drivers/mfd/tps65219.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Driver for TPS65219 Integrated Power Management Integrated Chips (PMIC)
   4 //
   5 // Copyright (C) 2022 BayLibre Incorporated - https://www.baylibre.com/
   6
   7 #include <linux/i2c.h>
   8 #include <linux/reboot.h>
   9 #include <linux/regmap.h>
  10
  11 #include <linux/mfd/core.h>
  12 #include <linux/mfd/tps65219.h>
  13
  14 static int tps65219_warm_reset(struct tps65219 *tps)
  15 {
  16         return regmap_update_bits(tps->regmap, TPS65219_REG_MFP_CTRL,
  17                                   TPS65219_MFP_WARM_RESET_I2C_CTRL_MASK,
  18                                   TPS65219_MFP_WARM_RESET_I2C_CTRL_MASK);
  19 }
  20
  21 static int tps65219_cold_reset(struct tps65219 *tps)
  22 {
  23         return regmap_update_bits(tps->regmap, TPS65219_REG_MFP_CTRL,
  24                                   TPS65219_MFP_COLD_RESET_I2C_CTRL_MASK,
  25                                   TPS65219_MFP_COLD_RESET_I2C_CTRL_MASK);
  26 }
  27
  28 static int tps65219_restart(struct notifier_block *this,
  29                             unsigned long reboot_mode, void *cmd)
  30 {
  31         struct tps65219 *tps;
  32
  33         tps = container_of(this, struct tps65219, nb);
  34
  35         if (reboot_mode == REBOOT_WARM)
  36                 tps65219_warm_reset(tps);
  37         else
  38                 tps65219_cold_reset(tps);
  39
  40         return NOTIFY_DONE;
  41 }
  42
  43 static struct notifier_block pmic_rst_restart_nb = {
  44         .notifier_call = tps65219_restart,
  45         .priority = 200,
  46 };
  47
  48 static const struct resource tps65219_pwrbutton_resources[] = {
  49         DEFINE_RES_IRQ_NAMED(TPS65219_INT_PB_FALLING_EDGE_DETECT, "falling"),
  50         DEFINE_RES_IRQ_NAMED(TPS65219_INT_PB_RISING_EDGE_DETECT, "rising"),
  51 };
  52
  53 static const struct resource tps65219_regulator_resources[] = {
  54         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_SCG, "LDO3_SCG"),
  55         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_OC, "LDO3_OC"),
  56         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_UV, "LDO3_UV"),
  57         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_SCG, "LDO4_SCG"),
  58         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_OC, "LDO4_OC"),
  59         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_UV, "LDO4_UV"),
  60         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_SCG, "LDO1_SCG"),
  61         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_OC, "LDO1_OC"),
  62         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_UV, "LDO1_UV"),
  63         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_SCG, "LDO2_SCG"),
  64         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_OC, "LDO2_OC"),
  65         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_UV, "LDO2_UV"),
  66         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_SCG, "BUCK3_SCG"),
  67         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_OC, "BUCK3_OC"),
  68         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_NEG_OC, "BUCK3_NEG_OC"),
  69         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_UV, "BUCK3_UV"),
  70         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_SCG, "BUCK1_SCG"),
  71         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_OC, "BUCK1_OC"),
  72         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_NEG_OC, "BUCK1_NEG_OC"),
  73         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_UV, "BUCK1_UV"),
  74         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_SCG, "BUCK2_SCG"),
  75         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_OC, "BUCK2_OC"),
  76         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_NEG_OC, "BUCK2_NEG_OC"),
  77         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_UV, "BUCK2_UV"),
  78         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_RV, "BUCK1_RV"),
  79         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_RV, "BUCK2_RV"),
  80         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_RV, "BUCK3_RV"),
