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_soft_shutdown(struct tps65219 *tps)
  29 {
  30         return regmap_update_bits(tps->regmap, TPS65219_REG_MFP_CTRL,
  31                                   TPS65219_MFP_I2C_OFF_REQ_MASK,
  32                                   TPS65219_MFP_I2C_OFF_REQ_MASK);
  33 }
  34
  35 static int tps65219_power_off_handler(struct sys_off_data *data)
  36 {
  37         tps65219_soft_shutdown(data->cb_data);
  38         return NOTIFY_DONE;
  39 }
  40
  41 static int tps65219_restart(struct tps65219 *tps, unsigned long reboot_mode)
  42 {
  43         if (reboot_mode == REBOOT_WARM)
  44                 tps65219_warm_reset(tps);
  45         else
  46                 tps65219_cold_reset(tps);
  47
  48         return NOTIFY_DONE;
  49 }
  50
  51 static int tps65219_restart_handler(struct sys_off_data *data)
  52 {
  53         tps65219_restart(data->cb_data, data->mode);
  54         return NOTIFY_DONE;
  55 }
  56
  57 static const struct resource tps65219_pwrbutton_resources[] = {
  58         DEFINE_RES_IRQ_NAMED(TPS65219_INT_PB_FALLING_EDGE_DETECT, "falling"),
  59         DEFINE_RES_IRQ_NAMED(TPS65219_INT_PB_RISING_EDGE_DETECT, "rising"),
  60 };
  61
  62 static const struct resource tps65219_regulator_resources[] = {
  63         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_SCG, "LDO3_SCG"),
  64         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_OC, "LDO3_OC"),
  65         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_UV, "LDO3_UV"),
  66         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_SCG, "LDO4_SCG"),
  67         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_OC, "LDO4_OC"),
  68         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_UV, "LDO4_UV"),
  69         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_SCG, "LDO1_SCG"),
  70         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_OC, "LDO1_OC"),
  71         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_UV, "LDO1_UV"),
  72         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_SCG, "LDO2_SCG"),
  73         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_OC, "LDO2_OC"),
  74         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_UV, "LDO2_UV"),
  75         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_SCG, "BUCK3_SCG"),
  76         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_OC, "BUCK3_OC"),
  77         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_NEG_OC, "BUCK3_NEG_OC"),
  78         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_UV, "BUCK3_UV"),
  79         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_SCG, "BUCK1_SCG"),
  80         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_OC, "BUCK1_OC"),
  81         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_NEG_OC, "BUCK1_NEG_OC"),
  82         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_UV, "BUCK1_UV"),
  83         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_SCG, "BUCK2_SCG"),
  84         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_OC, "BUCK2_OC"),
  85         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_NEG_OC, "BUCK2_NEG_OC"),
  86         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_UV, "BUCK2_UV"),
  87         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_RV, "BUCK1_RV"),
  88         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_RV, "BUCK2_RV"),
  89         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_RV, "BUCK3_RV"),
  90         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_RV, "LDO1_RV"),
  91         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_RV, "LDO2_RV"),
  92         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_RV, "LDO3_RV"),
  93         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_RV, "LDO4_RV"),
  94         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK1_RV_SD, "BUCK1_RV_SD"),
  95         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK2_RV_SD, "BUCK2_RV_SD"),
  96         DEFINE_RES_IRQ_NAMED(TPS65219_INT_BUCK3_RV_SD, "BUCK3_RV_SD"),
  97         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO1_RV_SD, "LDO1_RV_SD"),
  98         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO2_RV_SD, "LDO2_RV_SD"),
  99         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO3_RV_SD, "LDO3_RV_SD"),
 100         DEFINE_RES_IRQ_NAMED(TPS65219_INT_LDO4_RV_SD, "LDO4_RV_SD"),
 101         DEFINE_RES_IRQ_NAMED(TPS65219_INT_TIMEOUT, "TIMEOUT"),
 102         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_3_WARM, "SENSOR_3_WARM"),
 103         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_2_WARM, "SENSOR_2_WARM"),
 104         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_1_WARM, "SENSOR_1_WARM"),
 105         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_0_WARM, "SENSOR_0_WARM"),
 106         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_3_HOT, "SENSOR_3_HOT"),
 107         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_2_HOT, "SENSOR_2_HOT"),
 108         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_1_HOT, "SENSOR_1_HOT"),
 109         DEFINE_RES_IRQ_NAMED(TPS65219_INT_SENSOR_0_HOT, "SENSOR_0_HOT"),
 110 };
 111
 112 static const struct mfd_cell tps65219_cells[] = {
 113         {
 114                 .name = "tps65219-regulator",
 115                 .resources = tps65219_regulator_resources,
 116                 .num_resources = ARRAY_SIZE(tps65219_regulator_resources),
 117         },
 118         { .name = "tps65219-gpio", },
 119 };
 120
 121 static const struct mfd_cell tps65219_pwrbutton_cell = {
 122         .name = "tps65219-pwrbutton",
 123         .resources = tps65219_pwrbutton_resources,
 124         .num_resources = ARRAY_SIZE(tps65219_pwrbutton_resources),
 125 };
 126
 127 static const struct regmap_config tps65219_regmap_config = {
 128         .reg_bits = 8,
 129         .val_bits = 8,
 130         .max_register = TPS65219_REG_FACTORY_CONFIG_2,
 131 };
 132
 133 /*
 134  * Mapping of main IRQ register bits to sub-IRQ register offsets so that we can
 135  * access corect sub-IRQ registers based on bits that are set in main IRQ
 136  * register.
 137  */
 138 /* Timeout Residual Voltage Shutdown */
 139 static unsigned int bit0_offsets[] = { TPS65219_REG_INT_TO_RV_POS };
 140 static unsigned int bit1_offsets[] = { TPS65219_REG_INT_RV_POS };       /* Residual Voltage */
 141 static unsigned int bit2_offsets[] = { TPS65219_REG_INT_SYS_POS };      /* System */
 142 static unsigned int bit3_offsets[] = { TPS65219_REG_INT_BUCK_1_2_POS }; /* Buck 1-2 */
 143 static unsigned int bit4_offsets[] = { TPS65219_REG_INT_BUCK_3_POS };   /* Buck 3 */
 144 static unsigned int bit5_offsets[] = { TPS65219_REG_INT_LDO_1_2_POS };  /* LDO 1-2 */
 145 static unsigned int bit6_offsets[] = { TPS65219_REG_INT_LDO_3_4_POS };  /* LDO 3-4 */
 146 static unsigned int bit7_offsets[] = { TPS65219_REG_INT_PB_POS };       /* Power Button */
 147
 148 static struct regmap_irq_sub_irq_map tps65219_sub_irq_offsets[] = {
 149         REGMAP_IRQ_MAIN_REG_OFFSET(bit0_offsets),
 150         REGMAP_IRQ_MAIN_REG_OFFSET(bit1_offsets),
 151         REGMAP_IRQ_MAIN_REG_OFFSET(bit2_offsets),
 152         REGMAP_IRQ_MAIN_REG_OFFSET(bit3_offsets),
 153         REGMAP_IRQ_MAIN_REG_OFFSET(bit4_offsets),
 154         REGMAP_IRQ_MAIN_REG_OFFSET(bit5_offsets),
 155         REGMAP_IRQ_MAIN_REG_OFFSET(bit6_offsets),
 156         REGMAP_IRQ_MAIN_REG_OFFSET(bit7_offsets),
 157 };
 158
 159 #define TPS65219_REGMAP_IRQ_REG(int_name, register_position) \
 160         REGMAP_IRQ_REG(int_name, register_position, int_name##_MASK)
 161
 162 static const struct regmap_irq tps65219_irqs[] = {
 163         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_SCG, TPS65219_REG_INT_LDO_3_4_POS),
 164         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_OC, TPS65219_REG_INT_LDO_3_4_POS),
 165         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_UV, TPS65219_REG_INT_LDO_3_4_POS),
 166         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_SCG, TPS65219_REG_INT_LDO_3_4_POS),
 167         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_OC, TPS65219_REG_INT_LDO_3_4_POS),
 168         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_UV, TPS65219_REG_INT_LDO_3_4_POS),
 169         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_SCG, TPS65219_REG_INT_LDO_1_2_POS),
 170         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_OC, TPS65219_REG_INT_LDO_1_2_POS),
