1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/ 4 * Andrew F. Davis <afd@ti.com> 5 * 6 * Based on the TPS65912 driver 7 */ 8 9 #include <linux/i2c.h> 10 #include <linux/interrupt.h> 11 #include <linux/mfd/core.h> 12 #include <linux/module.h> 13 14 #include <linux/mfd/tps65086.h> 15 16 static const struct mfd_cell tps65086_cells[] = { 17 { .name = "tps65086-regulator", }, 18 { .name = "tps65086-gpio", }, 19 { .name = "tps65086-reset", }, 20 }; 21 22 static const struct regmap_range tps65086_yes_ranges[] = { 23 regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ), 24 regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC), 25 regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL), 26 regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS), 27 }; 28 29 static const struct regmap_access_table tps65086_volatile_table = { 30 .yes_ranges = tps65086_yes_ranges, 31 .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges), 32 }; 33 34 static const struct regmap_config tps65086_regmap_config = { 35 .reg_bits = 8, 36 .val_bits = 8, 37 .cache_type = REGCACHE_RBTREE, 38 .volatile_table = &tps65086_volatile_table, 39 }; 40 41 static const struct regmap_irq tps65086_irqs[] = { 42 REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK), 43 REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK), 44 REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK), 45 }; 46 47 static struct regmap_irq_chip tps65086_irq_chip = { 48 .name = "tps65086", 49 .status_base = TPS65086_IRQ, 50 .mask_base = TPS65086_IRQ_MASK, 51 .ack_base = TPS65086_IRQ, 52 .init_ack_masked = true, 53 .num_regs = 1, 54 .irqs = tps65086_irqs, 55 .num_irqs = ARRAY_SIZE(tps65086_irqs), 56 }; 57 58 static const struct of_device_id tps65086_of_match_table[] = { 59 { .compatible = "ti,tps65086", }, 60 { /* sentinel */ } 61 }; 62 MODULE_DEVICE_TABLE(of, tps65086_of_match_table); 63 64 static int tps65086_probe(struct i2c_client *client) 65 { 66 struct tps65086 *tps; 67 unsigned int version; 68 int ret; 69 70 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); 71 if (!tps) 72 return -ENOMEM; 73 74 i2c_set_clientdata(client, tps); 75 tps->dev = &client->dev; 76 tps->irq = client->irq; 77 78 tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config); 79 if (IS_ERR(tps->regmap)) { 80 dev_err(tps->dev, "Failed to initialize register map\n"); 81 return PTR_ERR(tps->regmap); 82 } 83 84 /* Store device ID to load regulator configuration that fit to IC variant */ 85 ret = regmap_read(tps->regmap, TPS65086_DEVICEID1, &tps->chip_id); 86 if (ret) { 87 dev_err(tps->dev, "Failed to read revision register 1\n"); 88 return ret; 89 } 90 91 ret = regmap_read(tps->regmap, TPS65086_DEVICEID2, &version); 92 if (ret) { 93 dev_err(tps->dev, "Failed to read revision register 2\n"); 94 return ret; 95 } 96 97 dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n", 98 (version & TPS65086_DEVICEID2_PART_MASK), 99 (char)((version & TPS65086_DEVICEID2_OTP_MASK) >> 4) + 'A', 100 (version & TPS65086_DEVICEID2_REV_MASK) >> 6); 101 102 if (tps->irq > 0) { 103 ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0, 104 &tps65086_irq_chip, &tps->irq_data); 105 if (ret) { 106 dev_err(tps->dev, "Failed to register IRQ chip\n"); 107 return ret; 108 } 109 } 110 111 ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells, 112 ARRAY_SIZE(tps65086_cells), NULL, 0, 113 regmap_irq_get_domain(tps->irq_data)); 114 if (ret && tps->irq > 0) 115 regmap_del_irq_chip(tps->irq, tps->irq_data); 116 117 return ret; 118 } 119 120 static void tps65086_remove(struct i2c_client *client) 121 { 122 struct tps65086 *tps = i2c_get_clientdata(client); 123 124 if (tps->irq > 0) 125 regmap_del_irq_chip(tps->irq, tps->irq_data); 126 } 127 128 static const struct i2c_device_id tps65086_id_table[] = { 129 { "tps65086", 0 }, 130 { /* sentinel */ } 131 }; 132 MODULE_DEVICE_TABLE(i2c, tps65086_id_table); 133 134 static struct i2c_driver tps65086_driver = { 135 .driver = { 136 .name = "tps65086", 137 .of_match_table = tps65086_of_match_table, 138 }, 139 .probe = tps65086_probe, 140 .remove = tps65086_remove, 141 .id_table = tps65086_id_table, 142 }; 143 module_i2c_driver(tps65086_driver); 144 145 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); 146 MODULE_DESCRIPTION("TPS65086 PMIC Driver"); 147 MODULE_LICENSE("GPL v2"); 148