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0001 // SPDX-License-Identifier: GPL-2.0+
0002 //
0003 // max77693.c - mfd core driver for the MAX 77693
0004 //
0005 // Copyright (C) 2012 Samsung Electronics
0006 // SangYoung Son <hello.son@samsung.com>
0007 //
0008 // This program is not provided / owned by Maxim Integrated Products.
0009 //
0010 // This driver is based on max8997.c
0011 
0012 #include <linux/module.h>
0013 #include <linux/slab.h>
0014 #include <linux/i2c.h>
0015 #include <linux/err.h>
0016 #include <linux/interrupt.h>
0017 #include <linux/of.h>
0018 #include <linux/pm_runtime.h>
0019 #include <linux/mutex.h>
0020 #include <linux/mfd/core.h>
0021 #include <linux/mfd/max77693.h>
0022 #include <linux/mfd/max77693-common.h>
0023 #include <linux/mfd/max77693-private.h>
0024 #include <linux/regulator/machine.h>
0025 #include <linux/regmap.h>
0026 
0027 #define I2C_ADDR_PMIC   (0xCC >> 1) /* Charger, Flash LED */
0028 #define I2C_ADDR_MUIC   (0x4A >> 1)
0029 #define I2C_ADDR_HAPTIC (0x90 >> 1)
0030 
0031 static const struct mfd_cell max77693_devs[] = {
0032     { .name = "max77693-pmic", },
0033     {
0034         .name = "max77693-charger",
0035         .of_compatible = "maxim,max77693-charger",
0036     },
0037     {
0038         .name = "max77693-muic",
0039         .of_compatible = "maxim,max77693-muic",
0040     },
0041     {
0042         .name = "max77693-haptic",
0043         .of_compatible = "maxim,max77693-haptic",
0044     },
0045     {
0046         .name = "max77693-led",
0047         .of_compatible = "maxim,max77693-led",
0048     },
0049 };
0050 
0051 static const struct regmap_config max77693_regmap_config = {
0052     .reg_bits = 8,
0053     .val_bits = 8,
0054     .max_register = MAX77693_PMIC_REG_END,
0055 };
0056 
0057 static const struct regmap_irq max77693_led_irqs[] = {
0058     { .mask = LED_IRQ_FLED2_OPEN,  },
0059     { .mask = LED_IRQ_FLED2_SHORT, },
0060     { .mask = LED_IRQ_FLED1_OPEN,  },
0061     { .mask = LED_IRQ_FLED1_SHORT, },
0062     { .mask = LED_IRQ_MAX_FLASH,   },
0063 };
0064 
0065 static const struct regmap_irq_chip max77693_led_irq_chip = {
0066     .name           = "max77693-led",
0067     .status_base        = MAX77693_LED_REG_FLASH_INT,
0068     .mask_base      = MAX77693_LED_REG_FLASH_INT_MASK,
0069     .mask_invert        = false,
0070     .num_regs       = 1,
0071     .irqs           = max77693_led_irqs,
0072     .num_irqs       = ARRAY_SIZE(max77693_led_irqs),
0073 };
0074 
0075 static const struct regmap_irq max77693_topsys_irqs[] = {
0076     { .mask = TOPSYS_IRQ_T120C_INT,  },
0077     { .mask = TOPSYS_IRQ_T140C_INT,  },
0078     { .mask = TOPSYS_IRQ_LOWSYS_INT, },
0079 };
0080 
0081 static const struct regmap_irq_chip max77693_topsys_irq_chip = {
0082     .name           = "max77693-topsys",
0083     .status_base        = MAX77693_PMIC_REG_TOPSYS_INT,
0084     .mask_base      = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
0085     .mask_invert        = false,
0086     .num_regs       = 1,
0087     .irqs           = max77693_topsys_irqs,
0088     .num_irqs       = ARRAY_SIZE(max77693_topsys_irqs),
0089 };
0090 
0091 static const struct regmap_irq max77693_charger_irqs[] = {
0092     { .mask = CHG_IRQ_BYP_I,   },
0093     { .mask = CHG_IRQ_THM_I,   },
0094     { .mask = CHG_IRQ_BAT_I,   },
0095     { .mask = CHG_IRQ_CHG_I,   },
0096     { .mask = CHG_IRQ_CHGIN_I, },
0097 };
0098 
0099 static const struct regmap_irq_chip max77693_charger_irq_chip = {
0100     .name           = "max77693-charger",
0101     .status_base        = MAX77693_CHG_REG_CHG_INT,
0102     .mask_base      = MAX77693_CHG_REG_CHG_INT_MASK,
0103     .mask_invert        = false,
0104     .num_regs       = 1,
0105     .irqs           = max77693_charger_irqs,
0106     .num_irqs       = ARRAY_SIZE(max77693_charger_irqs),
0107 };
0108 
0109 static const struct regmap_config max77693_regmap_muic_config = {
0110     .reg_bits = 8,
0111     .val_bits = 8,
0112     .max_register = MAX77693_MUIC_REG_END,
0113 };
0114 
0115 static const struct regmap_irq max77693_muic_irqs[] = {
0116     { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,       },
