linux-kernel - Re: [PATCH v2 4/6] clk: qcom: Add lpass audio clock controller driver for SC8280XP

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Message-ID: <ZHCip-9Fu4RaPlz0@hovoldconsulting.com>
Date:   Fri, 26 May 2023 14:14:31 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     andersson@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, johan+linaro@...nel.org,
        agross@...nel.org, konrad.dybcio@...aro.org,
        mturquette@...libre.com, sboyd@...nel.org, conor+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/6] clk: qcom: Add lpass audio clock controller
 driver for SC8280XP

On Thu, May 25, 2023 at 01:29:28PM +0100, Srinivas Kandagatla wrote:
> Add support for the lpass audio clock controller found on SC8280XP based
> devices. This would allow lpass peripheral loader drivers to control the
> clocks and bring the subsystems out of reset.
> 
> Currently this patch only supports resets as the Q6DSP is in control of
> LPASS IP which manages most of the clocks via Q6PRM service on GPR rpmsg
> channel.
> 
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
>  drivers/clk/qcom/lpasscc-sc8280xp.c | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/drivers/clk/qcom/lpasscc-sc8280xp.c b/drivers/clk/qcom/lpasscc-sc8280xp.c
> index 547f15d41a9d..60cc3c98d03d 100644
> --- a/drivers/clk/qcom/lpasscc-sc8280xp.c
> +++ b/drivers/clk/qcom/lpasscc-sc8280xp.c
> @@ -14,6 +14,26 @@
>  #include "common.h"
>  #include "reset.h"
>  
> +static const struct qcom_reset_map lpass_audiocc_sc8280xp_resets[] = {
> +	[LPASS_AUDIO_SWR_RX_CGCR] =  { 0xa0, 1 },
> +	[LPASS_AUDIO_SWR_WSA_CGCR] = { 0xb0, 1 },
> +	[LPASS_AUDIO_SWR_WSA2_CGCR] =  { 0xd8, 1 },
> +};
> +
> +static struct regmap_config lpass_audiocc_sc8280xp_regmap_config = {
> +	.reg_bits = 32,
> +	.reg_stride = 4,
> +	.val_bits = 32,
> +	.name = "lpass-audio-csr",
> +	.max_register = 0x1000,
> +};
> +
> +static const struct qcom_cc_desc lpass_audiocc_reset_sc8280xp_desc = {

Similar here, should this not be lpass_audiocc_sc8280xp_reset_desc or
similar for consistency?

> +	.config = &lpass_audiocc_sc8280xp_regmap_config,
> +	.resets = lpass_audiocc_sc8280xp_resets,
> +	.num_resets = ARRAY_SIZE(lpass_audiocc_sc8280xp_resets),
> +};
> +
>  static const struct qcom_reset_map lpasscc_sc8280xp_resets[] = {
>  	[LPASS_AUDIO_SWR_TX_CGCR] = { 0xc010, 1 },
>  };
> @@ -34,6 +54,9 @@ static const struct qcom_cc_desc lpasscc_reset_sc8280xp_desc = {
>  
>  static const struct of_device_id lpasscc_sc8280xp_match_table[] = {
>  	{
> +		.compatible = "qcom,sc8280xp-lpassaudiocc",
> +		.data = &lpass_audiocc_reset_sc8280xp_desc,
> +	}, {
>  		.compatible = "qcom,sc8280xp-lpasscc",
>  		.data = &lpasscc_reset_sc8280xp_desc,
>  	},

LGTM otherwise:

Reviewed-by: Johan Hovold <johan+linaro@...nel.org>