1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2022 Analog Devices, Inc. 4 * Driver for the MAX77540 and MAX77541 5 */ 6 7 #include <linux/i2c.h> 8 #include <linux/interrupt.h> 9 #include <linux/mfd/core.h> 10 #include <linux/mfd/max77541.h> 11 #include <linux/property.h> 12 #include <linux/regmap.h> 13 14 static const struct regmap_config max77541_regmap_config = { 15 .reg_bits = 8, 16 .val_bits = 8, 17 }; 18 19 static const struct regmap_irq max77541_src_irqs[] = { 20 { .mask = MAX77541_BIT_INT_SRC_TOPSYS }, 21 { .mask = MAX77541_BIT_INT_SRC_BUCK }, 22 }; 23 24 static const struct regmap_irq_chip max77541_src_irq_chip = { 25 .name = "max77541-src", 26 .status_base = MAX77541_REG_INT_SRC, 27 .mask_base = MAX77541_REG_INT_SRC_M, 28 .num_regs = 1, 29 .irqs = max77541_src_irqs, 30 .num_irqs = ARRAY_SIZE(max77541_src_irqs), 31 }; 32 33 static const struct regmap_irq max77541_topsys_irqs[] = { 34 { .mask = MAX77541_BIT_TOPSYS_INT_TJ_120C }, 35 { .mask = MAX77541_BIT_TOPSYS_INT_TJ_140C }, 36 { .mask = MAX77541_BIT_TOPSYS_INT_TSHDN }, 37 { .mask = MAX77541_BIT_TOPSYS_INT_UVLO }, 38 { .mask = MAX77541_BIT_TOPSYS_INT_ALT_SWO }, 39 { .mask = MAX77541_BIT_TOPSYS_INT_EXT_FREQ_DET }, 40 }; 41 42 static const struct regmap_irq_chip max77541_topsys_irq_chip = { 43 .name = "max77541-topsys", 44 .status_base = MAX77541_REG_TOPSYS_INT, 45 .mask_base = MAX77541_REG_TOPSYS_INT_M, 46 .num_regs = 1, 47 .irqs = max77541_topsys_irqs, 48 .num_irqs = ARRAY_SIZE(max77541_topsys_irqs), 49 }; 50 51 static const struct regmap_irq max77541_buck_irqs[] = { 52 { .mask = MAX77541_BIT_BUCK_INT_M1_POK_FLT }, 53 { .mask = MAX77541_BIT_BUCK_INT_M2_POK_FLT }, 54 { .mask = MAX77541_BIT_BUCK_INT_M1_SCFLT }, 55 { .mask = MAX77541_BIT_BUCK_INT_M2_SCFLT }, 56 }; 57 58 static const struct regmap_irq_chip max77541_buck_irq_chip = { 59 .name = "max77541-buck", 60 .status_base = MAX77541_REG_BUCK_INT, 61 .mask_base = MAX77541_REG_BUCK_INT_M, 62 .num_regs = 1, 63 .irqs = max77541_buck_irqs, 64 .num_irqs = ARRAY_SIZE(max77541_buck_irqs), 65 }; 66 67 static const struct regmap_irq max77541_adc_irqs[] = { 68 { .mask = MAX77541_BIT_ADC_INT_CH1_I }, 69 { .mask = MAX77541_BIT_ADC_INT_CH2_I }, 70 { .mask = MAX77541_BIT_ADC_INT_CH3_I }, 71 { .mask = MAX77541_BIT_ADC_INT_CH6_I }, 72 }; 73 74 static const struct regmap_irq_chip max77541_adc_irq_chip = { 75 .name = "max77541-adc", 76 .status_base = MAX77541_REG_ADC_INT, 77 .mask_base = MAX77541_REG_ADC_INT_M, 78 .num_regs = 1, 79 .irqs = max77541_adc_irqs, 80 .num_irqs = ARRAY_SIZE(max77541_adc_irqs), 81 }; 82 83 static const struct mfd_cell max77540_devs[] = { 84 MFD_CELL_OF("max77540-regulator", NULL, NULL, 0, 0, NULL), 85 }; 86 87 static const struct mfd_cell max77541_devs[] = { 88 MFD_CELL_OF("max77541-regulator", NULL, NULL, 0, 0, NULL), 89 MFD_CELL_OF("max77541-adc", NULL, NULL, 0, 0, NULL), 90 }; 91 92 static int max77541_pmic_irq_init(struct device *dev) 93 { 94 struct max77541 *max77541 = dev_get_drvdata(dev); 95 int irq = max77541->i2c->irq; 96 int ret; 97 98 ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq, 