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 34 #define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1 35 #define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2 36 #define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3 37 #define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4 38 #define TPS65090_INT1_MASK_CHARGING_COMPLETE 5 39 #define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6 40 #define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7 41 #define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0 42 #define TPS65090_INT2_MASK_OVERLOAD_FET1 1 43 #define TPS65090_INT2_MASK_OVERLOAD_FET2 2 44 #define TPS65090_INT2_MASK_OVERLOAD_FET3 3 45 #define TPS65090_INT2_MASK_OVERLOAD_FET4 4 46 #define TPS65090_INT2_MASK_OVERLOAD_FET5 5 47 #define TPS65090_INT2_MASK_OVERLOAD_FET6 6 48 #define TPS65090_INT2_MASK_OVERLOAD_FET7 7 49 50 static struct resource charger_resources[] = { 51 { 52 .start = TPS65090_IRQ_VAC_STATUS_CHANGE, 53 .end = TPS65090_IRQ_VAC_STATUS_CHANGE, 54 .flags = IORESOURCE_IRQ, 55 } 56 }; 57 58 enum tps65090_cells { 59 PMIC = 0, 60 CHARGER = 1, 61 }; 62 63 static struct mfd_cell tps65090s[] = { 64 [PMIC] = { 65 .name = "tps65090-pmic", 66 }, 67 [CHARGER] = { 68 .name = "tps65090-charger", 69 .num_resources = ARRAY_SIZE(charger_resources), 70 .resources = &charger_resources[0], 71 .of_compatible = "ti,tps65090-charger", 72 }, 73 }; 74 75 static const struct regmap_irq tps65090_irqs[] = { 76 /* INT1 IRQs*/ 77 [TPS65090_IRQ_VAC_STATUS_CHANGE] = { 78 .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE, 79 }, 80 [TPS65090_IRQ_VSYS_STATUS_CHANGE] = { 81 .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE, 82 }, 83 [TPS65090_IRQ_BAT_STATUS_CHANGE] = { 84 .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE, 85 }, 86 [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = { 87 .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE, 88 }, 89 [TPS65090_IRQ_CHARGING_COMPLETE] = { 90 .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE, 91 }, 92 [TPS65090_IRQ_OVERLOAD_DCDC1] = { 93 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1, 94 }, 95 [TPS65090_IRQ_OVERLOAD_DCDC2] = { 96 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2, 97 }, 98 /* INT2 IRQs*/ 99 [TPS65090_IRQ_OVERLOAD_DCDC3] = { 100 .reg_offset = 1, 101 .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3, 102 }, 103 [TPS65090_IRQ_OVERLOAD_FET1] = { 104 .reg_offset = 1, 105 .mask = TPS65090_INT2_MASK_OVERLOAD_FET1, 106 }, 107 [TPS65090_IRQ_OVERLOAD_FET2] = { 108 .reg_offset = 1, 109 .mask = TPS65090_INT2_MASK_OVERLOAD_FET2, 110 }, 111 [TPS65090_IRQ_OVERLOAD_FET3] = { 112 .reg_offset = 1, 113 .mask = TPS65090_INT2_MASK_OVERLOAD_FET3, 114 }, 115 [TPS65090_IRQ_OVERLOAD_FET4] = { 116 .reg_offset = 1, 117 .mask = TPS65090_INT2_MASK_OVERLOAD_FET4, 118 }, 119 [TPS65090_IRQ_OVERLOAD_FET5] = { 120 .reg_offset = 1, 121 .mask = TPS65090_INT2_MASK_OVERLOAD_FET5, 122 }, 123 [TPS65090_IRQ_OVERLOAD_FET6] = { 124 .reg_offset = 1, 125 .mask = TPS65090_INT2_MASK_OVERLOAD_FET6, 126 }, 127 [TPS65090_IRQ_OVERLOAD_FET7] = { 128 .reg_offset = 1, 129 .mask = TPS65090_INT2_MASK_OVERLOAD_FET7, 130 }, 131 }; 132 133 static struct regmap_irq_chip tps65090_irq_chip = { 134 .name = "tps65090", 135 .irqs = tps65090_irqs, 136 .num_irqs = ARRAY_SIZE(tps65090_irqs), 137 .num_regs = NUM_INT_REG, 138 .status_base = TPS65090_REG_INTR_STS, 139 .mask_base = TPS65090_REG_INTR_MASK, 140 .mask_invert = true, 141 }; 142 143 static bool is_volatile_reg(struct device *dev, unsigned int reg) 144 { 145 /* Nearly all registers have status bits mixed in, except a few */ 146 switch (reg) { 147 case TPS65090_REG_INTR_MASK: 148 case TPS65090_REG_INTR_MASK2: 149 case TPS65090_REG_CG_CTRL0: 150 case TPS65090_REG_CG_CTRL1: 151 case TPS65090_REG_CG_CTRL2: 152 case TPS65090_REG_CG_CTRL3: 153 case TPS65090_REG_CG_CTRL4: 154 case TPS65090_REG_CG_CTRL5: 155 return false; 156 } 157 return true; 158 } 159 160 static const struct regmap_config tps65090_regmap_config = { 161 .reg_bits = 8, 162 .val_bits = 8, 163 .max_register = TPS65090_MAX_REG, 164 .num_reg_defaults_raw = TPS65090_NUM_REGS, 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 return -ENOMEM; 197 198 tps65090->dev = &client->dev; 199 i2c_set_clientdata(client, tps65090); 200 201 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config); 202 if (IS_ERR(tps65090->rmap)) { 203 ret = PTR_ERR(tps65090->rmap); 204 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret); 205 return ret; 206 } 207 208 if (client->irq) { 209 ret = regmap_add_irq_chip(tps65090->rmap, client->irq, 210 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base, 211 &tps65090_irq_chip, &tps65090->irq_data); 212 if (ret) { 213 dev_err(&client->dev, 214 "IRQ init failed with err: %d\n", ret); 215 return ret; 216 } 217 } else { 218 /* Don't tell children they have an IRQ that'll never fire */ 219 tps65090s[CHARGER].num_resources = 0; 220 } 221 222 ret = mfd_add_devices(tps65090->dev, -1, tps65090s, 223 ARRAY_SIZE(tps65090s), NULL, 224 0, regmap_irq_get_domain(tps65090->irq_data)); 225 if (ret) { 226 dev_err(&client->dev, "add mfd devices failed with err: %d\n", 227 ret); 228 goto err_irq_exit; 229 } 230 231 return 0; 232 233 err_irq_exit: 234 if (client->irq) 235 regmap_del_irq_chip(client->irq, tps65090->irq_data); 236 return ret; 237 } 238 239 static int tps65090_i2c_remove(struct i2c_client *client) 240 { 241 struct tps65090 *tps65090 = i2c_get_clientdata(client); 242 243 mfd_remove_devices(tps65090->dev); 244 if (client->irq) 245 regmap_del_irq_chip(client->irq, tps65090->irq_data); 246 247 return 0; 248 } 249 250 static const struct i2c_device_id tps65090_id_table[] = { 251 { "tps65090", 0 }, 252 { }, 253 }; 254 MODULE_DEVICE_TABLE(i2c, tps65090_id_table); 255 256 static struct i2c_driver tps65090_driver = { 257 .driver = { 258 .name = "tps65090", 259 .of_match_table = of_match_ptr(tps65090_of_match), 260 }, 261 .probe = tps65090_i2c_probe, 262 .remove = tps65090_i2c_remove, 263 .id_table = tps65090_id_table, 264 }; 265 266 static int __init tps65090_init(void) 267 { 268 return i2c_add_driver(&tps65090_driver); 269 } 270 subsys_initcall(tps65090_init); 271 272 static void __exit tps65090_exit(void) 273 { 274 i2c_del_driver(&tps65090_driver); 275 } 276 module_exit(tps65090_exit); 277 278 MODULE_DESCRIPTION("TPS65090 core driver"); 279 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); 280 MODULE_LICENSE("GPL v2"); 281