IMX8MM PCIE CLK OUT

[story]

Hello，

we are using imx8mm chip, bsp 5.4.3.

we need to use pcie to output 100mhhz clk, we see that evk all use other ic output, is there any related patch provided, I saw the forum by related posts, also The register test corresponding to the parameter setting, the unit cannot output clk.

[Yuri]

@story 
Hello,

   please look at the following:

https://community.nxp.com/t5/i-MX-Processors/imx8mm-pcie-ref-clock/m-p/994867

Regards,
Yuri.

[story]

Hi，

I refer to that and write the corresponding register, but clk has no output.

code:

/* Configure the PHY to output the refclock via pad */
writel(ANA_PLL_CLK_OUT_TO_EXT_IO_EN,
imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG061);
writel(ANA_PLL_CLK_OUT_TO_EXT_IO_SEL,
imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG062);
writel(AUX_PLL_REFCLK_SEL_SYS_PLL,
imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG063);
value = ANA_AUX_RX_TX_SEL_TX | ANA_AUX_TX_TERM;
writel(value | ANA_AUX_RX_TERM_GND_EN,
imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG064);
writel(ANA_AUX_RX_TERM | ANA_AUX_TX_LVL,
imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG065);