Commit e0cbc202 authored by Okan Sahin's avatar Okan Sahin Committed by Lee Jones
Browse files

mfd: max77541: Add ADI MAX77541/MAX77540 PMIC Support 



MFD driver for MAX77541/MAX77540 to enable its sub devices.

The MAX77541 is a multi-function devices. It includes buck converter and ADC.

The MAX77540 is a high-efficiency buck converter with two 3A switching phases.

They have same regmap except for ADC part of MAX77541.

Signed-off-by: default avatarOkan Sahin <okan.sahin@analog.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230412111256.40013-6-okan.sahin@analog.com


Signed-off-by: default avatarLee Jones <lee@kernel.org>
parent 9a096a81

drivers/mfd/Kconfig

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@@ -784,6 +784,19 @@ config MFD_MAX14577 
	  additional drivers must be enabled in order to use the functionality

	  of the device.



config MFD_MAX77541

	tristate "Analog Devices MAX77541/77540 PMIC Support"

	depends on I2C=y

	select MFD_CORE

	select REGMAP_I2C

	select REGMAP_IRQ

	help

	  Say yes here to add support for Analog Devices MAX77541 and

	  MAX77540 Power Management ICs. This driver provides

	  common support for accessing the device; additional drivers

	  must be enabled in order to use the functionality of the device.

	  There are regulators and adc.



config MFD_MAX77620

	bool "Maxim Semiconductor MAX77620 and MAX20024 PMIC Support"

	depends on I2C=y

drivers/mfd/Makefile

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@@ -154,6 +154,7 @@ obj-$(CONFIG_MFD_DA9063) += da9063.o 
obj-$(CONFIG_MFD_DA9150)	+= da9150-core.o



obj-$(CONFIG_MFD_MAX14577)	+= max14577.o

obj-$(CONFIG_MFD_MAX77541)	+= max77541.o

obj-$(CONFIG_MFD_MAX77620)	+= max77620.o

obj-$(CONFIG_MFD_MAX77650)	+= max77650.o

obj-$(CONFIG_MFD_MAX77686)	+= max77686.o

drivers/mfd/max77541.c

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// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * Copyright (c) 2022 Analog Devices, Inc.

 * Driver for the MAX77540 and MAX77541

 */



#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/mfd/core.h>

#include <linux/mfd/max77541.h>

#include <linux/property.h>

#include <linux/regmap.h>



static const struct regmap_config max77541_regmap_config = {

	.reg_bits   = 8,

	.val_bits   = 8,

};



static const struct regmap_irq max77541_src_irqs[] = {

	{ .mask = MAX77541_BIT_INT_SRC_TOPSYS },

	{ .mask = MAX77541_BIT_INT_SRC_BUCK },

};



static const struct regmap_irq_chip max77541_src_irq_chip = {

	.name		= "max77541-src",

	.status_base	= MAX77541_REG_INT_SRC,

	.mask_base	= MAX77541_REG_INT_SRC_M,

	.num_regs	= 1,

	.irqs		= max77541_src_irqs,

	.num_irqs       = ARRAY_SIZE(max77541_src_irqs),

};



static const struct regmap_irq max77541_topsys_irqs[] = {

	{ .mask = MAX77541_BIT_TOPSYS_INT_TJ_120C },

	{ .mask = MAX77541_BIT_TOPSYS_INT_TJ_140C },

	{ .mask = MAX77541_BIT_TOPSYS_INT_TSHDN },

	{ .mask = MAX77541_BIT_TOPSYS_INT_UVLO },

	{ .mask = MAX77541_BIT_TOPSYS_INT_ALT_SWO },

	{ .mask = MAX77541_BIT_TOPSYS_INT_EXT_FREQ_DET },

};



static const struct regmap_irq_chip max77541_topsys_irq_chip = {

	.name		= "max77541-topsys",

	.status_base	= MAX77541_REG_TOPSYS_INT,

	.mask_base	= MAX77541_REG_TOPSYS_INT_M,

	.num_regs	= 1,

	.irqs		= max77541_topsys_irqs,

	.num_irqs	= ARRAY_SIZE(max77541_topsys_irqs),

};



static const struct regmap_irq max77541_buck_irqs[] = {

	{ .mask = MAX77541_BIT_BUCK_INT_M1_POK_FLT },

	{ .mask = MAX77541_BIT_BUCK_INT_M2_POK_FLT },

	{ .mask = MAX77541_BIT_BUCK_INT_M1_SCFLT },

	{ .mask = MAX77541_BIT_BUCK_INT_M2_SCFLT },

};



