1 /* 2 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ 3 * Andrew F. Davis <afd@ti.com> 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 10 * kind, whether expressed or implied; without even the implied warranty 11 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License version 2 for more details. 13 * 14 * Based on the TPS65912 driver 15 */ 16 17 #include <linux/i2c.h> 18 #include <linux/interrupt.h> 19 #include <linux/mfd/core.h> 20 #include <linux/module.h> 21 22 #include <linux/mfd/tps65086.h> 23 24 static const struct mfd_cell tps65086_cells[] = { 25 { .name = "tps65086-regulator", }, 26 { .name = "tps65086-gpio", }, 27 }; 28 29 static const struct regmap_range tps65086_yes_ranges[] = { 30 regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ), 31 regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC), 32 regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL), 33 regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS), 34 }; 35 36 static const struct regmap_access_table tps65086_volatile_table = { 37 .yes_ranges = tps65086_yes_ranges, 38 .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges), 39 }; 40 41 static const struct regmap_config tps65086_regmap_config = { 42 .reg_bits = 8, 43 .val_bits = 8, 44 .cache_type = REGCACHE_RBTREE, 45 .volatile_table = &tps65086_volatile_table, 46 }; 47 48 static const struct regmap_irq tps65086_irqs[] = { 49 REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK), 50 REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK), 51 REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK), 52 }; 53 54 static struct regmap_irq_chip tps65086_irq_chip = { 55 .name = "tps65086", 56 .status_base = TPS65086_IRQ, 57 .mask_base = TPS65086_IRQ_MASK, 58 .ack_base = TPS65086_IRQ, 59 .init_ack_masked = true, 60 .num_regs = 1, 61 .irqs = tps65086_irqs, 62 .num_irqs = ARRAY_SIZE(tps65086_irqs), 63 }; 64 65 static const struct of_device_id tps65086_of_match_table[] = { 66 { .compatible = "ti,tps65086", }, 67 { /* sentinel */ } 68 }; 69 MODULE_DEVICE_TABLE(of, tps65086_of_match_table); 70 71 static int tps65086_probe(struct i2c_client *client, 72 const struct i2c_device_id *ids) 73 { 74 struct tps65086 *tps; 75 unsigned int version; 76 int ret; 77 78 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); 79 if (!tps) 80 return -ENOMEM; 81 82 i2c_set_clientdata(client, tps); 83 tps->dev = &client->dev; 84 tps->irq = client->irq; 85 86 tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config); 87 if (IS_ERR(tps->regmap)) { 88 dev_err(tps->dev, "Failed to initialize register map\n"); 89 return PTR_ERR(tps->regmap); 90 } 91 92 ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version); 93 if (ret) { 94 dev_err(tps->dev, "Failed to read revision register\n"); 95 return ret; 96 } 97 98 dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n", 99 (version & TPS65086_DEVICEID_PART_MASK), 100 (char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A', 101 (version & TPS65086_DEVICEID_REV_MASK) >> 6); 102 103 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 ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells, 111 ARRAY_SIZE(tps65086_cells), NULL, 0, 112 regmap_irq_get_domain(tps->irq_data)); 113 if (ret) { 114 regmap_del_irq_chip(tps->irq, tps->irq_data); 115 return ret; 116 } 117 118 return 0; 119 } 120 121 static int tps65086_remove(struct i2c_client *client) 122 { 123 struct tps65086 *tps = i2c_get_clientdata(client); 124 125 regmap_del_irq_chip(tps->irq, tps->irq_data); 126 127 return 0; 128 } 129 130 static const struct i2c_device_id tps65086_id_table[] = { 131 { "tps65086", 0 }, 132 { /* sentinel */ } 133 }; 134 MODULE_DEVICE_TABLE(i2c, tps65086_id_table); 135 136 static struct i2c_driver tps65086_driver = { 137 .driver = { 138 .name = "tps65086", 139 .of_match_table = tps65086_of_match_table, 140 }, 141 .probe = tps65086_probe, 142 .remove = tps65086_remove, 143 .id_table = tps65086_id_table, 144 }; 145 module_i2c_driver(tps65086_driver); 146 147 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); 148 MODULE_DESCRIPTION("TPS65086 PMIC Driver"); 149 MODULE_LICENSE("GPL v2"); 150