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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: Okan Sahin <okan.sahin@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20230412111256.40013-6-okan.sahin@analog.com Signed-off-by: Lee Jones <lee@kernel.org>
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‎drivers/mfd/Kconfig‎

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@@ -784,6 +784,19 @@ config MFD_MAX14577
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additional drivers must be enabled in order to use the functionality
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of the device.
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config MFD_MAX77541
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tristate "Analog Devices MAX77541/77540 PMIC Support"
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depends on I2C=y
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select MFD_CORE
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select REGMAP_I2C
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select REGMAP_IRQ
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help
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Say yes here to add support for Analog Devices MAX77541 and
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MAX77540 Power Management ICs. This driver provides
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common support for accessing the device; additional drivers
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must be enabled in order to use the functionality of the device.
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There are regulators and adc.
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config MFD_MAX77620
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bool "Maxim Semiconductor MAX77620 and MAX20024 PMIC Support"
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depends on I2C=y

‎drivers/mfd/Makefile‎

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@@ -154,6 +154,7 @@ obj-$(CONFIG_MFD_DA9063) += da9063.o
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obj-$(CONFIG_MFD_DA9150) += da9150-core.o
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obj-$(CONFIG_MFD_MAX14577) += max14577.o
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obj-$(CONFIG_MFD_MAX77541) += max77541.o
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obj-$(CONFIG_MFD_MAX77620) += max77620.o
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obj-$(CONFIG_MFD_MAX77650) += max77650.o
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obj-$(CONFIG_MFD_MAX77686) += max77686.o

