linux-kernel - Re: [PATCH 2/2] ASoC: codecs: va-macro: add npl clk

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Date:   Tue, 15 Nov 2022 15:23:49 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        broonie@...nel.org
Cc:     alsa-devel@...a-project.org, lgirdwood@...il.com, perex@...ex.cz,
        tiwai@...e.com, linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 2/2] ASoC: codecs: va-macro: add npl clk

On 15/11/2022 11:55, Srinivas Kandagatla wrote:
> New versions of VA Macro has soundwire integrated, so handle the soundwire npl
> clock correctly in the codec driver.
> 
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
>  sound/soc/codecs/lpass-va-macro.c | 41 +++++++++++++++++++++++++++++++
>  1 file changed, 41 insertions(+)
> 
> diff --git a/sound/soc/codecs/lpass-va-macro.c b/sound/soc/codecs/lpass-va-macro.c
> index b0b6cf29cba3..d59af6d69c34 100644
> --- a/sound/soc/codecs/lpass-va-macro.c
> +++ b/sound/soc/codecs/lpass-va-macro.c
> @@ -205,6 +205,7 @@ struct va_macro {
>  	int dec_mode[VA_MACRO_NUM_DECIMATORS];
>  	struct regmap *regmap;
>  	struct clk *mclk;
> +	struct clk *npl;
>  	struct clk *macro;
>  	struct clk *dcodec;
>  	struct clk *fsgen;
> @@ -1332,6 +1333,9 @@ static int fsgen_gate_enable(struct clk_hw *hw)
>  	struct regmap *regmap = va->regmap;
>  	int ret;
>  
> +	if (va->has_swr_master)
> +		clk_prepare_enable(va->mclk);

No error path?

> +
>  	ret = va_macro_mclk_enable(va, true);
>  	if (!va->has_swr_master)
>  		return ret;
> @@ -1358,6 +1362,8 @@ static void fsgen_gate_disable(struct clk_hw *hw)
>  			   CDC_VA_SWR_CLK_EN_MASK, 0x0);
>  
>  	va_macro_mclk_enable(va, false);
> +	if (va->has_swr_master)
> +		clk_disable_unprepare(va->mclk);
>  }
>  
>  static int fsgen_gate_is_enabled(struct clk_hw *hw)
> @@ -1386,6 +1392,9 @@ static int va_macro_register_fsgen_output(struct va_macro *va)
>  	struct clk_init_data init;
>  	int ret;
>  
> +	if (va->has_swr_master)
> +		parent = va->npl;
> +
>  	parent_clk_name = __clk_get_name(parent);
>  
>  	of_property_read_string(np, "clock-output-names", &clk_name);
> @@ -1512,6 +1521,14 @@ static int va_macro_probe(struct platform_device *pdev)
>  	/* mclk rate */
>  	clk_set_rate(va->mclk, 2 * VA_MACRO_MCLK_FREQ);
>  
> +	if (va->has_swr_master) {
> +		va->npl = devm_clk_get(dev, "npl");

I think you miss:
ret = PTR_ERR(va->npl);

> +		if (IS_ERR(va->npl))
> +			goto err;
> +
> +		clk_set_rate(va->npl, 2 * VA_MACRO_MCLK_FREQ);
> +	}
> +
>  	ret = clk_prepare_enable(va->macro);
>  	if (ret)
>  		goto err;

Best regards,
Krzysztof