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 const 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 .unmask_base = TPS65090_REG_INTR_MASK, 131 }; 132 133 static bool is_volatile_reg(struct device *dev, unsigned int reg) 134 { 135 /* Nearly all registers have status bits mixed in, except a few */ 136 switch (reg) { 137 case TPS65090_REG_INTR_MASK: 138 case TPS65090_REG_INTR_MASK2: 139 case TPS65090_REG_CG_CTRL0: 140 case TPS65090_REG_CG_CTRL1: 141 case TPS65090_REG_CG_CTRL2: 142 case TPS65090_REG_CG_CTRL3: 143 case TPS65090_REG_CG_CTRL4: 144 case TPS65090_REG_CG_CTRL5: 145 return false; 146 } 147 return true; 148 } 149 150 static const struct regmap_config tps65090_regmap_config = { 151 .reg_bits = 8, 152 .val_bits = 8, 153 .max_register = TPS65090_MAX_REG, 154 .num_reg_defaults_raw = TPS65090_NUM_REGS, 155 .cache_type = REGCACHE_RBTREE, 156 .volatile_reg = is_volatile_reg, 157 }; 158 159 #ifdef CONFIG_OF 160 static const struct of_device_id tps65090_of_match[] = { 161 { .compatible = "ti,tps65090",}, 162 {}, 163 }; 164 #endif 165 166 static int tps65090_i2c_probe(struct i2c_client *client) 167 { 168 struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev); 169 int irq_base = 0; 170 struct tps65090 *tps65090; 171 int ret; 172 173 if (!pdata && !client->dev.of_node) { 174 dev_err(&client->dev, 175 "tps65090 requires platform data or of_node\n"); 176 return -EINVAL; 177 } 178 179 if (pdata) 180 irq_base = pdata->irq_base; 181 182 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL); 183 if (!tps65090) 184 return -ENOMEM; 185 186 tps65090->dev = &client->dev; 187 i2c_set_clientdata(client, tps65090); 188 189 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config); 190 if (IS_ERR(tps65090->rmap)) { 191 ret = PTR_ERR(tps65090->rmap); 192 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret); 193 return ret; 194 } 195 196 if (client->irq) { 197 ret = regmap_add_irq_chip(tps65090->rmap, client->irq, 198 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base, 199 &tps65090_irq_chip, &tps65090->irq_data); 200 if (ret) { 201 dev_err(&client->dev, 202 "IRQ init failed with err: %d\n", ret); 203 return ret; 204 } 205 } else { 206 /* Don't tell children they have an IRQ that'll never fire */ 207 tps65090s[CHARGER].num_resources = 0; 208 } 209 210 ret = mfd_add_devices(tps65090->dev, -1, tps65090s, 211 ARRAY_SIZE(tps65090s), NULL, 212 0, regmap_irq_get_domain(tps65090->irq_data)); 213 if (ret) { 214 dev_err(&client->dev, "add mfd devices failed with err: %d\n", 215 ret); 216 goto err_irq_exit; 217 } 218 219 return 0; 220 221 err_irq_exit: 222 if (client->irq) 223 regmap_del_irq_chip(client->irq, tps65090->irq_data); 224 return ret; 225 } 226 227 228 static const struct i2c_device_id tps65090_id_table[] = { 229 { "tps65090", 0 }, 230 { }, 231 }; 232 233 static struct i2c_driver tps65090_driver = { 234 .driver = { 235 .name = "tps65090", 236 .suppress_bind_attrs = true, 237 .of_match_table = of_match_ptr(tps65090_of_match), 238 }, 239 .probe_new = tps65090_i2c_probe, 240 .id_table = tps65090_id_table, 241 }; 242 243 static int __init tps65090_init(void) 244 { 245 return i2c_add_driver(&tps65090_driver); 246 } 247 subsys_initcall(tps65090_init); 248