linux-kernel - Re: [PATCH V7 3/5] regulator: Add a regulator driver for the PM8008 PMIC

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Date:   Fri, 18 Feb 2022 17:50:38 -0800
From:   Stephen Boyd <swboyd@...omium.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Satya Priya <quic_c_skakit@...cinc.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Das Srinagesh <gurus@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_collinsd@...cinc.com,
        quic_subbaram@...cinc.com, quic_jprakash@...cinc.com
Subject: Re: [PATCH V7 3/5] regulator: Add a regulator driver for the PM8008 PMIC

Quoting Satya Priya (2022-02-18 03:01:01)
> Qualcomm Technologies, Inc. PM8008 is an I2C controlled PMIC
> containing 7 LDO regulators.  Add a PM8008 regulator driver to
> support PMIC regulator management via the regulator framework.
>
> Signed-off-by: Satya Priya <quic_c_skakit@...cinc.com>

> diff --git a/drivers/regulator/qcom-pm8008-regulator.c b/drivers/regulator/qcom-pm8008-regulator.c
> new file mode 100644
> index 0000000..1c52864
> --- /dev/null
> +++ b/drivers/regulator/qcom-pm8008-regulator.c
> @@ -0,0 +1,205 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/* Copyright (c) 2022, The Linux Foundation. All rights reserved. */
> +
> +#include <linux/device.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/regulator/machine.h>
> +
> +#define VSET_STEP_MV                   8
> +#define VSET_STEP_UV                   (VSET_STEP_MV * 1000)
> +
> +#define LDO_ENABLE_REG(base)           ((base) + 0x46)
> +#define ENABLE_BIT                     BIT(7)

This is SPMI_COMMON_REG_ENABLE and SPMI_COMMON_ENABLE_MASK

> +
> +#define LDO_VSET_LB_REG(base)          ((base) + 0x40)
> +
> +#define LDO_STEPPER_CTL_REG(base)      ((base) + 0x3b)
> +#define DEFAULT_VOLTAGE_STEPPER_RATE   38400
> +#define STEP_RATE_MASK                 GENMASK(1, 0)
> +
> +struct regulator_data {

Please use a name like spmi_regulator_data :) Or pm8008_regulator_data?
Something that isn't so generic.

It seems similar to qcom_spmi-regulator.c so is there some reason we
can't shove this into there? Less code for things that aren't relevant I
guess?

> +       const char                      *name;
> +       const char                      *supply_name;
> +       u16                             base;
> +       int                             min_uv;
> +       int                             max_uv;
> +       int                             min_dropout_uv;
> +       const struct linear_range       *voltage_range;