1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Core driver for TI TPS65090 PMIC family 4 * 5 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. 6 * 7 * Author: Venu Byravarasu <vbyravarasu@nvidia.com> 8 */ 9 10 #include <linux/interrupt.h> 11 #include <linux/irq.h> 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/mutex.h> 15 #include <linux/slab.h> 16 #include <linux/i2c.h> 17 #include <linux/mfd/core.h> 18 #include <linux/mfd/tps65090.h> 19 #include <linux/of.h> 20 #include <linux/of_device.h> 21 #include <linux/err.h> 22 23 #define NUM_INT_REG 2 24 25 #define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1 26 #define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2 27 #define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3 28 #define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4 29 #define TPS65090_INT1_MASK_CHARGING_COMPLETE 5 30 #define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6 31 #define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7 32 #define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0 33 #define TPS65090_INT2_MASK_OVERLOAD_FET1 1 34 #define TPS65090_INT2_MASK_OVERLOAD_FET2 2 35 #define TPS65090_INT2_MASK_OVERLOAD_FET3 3 36 #define TPS65090_INT2_MASK_OVERLOAD_FET4 4 37 #define TPS65090_INT2_MASK_OVERLOAD_FET5 5 38 #define TPS65090_INT2_MASK_OVERLOAD_FET6 6 39 #define TPS65090_INT2_MASK_OVERLOAD_FET7 7 40 41 static struct resource charger_resources[] = { 42 { 43 .start = TPS65090_IRQ_VAC_STATUS_CHANGE, 44 .end = TPS65090_IRQ_VAC_STATUS_CHANGE, 45 .flags = IORESOURCE_IRQ, 46 } 47 }; 48 49 enum tps65090_cells { 50 PMIC = 0, 51 CHARGER = 1, 52 }; 53 54 static struct mfd_cell tps65090s[] = { 55 [PMIC] = { 56 .name = "tps65090-pmic", 57 }, 58 [CHARGER] = { 59 .name = "tps65090-charger", 60 .num_resources = ARRAY_SIZE(charger_resources), 61 .resources = &charger_resources[0], 62 .of_compatible = "ti,tps65090-charger", 63 }, 64 }; 65 66 static const struct regmap_irq tps65090_irqs[] = { 67 /* INT1 IRQs*/ 68 [TPS65090_IRQ_VAC_STATUS_CHANGE] = { 69 .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE, 70 }, 71 [TPS65090_IRQ_VSYS_STATUS_CHANGE] = { 72 .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE, 73 }, 74 [TPS65090_IRQ_BAT_STATUS_CHANGE] = { 75 .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE, 76 }, 77 [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = { 78 .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE, 79 }, 80 [TPS65090_IRQ_CHARGING_COMPLETE] = { 81 .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE, 82 }, 83 [TPS65090_IRQ_OVERLOAD_DCDC1] = { 84 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1, 85 }, 86 [TPS65090_IRQ_OVERLOAD_DCDC2] = { 87 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2, 88 }, 89 /* INT2 IRQs*/ 90 [TPS65090_IRQ_OVERLOAD_DCDC3] = { 91 .reg_offset = 1, 92 .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3, 93 }, 94 [TPS65090_IRQ_OVERLOAD_FET1] = { 95 .reg_offset = 1, 96 .mask = TPS65090_INT2_MASK_OVERLOAD_FET1, 97 }, 98 [TPS65090_IRQ_OVERLOAD_FET2] = { 99 .reg_offset = 1, 100 .mask = TPS65090_INT2_MASK_OVERLOAD_FET2, 101 }, 102 [TPS65090_IRQ_OVERLOAD_FET3] = { 103 .reg_offset = 1, 104 .mask = TPS65090_INT2_MASK_OVERLOAD_FET3, 105 }, 106 [TPS65090_IRQ_OVERLOAD_FET4] = { 107 .reg_offset = 1, 108 .mask = TPS65090_INT2_MASK_OVERLOAD_FET4, 109 }, 110 [TPS65090_IRQ_OVERLOAD_FET5] = { 111 .reg_offset = 1, 112 .mask = TPS65090_INT2_MASK_OVERLOAD_FET5, 113 }, 114 [TPS65090_IRQ_OVERLOAD_FET6] = { 115 .reg_offset = 1, 116 .mask = TPS65090_INT2_MASK_OVERLOAD_FET6, 117 }, 118 [TPS65090_IRQ_OVERLOAD_FET7] = { 119 .reg_offset = 1, 120 .mask = TPS65090_INT2_MASK_OVERLOAD_FET7, 121 }, 122 }; 123 124 static struct regmap_irq_chip tps65090_irq_chip = { 125 .name = "tps65090", 126 .irqs = tps65090_irqs, 127 .num_irqs = ARRAY_SIZE(tps65090_irqs), 128 .num_regs = NUM_INT_REG, 129 .status_base = TPS65090_REG_INTR_STS, 130 .mask_base = TPS65090_REG_INTR_MASK, 131 .mask_invert = true, 132 }; 133 134 static bool is_volatile_reg(struct device *dev, unsigned int reg) 135 { 136 /* Nearly all registers have status bits mixed in, except a few */ 137 switch (reg) { 138 case TPS65090_REG_INTR_MASK: 139 case TPS65090_REG_INTR_MASK2: 140 case TPS65090_REG_CG_CTRL0: 141 case TPS65090_REG_CG_CTRL1: 142 case TPS65090_REG_CG_CTRL2: 143 case TPS65090_REG_CG_CTRL3: 144 case TPS65090_REG_CG_CTRL4: 145 case TPS65090_REG_CG_CTRL5: 146 return false; 147 } 148 return true; 149 } 150 151 static const struct regmap_config tps65090_regmap_config = { 152 .reg_bits = 8, 153 .val_bits = 8, 154 .max_register = TPS65090_MAX_REG, 155 .num_reg_defaults_raw = TPS65090_NUM_REGS, 156 .cache_type = REGCACHE_RBTREE, 157 .volatile_reg = is_volatile_reg, 158 }; 159 160 #ifdef CONFIG_OF 161 static const struct of_device_id tps65090_of_match[] = { 162 { .compatible = "ti,tps65090",}, 163 {}, 164 }; 165 #endif 166 167 static int tps65090_i2c_probe(struct i2c_client *client, 168 const struct i2c_device_id *id) 169 { 170 struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev); 171 int irq_base = 0; 172 struct tps65090 *tps65090; 173 int ret; 174 175 if (!pdata && !client->dev.of_node) { 176 dev_err(&client->dev, 177 "tps65090 requires platform data or of_node\n"); 178 return -EINVAL; 179 } 180 181 if (pdata) 182 irq_base = pdata->irq_base; 183 184 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL); 185 if (!tps65090) 186 return -ENOMEM; 187 188 tps65090->dev = &client->dev; 189 i2c_set_clientdata(client, tps65090); 190 191 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config); 192 if (IS_ERR(tps65090->rmap)) { 193 ret = PTR_ERR(tps65090->rmap); 194 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret); 195 return ret; 196 } 197 198 if (client->irq) { 199 ret = regmap_add_irq_chip(tps65090->rmap, client->irq, 200 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base, 201 &tps65090_irq_chip, &tps65090->irq_data); 202 if (ret) { 203 dev_err(&client->dev, 204 "IRQ init failed with err: %d\n", ret); 205 return ret; 206 } 207 } else { 208 /* Don't tell children they have an IRQ that'll never fire */ 209 tps65090s[CHARGER].num_resources = 0; 210 } 211 212 ret = mfd_add_devices(tps65090->dev, -1, tps65090s, 213 ARRAY_SIZE(tps65090s), NULL, 214 0, regmap_irq_get_domain(tps65090->irq_data)); 215 if (ret) { 216 dev_err(&client->dev, "add mfd devices failed with err: %d\n", 217 ret); 218 goto err_irq_exit; 219 } 220 221 return 0; 222 223 err_irq_exit: 224 if (client->irq) 225 regmap_del_irq_chip(client->irq, tps65090->irq_data); 226 return ret; 227 } 228 229 230 static const struct i2c_device_id tps65090_id_table[] = { 231 { "tps65090", 0 }, 232 { }, 233 }; 234 235 static struct i2c_driver tps65090_driver = { 236 .driver = { 237 .name = "tps65090", 238 .suppress_bind_attrs = true, 239 .of_match_table = of_match_ptr(tps65090_of_match), 240 }, 241 .probe = tps65090_i2c_probe, 242 .id_table = tps65090_id_table, 243 }; 244 245 static int __init tps65090_init(void) 246 { 247 return i2c_add_driver(&tps65090_driver); 248 } 249 subsys_initcall(tps65090_init); 250