1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * I2C driver for the X-Powers' Power Management ICs 4 * 5 * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC 6 * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature 7 * as well as configurable GPIOs. 8 * 9 * This driver supports the I2C variants. 10 * 11 * Copyright (C) 2014 Carlo Caione 12 * 13 * Author: Carlo Caione <carlo@caione.org> 14 */ 15 16 #include <linux/acpi.h> 17 #include <linux/err.h> 18 #include <linux/i2c.h> 19 #include <linux/module.h> 20 #include <linux/mfd/axp20x.h> 21 #include <linux/of.h> 22 #include <linux/regmap.h> 23 #include <linux/slab.h> 24 25 static int axp20x_i2c_probe(struct i2c_client *i2c, 26 const struct i2c_device_id *id) 27 { 28 struct axp20x_dev *axp20x; 29 int ret; 30 31 axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL); 32 if (!axp20x) 33 return -ENOMEM; 34 35 axp20x->dev = &i2c->dev; 36 axp20x->irq = i2c->irq; 37 dev_set_drvdata(axp20x->dev, axp20x); 38 39 ret = axp20x_match_device(axp20x); 40 if (ret) 41 return ret; 42 43 axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg); 44 if (IS_ERR(axp20x->regmap)) { 45 ret = PTR_ERR(axp20x->regmap); 46 dev_err(&i2c->dev, "regmap init failed: %d\n", ret); 47 return ret; 48 } 49 50 return axp20x_device_probe(axp20x); 51 } 52 53 static int axp20x_i2c_remove(struct i2c_client *i2c) 54 { 55 struct axp20x_dev *axp20x = i2c_get_clientdata(i2c); 56 57 axp20x_device_remove(axp20x); 58 59 return 0; 60 } 61 62 #ifdef CONFIG_OF 63 static const struct of_device_id axp20x_i2c_of_match[] = { 64 { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID }, 65 { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID }, 66 { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID }, 67 { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID }, 68 { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID }, 69 { .compatible = "x-powers,axp803", .data = (void *)AXP803_ID }, 70 { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID }, 71 { }, 72 }; 73 MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match); 74 #endif 75 76 static const struct i2c_device_id axp20x_i2c_id[] = { 77 { "axp152", 0 }, 78 { "axp202", 0 }, 79 { "axp209", 0 }, 80 { "axp221", 0 }, 81 { "axp223", 0 }, 82 { "axp803", 0 }, 83 { "axp806", 0 }, 84 { }, 85 }; 86 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id); 87 88 #ifdef CONFIG_ACPI 89 static const struct acpi_device_id axp20x_i2c_acpi_match[] = { 90 { 91 .id = "INT33F4", 92 .driver_data = AXP288_ID, 93 }, 94 { }, 95 }; 96 MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match); 97 #endif 98 99 static struct i2c_driver axp20x_i2c_driver = { 100 .driver = { 101 .name = "axp20x-i2c", 102 .of_match_table = of_match_ptr(axp20x_i2c_of_match), 103 .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match), 104 }, 105 .probe = axp20x_i2c_probe, 106 .remove = axp20x_i2c_remove, 107 .id_table = axp20x_i2c_id, 108 }; 109 110 module_i2c_driver(axp20x_i2c_driver); 111 112 MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X"); 113 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); 114 MODULE_LICENSE("GPL"); 115