Date:   Wed, 30 May 2018 14:14:25 +0300
From:   Matti Vaittinen <mazziesaccount@...il.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        mturquette@...libre.com, sboyd@...nel.org, robh+dt@...nel.org,
        mark.rutland@....com, lee.jones@...aro.org, lgirdwood@...il.com,
        mazziesaccount@...il.com, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        mikko.mutanen@...rohmeurope.com, heikki.haikola@...rohmeurope.com
Subject: Re: Applied "regulator: bd71837: BD71837 PMIC regulator driver" to
 the regulator tree

Hello All,

On Wed, May 30, 2018 at 12:02:56PM +0100, Mark Brown wrote:
> The patch
> 
>    regulator: bd71837: BD71837 PMIC regulator driver
> 
> has been applied to the regulator tree at
> 
>    https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

Does this mean this single patch was applied? I am sorry if I did not
follow correct policy/way of informing the dependencies - but there is a
dependency. The patch 1/6 contains the header file
include/linux/mfd/bd71837.h with bunch of definitions this patch is
requiring.

So If Mark can apply all of these patches (or at least the MFD parts
which is patch 1/6) to his tree - then we are Ok. But if the MFD needs
to go via Lee's tree - then I need some process guidance in order to
understand how this goes and what is expected from me =)

Br,
	Matti Vaittinen


> 
> All being well this means that it will be integrated into the linux-next
> tree (usually sometime in the next 24 hours) and sent to Linus during
> the next merge window (or sooner if it is a bug fix), however if
> problems are discovered then the patch may be dropped or reverted.  
> 
> You may get further e-mails resulting from automated or manual testing
> and review of the tree, please engage with people reporting problems and
> send followup patches addressing any issues that are reported if needed.
> 
> If any updates are required or you are submitting further changes they
> should be sent as incremental updates against current git, existing
> patches will not be replaced.
> 
> Please add any relevant lists and maintainers to the CCs when replying
> to this mail.
> 
> Thanks,
> Mark
> 
> From ba08799e90b5935a3df20766a73b5841046f6832 Mon Sep 17 00:00:00 2001
> From: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> Date: Wed, 30 May 2018 11:43:43 +0300
> Subject: [PATCH] regulator: bd71837: BD71837 PMIC regulator driver
> 
> Support for controlling the 8 bucks and 7 LDOs the PMIC contains.
> 
> Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> Signed-off-by: Mark Brown <broonie@...nel.org>
> ---
>  drivers/regulator/Kconfig             |  11 +
>  drivers/regulator/Makefile            |   1 +
>  drivers/regulator/bd71837-regulator.c | 640 ++++++++++++++++++++++++++
>  3 files changed, 652 insertions(+)
>  create mode 100644 drivers/regulator/bd71837-regulator.c
> 
> diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
> index 4efae3b7e746..5dbccf5f3037 100644
> --- a/drivers/regulator/Kconfig
> +++ b/drivers/regulator/Kconfig
> @@ -180,6 +180,17 @@ config REGULATOR_BCM590XX
>  	  BCM590xx PMUs. This will enable support for the software
>  	  controllable LDO/Switching regulators.
>  
> +config REGULATOR_BD71837
> +	tristate "ROHM BD71837 Power Regulator"
> +	depends on MFD_BD71837
> +	help
> +	  This driver supports voltage regulators on ROHM BD71837 PMIC.
> +	  This will enable support for the software controllable buck
> +	  and LDO regulators.
> +
> +	  This driver can also be built as a module. If so, the module
> +	  will be called bd71837-regulator.
> +
>  config REGULATOR_BD9571MWV
>  	tristate "ROHM BD9571MWV Regulators"
>  	depends on MFD_BD9571MWV
> diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
> index d81fb02bd6e9..bd818ceb7c72 100644
> --- a/drivers/regulator/Makefile
> +++ b/drivers/regulator/Makefile
> @@ -27,6 +27,7 @@ obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o
>  obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o
>  obj-$(CONFIG_REGULATOR_AXP20X) += axp20x-regulator.o
>  obj-$(CONFIG_REGULATOR_BCM590XX) += bcm590xx-regulator.o
> +obj-$(CONFIG_REGULATOR_BD71837) += bd71837-regulator.o
>  obj-$(CONFIG_REGULATOR_BD9571MWV) += bd9571mwv-regulator.o
>  obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o
>  obj-$(CONFIG_REGULATOR_DA9052)	+= da9052-regulator.o
> diff --git a/drivers/regulator/bd71837-regulator.c b/drivers/regulator/bd71837-regulator.c
> new file mode 100644
> index 000000000000..6eae4d0432a2
> --- /dev/null
> +++ b/drivers/regulator/bd71837-regulator.c
> @@ -0,0 +1,640 @@
> +// SPDX-License-Identifier: GPL-2.0
> +// Copyright (C) 2018 ROHM Semiconductors
> +// bd71837-regulator.c ROHM BD71837MWV regulator driver
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/err.h>
> +#include <linux/interrupt.h>
> +#include <linux/platform_device.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/regulator/machine.h>
> +#include <linux/delay.h>
> +#include <linux/slab.h>
> +#include <linux/gpio.h>
> +#include <linux/mfd/bd71837.h>
> +#include <linux/regulator/of_regulator.h>
> +
> +struct bd71837_pmic {
> +	struct regulator_desc descs[BD71837_REGULATOR_CNT];
> +	struct bd71837 *mfd;
> +	struct platform_device *pdev;
> +	struct regulator_dev *rdev[BD71837_REGULATOR_CNT];
> +};
> +
> +/*
> + * BUCK1/2/3/4
> + * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
> + * 00: 10.00mV/usec 10mV 1uS
> + * 01: 5.00mV/usec	10mV 2uS
> + * 10: 2.50mV/usec	10mV 4uS
> + * 11: 1.25mV/usec	10mV 8uS
> + */
> +static int bd71837_buck1234_set_ramp_delay(struct regulator_dev *rdev,
> +					   int ramp_delay)
> +{
> +	struct bd71837_pmic *pmic = rdev_get_drvdata(rdev);
> +	struct bd71837 *mfd = pmic->mfd;
> +	int id = rdev->desc->id;
> +	unsigned int ramp_value = BUCK_RAMPRATE_10P00MV;
> +
> +	dev_dbg(&(pmic->pdev->dev), "Buck[%d] Set Ramp = %d\n", id + 1,
> +		ramp_delay);
> +	switch (ramp_delay) {
> +	case 1 ... 1250:
> +		ramp_value = BUCK_RAMPRATE_1P25MV;
> +		break;
> +	case 1251 ... 2500:
> +		ramp_value = BUCK_RAMPRATE_2P50MV;
> +		break;
> +	case 2501 ... 5000:
> +		ramp_value = BUCK_RAMPRATE_5P00MV;
> +		break;
> +	case 5001 ... 10000:
> +		ramp_value = BUCK_RAMPRATE_10P00MV;
> +		break;
> +	default:
> +		ramp_value = BUCK_RAMPRATE_10P00MV;
> +		dev_err(&pmic->pdev->dev,
> +			"%s: ramp_delay: %d not supported, setting 10000mV//us\n",
> +			rdev->desc->name, ramp_delay);
> +	}
> +
> +	return regmap_update_bits(mfd->regmap, BD71837_REG_BUCK1_CTRL + id,
> +				  BUCK_RAMPRATE_MASK, ramp_value << 6);
> +}
> +
> +/* Bucks 1 to 4 support DVS. PWM mode is used when voltage is changed.
> + * Bucks 5 to 8 and LDOs can use PFM and must be disabled when voltage
> + * is changed. Hence we return -EBUSY for these if voltage is changed
> + * when BUCK/LDO is enabled.
