imx8m: composite clock wrong clock parent ?

[Fabio Estevam]

Hi Sébastien,

On Mon, Feb 17, 2020 at 6:57 AM Sébastien Szymanski
<sebastien.szymanski at armadeus.com> wrote:
>
> Hi,
>
> I am working on a i.MX8MM based board and I got issue to make the
> Ethernet phy work.
> I noticed that the MDIO clock is not configured properly and the FEC
> outputs a 26,6MHz MDIO clock.
> That's because the clk_get_rate() call at line  1389 returns 24MHz
> whereas it should returns 266MHz as it is set in the device tree and
> configured in the SoC:
>
> BIOS> md.l 0x30388880 1
> 30388880: 11000000
>
> With some debug traces we can see that the enet_axi's parent is wrong:
>
> fecmxc_probe 1388
> clk_get_rate 447: clk clock-controller at 30380000
> clk_get_rate 447: clk enet1_root_clk
> clk_get_rate 447: clk enet_axi
> clk_get_parent_rate 489: clk enet_axi parent clock-osc-24m
> clk_get_parent_rate 489: clk enet1_root_clk parent enet_axi
> fecmxc_probe 1390
>
> Is this a known issue ?

It seems someone needs to work on a drivers/clk/imx/clk-imx8mq.c driver.

Regards,

Fabio Estevam