static const struct regmap_irq_chip max77541_buck_irq_chip = {

	.name		= "max77541-buck",

	.status_base	= MAX77541_REG_BUCK_INT,

	.mask_base	= MAX77541_REG_BUCK_INT_M,

	.num_regs	= 1,

	.irqs		= max77541_buck_irqs,

	.num_irqs	= ARRAY_SIZE(max77541_buck_irqs),

};



static const struct regmap_irq max77541_adc_irqs[] = {

	{ .mask = MAX77541_BIT_ADC_INT_CH1_I },

	{ .mask = MAX77541_BIT_ADC_INT_CH2_I },

	{ .mask = MAX77541_BIT_ADC_INT_CH3_I },

	{ .mask = MAX77541_BIT_ADC_INT_CH6_I },

};



static const struct regmap_irq_chip max77541_adc_irq_chip = {

	.name		= "max77541-adc",

	.status_base	= MAX77541_REG_ADC_INT,

	.mask_base	= MAX77541_REG_ADC_INT_M,

	.num_regs	= 1,

	.irqs		= max77541_adc_irqs,

	.num_irqs	= ARRAY_SIZE(max77541_adc_irqs),

};



static const struct mfd_cell max77540_devs[] = {

	MFD_CELL_OF("max77540-regulator", NULL, NULL, 0, 0, NULL),

};



static const struct mfd_cell max77541_devs[] = {

	MFD_CELL_OF("max77541-regulator", NULL, NULL, 0, 0, NULL),

	MFD_CELL_OF("max77541-adc", NULL, NULL, 0, 0, NULL),

};



static int max77541_pmic_irq_init(struct device *dev)

{

	struct max77541 *max77541 = dev_get_drvdata(dev);

	int irq = max77541->i2c->irq;

	int ret;



	ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,

				       IRQF_ONESHOT | IRQF_SHARED, 0,

				       &max77541_src_irq_chip,

				       &max77541->irq_data);

	if (ret)

		return ret;



	ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,

				       IRQF_ONESHOT | IRQF_SHARED, 0,

				       &max77541_topsys_irq_chip,

				       &max77541->irq_topsys);

	if (ret)

		return ret;



	ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,

				       IRQF_ONESHOT | IRQF_SHARED, 0,

				       &max77541_buck_irq_chip,

				       &max77541->irq_buck);

	if (ret)

		return ret;



	if (max77541->id == MAX77541) {

		ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,

					       IRQF_ONESHOT | IRQF_SHARED, 0,

					       &max77541_adc_irq_chip,

					       &max77541->irq_adc);

		if (ret)

			return ret;

	}



	return 0;

}



static int max77541_pmic_setup(struct device *dev)

{

	struct max77541 *max77541 = dev_get_drvdata(dev);

	const struct mfd_cell *cells;

	int n_devs;

	int ret;



	switch (max77541->id) {

	case MAX77540:

		cells =  max77540_devs;

		n_devs = ARRAY_SIZE(max77540_devs);

		break;

	case MAX77541:

		cells =  max77541_devs;

		n_devs = ARRAY_SIZE(max77541_devs);

		break;

	default:

		return -EINVAL;

	}



	ret = max77541_pmic_irq_init(dev);

	if (ret)

		return dev_err_probe(dev, ret, "Failed to initialize IRQ\n");



	ret = device_init_wakeup(dev, true);

	if (ret)

		return dev_err_probe(dev, ret, "Unable to init wakeup\n");



	return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,

				    cells, n_devs, NULL, 0, NULL);

}



static int max77541_probe(struct i2c_client *client)

{

	const struct i2c_device_id *id = i2c_client_get_device_id(client);

	struct device *dev = &client->dev;

	struct max77541 *max77541;



	max77541 = devm_kzalloc(dev, sizeof(*max77541), GFP_KERNEL);

	if (!max77541)

		return -ENOMEM;



	i2c_set_clientdata(client, max77541);

	max77541->i2c = client;



	max77541->id  = (enum max7754x_ids)device_get_match_data(dev);

	if (!max77541->id)

		max77541->id  = (enum max7754x_ids)id->driver_data;



	if (!max77541->id)

		return -EINVAL;



	max77541->regmap = devm_regmap_init_i2c(client,

						&max77541_regmap_config);

	if (IS_ERR(max77541->regmap))

		return dev_err_probe(dev, PTR_ERR(max77541->regmap),

				     "Failed to allocate register map\n");



	return max77541_pmic_setup(dev);

}



static const struct of_device_id max77541_of_id[] = {

	{

		.compatible = "adi,max77540",

		.data = (void *)MAX77540,

	},

	{

		.compatible = "adi,max77541",

		.data = (void *)MAX77541,

	},

	{ }

};