> + */
> +static int bd71837_set_voltage_sel_restricted(struct regulator_dev *rdev,
> +						    unsigned int sel)
> +{
> +	int ret;
> +
> +	ret = regulator_is_enabled_regmap(rdev);
> +	if (!ret)
> +		ret = regulator_set_voltage_sel_regmap(rdev, sel);
> +	else if (ret == 1)
> +		ret = -EBUSY;
> +	return ret;
> +}
> +
> +static struct regulator_ops bd71837_ldo_regulator_ops = {
> +	.enable = regulator_enable_regmap,
> +	.disable = regulator_disable_regmap,
> +	.is_enabled = regulator_is_enabled_regmap,
> +	.list_voltage = regulator_list_voltage_linear_range,
> +	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
> +	.get_voltage_sel = regulator_get_voltage_sel_regmap,
> +};
> +
> +static struct regulator_ops bd71837_ldo_regulator_nolinear_ops = {
> +	.enable = regulator_enable_regmap,
> +	.disable = regulator_disable_regmap,
> +	.is_enabled = regulator_is_enabled_regmap,
> +	.list_voltage = regulator_list_voltage_table,
> +	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
> +	.get_voltage_sel = regulator_get_voltage_sel_regmap,
> +};
> +
> +static struct regulator_ops bd71837_buck_regulator_ops = {
> +	.enable = regulator_enable_regmap,
> +	.disable = regulator_disable_regmap,
> +	.is_enabled = regulator_is_enabled_regmap,
> +	.list_voltage = regulator_list_voltage_linear_range,
> +	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
> +	.get_voltage_sel = regulator_get_voltage_sel_regmap,
> +	.set_voltage_time_sel = regulator_set_voltage_time_sel,
> +};
> +
> +static struct regulator_ops bd71837_buck_regulator_nolinear_ops = {
> +	.enable = regulator_enable_regmap,
> +	.disable = regulator_disable_regmap,
> +	.is_enabled = regulator_is_enabled_regmap,
> +	.list_voltage = regulator_list_voltage_table,
> +	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
> +	.get_voltage_sel = regulator_get_voltage_sel_regmap,
> +	.set_voltage_time_sel = regulator_set_voltage_time_sel,
> +};
> +
> +static struct regulator_ops bd71837_buck1234_regulator_ops = {
> +	.enable = regulator_enable_regmap,
> +	.disable = regulator_disable_regmap,
> +	.is_enabled = regulator_is_enabled_regmap,
> +	.list_voltage = regulator_list_voltage_linear_range,
> +	.set_voltage_sel = regulator_set_voltage_sel_regmap,
> +	.get_voltage_sel = regulator_get_voltage_sel_regmap,
> +	.set_voltage_time_sel = regulator_set_voltage_time_sel,
> +	.set_ramp_delay = bd71837_buck1234_set_ramp_delay,
> +};
> +
> +/*
> + * BUCK1/2/3/4
> + * 0.70 to 1.30V (10mV step)
> + */
> +static const struct regulator_linear_range bd71837_buck1234_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x3C, 10000),
> +	REGULATOR_LINEAR_RANGE(1300000, 0x3D, 0x3F, 0),
> +};
> +
> +/*
> + * BUCK5
> + * 0.9V to 1.35V ()
> + */
> +static const struct regulator_linear_range bd71837_buck5_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
> +	REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
> +	REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
> +};
> +
> +/*
> + * BUCK6
> + * 3.0V to 3.3V (step 100mV)
> + */
> +static const struct regulator_linear_range bd71837_buck6_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
> +};
> +
> +/*
> + * BUCK7
> + * 000 = 1.605V
> + * 001 = 1.695V
> + * 010 = 1.755V
> + * 011 = 1.8V (Initial)
> + * 100 = 1.845V
> + * 101 = 1.905V
> + * 110 = 1.95V
> + * 111 = 1.995V
> + */
> +static const unsigned int buck_7_volts[] = {
> +	1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000
