topic UPM values update in PowerQUICC Processors

UPM values update

m_syed_ahmed — Wed, 09 Mar 2022 15:21:23 GMT

We are working on the MPC8248 custom board. We have different timing valued SRAM chips. How to update the timing values for UPM devices? How does the UPM values obtained?

Re: UPM values update

yipingwang — Mon, 28 Mar 2022 08:12:07 GMT

Please refer to "11.6.2 Programming the UPMs" in https://www.nxp.com.cn/docs/en/reference-manual/MPC8272RM.pdf.

Re: UPM values update

m_syed_ahmed — Wed, 20 Apr 2022 07:18:03 GMT

Is it possible to re-configure the UPM values at kernel level?

Re: UPM values update

yipingwang — Thu, 28 Apr 2022 08:09:54 GMT

Please refer to the following files in the BSP.

arch/powerpc/sysdev/fsl_upm.c

include/asm-powerpc/fsl_upm.h

Re: UPM values update

m_syed_ahmed — Thu, 28 Apr 2022 08:34:42 GMT

Am not able to find that file. Can you tell in which kernel version those files were available? Also, we are working on 2.6.20. Is it possible to port those files to this version?

Re: UPM values update

yipingwang — Fri, 29 Apr 2022 08:12:42 GMT

Please refer to the following.

./drivers/mtd/nand/fsl_upm.c

Re: UPM values update

m_syed_ahmed — Fri, 29 Apr 2022 08:24:12 GMT

My kernel 2.6.20 doesn't have that file too. But I found that in the latest kernels. Is it possible to port that file to 2.6.20?

Re: UPM values update

yipingwang — Fri, 06 May 2022 09:04:50 GMT

Please try to back port that driver file in your Linux Kernel.

Re: UPM values update

yipingwang — Fri, 06 May 2022 09:05:07 GMT

Please try to back port that driver file in your Linux Kernel.