  81         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_RV, "LDO1_RV"),
  82         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_RV, "LDO2_RV"),
  83         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_RV, "LDO3_RV"),
  84         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_RV, "LDO4_RV"),
  85         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_RV_SD, "BUCK1_RV_SD"),
  86         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_RV_SD, "BUCK2_RV_SD"),
  87         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_RV_SD, "BUCK3_RV_SD"),
  88         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_RV_SD, "LDO1_RV_SD"),
  89         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_RV_SD, "LDO2_RV_SD"),
  90         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_RV_SD, "LDO3_RV_SD"),
  91         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_RV_SD, "LDO4_RV_SD"),
  92         DEFINE_RES_IRQ_NAMED(TPS65219_INT_TIMEOUT, "TIMEOUT"),
  93         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_3_WARM, "SENSOR_3_WARM"),
  94         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_2_WARM, "SENSOR_2_WARM"),
  95         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_1_WARM, "SENSOR_1_WARM"),
  96         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_0_WARM, "SENSOR_0_WARM"),
  97         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_3_HOT, "SENSOR_3_HOT"),
  98         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_2_HOT, "SENSOR_2_HOT"),
  99         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_1_HOT, "SENSOR_1_HOT"),
 100         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_0_HOT, "SENSOR_0_HOT"),
 101 };
 102
 103 static const struct mfd_cell tps65219_cells[] = {
 104         {
 105                 .name = "tps65219-regulator",
 106                 .resources = tps65219_regulator_resources,
 107                 .num_resources = ARRAY_SIZE(tps65219_regulator_resources),
 108         },
 109         { .name = "tps65219-gpios", },
 110 };
 111
 112 static const struct mfd_cell tps65219_pwrbutton_cell = {
 113         .name = "tps65219-pwrbutton",
 114         .resources = tps65219_pwrbutton_resources,
 115         .num_resources = ARRAY_SIZE(tps65219_pwrbutton_resources),
 116 };
 117
 118 static const struct regmap_config tps65219_regmap_config = {
 119         .reg_bits = 8,
 120         .val_bits = 8,
 121         .max_register = TPS65219_REG_FACTORY_CONFIG_2,
 122 };
 123
 124 /*
 125  * Mapping of main IRQ register bits to sub-IRQ register offsets so that we can
 126  * access corect sub-IRQ registers based on bits that are set in main IRQ
 127  * register.
 128  */
 129 /* Timeout Residual Voltage Shutdown */
 130 static unsigned int bit0_offsets[] = { TPS65219_REG_INT_TO_RV_POS };
 131 static unsigned int bit1_offsets[] = { TPS65219_REG_INT_RV_POS };       /* Residual Voltage */
 132 static unsigned int bit2_offsets[] = { TPS65219_REG_INT_SYS_POS };      /* System */
 133 static unsigned int bit3_offsets[] = { TPS65219_REG_INT_BUCK_1_2_POS }; /* Buck 1-2 */
 134 static unsigned int bit4_offsets[] = { TPS65219_REG_INT_BUCK_3_POS };   /* Buck 3 */
 135 static unsigned int bit5_offsets[] = { TPS65219_REG_INT_LDO_1_2_POS };  /* LDO 1-2 */
 136 static unsigned int bit6_offsets[] = { TPS65219_REG_INT_LDO_3_4_POS };  /* LDO 3-4 */
 137 static unsigned int bit7_offsets[] = { TPS65219_REG_INT_PB_POS };       /* Power Button */
 138
 139 static struct regmap_irq_sub_irq_map tps65219_sub_irq_offsets[] = {
 140         REGMAP_IRQ_MAIN_REG_OFFSET(bit0_offsets),
 141         REGMAP_IRQ_MAIN_REG_OFFSET(bit1_offsets),
 142         REGMAP_IRQ_MAIN_REG_OFFSET(bit2_offsets),
 143         REGMAP_IRQ_MAIN_REG_OFFSET(bit3_offsets),
 144         REGMAP_IRQ_MAIN_REG_OFFSET(bit4_offsets),
 145         REGMAP_IRQ_MAIN_REG_OFFSET(bit5_offsets),
 146         REGMAP_IRQ_MAIN_REG_OFFSET(bit6_offsets),
 147         REGMAP_IRQ_MAIN_REG_OFFSET(bit7_offsets),
 148 };
 149
 150 #define TPS65219_REGMAP_IRQ_REG(int_name, register_position) \
 151         REGMAP_IRQ_REG(int_name, register_position, int_name##_MASK)
 152
 153 static struct regmap_irq tps65219_irqs[] = {
