[PATCH v7 06/15] gpio: find gpio base by ascend order

[Haojian Zhuang]

On 9 February 2013 21:45, Grant Likely <grant.likely at secretlab.ca> wrote:
> On Fri, 18 Jan 2013 15:31:10 +0800, Haojian Zhuang <haojian.zhuang at linaro.org> wrote:
>> gpiochip_find_base() always tries to find valid gpio with descend order.
>> It's inconvient if gpio information is passing from DTS. Now try to find
>> valid gpio with ascend order.
>
> Why is it more convenient? Just to make the numbers smaller? The reason
> it uses a descending search is to mimimize the possibility of collision
> with fixed GPIO numbers.
>
> g.
>

I tried to parse global gpio number dynamically from DT, so I also used
gpiochip_find_base() to seek gpio number. If it's descending order, all the
gpio number are not also descending order. It will be inconvenient for
linking it to SoC datasheet & schematic. Since changing it to ascending
order may break user space application, Linus NACKed.

Now I'm trying to use fixed gpio number from machine driver.

Regards
Haojian