linux-kernel - Re: [PATCH v2 3/6] clk: qcom: Add lpass clock controller driver for SC8280XP

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Message-ID: <ZHCiHtVkVL7_ZwaK@hovoldconsulting.com>
Date:   Fri, 26 May 2023 14:12:14 +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 3/6] clk: qcom: Add lpass clock controller driver for
 SC8280XP

On Thu, May 25, 2023 at 01:29:27PM +0100, Srinivas Kandagatla wrote:
> Add support for the lpass 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/Kconfig            |  8 ++++
>  drivers/clk/qcom/Makefile           |  1 +
>  drivers/clk/qcom/lpasscc-sc8280xp.c | 63 +++++++++++++++++++++++++++++
>  3 files changed, 72 insertions(+)
>  create mode 100644 drivers/clk/qcom/lpasscc-sc8280xp.c

> --- /dev/null
> +++ b/drivers/clk/qcom/lpasscc-sc8280xp.c
> @@ -0,0 +1,63 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2022, Linaro Limited
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/err.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>

Newline?

> +#include <dt-bindings/clock/qcom,lpasscc-sc8280xp.h>
> +
> +#include "common.h"
> +#include "reset.h"
> +
> +static const struct qcom_reset_map lpasscc_sc8280xp_resets[] = {
> +	[LPASS_AUDIO_SWR_TX_CGCR] = { 0xc010, 1 },
> +};
> +
> +static struct regmap_config lpasscc_sc8280xp_regmap_config = {
> +	.reg_bits = 32,
> +	.reg_stride = 4,
> +	.val_bits = 32,
> +	.name = "lpass-tcsr",
> +	.max_register = 0x12000,
> +};
> +
> +static const struct qcom_cc_desc lpasscc_reset_sc8280xp_desc = {

Nit: Isn't "lpasscc_sc8280xp" the prefix you should use throughout
(i.e. this should be lpasscc_sc8280xp_reset_desc or similar).

> +	.config = &lpasscc_sc8280xp_regmap_config,
> +	.resets = lpasscc_sc8280xp_resets,
> +	.num_resets = ARRAY_SIZE(lpasscc_sc8280xp_resets),
> +};
> +
> +static const struct of_device_id lpasscc_sc8280xp_match_table[] = {
> +	{
> +		.compatible = "qcom,sc8280xp-lpasscc",
> +		.data = &lpasscc_reset_sc8280xp_desc,
> +	},
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, lpasscc_sc8280xp_match_table);

Looks good otherwise:

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