linux-kernel - Re: [PATCH V2 2/5] regulator: qcom-rpmh: Add PM7325/PMR735A regulator support

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Date:   Tue, 16 Mar 2021 12:52:27 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     satya priya <skakit@...eaurora.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, rnayak@...eaurora.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, kgunda@...eaurora.org,
        David Collins <collinsd@...eaurora.org>
Subject: Re: [PATCH V2 2/5] regulator: qcom-rpmh: Add PM7325/PMR735A
 regulator support

On Mon, Mar 15, 2021 at 07:24:11PM +0530, satya priya wrote:
> Add support for PM7325/PMR735A regulators. This ensures
> that consumers are able to modify the physical state of PMIC
> regulators.
> 
> Signed-off-by: satya priya <skakit@...eaurora.org>
> ---
> Changes in V2:
>  - No change.
> 
>  drivers/regulator/qcom-rpmh-regulator.c | 53 ++++++++++++++++++++++++++++++++-
>  1 file changed, 52 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/regulator/qcom-rpmh-regulator.c b/drivers/regulator/qcom-rpmh-regulator.c
> index 9471890..3509523 100644
> --- a/drivers/regulator/qcom-rpmh-regulator.c
> +++ b/drivers/regulator/qcom-rpmh-regulator.c
> @@ -1,5 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
> -// Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
> +// Copyright (c) 2018-2021, The Linux Foundation. All rights reserved.
>  
>  #define pr_fmt(fmt) "%s: " fmt, __func__
>  
> @@ -1042,6 +1042,49 @@ static const struct rpmh_vreg_init_data pmx55_vreg_data[] = {
>  	{},
>  };
>  
> +static const struct rpmh_vreg_init_data pm7325_vreg_data[] = {
> +	RPMH_VREG("smps1",  "smp%s1",  &pmic5_hfsmps510, "vdd-s1"),
> +	RPMH_VREG("smps2",  "smp%s2",  &pmic5_ftsmps520, "vdd-s2"),
> +	RPMH_VREG("smps3",  "smp%s3",  &pmic5_ftsmps520, "vdd-s3"),
> +	RPMH_VREG("smps4",  "smp%s4",  &pmic5_ftsmps520, "vdd-s4"),
> +	RPMH_VREG("smps5",  "smp%s5",  &pmic5_ftsmps520, "vdd-s5"),
> +	RPMH_VREG("smps6",  "smp%s6",  &pmic5_ftsmps520, "vdd-s6"),
> +	RPMH_VREG("smps7",  "smp%s7",  &pmic5_ftsmps520, "vdd-s7"),
> +	RPMH_VREG("smps8",  "smp%s8",  &pmic5_hfsmps510, "vdd-s8"),
> +	RPMH_VREG("ldo1",   "ldo%s1",  &pmic5_nldo,      "vdd-l1-l4-l12-l15"),
> +	RPMH_VREG("ldo2",   "ldo%s2",  &pmic5_pldo,      "vdd-l2-l7"),
> +	RPMH_VREG("ldo3",   "ldo%s3",  &pmic5_nldo,      "vdd-l3"),
> +	RPMH_VREG("ldo4",   "ldo%s4",  &pmic5_nldo,      "vdd-l1-l4-l12-l15"),
> +	RPMH_VREG("ldo5",   "ldo%s5",  &pmic5_nldo,      "vdd-l5"),
> +	RPMH_VREG("ldo6",   "ldo%s6",  &pmic5_nldo,      "vdd-l6-l9-l10"),
> +	RPMH_VREG("ldo7",   "ldo%s7",  &pmic5_pldo,      "vdd-l2-l7"),
> +	RPMH_VREG("ldo8",   "ldo%s8",  &pmic5_nldo,      "vdd-l8"),
> +	RPMH_VREG("ldo9",   "ldo%s9",  &pmic5_nldo,      "vdd-l6-l9-l10"),
> +	RPMH_VREG("ldo10",  "ldo%s10", &pmic5_nldo,      "vdd-l6-l9-l10"),
> +	RPMH_VREG("ldo11",  "ldo%s11", &pmic5_pldo_lv,   "vdd-l11-l17-l18-l19"),
> +	RPMH_VREG("ldo12",  "ldo%s12", &pmic5_nldo,      "vdd-l1-l4-l12-l15"),
> +	RPMH_VREG("ldo13",  "ldo%s13", &pmic5_nldo,      "vdd-l13"),
> +	RPMH_VREG("ldo14",  "ldo%s14", &pmic5_nldo,      "vdd-l14-l16"),
> +	RPMH_VREG("ldo15",  "ldo%s15", &pmic5_nldo,      "vdd-l1-l4-l12-l15"),
> +	RPMH_VREG("ldo16",  "ldo%s16", &pmic5_nldo,      "vdd-l14-l16"),
> +	RPMH_VREG("ldo17",  "ldo%s17", &pmic5_pldo_lv,   "vdd-l11-l17-l18-l19"),
> +	RPMH_VREG("ldo18",  "ldo%s18", &pmic5_pldo_lv,   "vdd-l11-l17-l18-l19"),
> +	RPMH_VREG("ldo19",  "ldo%s19", &pmic5_pldo_lv,   "vdd-l11-l17-l18-l19"),
> +};

Could you help me understand these funky supply names? I see other RPMh
regulators also have them, so they are probably totally fine, but it
isn't clear to me what exactly the names represent. Apparently the LDO
itself is in the supply name, but many LDOs also list others.