linux-kernel - Re: [PATCH] platform/x86: dell-uart-backlight: new backlight driver for DELL AIO

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Message-ID: <CAHp75VdmavL0wEnrXhC+ocw+gt5nw_SCz2qm0pXW+0TCW00u6w@mail.gmail.com>
Date:   Fri, 27 Oct 2017 23:26:17 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     AceLan Kao <acelan.kao@...onical.com>
Cc:     Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>
Subject: Re: [PATCH] platform/x86: dell-uart-backlight: new backlight driver
 for DELL AIO

On Thu, Oct 26, 2017 at 10:53 AM, AceLan Kao <acelan.kao@...onical.com> wrote:
> The Dell AIO machines released after 2017 come with a UART interface
> to communicate with the backlight scalar board. This driver creates
> a standard backlight interface and talks to the scalar board through
> UART.
>
> In DSDT this uart port will be defined as
>    Name (_HID, "DELL0501")
>    Name (_CID, EisaId ("PNP0501")
> The 8250 PNP driver will be loaded by default, and this driver uses
> "DELL0501" to confirm the uart port is a backlight interface and
> leverages the port created by 8250 PNP driver to communicate with
> the scalar board.

So, I will wait for next version based on serdev approach and then
will give my comments if any.

-- 
With Best Regards,
Andy Shevchenko