linux-kernel - Re: [PATCH] serial: mctrl_gpio: Drop support for out1-gpios and out2-gpios

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Date:	Thu, 28 Apr 2016 10:35:42 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Richard Genoud <richard.genoud@...il.com>
Cc:	Geert Uytterhoeven <geert+renesas@...der.be>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.com>,
	Peter Hurley <peter@...leysoftware.com>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] serial: mctrl_gpio: Drop support for out1-gpios and out2-gpios

Hi Richard,

On Wed, Apr 27, 2016 at 10:20 AM, Richard Genoud
<richard.genoud@...il.com> wrote:
> 2016-04-22 17:10 GMT+02:00 Geert Uytterhoeven <geert+renesas@...der.be>:
>> The OUT1 and OUT2 pins present on some legacy UARTs are basically GPIOs.
>> It doesn't make much sense to emulate GPIOs using other GPIOs, hence
>> drop support for that.
>>
>> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
>> ---
>>  drivers/tty/serial/serial_mctrl_gpio.c | 2 --
>>  1 file changed, 2 deletions(-)
>>
>> diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c
>> index 02147361eaa94747..821ffa637eb630cb 100644
>> --- a/drivers/tty/serial/serial_mctrl_gpio.c
>> +++ b/drivers/tty/serial/serial_mctrl_gpio.c
>> @@ -43,8 +43,6 @@ static const struct {
>>         { "rng", TIOCM_RNG, false, },
>>         { "rts", TIOCM_RTS, true, },
>>         { "dtr", TIOCM_DTR, true, },
>> -       { "out1", TIOCM_OUT1, true, },
>> -       { "out2", TIOCM_OUT2, true, },
>>  };
>>
>>  void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl)
>> --
>> 1.9.1
>>
> Maybe I missed something, but I think you want to remove
> UART_GPIO_OUT{1,2} also :
> diff --git a/drivers/tty/serial/serial_mctrl_gpio.h
> b/drivers/tty/serial/serial_mctrl_gpio.h
> index 9716db283290..10632e72b89f 100644
> --- a/drivers/tty/serial/serial_mctrl_gpio.h
> +++ b/drivers/tty/serial/serial_mctrl_gpio.h
> @@ -32,8 +32,6 @@ enum mctrl_gpio_idx {
>      UART_GPIO_RI = UART_GPIO_RNG,
>      UART_GPIO_RTS,
>      UART_GPIO_DTR,
> -    UART_GPIO_OUT1,
> -    UART_GPIO_OUT2,
>      UART_GPIO_MAX,
>  };

Thanks!

Doh, I knew one day these seemingly unused enum values would get out of sync
wr.t. the code. Will fix in v2...

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds