Hi Marek,
On Fri, Apr 18, 2025 at 11:53 AM Marek Vasut <ma...@denx.de> wrote:
> The "clock-output-names" is NEVER used for any clock look up.
In Linux, "clock-output-names" is used to register the name of the
fixed-rate clock.
>From Linux drivers/clk/clk-fixed-rate.c:
```
static struct clk_hw *_of_fixed_clk_setup(struct device_node *node)
{
....
of_property_read_string(node, "clock-output-names", &clk_name);
hw = clk_hw_register_fixed_rate_with_accuracy(NULL, clk_name, NULL,
0, rate, accuracy);
```
In U-Boot, we should register a fixed-rate clock with the same name as in Linux.
This patch aims to make the U-Boot fixed-rate clock name conform to
Linux standards.
> I am fine with the first half of the description, but the second half is
> wrong and this actually does not fix anything. Simply remove
> clock-output-names from the osc_24m and the code will be broken again.
In Linux, if "clock-output-names" is removed from the osc_24m node,
the console becomes corrupted
on an imx8mp-evk.
> The clk_resolve_parent_clk() is meant to perform the aforementioned
> resolution(), that is what "[PATCH v2 00/24] clk: Add
> clk_resolve_parent_clk() and fix up iMX clock drivers" actually fixed.
> It seems there is something still missing and clk_resolve_parent_clk()
> does not do the resolution properly for some clock, but that is what
> needs to be understood and fixed, not worked around this way.
Please try to reproduce the problem on your end.
On an imx8mp-based board, run 'usb start' in U-Boot, and this command will fail.
Thanks
