UPM values update

[m_syed_ahmed]

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?

[yipingwang]

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

[m_syed_ahmed]

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

[yipingwang]

Please refer to the following files in the BSP.

arch/powerpc/sysdev/fsl_upm.c

include/asm-powerpc/fsl_upm.h

[m_syed_ahmed]

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?

[yipingwang]

Please refer to the following.

./drivers/mtd/nand/fsl_upm.c

[m_syed_ahmed]

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?

[yipingwang]

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

[yipingwang]

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