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by vianpl
Tue Apr 09, 2019 4:01 pm
Forum: Advanced users
Topic: Changing CPU & CORE frequencies
Replies: 1
Views: 158

Changing CPU & CORE frequencies

Hi all, I'm looking at implementing cpufreq support for mainline Linux and was wondering to what extent it would be possible to change both CPU and CORE (also named VPU) clocks directly through the register interface as opposed to the firmware one. And if so, whether any special step is needed durin...
by vianpl
Thu Nov 29, 2018 7:30 pm
Forum: Official Foundation Display
Topic: Display's interrupt pin question
Replies: 5
Views: 1836

Re: Display's interrupt pin question

Thanks both for your replies. 6by9, I adapted and applied your patches, all is good, the touchscreen now works trough I2C0 "cleanly". That said, I get from your conversation with Gordon that there is always a chance for the firmware to access the I2C0 for camera related purposes. That pretty much in...
by vianpl
Thu Nov 29, 2018 9:48 am
Forum: Official Foundation Display
Topic: Display's interrupt pin question
Replies: 5
Views: 1836

Display's interrupt pin question

Hi, I've been working on getting the touchscreen to work with mainline Linux. I used "disable_touchscreen=1" and modified the relevant upstream driver poll the touchscreen directly trough I2C. Seems to work fine :). One thing I can't seem to achieve is to get interrupts from the int pin on the displ...

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