 171         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_UV, TPS65219_REG_INT_LDO_1_2_POS),
 172         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_SCG, TPS65219_REG_INT_LDO_1_2_POS),
 173         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_OC, TPS65219_REG_INT_LDO_1_2_POS),
 174         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_UV, TPS65219_REG_INT_LDO_1_2_POS),
 175         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_SCG, TPS65219_REG_INT_BUCK_3_POS),
 176         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_OC, TPS65219_REG_INT_BUCK_3_POS),
 177         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_NEG_OC, TPS65219_REG_INT_BUCK_3_POS),
 178         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_UV, TPS65219_REG_INT_BUCK_3_POS),
 179         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_SCG, TPS65219_REG_INT_BUCK_1_2_POS),
 180         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_OC, TPS65219_REG_INT_BUCK_1_2_POS),
 181         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_NEG_OC, TPS65219_REG_INT_BUCK_1_2_POS),
 182         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_UV, TPS65219_REG_INT_BUCK_1_2_POS),
 183         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_SCG, TPS65219_REG_INT_BUCK_1_2_POS),
 184         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_OC, TPS65219_REG_INT_BUCK_1_2_POS),
 185         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_NEG_OC, TPS65219_REG_INT_BUCK_1_2_POS),
 186         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_UV, TPS65219_REG_INT_BUCK_1_2_POS),
 187         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_3_WARM, TPS65219_REG_INT_SYS_POS),
 188         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_2_WARM, TPS65219_REG_INT_SYS_POS),
 189         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_1_WARM, TPS65219_REG_INT_SYS_POS),
 190         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_0_WARM, TPS65219_REG_INT_SYS_POS),
 191         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_3_HOT, TPS65219_REG_INT_SYS_POS),
 192         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_2_HOT, TPS65219_REG_INT_SYS_POS),
 193         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_1_HOT, TPS65219_REG_INT_SYS_POS),
 194         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_SENSOR_0_HOT, TPS65219_REG_INT_SYS_POS),
 195         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_RV, TPS65219_REG_INT_RV_POS),
 196         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_RV, TPS65219_REG_INT_RV_POS),
 197         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_RV, TPS65219_REG_INT_RV_POS),
 198         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_RV, TPS65219_REG_INT_RV_POS),
 199         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_RV, TPS65219_REG_INT_RV_POS),
 200         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_RV, TPS65219_REG_INT_RV_POS),
 201         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_RV, TPS65219_REG_INT_RV_POS),
 202         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK1_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 203         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK2_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 204         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_BUCK3_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 205         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO1_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 206         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO2_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 207         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO3_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 208         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_LDO4_RV_SD, TPS65219_REG_INT_TO_RV_POS),
 209         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_TIMEOUT, TPS65219_REG_INT_TO_RV_POS),
 210         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_PB_FALLING_EDGE_DETECT, TPS65219_REG_INT_PB_POS),