0117     { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,   },
0118     { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,   },
0119     { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,     },
0120 
0121     { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,    },
0122     { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,    },
0123     { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,    },
0124     { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,     },
0125     { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,    },
0126     { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,     },
0127 
0128     { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,       },
0129     { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,     },
0130     { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,       },
0131     { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,    },
0132     { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,   },
0133     { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,   },
0134 };
0135 
0136 static const struct regmap_irq_chip max77693_muic_irq_chip = {
0137     .name           = "max77693-muic",
0138     .status_base        = MAX77693_MUIC_REG_INT1,
0139     .mask_base      = MAX77693_MUIC_REG_INTMASK1,
0140     .mask_invert        = true,
0141     .num_regs       = 3,
0142     .irqs           = max77693_muic_irqs,
0143     .num_irqs       = ARRAY_SIZE(max77693_muic_irqs),
0144 };
0145 
0146 static const struct regmap_config max77693_regmap_haptic_config = {
0147     .reg_bits = 8,
0148     .val_bits = 8,
0149     .max_register = MAX77693_HAPTIC_REG_END,
0150 };
0151 
0152 static int max77693_i2c_probe(struct i2c_client *i2c,
0153                   const struct i2c_device_id *id)
0154 {
0155     struct max77693_dev *max77693;
0156     unsigned int reg_data;
0157     int ret = 0;
0158 
0159     max77693 = devm_kzalloc(&i2c->dev,
0160             sizeof(struct max77693_dev), GFP_KERNEL);
0161     if (max77693 == NULL)
0162         return -ENOMEM;
0163 
0164     i2c_set_clientdata(i2c, max77693);
0165     max77693->dev = &i2c->dev;
0166     max77693->i2c = i2c;
0167     max77693->irq = i2c->irq;
0168     max77693->type = id->driver_data;
0169 
0170     max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
0171     if (IS_ERR(max77693->regmap)) {
0172         ret = PTR_ERR(max77693->regmap);
0173         dev_err(max77693->dev, "failed to allocate register map: %d\n",
0174                 ret);
0175         return ret;
0176     }
0177 
0178     ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
0179                 &reg_data);
0180     if (ret < 0) {
0181         dev_err(max77693->dev, "device not found on this channel\n");
0182         return ret;
0183     } else
0184         dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
0185 
0186     max77693->i2c_muic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_MUIC);
0187     if (IS_ERR(max77693->i2c_muic)) {
0188         dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
0189         return PTR_ERR(max77693->i2c_muic);
0190     }
0191     i2c_set_clientdata(max77693->i2c_muic, max77693);
0192 
0193     max77693->i2c_haptic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_HAPTIC);
0194     if (IS_ERR(max77693->i2c_haptic)) {
0195         dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
0196         ret = PTR_ERR(max77693->i2c_haptic);
0197         goto err_i2c_haptic;
0198     }
0199     i2c_set_clientdata(max77693->i2c_haptic, max77693);
0200 
0201     max77693->regmap_haptic = devm_regmap_init_i2c(max77693->i2c_haptic,
0202                     &max77693_regmap_haptic_config);
0203     if (IS_ERR(max77693->regmap_haptic)) {
0204         ret = PTR_ERR(max77693->regmap_haptic);
0205         dev_err(max77693->dev,
0206             "failed to initialize haptic register map: %d\n", ret);
0207         goto err_regmap;
0208     }
0209 
0210     /*
0211      * Initialize register map for MUIC device because use regmap-muic
0212      * instance of MUIC device when irq of max77693 is initialized
0213      * before call max77693-muic probe() function.