‎drivers/mfd/max77541.c‎

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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2022 Analog Devices, Inc.
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* Driver for the MAX77540 and MAX77541
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*/
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/max77541.h>
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#include <linux/property.h>
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#include <linux/regmap.h>
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static const struct regmap_config max77541_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static const struct regmap_irq max77541_src_irqs[] = {
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{ .mask = MAX77541_BIT_INT_SRC_TOPSYS },
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{ .mask = MAX77541_BIT_INT_SRC_BUCK },
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};
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static const struct regmap_irq_chip max77541_src_irq_chip = {
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.name = "max77541-src",
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.status_base = MAX77541_REG_INT_SRC,
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.mask_base = MAX77541_REG_INT_SRC_M,
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.num_regs = 1,
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.irqs = max77541_src_irqs,
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.num_irqs = ARRAY_SIZE(max77541_src_irqs),
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};
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static const struct regmap_irq max77541_topsys_irqs[] = {
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{ .mask = MAX77541_BIT_TOPSYS_INT_TJ_120C },
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{ .mask = MAX77541_BIT_TOPSYS_INT_TJ_140C },
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{ .mask = MAX77541_BIT_TOPSYS_INT_TSHDN },
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{ .mask = MAX77541_BIT_TOPSYS_INT_UVLO },
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{ .mask = MAX77541_BIT_TOPSYS_INT_ALT_SWO },
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{ .mask = MAX77541_BIT_TOPSYS_INT_EXT_FREQ_DET },
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};
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static const struct regmap_irq_chip max77541_topsys_irq_chip = {
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.name = "max77541-topsys",
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.status_base = MAX77541_REG_TOPSYS_INT,
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.mask_base = MAX77541_REG_TOPSYS_INT_M,
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.num_regs = 1,
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.irqs = max77541_topsys_irqs,
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.num_irqs = ARRAY_SIZE(max77541_topsys_irqs),
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};
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static const struct regmap_irq max77541_buck_irqs[] = {
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{ .mask = MAX77541_BIT_BUCK_INT_M1_POK_FLT },
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{ .mask = MAX77541_BIT_BUCK_INT_M2_POK_FLT },
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{ .mask = MAX77541_BIT_BUCK_INT_M1_SCFLT },
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{ .mask = MAX77541_BIT_BUCK_INT_M2_SCFLT },
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};
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static const struct regmap_irq_chip max77541_buck_irq_chip = {
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.name = "max77541-buck",
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.status_base = MAX77541_REG_BUCK_INT,
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.mask_base = MAX77541_REG_BUCK_INT_M,
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.num_regs = 1,
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.irqs = max77541_buck_irqs,
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.num_irqs = ARRAY_SIZE(max77541_buck_irqs),
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};
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static const struct regmap_irq max77541_adc_irqs[] = {
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{ .mask = MAX77541_BIT_ADC_INT_CH1_I },
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{ .mask = MAX77541_BIT_ADC_INT_CH2_I },
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{ .mask = MAX77541_BIT_ADC_INT_CH3_I },
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{ .mask = MAX77541_BIT_ADC_INT_CH6_I },
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};
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static const struct regmap_irq_chip max77541_adc_irq_chip = {
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.name = "max77541-adc",
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.status_base = MAX77541_REG_ADC_INT,
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.mask_base = MAX77541_REG_ADC_INT_M,
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.num_regs = 1,
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.irqs = max77541_adc_irqs,
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.num_irqs = ARRAY_SIZE(max77541_adc_irqs),
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};
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static const struct mfd_cell max77540_devs[] = {
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MFD_CELL_OF("max77540-regulator", NULL, NULL, 0, 0, NULL),
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};
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static const struct mfd_cell max77541_devs[] = {
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MFD_CELL_OF("max77541-regulator", NULL, NULL, 0, 0, NULL),
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MFD_CELL_OF("max77541-adc", NULL, NULL, 0, 0, NULL),
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};
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static int max77541_pmic_irq_init(struct device *dev)
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{
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struct max77541 *max77541 = dev_get_drvdata(dev);
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int irq = max77541->i2c->irq;
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int ret;
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ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
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IRQF_ONESHOT | IRQF_SHARED, 0,
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&max77541_src_irq_chip,
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&max77541->irq_data);
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if (ret)
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return ret;
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ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
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IRQF_ONESHOT | IRQF_SHARED, 0,
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&max77541_topsys_irq_chip,
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&max77541->irq_topsys);
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if (ret)
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return ret;
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ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
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IRQF_ONESHOT | IRQF_SHARED, 0,
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&max77541_buck_irq_chip,
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&max77541->irq_buck);
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if (ret)
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return ret;
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if (max77541->id == MAX77541) {
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ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
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IRQF_ONESHOT | IRQF_SHARED, 0,
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&max77541_adc_irq_chip,
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&max77541->irq_adc);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int max77541_pmic_setup(struct device *dev)
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{
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struct max77541 *max77541 = dev_get_drvdata(dev);
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const struct mfd_cell *cells;
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int n_devs;
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int ret;
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switch (max77541->id) {
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case MAX77540:
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cells = max77540_devs;
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n_devs = ARRAY_SIZE(max77540_devs);
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break;
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case MAX77541:
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cells = max77541_devs;
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n_devs = ARRAY_SIZE(max77541_devs);
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break;
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default:
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return -EINVAL;
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}
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ret = max77541_pmic_irq_init(dev);
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if (ret)
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return dev_err_probe(dev, ret, "Failed to initialize IRQ\n");
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ret = device_init_wakeup(dev, true);
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if (ret)
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return dev_err_probe(dev, ret, "Unable to init wakeup\n");
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return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
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cells, n_devs, NULL, 0, NULL);
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}
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static int max77541_probe(struct i2c_client *client)
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{
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const struct i2c_device_id *id = i2c_client_get_device_id(client);
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struct device *dev = &client->dev;
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struct max77541 *max77541;
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max77541 = devm_kzalloc(dev, sizeof(*max77541), GFP_KERNEL);
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if (!max77541)
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return -ENOMEM;
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i2c_set_clientdata(client, max77541);
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max77541->i2c = client;
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max77541->id = (enum max7754x_ids)device_get_match_data(dev);
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if (!max77541->id)
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max77541->id = (enum max7754x_ids)id->driver_data;
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if (!max77541->id)
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return -EINVAL;
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max77541->regmap = devm_regmap_init_i2c(client,
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&max77541_regmap_config);
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if (IS_ERR(max77541->regmap))
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return dev_err_probe(dev, PTR_ERR(max77541->regmap),
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"Failed to allocate register map\n");
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return max77541_pmic_setup(dev);
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}
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static const struct of_device_id max77541_of_id[] = {
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{
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.compatible = "adi,max77540",
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.data = (void *)MAX77540,
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},
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{
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.compatible = "adi,max77541",
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.data = (void *)MAX77541,
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},
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{ }
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};
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MODULE_DEVICE_TABLE(of, max77541_of_id);
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static const struct i2c_device_id max77541_id[] = {
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{ "max77540", MAX77540 },
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{ "max77541", MAX77541 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max77541_id);
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static struct i2c_driver max77541_driver = {
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.driver = {
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.name = "max77541",
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.of_match_table = max77541_of_id,
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},
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.probe_new = max77541_probe,
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.id_table = max77541_id,
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};
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module_i2c_driver(max77541_driver);
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MODULE_DESCRIPTION("MAX7740/MAX7741 Driver");
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MODULE_AUTHOR("Okan Sahin <okan.sahin@analog.com>");
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MODULE_LICENSE("GPL");

