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 { 27 struct axp20x_dev *axp20x; 28 int ret; 29 30 axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL); 31 if (!axp20x) 32 return -ENOMEM; 33 34 axp20x->dev = &i2c->dev; 35 axp20x->irq = i2c->irq; 36 dev_set_drvdata(axp20x->dev, axp20x); 37 38 ret = axp20x_match_device(axp20x); 39 if (ret) 40 return ret; 41 42 axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg); 43 if (IS_ERR(axp20x->regmap)) { 44 ret = PTR_ERR(axp20x->regmap); 45 dev_err(&i2c->dev, "regmap init failed: %d\n", ret); 46 return ret; 47 } 48 49 return axp20x_device_probe(axp20x); 50 } 51 52 static void axp20x_i2c_remove(struct i2c_client *i2c) 53 { 54 struct axp20x_dev *axp20x = i2c_get_clientdata(i2c); 55 56 axp20x_device_remove(axp20x); 57 } 58 59 #ifdef CONFIG_OF 60 static const struct of_device_id axp20x_i2c_of_match[] = { 61 { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID }, 62 { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID }, 63 { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID }, 64 { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID }, 65 { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID }, 66 { .compatible = "x-powers,axp803", .data = (void *)AXP803_ID }, 67 { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID }, 68 { }, 69 }; 70 MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match); 71 #endif 72 73 static const struct i2c_device_id axp20x_i2c_id[] = { 74 { "axp152", 0 }, 75 { "axp202", 0 }, 76 { "axp209", 0 }, 77 { "axp221", 0 }, 78 { "axp223", 0 }, 79 { "axp803", 0 }, 80 { "axp806", 0 }, 81 { }, 82 }; 83 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id); 84 85 #ifdef CONFIG_ACPI 86 static const struct acpi_device_id axp20x_i2c_acpi_match[] = { 87 { 88 .id = "INT33F4", 89 .driver_data = AXP288_ID, 90 }, 91 { }, 92 }; 93 MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match); 94 #endif 95 96 static struct i2c_driver axp20x_i2c_driver = { 97 .driver = { 98 .name = "axp20x-i2c", 99 .of_match_table = of_match_ptr(axp20x_i2c_of_match), 100 .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match), 101 }, 102 .probe_new = axp20x_i2c_probe, 103 .remove = axp20x_i2c_remove, 104 .id_table = axp20x_i2c_id, 105 }; 106 107 module_i2c_driver(axp20x_i2c_driver); 108 109 MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X"); 110 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); 111 MODULE_LICENSE("GPL"); 112