Hi Folks,
Embarrassing ...
There was a small build of 5. There was an hw change afterwarts regardging CS. Reworked 4/5. I got the one without rework but special "local" working test software.
I wonder why switching to master is not working ...
Sorry for your time lapse.
BR
Niels
Marc Kleine-Budde schrieb am 31.01.2022 15:17 (GMT +00:00):
> On 31.01.2022 15:15:03, petter@xxxxxxxxxx wrote:
>>
>> Hi Marc,
>>
>> CS = High (de-asserted, slave not selected)
>> CS = low (asserted, slave selected)
>>
>> I also did not like the 0/1 starting point, but it is defined here:
>>
>> aliases {
>> gpio0 = &gpio1;
>> gpio1 = &gpio2;
>> gpio2 = &gpio3;
>> ...
>>
>>
>>
>> &gpio1 3 = gpiochip0 = 0*32 + 3 = gpio3
>> &gpio5 1 = gpiochip4 = 4*32 + 1 = gpio129
>
> In your output of /sys/kernel/debug/gpio, gpiochip3 starts at 128:
>
>>> gpiochip3: GPIOs 128-159, parent: platform/30240000.gpio, 30240000.gpio:
>>> gpio-128 ( |cd ) in hi IRQ ACTIVE LOW
>>> gpio-129 ( |spi1 CS0 ) out hi ACTIVE LOW
>
> Here it looks like this:
>
> gpiochip4: GPIOs 128-159, parent: platform/20ac000.gpio, 20ac000.gpio:
> gpio-130 (EIM_A25 |user1 ) out lo ACTIVE LOW
> gpio-133 (GPIO5_05 )
> gpio-134 (GPIO5_06 |reset ) out lo
> gpio-135 (GPIO5_07 )
> gpio-136 (GPIO5_08 )
> gpio-137 (CSPI2_CS1 |spi1 CS1 ) out hi ACTIVE LOW
> gpio-138 (CSPI2_MOSI )
> gpio-139 (CSPI2_MISO )
> gpio-140 (CSPI2_CS0 |spi1 CS0 ) out hi ACTIVE LOW
> gpio-141 (CSPI2_CLK )
>
>> Interresting with ACTIVE HIGH / LOW. cat debug/gpio tells me "ACTIVE
>> LOW" but anyway I did not see CS toggle at all. Also tested "1" but
>> nothing changed.
>>
>> By the way, the old kernel is working with the new device tree.
>>
>> I did a make clean and make sure that I really use latest build
>> artefacts. Everything is okay. Still failure.
>>
>> Maybe there are problems when using "make imx_v7_defconfig" ...
>> possible conflicts between drivers because there are much changes
>> between 5.4 and 5.10 whats enabled and/or new by default ? Try to go
>> with a very small kernel.
>
> There shouldn't be any conflicts between drivers.
>
> regards,
> Marc
>
> --
> Pengutronix e.K. | Marc Kleine-Budde |
> Embedded Linux | https://www.pengutronix.de |
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>