‎include/linux/mfd/max77541.h‎

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/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef __MFD_MAX77541_H
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#define __MFD_MAX77541_H
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#include <linux/bits.h>
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#include <linux/types.h>
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/* REGISTERS */
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#define MAX77541_REG_INT_SRC 0x00
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#define MAX77541_REG_INT_SRC_M 0x01
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#define MAX77541_BIT_INT_SRC_TOPSYS BIT(0)
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#define MAX77541_BIT_INT_SRC_BUCK BIT(1)
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#define MAX77541_REG_TOPSYS_INT 0x02
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#define MAX77541_REG_TOPSYS_INT_M 0x03
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#define MAX77541_BIT_TOPSYS_INT_TJ_120C BIT(0)
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#define MAX77541_BIT_TOPSYS_INT_TJ_140C BIT(1)
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#define MAX77541_BIT_TOPSYS_INT_TSHDN BIT(2)
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#define MAX77541_BIT_TOPSYS_INT_UVLO BIT(3)
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#define MAX77541_BIT_TOPSYS_INT_ALT_SWO BIT(4)
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#define MAX77541_BIT_TOPSYS_INT_EXT_FREQ_DET BIT(5)
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/* REGULATORS */
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#define MAX77541_REG_BUCK_INT 0x20
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#define MAX77541_REG_BUCK_INT_M 0x21
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#define MAX77541_BIT_BUCK_INT_M1_POK_FLT BIT(0)
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#define MAX77541_BIT_BUCK_INT_M2_POK_FLT BIT(1)
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#define MAX77541_BIT_BUCK_INT_M1_SCFLT BIT(4)
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#define MAX77541_BIT_BUCK_INT_M2_SCFLT BIT(5)
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#define MAX77541_REG_EN_CTRL 0x0B
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#define MAX77541_BIT_M1_EN BIT(0)
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#define MAX77541_BIT_M2_EN BIT(1)
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#define MAX77541_REG_M1_VOUT 0x23
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#define MAX77541_REG_M2_VOUT 0x33
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#define MAX77541_BITS_MX_VOUT GENMASK(7, 0)
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#define MAX77541_REG_M1_CFG1 0x25
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#define MAX77541_REG_M2_CFG1 0x35
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#define MAX77541_BITS_MX_CFG1_RNG GENMASK(7, 6)
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/* ADC */
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#define MAX77541_REG_ADC_INT 0x70
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#define MAX77541_REG_ADC_INT_M 0x71
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#define MAX77541_BIT_ADC_INT_CH1_I BIT(0)
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#define MAX77541_BIT_ADC_INT_CH2_I BIT(1)
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#define MAX77541_BIT_ADC_INT_CH3_I BIT(2)
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#define MAX77541_BIT_ADC_INT_CH6_I BIT(5)
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#define MAX77541_REG_ADC_DATA_CH1 0x72
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#define MAX77541_REG_ADC_DATA_CH2 0x73
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#define MAX77541_REG_ADC_DATA_CH3 0x74
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#define MAX77541_REG_ADC_DATA_CH6 0x77
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/* INTERRUPT MASKS*/
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#define MAX77541_REG_INT_SRC_MASK 0x00
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#define MAX77541_REG_TOPSYS_INT_MASK 0x00
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#define MAX77541_REG_BUCK_INT_MASK 0x00
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#define MAX77541_MAX_REGULATORS 2
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enum max7754x_ids {
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MAX77540 = 1,
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MAX77541,
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};
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struct regmap;
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struct regmap_irq_chip_data;
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struct i2c_client;
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struct max77541 {
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struct i2c_client *i2c;
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struct regmap *regmap;
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enum max7754x_ids id;
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struct regmap_irq_chip_data *irq_data;
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struct regmap_irq_chip_data *irq_buck;
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struct regmap_irq_chip_data *irq_topsys;
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struct regmap_irq_chip_data *irq_adc;
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};
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#endif /* __MFD_MAX77541_H */

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