From: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
To: Sascha Silbe <x-linux@infra-silbe.de>
Cc: Johan Hovold <jhovold@gmail.com>,
Linus Walleij <linus.walleij@linaro.org>,
Alexandre Courbot <gnurou@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-gpio@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] USB: ftdi_sio: add GPIO support
Date: Mon, 9 Jun 2014 15:23:13 +0100 [thread overview]
Message-ID: <20140609152313.45f353d6@alan.etchedpixels.co.uk> (raw)
In-Reply-To: <1402320115-13171-1-git-send-email-x-linux@infra-silbe.de>
> #include <linux/kernel.h>
> #include <linux/errno.h>
> +#ifdef CONFIG_GPIOLIB
> +#include <linux/gpio.h>
> +#endif
Please create a new struct, a new file and put all the GPIO stuff in
there rather than #if bombing the driver.
You can then declare blank methods for the gpio stuff if GPIO is not
compiled in - ie in the headers
#ifdef CONFIG_GPIOLIB
extern int ftdi_gpio_open(struct ftdi_private *priv);
etc...
#else
extern inline int ftdi_gpio_open(struct ftdi_private *priv) { return 0 };
#endif
that keeps the code itself clean and easy to read and also ensures all
the types are checked everywhere we want.
Functionality wise nothing stands out as a problem. I would expect -EBUSY
not -ENXIO if the port was being used for GPIO so could not be used for
tty.
I would favour the new config option.
Alan
next prev parent reply other threads:[~2014-06-09 14:23 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-09 13:21 [PATCH] USB: ftdi_sio: add GPIO support Sascha Silbe
2014-06-09 14:23 ` One Thousand Gnomes [this message]
2014-06-09 18:36 ` Sergei Shtylyov
2014-06-10 10:56 ` Johan Hovold
2014-06-16 7:15 ` Philipp Hachtmann
2014-06-13 7:25 ` Linus Walleij
2014-06-13 18:31 ` Greg Kroah-Hartman
2014-07-07 10:44 ` Linus Walleij
2014-07-07 17:31 ` Greg Kroah-Hartman
[not found] ` <20140707173142.GB8693-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-05-30 20:29 ` Grant Likely
[not found] ` <CACxGe6uskWcBU0MhO=EupU=2VKmDhX01-_LDJ-n91XAnRYiqbw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-02 13:18 ` Linus Walleij
[not found] ` <CACRpkdbDAWq42pkwTfi98invy0ov=XD8WzfX0dwnjeRXVpQ8Ow-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-07-03 22:13 ` Grant Likely
2015-07-16 11:56 ` Linus Walleij
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