1 /* 2 * Core driver for TI TPS65090 PMIC family 3 * 4 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. 5 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2, as published by the Free Software Foundation. 9 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 15 * You should have received a copy of the GNU General Public License 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include <linux/interrupt.h> 20 #include <linux/irq.h> 21 #include <linux/kernel.h> 22 #include <linux/module.h> 23 #include <linux/mutex.h> 24 #include <linux/slab.h> 25 #include <linux/i2c.h> 26 #include <linux/mfd/core.h> 27 #include <linux/mfd/tps65090.h> 28 #include <linux/of.h> 29 #include <linux/of_device.h> 30 #include <linux/err.h> 31 32 #define NUM_INT_REG 2 33 #define TOTAL_NUM_REG 0x18 34 35 /* interrupt status registers */ 36 #define TPS65090_INT_STS 0x0 37 #define TPS65090_INT_STS2 0x1 38 39 /* interrupt mask registers */ 40 #define TPS65090_INT_MSK 0x2 41 #define TPS65090_INT_MSK2 0x3 42 43 #define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1 44 #define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2 45 #define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3 46 #define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4 47 #define TPS65090_INT1_MASK_CHARGING_COMPLETE 5 48 #define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6 49 #define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7 50 #define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0 51 #define TPS65090_INT2_MASK_OVERLOAD_FET1 1 52 #define TPS65090_INT2_MASK_OVERLOAD_FET2 2 53 #define TPS65090_INT2_MASK_OVERLOAD_FET3 3 54 #define TPS65090_INT2_MASK_OVERLOAD_FET4 4 55 #define TPS65090_INT2_MASK_OVERLOAD_FET5 5 56 #define TPS65090_INT2_MASK_OVERLOAD_FET6 6 57 #define TPS65090_INT2_MASK_OVERLOAD_FET7 7 58 59 static struct resource charger_resources[] = { 60 { 61 .start = TPS65090_IRQ_VAC_STATUS_CHANGE, 62 .end = TPS65090_IRQ_VAC_STATUS_CHANGE, 63 .flags = IORESOURCE_IRQ, 64 } 65 }; 66 67 enum tps65090_cells { 68 PMIC = 0, 69 CHARGER = 1, 70 }; 71 72 static struct mfd_cell tps65090s[] = { 73 [PMIC] = { 74 .name = "tps65090-pmic", 75 }, 76 [CHARGER] = { 77 .name = "tps65090-charger", 78 .num_resources = ARRAY_SIZE(charger_resources), 79 .resources = &charger_resources[0], 80 .of_compatible = "ti,tps65090-charger", 81 }, 82 }; 83 84 static const struct regmap_irq tps65090_irqs[] = { 85 /* INT1 IRQs*/ 86 [TPS65090_IRQ_VAC_STATUS_CHANGE] = { 87 .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE, 88 }, 89 [TPS65090_IRQ_VSYS_STATUS_CHANGE] = { 90 .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE, 91 }, 92 [TPS65090_IRQ_BAT_STATUS_CHANGE] = { 93 .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE, 94 }, 95 [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = { 96 .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE, 97 }, 98 [TPS65090_IRQ_CHARGING_COMPLETE] = { 99 .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE, 100 }, 101 [TPS65090_IRQ_OVERLOAD_DCDC1] = { 102 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1, 103 }, 104 [TPS65090_IRQ_OVERLOAD_DCDC2] = { 105 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2, 106 }, 107 /* INT2 IRQs*/ 108 [TPS65090_IRQ_OVERLOAD_DCDC3] = { 109 .reg_offset = 1, 110 .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3, 111 }, 112 [TPS65090_IRQ_OVERLOAD_FET1] = { 113 .reg_offset = 1, 114 .mask = TPS65090_INT2_MASK_OVERLOAD_FET1, 115 }, 116 [TPS65090_IRQ_OVERLOAD_FET2] = { 117 .reg_offset = 1, 118 .mask = TPS65090_INT2_MASK_OVERLOAD_FET2, 119 }, 120 [TPS65090_IRQ_OVERLOAD_FET3] = { 121 .reg_offset = 1, 122 .mask = TPS65090_INT2_MASK_OVERLOAD_FET3, 123 }, 124 [TPS65090_IRQ_OVERLOAD_FET4] = { 125 .reg_offset = 1, 126 .mask = TPS65090_INT2_MASK_OVERLOAD_FET4, 127 }, 128 [TPS65090_IRQ_OVERLOAD_FET5] = { 129 .reg_offset = 1, 130 .mask = TPS65090_INT2_MASK_OVERLOAD_FET5, 131 }, 132 [TPS65090_IRQ_OVERLOAD_FET6] = { 133 .reg_offset = 1, 134 .mask = TPS65090_INT2_MASK_OVERLOAD_FET6, 135 }, 136 [TPS65090_IRQ_OVERLOAD_FET7] = { 137 .reg_offset = 1, 138 .mask = TPS65090_INT2_MASK_OVERLOAD_FET7, 139 }, 140 }; 141 142 static struct regmap_irq_chip tps65090_irq_chip = { 143 .name = "tps65090", 144 .irqs = tps65090_irqs, 145 .num_irqs = ARRAY_SIZE(tps65090_irqs), 146 .num_regs = NUM_INT_REG, 147 .status_base = TPS65090_INT_STS, 148 .mask_base = TPS65090_INT_MSK, 149 .mask_invert = true, 150 }; 151 152 static bool is_volatile_reg(struct device *dev, unsigned int reg) 153 { 154 if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS2)) 155 return true; 156 else 157 return false; 158 } 159 160 static const struct regmap_config tps65090_regmap_config = { 161 .reg_bits = 8, 162 .val_bits = 8, 163 .max_register = TOTAL_NUM_REG, 164 .num_reg_defaults_raw = TOTAL_NUM_REG, 165 .cache_type = REGCACHE_RBTREE, 166 .volatile_reg = is_volatile_reg, 167 }; 168 169 #ifdef CONFIG_OF 170 static const struct of_device_id tps65090_of_match[] = { 171 { .compatible = "ti,tps65090",}, 172 {}, 173 }; 174 MODULE_DEVICE_TABLE(of, tps65090_of_match); 175 #endif 176 177 static int tps65090_i2c_probe(struct i2c_client *client, 178 const struct i2c_device_id *id) 179 { 180 struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev); 181 int irq_base = 0; 182 struct tps65090 *tps65090; 183 int ret; 184 185 if (!pdata && !client->dev.of_node) { 186 dev_err(&client->dev, 187 "tps65090 requires platform data or of_node\n"); 188 return -EINVAL; 189 } 190 191 if (pdata) 192 irq_base = pdata->irq_base; 193 194 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL); 195 if (!tps65090) { 196 dev_err(&client->dev, "mem alloc for tps65090 failed\n"); 197 return -ENOMEM; 198 } 199 200 tps65090->dev = &client->dev; 201 i2c_set_clientdata(client, tps65090); 202 203 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config); 204 if (IS_ERR(tps65090->rmap)) { 205 ret = PTR_ERR(tps65090->rmap); 206 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret); 207 return ret; 208 } 209 210 if (client->irq) { 211 ret = regmap_add_irq_chip(tps65090->rmap, client->irq, 212 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base, 213 &tps65090_irq_chip, &tps65090->irq_data); 214 if (ret) { 215 dev_err(&client->dev, 216 "IRQ init failed with err: %d\n", ret); 217 return ret; 218 } 219 } else { 220 /* Don't tell children they have an IRQ that'll never fire */ 221 tps65090s[CHARGER].num_resources = 0; 222 } 223 224 ret = mfd_add_devices(tps65090->dev, -1, tps65090s, 225 ARRAY_SIZE(tps65090s), NULL, 226 0, regmap_irq_get_domain(tps65090->irq_data)); 227 if (ret) { 228 dev_err(&client->dev, "add mfd devices failed with err: %d\n", 229 ret); 230 goto err_irq_exit; 231 } 232 233 return 0; 234 235 err_irq_exit: 236 if (client->irq) 237 regmap_del_irq_chip(client->irq, tps65090->irq_data); 238 return ret; 239 } 240 241 static int tps65090_i2c_remove(struct i2c_client *client) 242 { 243 struct tps65090 *tps65090 = i2c_get_clientdata(client); 244 245 mfd_remove_devices(tps65090->dev); 246 if (client->irq) 247 regmap_del_irq_chip(client->irq, tps65090->irq_data); 248 249 return 0; 250 } 251 252 static const struct i2c_device_id tps65090_id_table[] = { 253 { "tps65090", 0 }, 254 { }, 255 }; 256 MODULE_DEVICE_TABLE(i2c, tps65090_id_table); 257 258 static struct i2c_driver tps65090_driver = { 259 .driver = { 260 .name = "tps65090", 261 .owner = THIS_MODULE, 262 .of_match_table = of_match_ptr(tps65090_of_match), 263 }, 264 .probe = tps65090_i2c_probe, 265 .remove = tps65090_i2c_remove, 266 .id_table = tps65090_id_table, 267 }; 268 269 static int __init tps65090_init(void) 270 { 271 return i2c_add_driver(&tps65090_driver); 272 } 273 subsys_initcall(tps65090_init); 274 275 static void __exit tps65090_exit(void) 276 { 277 i2c_del_driver(&tps65090_driver); 278 } 279 module_exit(tps65090_exit); 280 281 MODULE_DESCRIPTION("TPS65090 core driver"); 282 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); 283 MODULE_LICENSE("GPL v2"); 284