if he's willing to take this
into stable once 4.21-rc1 is out (as it is enabling support for a new
class of devices).

Thanks,
Johan