[PATCH RFC 0/2] pinctrl: bcm2835: Implement pin_conf_get

[Stefan Wahren]

Hi Florian,

Am 27.02.24 um 01:22 schrieb Florian Fainelli:
> On 2/25/24 02:01, Stefan Wahren wrote:
>> Hi Florian,
>>
>> Am 07.02.24 um 19:22 schrieb Florian Fainelli:
>>> On 2/7/24 03:33, Stefan Wahren wrote:
>>>> Hi Linus,
>>>>
>>>> Am 07.02.24 um 11:56 schrieb Linus Walleij:
>>>>> On Sun, Feb 4, 2024 at 5:59 PM Stefan Wahren <wahrenst at gmx.net>
>>>>> wrote:
>>>>>
>>>>>> For years, the Raspberry Pi users relied on userspace programs to
>>>>>> read
>>>>>> the pin configuration. In the meantime, it has become apparent that
>>>>>> this
>>>>>> approach has reached its limits for various reasons.
>>>>>>
>>>>>> This patch series now attempts to improve the debugging
>>>>>> possibilities on
>>>>>> the kernel side in order to reduce the dependency on these userspace
>>>>>> programs.
>>>>>>
>>>>>> Stefan Wahren (2):
>>>>>>    pinctrl: bcm2835: Implement bcm2835_pinconf_get
>>>>>>    pinctrl: bcm2835: Implement bcm2711_pinconf_get
>>>>> I don't see any problems with this, can I just apply the patches or
>>>>> do you
>>>>> want to first resend them as non-RFC?
>>>> since the second patch hasn't been tested with BCM7211, it would be
>>>> nice
>>>> to get a feedback from Florian or someone else with this hardware?
>>>
>>> Give me a few days to get there and I will run a test.
>>
>> is there any chance to test with BCM7211?
>
> Sorry about the delay, I just gave those patches a try although I am
> not sure where I should be seeing the reporting about being configured
> as pull up/down? Is this supposed to be visible under
> /sys/kernel/debug/pinctrl/*.gpio-pinctrl-bcm2711/pins?
It should be .../pinconf-pins
>
> Checking the datasheet for 2711/7211 we advertise 50kOhms internal
> pull ups/downs for all GPIO pins, so we might need to make the
> resistor value different based upon the board/SoC maybe.
Thanks for this, in this case i would change the resistor values to
50000 Ohms. The CM4 datasheet actually provide a range.

Regards