linux-kernel - Re: [PATCH v3 1/8] iio: stx104: Implement get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAHp75Vci2sMWPC2Sij5WzNtSi_2b3f1PC5qn3-hiSf8xrCpcBQ@mail.gmail.com>
Date:   Sat, 17 Mar 2018 20:51:07 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     William Breathitt Gray <vilhelm.gray@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-iio@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>
Subject: Re: [PATCH v3 1/8] iio: stx104: Implement get_multiple callback

On Sat, Mar 17, 2018 at 5:49 PM, William Breathitt Gray
<vilhelm.gray@...il.com> wrote:
> The Apex Embedded Systems STX104 series of devices provides 4 TTL
> compatible lines of inputs accessed via a single 4-bit port. Since four
> input lines are acquired on a single port input read, the STX104 GPIO
> driver may improve multiple input reads by utilizing a get_multiple
> callback. This patch implements the stx104_gpio_get_multiple function
> which serves as the respective get_multiple callback.

> +static int stx104_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
> +       unsigned long *bits)
> +{
> +       struct stx104_gpio *const stx104gpio = gpiochip_get_data(chip);
> +

> +       *bits = inb(stx104gpio->base);

I think on LE and BE if will give you different results.

> +
> +       return 0;
> +}



-- 
With Best Regards,
Andy Shevchenko