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 static struct mfd_cell tps65090s[] = { 68 { 69 .name = "tps65090-pmic", 70 }, 71 { 72 .name = "tps65090-charger", 73 .num_resources = ARRAY_SIZE(charger_resources), 74 .resources = &charger_resources[0], 75 }, 76 }; 77 78 static const struct regmap_irq tps65090_irqs[] = { 79 /* INT1 IRQs*/ 80 [TPS65090_IRQ_VAC_STATUS_CHANGE] = { 81 .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE, 82 }, 83 [TPS65090_IRQ_VSYS_STATUS_CHANGE] = { 84 .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE, 85 }, 86 [TPS65090_IRQ_BAT_STATUS_CHANGE] = { 87 .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE, 88 }, 89 [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = { 90 .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE, 91 }, 92 [TPS65090_IRQ_CHARGING_COMPLETE] = { 93 .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE, 94 }, 95 [TPS65090_IRQ_OVERLOAD_DCDC1] = { 96 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1, 97 }, 98 [TPS65090_IRQ_OVERLOAD_DCDC2] = { 99 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2, 100 }, 101 /* INT2 IRQs*/ 102 [TPS65090_IRQ_OVERLOAD_DCDC3] = { 103 .reg_offset = 1, 104 .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3, 105 }, 106 [TPS65090_IRQ_OVERLOAD_FET1] = { 107 .reg_offset = 1, 108 .mask = TPS65090_INT2_MASK_OVERLOAD_FET1, 109 }, 110 [TPS65090_IRQ_OVERLOAD_FET2] = { 111 .reg_offset = 1, 112 .mask = TPS65090_INT2_MASK_OVERLOAD_FET2, 113 }, 114 [TPS65090_IRQ_OVERLOAD_FET3] = { 115 .reg_offset = 1, 116 .mask = TPS65090_INT2_MASK_OVERLOAD_FET3, 117 }, 118 [TPS65090_IRQ_OVERLOAD_FET4] = { 119 .reg_offset = 1, 120 .mask = TPS65090_INT2_MASK_OVERLOAD_FET4, 121 }, 122 [TPS65090_IRQ_OVERLOAD_FET5] = { 123 .reg_offset = 1, 124 .mask = TPS65090_INT2_MASK_OVERLOAD_FET5, 125 }, 126 [TPS65090_IRQ_OVERLOAD_FET6] = { 127 .reg_offset = 1, 128 .mask = TPS65090_INT2_MASK_OVERLOAD_FET6, 129 }, 130 [TPS65090_IRQ_OVERLOAD_FET7] = { 131 .reg_offset = 1, 132 .mask = TPS65090_INT2_MASK_OVERLOAD_FET7, 133 }, 134 }; 135 136 static struct regmap_irq_chip tps65090_irq_chip = { 137 .name = "tps65090", 138 .irqs = tps65090_irqs, 139 .num_irqs = ARRAY_SIZE(tps65090_irqs), 140 .num_regs = NUM_INT_REG, 141 .status_base = TPS65090_INT_STS, 142 .mask_base = TPS65090_INT_MSK, 143 .mask_invert = true, 144 }; 145 146 static bool is_volatile_reg(struct device *dev, unsigned int reg) 147 { 148 if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS2)) 149 return true; 150 else 151 return false; 152 } 153 154 static const struct regmap_config tps65090_regmap_config = { 155 .reg_bits = 8, 156 .val_bits = 8, 157 .max_register = TOTAL_NUM_REG, 158 .num_reg_defaults_raw = TOTAL_NUM_REG, 159 .cache_type = REGCACHE_RBTREE, 160 .volatile_reg = is_volatile_reg, 161 }; 162 163 #ifdef CONFIG_OF 164 static const struct of_device_id tps65090_of_match[] = { 165 { .compatible = "ti,tps65090",}, 166 {}, 167 }; 168 MODULE_DEVICE_TABLE(of, tps65090_of_match); 169 #endif 170 171 static int tps65090_i2c_probe(struct i2c_client *client, 172 const struct i2c_device_id *id) 173 { 174 struct tps65090_platform_data *pdata = client->dev.platform_data; 175 int irq_base = 0; 176 struct tps65090 *tps65090; 177 int ret; 178 179 if (!pdata && !client->dev.of_node) { 180 dev_err(&client->dev, 181 "tps65090 requires platform data or of_node\n"); 182 return -EINVAL; 183 } 184 185 if (pdata) 186 irq_base = pdata->irq_base; 187 188 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL); 189 if (!tps65090) { 190 dev_err(&client->dev, "mem alloc for tps65090 failed\n"); 191 return -ENOMEM; 192 } 193 194 tps65090->dev = &client->dev; 195 i2c_set_clientdata(client, tps65090); 196 197 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config); 198 if (IS_ERR(tps65090->rmap)) { 199 ret = PTR_ERR(tps65090->rmap); 200 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret); 201 return ret; 202 } 203 204 if (client->irq) { 205 ret = regmap_add_irq_chip(tps65090->rmap, client->irq, 206 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base, 207 &tps65090_irq_chip, &tps65090->irq_data); 208 if (ret) { 209 dev_err(&client->dev, 210 "IRQ init failed with err: %d\n", ret); 211 return ret; 212 } 213 } 214 215 ret = mfd_add_devices(tps65090->dev, -1, tps65090s, 216 ARRAY_SIZE(tps65090s), NULL, 217 0, regmap_irq_get_domain(tps65090->irq_data)); 218 if (ret) { 219 dev_err(&client->dev, "add mfd devices failed with err: %d\n", 220 ret); 221 goto err_irq_exit; 222 } 223 224 return 0; 225 226 err_irq_exit: 227 if (client->irq) 228 regmap_del_irq_chip(client->irq, tps65090->irq_data); 229 return ret; 230 } 231 232 static int tps65090_i2c_remove(struct i2c_client *client) 233 { 234 struct tps65090 *tps65090 = i2c_get_clientdata(client); 235 236 mfd_remove_devices(tps65090->dev); 237 if (client->irq) 238 regmap_del_irq_chip(client->irq, tps65090->irq_data); 239 240 return 0; 241 } 242 243 static const struct i2c_device_id tps65090_id_table[] = { 244 { "tps65090", 0 }, 245 { }, 246 }; 247 MODULE_DEVICE_TABLE(i2c, tps65090_id_table); 248 249 static struct i2c_driver tps65090_driver = { 250 .driver = { 251 .name = "tps65090", 252 .owner = THIS_MODULE, 253 .of_match_table = of_match_ptr(tps65090_of_match), 254 }, 255 .probe = tps65090_i2c_probe, 256 .remove = tps65090_i2c_remove, 257 .id_table = tps65090_id_table, 258 }; 259 260 static int __init tps65090_init(void) 261 { 262 return i2c_add_driver(&tps65090_driver); 263 } 264 subsys_initcall(tps65090_init); 265 266 static void __exit tps65090_exit(void) 267 { 268 i2c_del_driver(&tps65090_driver); 269 } 270 module_exit(tps65090_exit); 271 272 MODULE_DESCRIPTION("TPS65090 core driver"); 273 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); 274 MODULE_LICENSE("GPL v2"); 275