99 IRQF_ONESHOT | IRQF_SHARED, 0, 100 &max77541_src_irq_chip, 101 &max77541->irq_data); 102 if (ret) 103 return ret; 104 105 ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq, 106 IRQF_ONESHOT | IRQF_SHARED, 0, 107 &max77541_topsys_irq_chip, 108 &max77541->irq_topsys); 109 if (ret) 110 return ret; 111 112 ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq, 113 IRQF_ONESHOT | IRQF_SHARED, 0, 114 &max77541_buck_irq_chip, 115 &max77541->irq_buck); 116 if (ret) 117 return ret; 118 119 if (max77541->id == MAX77541) { 120 ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq, 121 IRQF_ONESHOT | IRQF_SHARED, 0, 122 &max77541_adc_irq_chip, 123 &max77541->irq_adc); 124 if (ret) 125 return ret; 126 } 127 128 return 0; 129 } 130 131 static int max77541_pmic_setup(struct device *dev) 132 { 133 struct max77541 *max77541 = dev_get_drvdata(dev); 134 const struct mfd_cell *cells; 135 int n_devs; 136 int ret; 137 138 switch (max77541->id) { 139 case MAX77540: 140 cells = max77540_devs; 141 n_devs = ARRAY_SIZE(max77540_devs); 142 break; 143 case MAX77541: 144 cells = max77541_devs; 145 n_devs = ARRAY_SIZE(max77541_devs); 146 break; 147 default: 148 return -EINVAL; 149 } 150 151 ret = max77541_pmic_irq_init(dev); 152 if (ret) 153 return dev_err_probe(dev, ret, "Failed to initialize IRQ\n"); 154 155 ret = device_init_wakeup(dev, true); 156 if (ret) 157 return dev_err_probe(dev, ret, "Unable to init wakeup\n"); 158 159 return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, 160 cells, n_devs, NULL, 0, NULL); 161 } 162 163 static int max77541_probe(struct i2c_client *client) 164 { 165 struct device *dev = &client->dev; 166 struct max77541 *max77541; 167 168 max77541 = devm_kzalloc(dev, sizeof(*max77541), GFP_KERNEL); 169 if (!max77541) 170 return -ENOMEM; 171 172 i2c_set_clientdata(client, max77541); 173 max77541->i2c = client; 174 175 max77541->id = (uintptr_t)i2c_get_match_data(client); 176 if (!max77541->id) 177 return -EINVAL; 178 179 max77541->regmap = devm_regmap_init_i2c(client, 180 &max77541_regmap_config); 181 if (IS_ERR(max77541->regmap)) 182 return dev_err_probe(dev, PTR_ERR(max77541->regmap), 183 "Failed to allocate register map\n"); 184 185 return max77541_pmic_setup(dev); 186 } 187 188 static const struct of_device_id max77541_of_id[] = { 189 { 190 .compatible = "adi,max77540", 191 .data = (void *)MAX77540, 192 }, 193 { 194 .compatible = "adi,max77541", 195 .data = (void *)MAX77541, 196 }, 197 { } 198 }; 199 MODULE_DEVICE_TABLE(of, max77541_of_id); 200 201 static const struct i2c_device_id max77541_id[] = { 202 { "max77540", MAX77540 }, 203 { "max77541", MAX77541 }, 204 { } 205 }; 206 MODULE_DEVICE_TABLE(i2c, max77541_id); 207 208 static struct i2c_driver max77541_driver = { 209 .driver = { 210 .name = "max77541", 211 .of_match_table = max77541_of_id, 212 }, 213 .probe = max77541_probe, 214 .id_table = max77541_id, 215 }; 216 module_i2c_driver(max77541_driver); 217 218 MODULE_DESCRIPTION("MAX7740/MAX7741 Driver"); 219 MODULE_AUTHOR("Okan Sahin <okan.sahin@analog.com>"); 220 MODULE_LICENSE("GPL"); 221