MODULE_DEVICE_TABLE(of, max77541_of_id);



static const struct i2c_device_id max77541_id[] = {

	{ "max77540", MAX77540 },

	{ "max77541", MAX77541 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, max77541_id);



static struct i2c_driver max77541_driver = {

	.driver = {

		.name = "max77541",

		.of_match_table = max77541_of_id,

	},

	.probe_new = max77541_probe,

	.id_table = max77541_id,

};

module_i2c_driver(max77541_driver);



MODULE_DESCRIPTION("MAX7740/MAX7741 Driver");

MODULE_AUTHOR("Okan Sahin <okan.sahin@analog.com>");

MODULE_LICENSE("GPL");

include/linux/mfd/max77541.h

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/* SPDX-License-Identifier: GPL-2.0-or-later */



#ifndef __MFD_MAX77541_H

#define __MFD_MAX77541_H



#include <linux/bits.h>

#include <linux/types.h>



/* REGISTERS */

#define MAX77541_REG_INT_SRC                    0x00

#define MAX77541_REG_INT_SRC_M                  0x01



#define MAX77541_BIT_INT_SRC_TOPSYS             BIT(0)

#define MAX77541_BIT_INT_SRC_BUCK               BIT(1)



#define MAX77541_REG_TOPSYS_INT                 0x02

#define MAX77541_REG_TOPSYS_INT_M               0x03



#define MAX77541_BIT_TOPSYS_INT_TJ_120C         BIT(0)

#define MAX77541_BIT_TOPSYS_INT_TJ_140C         BIT(1)

#define MAX77541_BIT_TOPSYS_INT_TSHDN           BIT(2)

#define MAX77541_BIT_TOPSYS_INT_UVLO            BIT(3)

#define MAX77541_BIT_TOPSYS_INT_ALT_SWO         BIT(4)

#define MAX77541_BIT_TOPSYS_INT_EXT_FREQ_DET    BIT(5)



/* REGULATORS */

#define MAX77541_REG_BUCK_INT                   0x20

#define MAX77541_REG_BUCK_INT_M                 0x21



#define MAX77541_BIT_BUCK_INT_M1_POK_FLT        BIT(0)

#define MAX77541_BIT_BUCK_INT_M2_POK_FLT        BIT(1)

#define MAX77541_BIT_BUCK_INT_M1_SCFLT          BIT(4)

#define MAX77541_BIT_BUCK_INT_M2_SCFLT          BIT(5)



#define MAX77541_REG_EN_CTRL                    0x0B



#define MAX77541_BIT_M1_EN                      BIT(0)

#define MAX77541_BIT_M2_EN                      BIT(1)



#define MAX77541_REG_M1_VOUT                    0x23

#define MAX77541_REG_M2_VOUT                    0x33



#define MAX77541_BITS_MX_VOUT                   GENMASK(7, 0)



#define MAX77541_REG_M1_CFG1                    0x25

#define MAX77541_REG_M2_CFG1                    0x35



#define MAX77541_BITS_MX_CFG1_RNG               GENMASK(7, 6)



/* ADC */

#define MAX77541_REG_ADC_INT                    0x70

#define MAX77541_REG_ADC_INT_M                  0x71



#define MAX77541_BIT_ADC_INT_CH1_I              BIT(0)

#define MAX77541_BIT_ADC_INT_CH2_I              BIT(1)

#define MAX77541_BIT_ADC_INT_CH3_I              BIT(2)

#define MAX77541_BIT_ADC_INT_CH6_I              BIT(5)



#define MAX77541_REG_ADC_DATA_CH1               0x72

#define MAX77541_REG_ADC_DATA_CH2               0x73

#define MAX77541_REG_ADC_DATA_CH3               0x74

#define MAX77541_REG_ADC_DATA_CH6               0x77



/* INTERRUPT MASKS*/

#define MAX77541_REG_INT_SRC_MASK               0x00

#define MAX77541_REG_TOPSYS_INT_MASK            0x00

#define MAX77541_REG_BUCK_INT_MASK              0x00



#define MAX77541_MAX_REGULATORS 2



enum max7754x_ids {

	MAX77540 = 1,

	MAX77541,

};



struct regmap;

struct regmap_irq_chip_data;

struct i2c_client;



struct max77541 {

	struct i2c_client *i2c;

	struct regmap *regmap;

	enum max7754x_ids id;



	struct regmap_irq_chip_data *irq_data;

	struct regmap_irq_chip_data *irq_buck;

	struct regmap_irq_chip_data *irq_topsys;

	struct regmap_irq_chip_data *irq_adc;

};



#endif /* __MFD_MAX77541_H */