> +};
> +
> +/*
> + * BUCK8
> + * 0.8V to 1.40V (step 10mV)
> + */
> +static const struct regulator_linear_range bd71837_buck8_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000),
> +	REGULATOR_LINEAR_RANGE(1400000, 0x3D, 0x3F, 0),
> +};
> +
> +/*
> + * LDO1
> + * 3.0 to 3.3V (100mV step)
> + */
> +static const struct regulator_linear_range bd71837_ldo1_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
> +};
> +
> +/*
> + * LDO2
> + * 0.8 or 0.9V
> + */
> +const unsigned int ldo_2_volts[] = {
> +	900000, 800000
> +};
> +
> +/*
> + * LDO3
> + * 1.8 to 3.3V (100mV step)
> + */
> +static const struct regulator_linear_range bd71837_ldo3_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
> +};
> +
> +/*
> + * LDO4
> + * 0.9 to 1.8V (100mV step)
> + */
> +static const struct regulator_linear_range bd71837_ldo4_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
> +	REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
> +};
> +
> +/*
> + * LDO5
> + * 1.8 to 3.3V (100mV step)
> + */
> +static const struct regulator_linear_range bd71837_ldo5_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
> +};
> +
> +/*
> + * LDO6
> + * 0.9 to 1.8V (100mV step)
> + */
> +static const struct regulator_linear_range bd71837_ldo6_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
> +	REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
> +};
> +
> +/*
> + * LDO7
> + * 1.8 to 3.3V (100mV step)
> + */
> +static const struct regulator_linear_range bd71837_ldo7_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
> +};
> +
> +static const struct regulator_desc bd71837_regulators[] = {
> +	{
> +		.name = "buck1",
> +		.of_match = of_match_ptr("BUCK1"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_BUCK1,
> +		.ops = &bd71837_buck1234_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_BUCK1_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_buck1234_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
> +		.vsel_reg = BD71837_REG_BUCK1_VOLT_RUN,
> +		.vsel_mask = BUCK1_RUN_MASK,
> +		.enable_reg = BD71837_REG_BUCK1_CTRL,
> +		.enable_mask = BD71837_BUCK_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "buck2",
> +		.of_match = of_match_ptr("BUCK2"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_BUCK2,
> +		.ops = &bd71837_buck1234_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_BUCK2_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_buck1234_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
> +		.vsel_reg = BD71837_REG_BUCK2_VOLT_RUN,
> +		.vsel_mask = BUCK2_RUN_MASK,
> +		.enable_reg = BD71837_REG_BUCK2_CTRL,
> +		.enable_mask = BD71837_BUCK_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "buck3",
> +		.of_match = of_match_ptr("BUCK3"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_BUCK3,
> +		.ops = &bd71837_buck1234_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_BUCK3_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_buck1234_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
> +		.vsel_reg = BD71837_REG_BUCK3_VOLT_RUN,
> +		.vsel_mask = BUCK3_RUN_MASK,
> +		.enable_reg = BD71837_REG_BUCK3_CTRL,
> +		.enable_mask = BD71837_BUCK_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "buck4",
> +		.of_match = of_match_ptr("BUCK4"),
> +		.regulators_node = of_match_ptr("regulators"),
> +			.id = BD71837_BUCK4,