0214      */
0215     max77693->regmap_muic = devm_regmap_init_i2c(max77693->i2c_muic,
0216                      &max77693_regmap_muic_config);
0217     if (IS_ERR(max77693->regmap_muic)) {
0218         ret = PTR_ERR(max77693->regmap_muic);
0219         dev_err(max77693->dev,
0220             "failed to allocate register map: %d\n", ret);
0221         goto err_regmap;
0222     }
0223 
0224     ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
0225                 IRQF_ONESHOT | IRQF_SHARED, 0,
0226                 &max77693_led_irq_chip,
0227                 &max77693->irq_data_led);
0228     if (ret) {
0229         dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
0230         goto err_regmap;
0231     }
0232 
0233     ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
0234                 IRQF_ONESHOT | IRQF_SHARED, 0,
0235                 &max77693_topsys_irq_chip,
0236                 &max77693->irq_data_topsys);
0237     if (ret) {
0238         dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
0239         goto err_irq_topsys;
0240     }
0241 
0242     ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
0243                 IRQF_ONESHOT | IRQF_SHARED, 0,
0244                 &max77693_charger_irq_chip,
0245                 &max77693->irq_data_chg);
0246     if (ret) {
0247         dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
0248         goto err_irq_charger;
0249     }
0250 
0251     ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
0252                 IRQF_ONESHOT | IRQF_SHARED, 0,
0253                 &max77693_muic_irq_chip,
0254                 &max77693->irq_data_muic);
0255     if (ret) {
0256         dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
0257         goto err_irq_muic;
0258     }
0259 
0260     /* Unmask interrupts from all blocks in interrupt source register */
0261     ret = regmap_update_bits(max77693->regmap,
0262                 MAX77693_PMIC_REG_INTSRC_MASK,
0263                 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
0264     if (ret < 0) {
0265         dev_err(max77693->dev,
0266             "Could not unmask interrupts in INTSRC: %d\n",
0267             ret);
0268         goto err_intsrc;
0269     }
0270 
0271     pm_runtime_set_active(max77693->dev);
0272 
0273     ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
0274                   ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
0275     if (ret < 0)
0276         goto err_mfd;
0277 
0278     return ret;
0279 
0280 err_mfd:
0281     mfd_remove_devices(max77693->dev);
0282 err_intsrc:
0283     regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
0284 err_irq_muic:
0285     regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
0286 err_irq_charger:
0287     regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
0288 err_irq_topsys:
0289     regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
0290 err_regmap:
0291     i2c_unregister_device(max77693->i2c_haptic);
0292 err_i2c_haptic:
0293     i2c_unregister_device(max77693->i2c_muic);
0294     return ret;
0295 }
0296 
0297 static int max77693_i2c_remove(struct i2c_client *i2c)
0298 {
0299     struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
0300 
0301     mfd_remove_devices(max77693->dev);
0302 
0303     regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
0304     regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
0305     regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
0306     regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
0307 
0308     i2c_unregister_device(max77693->i2c_muic);
0309     i2c_unregister_device(max77693->i2c_haptic);
0310 
0311     return 0;
0312 }
0313 
0314 static const struct i2c_device_id max77693_i2c_id[] = {
0315     { "max77693", TYPE_MAX77693 },
0316     { }
0317 };
0318 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
0319 
0320 static int max77693_suspend(struct device *dev)
0321 {
0322     struct i2c_client *i2c = to_i2c_client(dev);
0323     struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
0324 
0325     if (device_may_wakeup(dev)) {
0326         enable_irq_wake(max77693->irq);
0327         disable_irq(max77693->irq);
0328     }
0329 
0330     return 0;
0331 }
0332 
0333 static int max77693_resume(struct device *dev)
0334 {
0335     struct i2c_client *i2c = to_i2c_client(dev);
0336     struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
0337 
0338     if (device_may_wakeup(dev)) {
0339         disable_irq_wake(max77693->irq);
0340         enable_irq(max77693->irq);
0341     }
0342 
0343     return 0;
0344 }
0345 
0346 static const struct dev_pm_ops max77693_pm = {
0347     .suspend = max77693_suspend,
0348     .resume = max77693_resume,
0349 };
0350 
0351 #ifdef CONFIG_OF
0352 static const struct of_device_id max77693_dt_match[] = {
0353     { .compatible = "maxim,max77693" },
0354     {},
0355 };
0356 MODULE_DEVICE_TABLE(of, max77693_dt_match);
0357 #endif
0358 
0359 static struct i2c_driver max77693_i2c_driver = {
0360     .driver = {
0361            .name = "max77693",
0362            .pm = &max77693_pm,
0363            .of_match_table = of_match_ptr(max77693_dt_match),
0364     },
0365     .probe = max77693_i2c_probe,
0366     .remove = max77693_i2c_remove,
0367     .id_table = max77693_i2c_id,
0368 };
0369 
0370 module_i2c_driver(max77693_i2c_driver);
0371 
0372 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
0373 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
0374 MODULE_LICENSE("GPL");
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