[PATCH v1] clk: imx95-blk-ctl: Add func_out_en clock for i.MX9x PCIe

[Peng Fan]

> Subject: [PATCH v1] clk: imx95-blk-ctl: Add func_out_en clock for
> i.MX9x PCIe
> 
> When internal PLL clock is used as PCIe REF clock, the BIT6(CREF_EN)
> and
> BIT2(FUNC_OUTPUT_EN) control the PCIE_REF_OUT_CLK.
> 
> If the default value of BIT6(CREF_EN)&BIT2(FUNC_OUTPUT_EN) is 1b'1.
> With the typical 100-ohm termination on the board, this results in
> approximately 6mA of power consumption.
> 
> When PCIe internal PLL clock is not enabled, these two bits should be
> cleared to 1b'0 to eliminate this power consumption.
> 
> Add a func_out_en clock for i.MX9x PCIe to serve as the parent gate
> clock of the CREF_EN (BIT6) gate clock. Both of these two gate clocks
> enable the output of the internal 100MHz differential reference clock.
> 
> Signed-off-by: Richard Zhu <hongxing.zhu at nxp.com>

Reviewed-by: Peng Fan <peng.fan at nxp.com>