diff options
Diffstat (limited to 'drivers/mfd/max77693.c')
| -rw-r--r-- | drivers/mfd/max77693.c | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/drivers/mfd/max77693.c b/drivers/mfd/max77693.c new file mode 100644 index 000000000..cb14afa97 --- /dev/null +++ b/drivers/mfd/max77693.c @@ -0,0 +1,399 @@ +/* + * max77693.c - mfd core driver for the MAX 77693 + * + * Copyright (C) 2012 Samsung Electronics + * SangYoung Son <hello.son@smasung.com> + * + * This program is not provided / owned by Maxim Integrated Products. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * This driver is based on max8997.c + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/of.h> +#include <linux/pm_runtime.h> +#include <linux/mutex.h> +#include <linux/mfd/core.h> +#include <linux/mfd/max77693.h> +#include <linux/mfd/max77693-private.h> +#include <linux/regulator/machine.h> +#include <linux/regmap.h> + +#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */ +#define I2C_ADDR_MUIC (0x4A >> 1) +#define I2C_ADDR_HAPTIC (0x90 >> 1) + +static const struct mfd_cell max77693_devs[] = { + { .name = "max77693-pmic", }, + { + .name = "max77693-charger", + .of_compatible = "maxim,max77693-charger", + }, + { .name = "max77693-muic", }, + { + .name = "max77693-haptic", + .of_compatible = "maxim,max77693-haptic", + }, + { + .name = "max77693-led", + .of_compatible = "maxim,max77693-led", + }, +}; + +static const struct regmap_config max77693_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = MAX77693_PMIC_REG_END, +}; + +static const struct regmap_irq max77693_led_irqs[] = { + { .mask = LED_IRQ_FLED2_OPEN, }, + { .mask = LED_IRQ_FLED2_SHORT, }, + { .mask = LED_IRQ_FLED1_OPEN, }, + { .mask = LED_IRQ_FLED1_SHORT, }, + { .mask = LED_IRQ_MAX_FLASH, }, +}; + +static const struct regmap_irq_chip max77693_led_irq_chip = { + .name = "max77693-led", + .status_base = MAX77693_LED_REG_FLASH_INT, + .mask_base = MAX77693_LED_REG_FLASH_INT_MASK, + .mask_invert = false, + .num_regs = 1, + .irqs = max77693_led_irqs, + .num_irqs = ARRAY_SIZE(max77693_led_irqs), +}; + +static const struct regmap_irq max77693_topsys_irqs[] = { + { .mask = TOPSYS_IRQ_T120C_INT, }, + { .mask = TOPSYS_IRQ_T140C_INT, }, + { .mask = TOPSYS_IRQ_LOWSYS_INT, }, +}; + +static const struct regmap_irq_chip max77693_topsys_irq_chip = { + .name = "max77693-topsys", + .status_base = MAX77693_PMIC_REG_TOPSYS_INT, + .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK, + .mask_invert = false, + .num_regs = 1, + .irqs = max77693_topsys_irqs, + .num_irqs = ARRAY_SIZE(max77693_topsys_irqs), +}; + +static const struct regmap_irq max77693_charger_irqs[] = { + { .mask = CHG_IRQ_BYP_I, }, + { .mask = CHG_IRQ_THM_I, }, + { .mask = CHG_IRQ_BAT_I, }, + { .mask = CHG_IRQ_CHG_I, }, + { .mask = CHG_IRQ_CHGIN_I, }, +}; + +static const struct regmap_irq_chip max77693_charger_irq_chip = { + .name = "max77693-charger", + .status_base = MAX77693_CHG_REG_CHG_INT, + .mask_base = MAX77693_CHG_REG_CHG_INT_MASK, + .mask_invert = false, + .num_regs = 1, + .irqs = max77693_charger_irqs, + .num_irqs = ARRAY_SIZE(max77693_charger_irqs), +}; + +static const struct regmap_config max77693_regmap_muic_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = MAX77693_MUIC_REG_END, +}; + +static const struct regmap_irq max77693_muic_irqs[] = { + { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, }, + { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, }, + { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, }, + { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, }, + + { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, }, + { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, }, + { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, }, + { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, }, + { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, }, + { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, }, + + { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, }, + { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, }, + { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, }, + { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, }, + { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, }, + { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, }, +}; + +static const struct regmap_irq_chip max77693_muic_irq_chip = { + .name = "max77693-muic", + .status_base = MAX77693_MUIC_REG_INT1, + .mask_base = MAX77693_MUIC_REG_INTMASK1, + .mask_invert = true, + .num_regs = 3, + .irqs = max77693_muic_irqs, + .num_irqs = ARRAY_SIZE(max77693_muic_irqs), +}; + +static const struct regmap_config max77693_regmap_haptic_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = MAX77693_HAPTIC_REG_END, +}; + +static int max77693_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct max77693_dev *max77693; + unsigned int reg_data; + int ret = 0; + + max77693 = devm_kzalloc(&i2c->dev, + sizeof(struct max77693_dev), GFP_KERNEL); + if (max77693 == NULL) + return -ENOMEM; + + i2c_set_clientdata(i2c, max77693); + max77693->dev = &i2c->dev; + max77693->i2c = i2c; + max77693->irq = i2c->irq; + max77693->type = id->driver_data; + + max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config); + if (IS_ERR(max77693->regmap)) { + ret = PTR_ERR(max77693->regmap); + dev_err(max77693->dev, "failed to allocate register map: %d\n", + ret); + return ret; + } + + ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2, + ®_data); + if (ret < 0) { + dev_err(max77693->dev, "device not found on this channel\n"); + return ret; + } else + dev_info(max77693->dev, "device ID: 0x%x\n", reg_data); + + max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); + if (!max77693->muic) { + dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n"); + return -ENODEV; + } + i2c_set_clientdata(max77693->muic, max77693); + + max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); + if (!max77693->haptic) { + dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n"); + ret = -ENODEV; + goto err_i2c_haptic; + } + i2c_set_clientdata(max77693->haptic, max77693); + + max77693->regmap_haptic = devm_regmap_init_i2c(max77693->haptic, + &max77693_regmap_haptic_config); + if (IS_ERR(max77693->regmap_haptic)) { + ret = PTR_ERR(max77693->regmap_haptic); + dev_err(max77693->dev, + "failed to initialize haptic register map: %d\n", ret); + goto err_regmap; + } + + /* + * Initialize register map for MUIC device because use regmap-muic + * instance of MUIC device when irq of max77693 is initialized + * before call max77693-muic probe() function. + */ + max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic, + &max77693_regmap_muic_config); + if (IS_ERR(max77693->regmap_muic)) { + ret = PTR_ERR(max77693->regmap_muic); + dev_err(max77693->dev, + "failed to allocate register map: %d\n", ret); + goto err_regmap; + } + + ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, + IRQF_ONESHOT | IRQF_SHARED | + IRQF_TRIGGER_FALLING, 0, + &max77693_led_irq_chip, + &max77693->irq_data_led); + if (ret) { + dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); + goto err_regmap; + } + + ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, + IRQF_ONESHOT | IRQF_SHARED | + IRQF_TRIGGER_FALLING, 0, + &max77693_topsys_irq_chip, + &max77693->irq_data_topsys); + if (ret) { + dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); + goto err_irq_topsys; + } + + ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, + IRQF_ONESHOT | IRQF_SHARED | + IRQF_TRIGGER_FALLING, 0, + &max77693_charger_irq_chip, + &max77693->irq_data_charger); + if (ret) { + dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); + goto err_irq_charger; + } + + ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq, + IRQF_ONESHOT | IRQF_SHARED | + IRQF_TRIGGER_FALLING, 0, + &max77693_muic_irq_chip, + &max77693->irq_data_muic); + if (ret) { + dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); + goto err_irq_muic; + } + + /* Unmask interrupts from all blocks in interrupt source register */ + ret = regmap_update_bits(max77693->regmap, + MAX77693_PMIC_REG_INTSRC_MASK, + SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL); + if (ret < 0) { + dev_err(max77693->dev, + "Could not unmask interrupts in INTSRC: %d\n", + ret); + goto err_intsrc; + } + + pm_runtime_set_active(max77693->dev); + + ret = mfd_add_devices(max77693->dev, -1, max77693_devs, + ARRAY_SIZE(max77693_devs), NULL, 0, NULL); + if (ret < 0) + goto err_mfd; + + return ret; + +err_mfd: + mfd_remove_devices(max77693->dev); +err_intsrc: + regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); +err_irq_muic: + regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger); +err_irq_charger: + regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); +err_irq_topsys: + regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); +err_regmap: + i2c_unregister_device(max77693->haptic); +err_i2c_haptic: + i2c_unregister_device(max77693->muic); + return ret; +} + +static int max77693_i2c_remove(struct i2c_client *i2c) +{ + struct max77693_dev *max77693 = i2c_get_clientdata(i2c); + + mfd_remove_devices(max77693->dev); + + regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); + regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger); + regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); + regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); + + i2c_unregister_device(max77693->muic); + i2c_unregister_device(max77693->haptic); + + return 0; +} + +static const struct i2c_device_id max77693_i2c_id[] = { + { "max77693", TYPE_MAX77693 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); + +static int max77693_suspend(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max77693_dev *max77693 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) { + enable_irq_wake(max77693->irq); + disable_irq(max77693->irq); + } + + return 0; +} + +static int max77693_resume(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max77693_dev *max77693 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) { + disable_irq_wake(max77693->irq); + enable_irq(max77693->irq); + } + + return 0; +} + +static const struct dev_pm_ops max77693_pm = { + .suspend = max77693_suspend, + .resume = max77693_resume, +}; + +#ifdef CONFIG_OF +static const struct of_device_id max77693_dt_match[] = { + { .compatible = "maxim,max77693" }, + {}, +}; +#endif + +static struct i2c_driver max77693_i2c_driver = { + .driver = { + .name = "max77693", + .owner = THIS_MODULE, + .pm = &max77693_pm, + .of_match_table = of_match_ptr(max77693_dt_match), + }, + .probe = max77693_i2c_probe, + .remove = max77693_i2c_remove, + .id_table = max77693_i2c_id, +}; + +static int __init max77693_i2c_init(void) +{ + return i2c_add_driver(&max77693_i2c_driver); +} +/* init early so consumer devices can complete system boot */ +subsys_initcall(max77693_i2c_init); + +static void __exit max77693_i2c_exit(void) +{ + i2c_del_driver(&max77693_i2c_driver); +} +module_exit(max77693_i2c_exit); + +MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver"); +MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>"); +MODULE_LICENSE("GPL"); |