On Sat, Jan 13, 2024 at 09:45:42PM +0100, Francesco Dolcini wrote:
On Sat, Jan 13, 2024 at 06:40:19PM +0000, Marcel Ziswiler wrote:
Hi Marek
Thanks, seems like a decent idea. I guess we just did not do it as those previous revisions were just samples but with this change can still be used much easier (e.g. without requiring manual intervention).
On Sat, 2024-01-13 at 19:33 +0100, Marek Vasut wrote:
The older i.MX8M Mini Verdin SoMs before rev. 1.1C came with 20 MHz SPI CAN controller oscillator, the newer SoMs use 40 MHz oscillator. Handle both by overriding the oscillator frequency just before booting the kernel.
Signed-off-by: Marek Vasut marex@denx.de
Cc: "NXP i.MX U-Boot Team" uboot-imx@nxp.com Cc: Fabio Estevam festevam@gmail.com Cc: Francesco Dolcini francesco.dolcini@toradex.com Cc: Marcel Ziswiler marcel.ziswiler@toradex.com Cc: Philippe Schenker philippe.schenker@toradex.com Cc: Stefano Babic sbabic@denx.de
Acked-by: Marcel Ziswiler marcel.ziswiler@toradex.com
Marcel, that patch is buggy.
The assembly version makes sense only for a specific major/minor hardware version.
So what you need to check if revision < 1.1C, while the code from Marek check just for the assembly version C.
And in the general case even my suggested test is not enough. We started having assembly version that are not linearly increasing since some time.
I am fine on finding a solution to dynamically handle the different oscillator frequency, but let's do it right.
I will reply Monday with some more details so we can have a working solution.
Francesco