Re: [PATCH v2] Input: silead - Do not try to directly access the GPIO when using ACPI pm

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Hi,

On 07-03-17 14:55, Hans de Goede wrote:
Hi,

<more snip>

Ok, since it seems clear that I'm not going to be able to change your
mind on this, I will give your patches a try and see if they fix the
silead ts problems.

So I've cherry picked all the gpio related patches from your topic/uart/rpm
branch into my wip branch and then ran some tests. I did not get around
to actually test if the fix the silead issue (I believe they will) as I
started testing on a cht device and looking if soc_button_array still
works with your patches applied.

Unfortunately it no longer works, there are 2 problems:

1) "Input: soc_button_array - Add GPIO ACPI mapping table" should
also replace:

	desc = gpiod_get_index(dev, info->name, info->acpi_index, GPIOD_ASIS);

with:

	desc = gpiod_get(dev, info->name, GPIOD_ASIS);

At which point we can also drop the acpi_index field from the buttoninfo struct
altogether.

I think that "extcon: int3496: Add GPIO ACPI mapping table" will need
a similar change (I haven't tested it yet).

2) acpi_gpio_count() does not seem to work right in combination with the
new patches. It returns -ENOENT rather then the number of gpios specified
in the table passed to devm_acpi_dev_add_driver_gpios. It seems to only
check for gpios actually in the acpi-properties without looking at
adev->driver_gpios, where as acpi_can_fallback_to_crs() does check for
that and disallows fallback to counting the gpios in the _CRS causing
acpi_gpio_count() to not find any gpios. I believe the right fix for
this is to make acpi_gpio_count() also count the number of entries
in the adev->driver_gpios table.

For now I've just removed the acpi_gpio_count() check from soc_button_array,
with that removed and 1) fixed soc_button_array does work.

I will try to do some more testing later today, but all my cht work is
a side project and I first need to finish some stuff for my actual
main $dayjob project.

Regards,

Hans
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