diff options
Diffstat (limited to 'drivers/mfd/max77541.c')
| -rw-r--r-- | drivers/mfd/max77541.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/drivers/mfd/max77541.c b/drivers/mfd/max77541.c new file mode 100644 index 000000000..10c2e274b --- /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 = (uintptr_t)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 = 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"); |