 154         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_SCG, TPS65219_REG_INT_LDO_3_4_POS),
 155         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_OC, TPS65219_REG_INT_LDO_3_4_POS),
 156         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_UV, TPS65219_REG_INT_LDO_3_4_POS),
 157         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_SCG, TPS65219_REG_INT_LDO_3_4_POS),
 158         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_OC, TPS65219_REG_INT_LDO_3_4_POS),
 159         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_UV, TPS65219_REG_INT_LDO_3_4_POS),
 160         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_SCG, TPS65219_REG_INT_LDO_1_2_POS),
 161         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_OC, TPS65219_REG_INT_LDO_1_2_POS),
 162         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_UV, TPS65219_REG_INT_LDO_1_2_POS),
 163         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_SCG, TPS65219_REG_INT_LDO_1_2_POS),
 164         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_OC, TPS65219_REG_INT_LDO_1_2_POS),
 165         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_UV, TPS65219_REG_INT_LDO_1_2_POS),
 166         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_SCG, TPS65219_REG_INT_BUCK_3_POS),
 167         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_OC, TPS65219_REG_INT_BUCK_3_POS),
 168         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_NEG_OC, TPS65219_REG_INT_BUCK_3_POS),
 169         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_UV, TPS65219_REG_INT_BUCK_3_POS),
 170         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_SCG, TPS65219_REG_INT_BUCK_1_2_POS),
 171         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_OC, TPS65219_REG_INT_BUCK_1_2_POS),
 172         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_NEG_OC, TPS65219_REG_INT_BUCK_1_2_POS),
 173         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_UV, TPS65219_REG_INT_BUCK_1_2_POS),
 174         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_SCG, TPS65219_REG_INT_BUCK_1_2_POS),
 175         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_OC, TPS65219_REG_INT_BUCK_1_2_POS),
 176         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_NEG_OC, TPS65219_REG_INT_BUCK_1_2_POS),
 177         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_UV, TPS65219_REG_INT_BUCK_1_2_POS),
 178         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_3_WARM, TPS65219_REG_INT_SYS_POS),
 179         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_2_WARM, TPS65219_REG_INT_SYS_POS),
 180         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_1_WARM, TPS65219_REG_INT_SYS_POS),
 181         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_0_WARM, TPS65219_REG_INT_SYS_POS),
 182         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_3_HOT, TPS65219_REG_INT_SYS_POS),
 183         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_2_HOT, TPS65219_REG_INT_SYS_POS),
 184         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_1_HOT, TPS65219_REG_INT_SYS_POS),
 185         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_0_HOT, TPS65219_REG_INT_SYS_POS),
 186         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_RV, TPS65219_REG_INT_RV_POS),
 187         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_RV, TPS65219_REG_INT_RV_POS),
 188         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_RV, TPS65219_REG_INT_RV_POS),
 189         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_RV, TPS65219_REG_INT_RV_POS),
 190         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_RV, TPS65219_REG_INT_RV_POS),
 191         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_RV, TPS65219_REG_INT_RV_POS),
 192         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_RV, TPS65219_REG_INT_RV_POS),
 193         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 194         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 195         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 196         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 197         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 198         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 199         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 200         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_TIMEOUT, TPS65219_REG_INT_TO_RV_POS),
