Re: [PATCH 3/6] gpio: add a userspace chardev ABI for GPIOs

[Bamvor Zhang Jian <bamvor.zhangjian@xxxxxxxxxx>]

Hi, Linus

On 01/28/2016 07:14 PM, Linus Walleij wrote:
> On Wed, Jan 27, 2016 at 11:05 AM, Bamvor Zhang Jian
> <bamvor.zhangjian@xxxxxxxxxx> wrote:
>
>> From the api(ioctl GPIO_GET_CHIPINFO_IOCTL: gpiochip_info), it seems
>> that I could list all the gpiochips or list only one gpiochip. But
>> I could not list gpiochip belongs to one gpio driver.
>
> I think you can get that information from parsing sysfs?
Yeap, I could get the directory:
"/sys/devices/platform/gpio-mockup/gpio/"

I notice that you mark the sysfs ABI as obsolete in these series. I
am not sure whether it is reasonable to read it from syfs when using
chardev.

Regars

Bamvor
>
> Yours,
> Linus Walleij
>
--
To unsubscribe from this list: send the line "unsubscribe linux-gpio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html