Hi Community,
On our Linux 3.x kernel, our PCIe bus works and outputs 125MHz on the CLK1_P and CLK1_N pins, which is what we want. When we migrated to the Linux 4.9 kernel, the PCIe bus works, but it outputs a 100MHz clock.
When we modified the clk-imx6q.c file to output the 125MHz clock, the clock was correct, but Linux hung during boot as shown below. Does anybody have any suggestions on how to set this configuration up in Linux 4.9?
---------- clk-imx6q.c change ------------
if (IS_ENABLED(CONFIG_PCI_IMX6)) {
//clk_set_parent(clk[IMX6QDL_CLK_LVDS1_SEL], clk[IMX6QDL_CLK_SATA_REF_100M]);
clk_set_parent(clk[IMX6QDL_CLK_LVDS1_SEL], clk[IMX6QDL_CLK_PCIE_REF_125M]);
---------- Linux 4.9 crash during boot -------------
...
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
OF: PCI: host bridge /soc/pcie@0x01000000 ranges:
OF: PCI: No bus range found for /soc/pcie@0x01000000, using [bus 00-ff]
OF: PCI: IO 0x01f80000..0x01f8ffff -> 0x00000000
OF: PCI: MEM 0x01000000..0x01efffff -> 0x01000000
Thank you,
Chris
