1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2009-2010 Creative Product Design 4 * Marc Reilly marc@cpdesign.com.au 5 */ 6 7 #include <linux/slab.h> 8 #include <linux/module.h> 9 #include <linux/platform_device.h> 10 #include <linux/mfd/core.h> 11 #include <linux/mfd/mc13xxx.h> 12 #include <linux/of.h> 13 #include <linux/of_device.h> 14 #include <linux/of_gpio.h> 15 #include <linux/i2c.h> 16 #include <linux/err.h> 17 18 #include "mc13xxx.h" 19 20 static const struct i2c_device_id mc13xxx_i2c_device_id[] = { 21 { 22 .name = "mc13892", 23 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892, 24 }, { 25 .name = "mc34708", 26 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708, 27 }, { 28 /* sentinel */ 29 } 30 }; 31 MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id); 32 33 static const struct of_device_id mc13xxx_dt_ids[] = { 34 { 35 .compatible = "fsl,mc13892", 36 .data = &mc13xxx_variant_mc13892, 37 }, { 38 .compatible = "fsl,mc34708", 39 .data = &mc13xxx_variant_mc34708, 40 }, { 41 /* sentinel */ 42 } 43 }; 44 MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids); 45 46 static const struct regmap_config mc13xxx_regmap_i2c_config = { 47 .reg_bits = 8, 48 .val_bits = 24, 49 50 .max_register = MC13XXX_NUMREGS, 51 52 .cache_type = REGCACHE_NONE, 53 }; 54 55 static int mc13xxx_i2c_probe(struct i2c_client *client, 56 const struct i2c_device_id *id) 57 { 58 struct mc13xxx *mc13xxx; 59 int ret; 60 61 mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL); 62 if (!mc13xxx) 63 return -ENOMEM; 64 65 dev_set_drvdata(&client->dev, mc13xxx); 66 67 mc13xxx->irq = client->irq; 68 69 mc13xxx->regmap = devm_regmap_init_i2c(client, 70 &mc13xxx_regmap_i2c_config); 71 if (IS_ERR(mc13xxx->regmap)) { 72 ret = PTR_ERR(mc13xxx->regmap); 73 dev_err(&client->dev, "Failed to initialize regmap: %d\n", ret); 74 return ret; 75 } 76 77 if (client->dev.of_node) { 78 const struct of_device_id *of_id = 79 of_match_device(mc13xxx_dt_ids, &client->dev); 80 mc13xxx->variant = of_id->data; 81 } else { 82 mc13xxx->variant = (void *)id->driver_data; 83 } 84 85 return mc13xxx_common_init(&client->dev); 86 } 87 88 static int mc13xxx_i2c_remove(struct i2c_client *client) 89 { 90 mc13xxx_common_exit(&client->dev); 91 return 0; 92 } 93 94 static struct i2c_driver mc13xxx_i2c_driver = { 95 .id_table = mc13xxx_i2c_device_id, 96 .driver = { 97 .name = "mc13xxx", 98 .of_match_table = mc13xxx_dt_ids, 99 }, 100 .probe = mc13xxx_i2c_probe, 101 .remove = mc13xxx_i2c_remove, 102 }; 103 104 static int __init mc13xxx_i2c_init(void) 105 { 106 return i2c_add_driver(&mc13xxx_i2c_driver); 107 } 108 subsys_initcall(mc13xxx_i2c_init); 109 110 static void __exit mc13xxx_i2c_exit(void) 111 { 112 i2c_del_driver(&mc13xxx_i2c_driver); 113 } 114 module_exit(mc13xxx_i2c_exit); 115 116 MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC"); 117 MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au"); 118 MODULE_LICENSE("GPL v2"); 119