linux-kernel - Re: [PATCH 08/10] serdev: add serdev_device_get

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Message-ID: <CAL_Jsq+6NCC35zBMhvNhXug2sYmBqBoJ20pgdREhvRPGzePNkw@mail.gmail.com>
Date:   Tue, 7 Mar 2017 10:03:37 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Sebastian Reichel <sre@...nel.org>
Cc:     Marcel Holtmann <marcel@...tmann.org>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Mark Rutland <mark.rutland@....com>,
        "open list:BLUETOOTH DRIVERS" <linux-bluetooth@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 08/10] serdev: add serdev_device_get_cts

On Sat, Mar 4, 2017 at 5:58 AM, Sebastian Reichel <sre@...nel.org> wrote:
> Add method to get current CTS line state.
>
> Signed-off-by: Sebastian Reichel <sre@...nel.org>
> ---
>  drivers/tty/serdev/core.c           | 11 +++++++++++
>  drivers/tty/serdev/serdev-ttyport.c | 15 +++++++++++++++
>  include/linux/serdev.h              |  6 ++++++
>  3 files changed, 32 insertions(+)
>
> diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
> index a63b74031e22..36eb3dfb1477 100644
> --- a/drivers/tty/serdev/core.c
> +++ b/drivers/tty/serdev/core.c
> @@ -184,6 +184,17 @@ void serdev_device_wait_until_sent(struct serdev_device *serdev, long timeout)
>  }
>  EXPORT_SYMBOL_GPL(serdev_device_wait_until_sent);
>
> +bool serdev_device_get_cts(struct serdev_device *serdev)

I wonder if this should just be the wait for cts in the core. I think
that would be the common use for reading the CTS state. IIRC, I saw
some other device needing the same thing.

Rob