linux-kernel - Re: [PATCH v2 0/5] platform/x86: int3472: don't use gpiod_toggle_active

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Date:   Wed, 4 Oct 2023 18:29:59 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Daniel Scally <djrscally@...il.com>,
        Mark Gross <markgross@...nel.org>, linux-gpio@...r.kernel.org,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v2 0/5] platform/x86: int3472: don't use
 gpiod_toggle_active_low()

Hi Bart,

On 9/28/23 20:40, Bartosz Golaszewski wrote:
> On Thu, 28 Sept 2023 at 14:40, Hans de Goede <hdegoede@...hat.com> wrote:
>>
>> Hi All,
>>
>> Here is a v2 of Bartosz' "don't use gpiod_toggle_active_low()" series.
>>
>> New in v2:
>> - Rework to deal with ACPI path vs gpiod_lookup.key differences:
>>   acpi_get_handle(path) -> acpi_fetch_acpi_dev(handle) -> acpi_dev_name(adev)
>>
>> Regards,
>>
>> Hans
>>
>>
>> Bartosz Golaszewski (2):
>>   platform/x86: int3472: Add new
>>     skl_int3472_gpiod_get_from_temp_lookup() helper
>>   gpio: acpi: remove acpi_get_and_request_gpiod()
>>
>> Hans de Goede (3):
>>   platform/x86: int3472: Add new skl_int3472_fill_gpiod_lookup() helper
>>   platform/x86: int3472: Stop using gpiod_toggle_active_low()
>>   platform/x86: int3472: Switch to devm_get_gpiod()
>>
>>  drivers/gpio/gpiolib-acpi.c                   |  28 -----
>>  .../x86/intel/int3472/clk_and_regulator.c     |  54 ++--------
>>  drivers/platform/x86/intel/int3472/common.h   |   7 +-
>>  drivers/platform/x86/intel/int3472/discrete.c | 101 ++++++++++++++----
>>  drivers/platform/x86/intel/int3472/led.c      |  24 +----
>>  include/linux/gpio/consumer.h                 |   8 --
>>  6 files changed, 93 insertions(+), 129 deletions(-)
>>
>> --
>> 2.41.0
>>
> 
> Thanks Hans, this looks good to me. I'd let it sit on the list for a
> week. After that, do you want to take patches 1-4 and provide me with
> another tag?

I have just send out a v3 to address Andy's remark about me
somehow resetting the authorship to me on 2 patches from Bartosz.

While working on this I noticed (and fixed) a bug in:

[RFT PATCH 1/4] platform/x86: int3472: provide a helper for getting GPIOs from lookups
https://lore.kernel.org/all/20230926145943.42814-2-brgl@bgdev.pl/

	struct gpiod_lookup_table *lookup __free(kfree) =
			kzalloc(struct_size(lookup, table, 1), GFP_KERNEL);

You are allocating an entry for the temp lookup, but the gpiolib
core expects lookup tables to be terminated with an entry lookup,
so this should alloc space for 2 entries:

	struct gpiod_lookup_table *lookup __free(kfree) =
			kzalloc(struct_size(lookup, table, 2), GFP_KERNEL);

Despite this already being fixed now I wanted to explicitly point
this out in case you have used the same construct elsewhere during
your recent gpiolib cleanup efforts ?

As for your request for a tag for the 4st 4 patches for you to merge
into gpiolib. I'll go and work work on that. I need to coordinate
this with Ilpo, with whom I now co-maintain pdx86 .

Regards,

Hans