[PATCH 3/4] [v6] pinctrl: qcom: disable GPIO groups with no pins

[Timur Tabi]

On 11/17/2017 11:46 AM, Stephen Boyd wrote:
> On 11/16, Timur Tabi wrote:
>> On 11/16/17 8:43 PM, Stephen Boyd wrote:
>>>> Most access to unavailable GPIOs can be blocked via the gpio_chip.request
>>>> function.  The one exception is when gpiochip_add_data() scans all of
>>
>>> If patch 1 is applied is this statement still true?
>>
>> Nope.
>>
> 
> Ok. So what's the point of this patch then? Put another way, is
> there some path that doesn't request the gpio still even with
> patch 1 applied?

This patch is how the pinctrl-msm driver actually reports the sparse 
GPIO map.

Patch 1 prevents gpiolib from accessing GPIOs that haven't been properly 
requested.

Patch 2 adds an infrastructure for sparse GPIO maps

Patch 3 updates pinctrl-msm to use that expose that new infrastructure

Patch 4 updates pinctrl-qdf2xxx to work with the new feature in pinctrl-msm


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