Re: [RFT net-next v4 3/5] net: stmmac: dwmac-meson8b: fix internal RGMII clock configuration

On Mon, 2018-01-15 at 13:08 +0100, Martin Blumenstingl wrote:

can you share your thoughts how to do this?
I can devm_kzalloc the memory for struct clk_mux, clk_divider and
clk_fixed_factor in the function which registers these clocks. but I
cannot declare them on the stack, because the clk-* implementations
still need it during runtime

You can declare the init_data on the stack, CCF makes a copy of what it needs.
For clk_mux, clk_gate and friends, yes, use devm functions is the way to go

For the struct *clk, you can also use devm. Just keep a reference on the leaf
clock to be able to call set_rate() and prepare_enable(). You don't need the
rest.

this would leave us with only the struct clk instances in meson8_dwmac

You may have a look at drivers/mmc/host/meson-gx-mmc.c. The clock scheme of this
IP is actually very clock the ethernet one.

Cheers