> +		.ops = &bd71837_buck1234_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_BUCK4_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_buck1234_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
> +		.vsel_reg = BD71837_REG_BUCK4_VOLT_RUN,
> +		.vsel_mask = BUCK4_RUN_MASK,
> +		.enable_reg = BD71837_REG_BUCK4_CTRL,
> +		.enable_mask = BD71837_BUCK_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "buck5",
> +		.of_match = of_match_ptr("BUCK5"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_BUCK5,
> +		.ops = &bd71837_buck_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_BUCK5_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_buck5_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_buck5_voltage_ranges),
> +		.vsel_reg = BD71837_REG_BUCK5_VOLT,
> +		.vsel_mask = BUCK5_MASK,
> +		.enable_reg = BD71837_REG_BUCK5_CTRL,
> +		.enable_mask = BD71837_BUCK_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "buck6",
> +		.of_match = of_match_ptr("BUCK6"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_BUCK6,
> +		.ops = &bd71837_buck_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_BUCK6_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_buck6_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_buck6_voltage_ranges),
> +		.vsel_reg = BD71837_REG_BUCK6_VOLT,
> +		.vsel_mask = BUCK6_MASK,
> +		.enable_reg = BD71837_REG_BUCK6_CTRL,
> +		.enable_mask = BD71837_BUCK_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "buck7",
> +		.of_match = of_match_ptr("BUCK7"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_BUCK7,
> +		.ops = &bd71837_buck_regulator_nolinear_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.volt_table = &buck_7_volts[0],
> +		.n_voltages = ARRAY_SIZE(buck_7_volts),
> +		.vsel_reg = BD71837_REG_BUCK7_VOLT,
> +		.vsel_mask = BUCK7_MASK,
> +		.enable_reg = BD71837_REG_BUCK7_CTRL,
> +		.enable_mask = BD71837_BUCK_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "buck8",
> +		.of_match = of_match_ptr("BUCK8"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_BUCK8,
> +		.ops = &bd71837_buck_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_BUCK8_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_buck8_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_buck8_voltage_ranges),
> +		.vsel_reg = BD71837_REG_BUCK8_VOLT,
> +		.vsel_mask = BUCK8_MASK,
> +		.enable_reg = BD71837_REG_BUCK8_CTRL,
> +		.enable_mask = BD71837_BUCK_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "ldo1",
> +		.of_match = of_match_ptr("LDO1"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_LDO1,
> +		.ops = &bd71837_ldo_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_LDO1_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_ldo1_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo1_voltage_ranges),
> +		.vsel_reg = BD71837_REG_LDO1_VOLT,
> +		.vsel_mask = LDO1_MASK,
> +		.enable_reg = BD71837_REG_LDO1_VOLT,
> +		.enable_mask = BD71837_LDO_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "ldo2",
> +		.of_match = of_match_ptr("LDO2"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_LDO2,
> +		.ops = &bd71837_ldo_regulator_nolinear_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.volt_table = &ldo_2_volts[0],
> +		.vsel_reg = BD71837_REG_LDO2_VOLT,
> +		.vsel_mask = LDO2_MASK,
> +		.n_voltages = ARRAY_SIZE(ldo_2_volts),
> +		.n_voltages = BD71837_LDO2_VOLTAGE_NUM,
> +		.enable_reg = BD71837_REG_LDO2_VOLT,
> +		.enable_mask = BD71837_LDO_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "ldo3",
