imx9_clockconfig: Add way to change and ask for PLL frequency #12229
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The frequency LUT idea is not necessary as the PLL output can be calculated by the CPU. It is better to do this as the clocks are set by the SPL (2nd stage program loader) which means the NuttX payload would not have access to such a LUT anyhow. The mask PLL_DIV_RDIV_MASK is also fixed, as that was simply wrong. Also add call to imx9_clockconfig (although it does not do anything yet).
xiaoxiang781216
approved these changes
Apr 24, 2024
acassis
approved these changes
Apr 24, 2024
This patch adds a way to configure PLL frequencies. The configuration is given by board logic. These values should only be modified by the bootloader, but we don't have that yet so the flag is never activated.
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Summary
This set of patches adds two things for iMX9:
The frequencies should be set during bootup, it is the responsibility of the second stage program loader (bootloader) to do this.
For most peripherals it is also important to know the root clock frequency, in order to calculate data rate for the peripheral.
Impact
Adds PLL support for iMX9
Testing
imx93-evk:nsh