Re: [PATCH v5 12/14] ASoC: rsnd: src: Add SRC reset and clock support for RZ/G3E

[Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>]

Hi John

> The RZ/G3E SoC requires explicit SCU (Sampling Rate Converter Unit)
> reset and clock management unlike previous R-Car generations:
> 
> - scu_clk: SCU module clock
> - scu_clkx2: SCU double-rate clock
> - scu_supply_clk: SCU supply clock
> 
> Without these clocks enabled, the SRC module cannot operate on RZ/G3E.
> Add support for the shared SCU reset controller used by the SRC modules
> on the Renesas RZ/G3E SoC. All SRC instances are gated by the same "scu"
> reset line.
> 
> Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
> ---
(snip)
> +struct rsnd_src_ctrl {
> +	struct clk *scu;
> +	struct clk *scu_x2;
> +	struct clk *scu_supply;
> +};

I noticed that "scu_supply" is used in init/quit, but scu/scu_x2 are
enabled when probe time only ?
I guess this is because it is needed for whole SRC ?

If so, it need to count whole SRC user and enable/disable it when
1st/last user.

Thank you for your help !!

Best regards
---
Kuninori Morimoto