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i.MX6QP Read/Write PCIe register issues by memtool on Yocto 3.14.38_beta

Question asked by charles huang on Dec 14, 2015
Latest reply on Dec 15, 2015 by Yuri Muhin

1. After PCIe PHY reference clock is disabled, then PCIe PHY reference clock is enabled.

   PCIE cannot enable.

 

20E_0004 GPR (IOMUXC_GPR1): BIT 16 (REF_SSP_EN):

0 --> PCIe PHY reference clock is disabled

1 --> PCIe PHY reference clock is enabled

step 1) /unit_tests/memtool 0x020e0004=0x48400005

step 2) /unit_tests/memtool 0x020e0004=0x48410005

 

2. Whether it is read or write PCIE_RC_LCSR2 (Link Control and Status 2 Register) register, system will crash.

PCIE_RC_LCSR2 register: 0x01ffc0a0

Write: /unit_tests/memtool 0x01ffc0a0=0x10102

 

Can you tell me how to solve this issue?

 

Thank you.

 

Best Regards,

Alex Cheng

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