> +		.of_match = of_match_ptr("LDO3"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_LDO3,
> +		.ops = &bd71837_ldo_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_LDO3_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_ldo3_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo3_voltage_ranges),
> +		.vsel_reg = BD71837_REG_LDO3_VOLT,
> +		.vsel_mask = LDO3_MASK,
> +		.enable_reg = BD71837_REG_LDO3_VOLT,
> +		.enable_mask = BD71837_LDO_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "ldo4",
> +		.of_match = of_match_ptr("LDO4"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_LDO4,
> +		.ops = &bd71837_ldo_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_LDO4_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_ldo4_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo4_voltage_ranges),
> +		.vsel_reg = BD71837_REG_LDO4_VOLT,
> +		.vsel_mask = LDO4_MASK,
> +		.enable_reg = BD71837_REG_LDO4_VOLT,
> +		.enable_mask = BD71837_LDO_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "ldo5",
> +		.of_match = of_match_ptr("LDO5"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_LDO5,
> +		.ops = &bd71837_ldo_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_LDO5_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_ldo5_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_voltage_ranges),
> +		/* LDO5 is supplied by buck6 */
> +		.supply_name = "buck6",
> +		.vsel_reg = BD71837_REG_LDO5_VOLT,
> +		.vsel_mask = LDO5_MASK,
> +		.enable_reg = BD71837_REG_LDO5_VOLT,
> +		.enable_mask = BD71837_LDO_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "ldo6",
> +		.of_match = of_match_ptr("LDO6"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_LDO6,
> +		.ops = &bd71837_ldo_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_LDO6_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_ldo6_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo6_voltage_ranges),
> +		/* LDO6 is supplied by buck7 */
> +		.supply_name = "buck7",
> +		.vsel_reg = BD71837_REG_LDO6_VOLT,
> +		.vsel_mask = LDO6_MASK,
> +		.enable_reg = BD71837_REG_LDO6_VOLT,
> +		.enable_mask = BD71837_LDO_EN,
> +		.owner = THIS_MODULE,
> +	},
> +	{
> +		.name = "ldo7",
> +		.of_match = of_match_ptr("LDO7"),
> +		.regulators_node = of_match_ptr("regulators"),
> +		.id = BD71837_LDO7,
> +		.ops = &bd71837_ldo_regulator_ops,
> +		.type = REGULATOR_VOLTAGE,
> +		.n_voltages = BD71837_LDO7_VOLTAGE_NUM,
> +		.linear_ranges = bd71837_ldo7_voltage_ranges,
> +		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_voltage_ranges),
> +		.vsel_reg = BD71837_REG_LDO7_VOLT,
> +		.vsel_mask = LDO7_MASK,
> +		.enable_reg = BD71837_REG_LDO7_VOLT,
> +		.enable_mask = BD71837_LDO_EN,
> +		.owner = THIS_MODULE,
> +	},
> +};
> +
> +struct reg_init {
> +	unsigned int reg;
> +	unsigned int mask;
> +};
> +
> +static int bd71837_probe(struct platform_device *pdev)
> +{
> +	struct bd71837_pmic *pmic;
> +	struct bd71837_board *pdata;
> +	struct regulator_config config = { 0 };
> +	struct reg_init pmic_regulator_inits[] = {
> +		{
> +			.reg = BD71837_REG_BUCK1_CTRL,
> +			.mask = BD71837_BUCK_SEL,
> +		}, {
> +			.reg = BD71837_REG_BUCK2_CTRL,
> +			.mask = BD71837_BUCK_SEL,
> +		}, {
> +			.reg = BD71837_REG_BUCK3_CTRL,
> +			.mask = BD71837_BUCK_SEL,
> +		}, {
> +			.reg = BD71837_REG_BUCK4_CTRL,
> +			.mask = BD71837_BUCK_SEL,
> +		}, {
> +			.reg = BD71837_REG_BUCK5_CTRL,
> +			.mask = BD71837_BUCK_SEL,