 201         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_PB_FALLING_EDGE_DETECT, TPS65219_REG_INT_PB_POS),
 202         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_PB_RISING_EDGE_DETECT, TPS65219_REG_INT_PB_POS),
 203 };
 204
 205 static struct regmap_irq_chip tps65219_irq_chip = {
 206         .name = "tps65219_irq",
 207         .main_status = TPS65219_REG_INT_SOURCE,
 208         .num_main_regs = 1,
 209         .num_main_status_bits = 8,
 210         .irqs = tps65219_irqs,
 211         .num_irqs = ARRAY_SIZE(tps65219_irqs),
 212         .status_base = TPS65219_REG_INT_LDO_3_4,
 213         .ack_base = TPS65219_REG_INT_LDO_3_4,
 214         .clear_ack = 1,
 215         .num_regs = 8,
 216         .sub_reg_offsets = tps65219_sub_irq_offsets,
 217 };
 218
 219 static int tps65219_probe(struct i2c_client *client)
 220 {
 221         struct tps65219 *tps;
 222         unsigned int chipid;
 223         bool pwr_button;
 224         int ret;
 225
 226         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
 227         if (!tps)
 228                 return -ENOMEM;
 229
 230         i2c_set_clientdata(client, tps);
 231
 232         tps->dev = &client->dev;
 233
 234         tps->regmap = devm_regmap_init_i2c(client, &tps65219_regmap_config);
 235         if (IS_ERR(tps->regmap)) {
 236                 ret = PTR_ERR(tps->regmap);
 237                 dev_err(tps->dev, "Failed to allocate register map: %d\n", ret);
 238                 return ret;
 239         }
 240
 241         ret = devm_regmap_add_irq_chip(&client->dev, tps->regmap, client->irq,
 242                                        IRQF_ONESHOT, 0, &tps65219_irq_chip,
 243                                        &tps->irq_data);
 244         if (ret)
 245                 return ret;
 246
 247         ret = regmap_read(tps->regmap, TPS65219_REG_TI_DEV_ID, &chipid);
 248         if (ret) {
 249                 dev_err(tps->dev, "Failed to read device ID: %d\n", ret);
 250                 return ret;
 251         }
 252
 253         ret = devm_mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO,
 254                                    tps65219_cells, ARRAY_SIZE(tps65219_cells),
 255                                    NULL, 0, regmap_irq_get_domain(tps->irq_data));
 256         if (ret) {
 257                 dev_err(tps->dev, "Failed to add child devices: %d\n", ret);
 258                 return ret;
 259         }
 260
 261         pwr_button = of_property_read_bool(tps->dev->of_node, "ti,power-button");
 262         if (pwr_button) {
 263                 ret = devm_mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO,
 264                                            &tps65219_pwrbutton_cell, 1, NULL, 0,
 265                                            regmap_irq_get_domain(tps->irq_data));
 266                 if (ret) {
 267                         dev_err(tps->dev, "Failed to add power-button: %d\n", ret);
 268                         return ret;
 269                 }
 270         }
 271
 272         tps->nb = pmic_rst_restart_nb;
 273         ret = register_restart_handler(&tps->nb);
 274         if (ret) {
 275                 dev_err(tps->dev, "cannot register restart handler, %d\n", ret);
 276                 return ret;
 277         }
 278
 279         return 0;
 280 }
 281
 282 static const struct of_device_id of_tps65219_match_table[] = {
 283         { .compatible = "ti,tps65219", },
 284         {}
 285 };
 286 MODULE_DEVICE_TABLE(of, of_tps65219_match_table);
 287
 288 static struct i2c_driver tps65219_driver = {
 289         .driver         = {
 290                 .name   = "tps65219",
 291                 .of_match_table = of_tps65219_match_table,
 292         },
 293         .probe_new      = tps65219_probe,
 294 };
 295 module_i2c_driver(tps65219_driver);
 296
 297 MODULE_AUTHOR("Jerome Neanne <jneanne@baylibre.com>");
 298 MODULE_DESCRIPTION("TPS65219 power management IC driver");
 299 MODULE_LICENSE("GPL");