Re: [PATCHv4 7/9] ASoC: fsl-asoc-card: add DT clock "cpu_sysclk" with generic codec

[Mark Brown]

On Wed, May 15, 2024 at 03:54:09PM +0200, Elinor Montmasson wrote:

> Add an optional DT clock "cpu_sysclk" to get the CPU DAI system-clock
> frequency when using the generic codec.
> It is set for both Tx and Rx.
> The way the frequency value is used is up to the CPU DAI driver
> implementation.

> +		struct clk *cpu_sysclk = clk_get(&pdev->dev, "cpu_sysclk");
> +		if (!IS_ERR(cpu_sysclk)) {
> +			priv->cpu_priv.sysclk_freq[TX] = clk_get_rate(cpu_sysclk);
> +			priv->cpu_priv.sysclk_freq[RX] = priv->cpu_priv.sysclk_freq[TX];
> +			clk_put(cpu_sysclk);
> +		}

I don't really understand the goal here - this is just reading whatever
frequency happens to be set in the hardware when the driver starts up
which if nothing else seems rather fragile?

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