> +		}, {
> +			.reg = BD71837_REG_BUCK6_CTRL,
> +			.mask = BD71837_BUCK_SEL,
> +		}, {
> +			.reg = BD71837_REG_BUCK7_CTRL,
> +			.mask = BD71837_BUCK_SEL,
> +		}, {
> +			.reg = BD71837_REG_BUCK8_CTRL,
> +			.mask = BD71837_BUCK_SEL,
> +		}, {
> +			.reg = BD71837_REG_LDO1_VOLT,
> +			.mask = BD71837_LDO_SEL,
> +		}, {
> +			.reg = BD71837_REG_LDO2_VOLT,
> +			.mask = BD71837_LDO_SEL,
> +		}, {
> +			.reg = BD71837_REG_LDO3_VOLT,
> +			.mask = BD71837_LDO_SEL,
> +		}, {
> +			.reg = BD71837_REG_LDO4_VOLT,
> +			.mask = BD71837_LDO_SEL,
> +		}, {
> +			.reg = BD71837_REG_LDO5_VOLT,
> +			.mask = BD71837_LDO_SEL,
> +		}, {
> +			.reg = BD71837_REG_LDO6_VOLT,
> +			.mask = BD71837_LDO_SEL,
> +		}, {
> +			.reg = BD71837_REG_LDO7_VOLT,
> +			.mask = BD71837_LDO_SEL,
> +		}
> +	};
> +
> +	int i, err;
> +
> +	pmic = devm_kzalloc(&pdev->dev, sizeof(struct bd71837_pmic),
> +			    GFP_KERNEL);
> +	if (!pmic)
> +		return -ENOMEM;
> +
> +	memcpy(pmic->descs, bd71837_regulators, sizeof(pmic->descs));
> +
> +	pmic->pdev = pdev;
> +	pmic->mfd = dev_get_drvdata(pdev->dev.parent);
> +
> +	if (!pmic->mfd) {
> +		dev_err(&pdev->dev, "No MFD driver data\n");
> +		err = -EINVAL;
> +		goto err;
> +	}
> +	platform_set_drvdata(pdev, pmic);
> +	pdata = dev_get_platdata(pmic->mfd->dev);
> +
> +	/* Register LOCK release */
> +	err = regmap_update_bits(pmic->mfd->regmap, BD71837_REG_REGLOCK,
> +				 (REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
> +	if (err) {
> +		dev_err(&pmic->pdev->dev, "Failed to unlock PMIC (%d)\n", err);
> +		goto err;
> +	} else {
> +		dev_dbg(&pmic->pdev->dev, "%s: Unlocked lock register 0x%x\n",
> +			__func__, BD71837_REG_REGLOCK);
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(pmic_regulator_inits); i++) {
> +
> +		struct regulator_desc *desc;
> +		struct regulator_dev *rdev;
> +
> +		desc = &pmic->descs[i];
> +
> +		if (pdata)
> +			config.init_data = pdata->init_data[i];
> +
> +		config.dev = pdev->dev.parent;
> +		config.driver_data = pmic;
> +		config.regmap = pmic->mfd->regmap;
> +
> +		rdev = devm_regulator_register(&pdev->dev, desc, &config);
> +		if (IS_ERR(rdev)) {
> +			dev_err(pmic->mfd->dev,
> +				"failed to register %s regulator\n",
> +				desc->name);
> +			err = PTR_ERR(rdev);
> +			goto err;
> +		}
> +		/* Regulator register gets the regulator constraints and
> +		 * applies them (set_machine_constraints). This should have
> +		 * turned the control register(s) to correct values and we
> +		 * can now switch the control from PMIC state machine to the
> +		 * register interface
> +		 */
> +		err = regmap_update_bits(pmic->mfd->regmap,
> +					 pmic_regulator_inits[i].reg,
> +					 pmic_regulator_inits[i].mask,
> +					 0xFFFFFFFF);
> +		if (err) {
> +			dev_err(&pmic->pdev->dev,
> +				"Failed to write BUCK/LDO SEL bit for (%s)\n",
> +				desc->name);
> +			goto err;
> +		}
> +
> +		pmic->rdev[i] = rdev;
> +	}
> +
> +	return 0;
> +
> +err:
> +	return err;
> +}
> +
> +static struct platform_driver bd71837_regulator = {
> +	.driver = {
> +		.name = "bd71837-pmic",
> +		.owner = THIS_MODULE,
> +	},
> +	.probe = bd71837_probe,
> +};
> +
> +module_platform_driver(bd71837_regulator);
> +
> +MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@...rohmeurope.com>");
> +MODULE_DESCRIPTION("BD71837 voltage regulator driver");
> +MODULE_LICENSE("GPL");
> -- 
> 2.17.0
> 

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