On Thu, Sep 5, 2019 at 5:33 PM Ernest Zhang(WH) <ernest.zhang@xxxxxxxxxxxxxx> wrote: > Hi Daniel, > I suggestion that you set PCR(PCI Configuration Register) 0x308 bit4 to 1 before load module " sdhci_pci " then test again. > For support 1.8V eMMC chip better, I had submit some patches to Linux kernel. But these patches are only work when PCR 0x308 bit4 is 1. Writes to this register seem to be ignored. I tried 8 bit, 16 bit and 32 bit access, using the setpci command, and I wasn't able to change any of the bits. The 32 bit value at this address has value 0x01000800 and as it seems to be read-only I'm unable to follow your suggestion. Daniel
