Re: [PATCH v7 5/5] mfd: max77541: Add ADI MAX77541/MAX77540 PMIC Support

From: Andy Shevchenko
Date: Wed Apr 12 2023 - 09:41:26 EST

On Wed, Apr 12, 2023 at 02:12:46PM +0300, Okan Sahin wrote:
> 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.

Since Lee should be happy with your change for ID tables, I'm fine with the
rest and altogether.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>

> Signed-off-by: Okan Sahin <okan.sahin@xxxxxxxxxx>
> ---
> drivers/mfd/Kconfig | 13 ++
> drivers/mfd/Makefile | 1 +
> drivers/mfd/max77541.c | 224 +++++++++++++++++++++++++++++++++++
> include/linux/mfd/max77541.h | 91 ++++++++++++++
> 4 files changed, 329 insertions(+)
> create mode 100644 drivers/mfd/max77541.c
> create mode 100644 include/linux/mfd/max77541.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index fcc141e067b9..de89245ce1cb 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -777,6 +777,19 @@ 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
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 2f6c89d1e277..1c8540ddead6 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -151,6 +151,7 @@ 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
> diff --git a/drivers/mfd/max77541.c b/drivers/mfd/max77541.c
> new file mode 100644
> index 000000000000..4a3bad3493b3
> --- /dev/null
> +++ b/drivers/mfd/max77541.c
> @@ -0,0 +1,224 @@
> +// 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@xxxxxxxxxx>");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/mfd/max77541.h b/include/linux/mfd/max77541.h
> new file mode 100644
> index 000000000000..fe5c0a3dc637
> --- /dev/null
> +++ b/include/linux/mfd/max77541.h
> @@ -0,0 +1,91 @@
> +/* 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 */
> --
> 2.30.2
>

--
With Best Regards,
Andy Shevchenko