 211         TPS65219_REGMAP_IRQ_REG(TPS65219_INT_PB_RISING_EDGE_DETECT, TPS65219_REG_INT_PB_POS),
 212 };
 213
 214 static const struct regmap_irq_chip tps65219_irq_chip = {
 215         .name = "tps65219_irq",
 216         .main_status = TPS65219_REG_INT_SOURCE,
 217         .num_main_regs = 1,
 218         .num_main_status_bits = 8,
 219         .irqs = tps65219_irqs,
 220         .num_irqs = ARRAY_SIZE(tps65219_irqs),
 221         .status_base = TPS65219_REG_INT_LDO_3_4,
 222         .ack_base = TPS65219_REG_INT_LDO_3_4,
 223         .clear_ack = 1,
 224         .num_regs = 8,
 225         .sub_reg_offsets = tps65219_sub_irq_offsets,
 226 };
 227
 228 static int tps65219_probe(struct i2c_client *client)
 229 {
 230         struct tps65219 *tps;
 231         unsigned int chipid;
 232         bool pwr_button;
 233         int ret;
 234
 235         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
 236         if (!tps)
 237                 return -ENOMEM;
 238
 239         i2c_set_clientdata(client, tps);
 240
 241         tps->dev = &client->dev;
 242
 243         tps->regmap = devm_regmap_init_i2c(client, &tps65219_regmap_config);
 244         if (IS_ERR(tps->regmap)) {
 245                 ret = PTR_ERR(tps->regmap);
 246                 dev_err(tps->dev, "Failed to allocate register map: %d\n", ret);
 247                 return ret;
 248         }
 249
 250         ret = devm_regmap_add_irq_chip(&client->dev, tps->regmap, client->irq,
 251                                        IRQF_ONESHOT, 0, &tps65219_irq_chip,
 252                                        &tps->irq_data);
 253         if (ret)
 254                 return ret;
 255
 256         ret = regmap_read(tps->regmap, TPS65219_REG_TI_DEV_ID, &chipid);
 257         if (ret) {
 258                 dev_err(tps->dev, "Failed to read device ID: %d\n", ret);
 259                 return ret;
 260         }
 261
 262         ret = devm_mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO,
 263                                    tps65219_cells, ARRAY_SIZE(tps65219_cells),
 264                                    NULL, 0, regmap_irq_get_domain(tps->irq_data));
 265         if (ret) {
 266                 dev_err(tps->dev, "Failed to add child devices: %d\n", ret);
 267                 return ret;
 268         }
 269
 270         pwr_button = of_property_read_bool(tps->dev->of_node, "ti,power-button");
 271         if (pwr_button) {
 272                 ret = devm_mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO,
 273                                            &tps65219_pwrbutton_cell, 1, NULL, 0,
 274                                            regmap_irq_get_domain(tps->irq_data));
 275                 if (ret) {
 276                         dev_err(tps->dev, "Failed to add power-button: %d\n", ret);
 277                         return ret;
 278                 }
 279         }
 280
 281         ret = devm_register_restart_handler(tps->dev,
 282                                             tps65219_restart_handler,
 283                                             tps);
 284
 285         if (ret) {
 286                 dev_err(tps->dev, "cannot register restart handler, %d\n", ret);
 287                 return ret;
 288         }
 289
 290         ret = devm_register_power_off_handler(tps->dev,
 291                                               tps65219_power_off_handler,
 292                                               tps);
 293         if (ret) {
 294                 dev_err(tps->dev, "failed to register power-off handler: %d\n", ret);
 295                 return ret;
 296         }
 297         return 0;
 298 }
 299
 300 static const struct of_device_id of_tps65219_match_table[] = {
 301         { .compatible = "ti,tps65219", },
 302         {}
 303 };
 304 MODULE_DEVICE_TABLE(of, of_tps65219_match_table);
 305
 306 static struct i2c_driver tps65219_driver = {
 307         .driver         = {
 308                 .name   = "tps65219",
 309                 .of_match_table = of_tps65219_match_table,
 310         },
 311         .probe          = tps65219_probe,
 312 };
 313 module_i2c_driver(tps65219_driver);
 314
 315 MODULE_AUTHOR("Jerome Neanne <jneanne@baylibre.com>");
 316 MODULE_DESCRIPTION("TPS65219 power management IC driver");
 317 MODULE_LICENSE("GPL");