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/i2c.h> 15 #include <linux/err.h> 16 17 #include "mc13xxx.h" 18 19 static const struct i2c_device_id mc13xxx_i2c_device_id[] = { 20 { 21 .name = "mc13892", 22 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892, 23 }, { 24 .name = "mc34708", 25 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708, 26 }, { 27 /* sentinel */ 28 } 29 }; 30 MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id); 31 32 static const struct of_device_id mc13xxx_dt_ids[] = { 33 { 34 .compatible = "fsl,mc13892", 35 .data = &mc13xxx_variant_mc13892, 36 }, { 37 .compatible = "fsl,mc34708", 38 .data = &mc13xxx_variant_mc34708, 39 }, { 40 /* sentinel */ 41 } 42 }; 43 MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids); 44 45 static const struct regmap_config mc13xxx_regmap_i2c_config = { 46 .reg_bits = 8, 47 .val_bits = 24, 48 49 .max_register = MC13XXX_NUMREGS, 50 51 .cache_type = REGCACHE_NONE, 52 }; 53 54 static int mc13xxx_i2c_probe(struct i2c_client *client) 55 { 56 const struct i2c_device_id *id = i2c_client_get_device_id(client); 57 struct mc13xxx *mc13xxx; 58 int ret; 59 60 mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL); 61 if (!mc13xxx) 62 return -ENOMEM; 63 64 dev_set_drvdata(&client->dev, mc13xxx); 65 66 mc13xxx->irq = client->irq; 67 68 mc13xxx->regmap = devm_regmap_init_i2c(client, 69 &mc13xxx_regmap_i2c_config); 70 if (IS_ERR(mc13xxx->regmap)) { 71 ret = PTR_ERR(mc13xxx->regmap); 72 dev_err(&client->dev, "Failed to initialize regmap: %d\n", ret); 73 return ret; 74 } 75 76 if (client->dev.of_node) { 77 const struct of_device_id *of_id = 78 of_match_device(mc13xxx_dt_ids, &client->dev); 79 mc13xxx->variant = of_id->data; 80 } else { 81 mc13xxx->variant = (void *)id->driver_data; 82 } 83 84 return mc13xxx_common_init(&client->dev); 85 } 86 87 static void mc13xxx_i2c_remove(struct i2c_client *client) 88 { 89 mc13xxx_common_exit(&client->dev); 90 } 91 92 static struct i2c_driver mc13xxx_i2c_driver = { 93 .id_table = mc13xxx_i2c_device_id, 94 .driver = { 95 .name = "mc13xxx", 96 .of_match_table = mc13xxx_dt_ids, 97 }, 98 .probe = mc13xxx_i2c_probe, 99 .remove = mc13xxx_i2c_remove, 100 }; 101 102 static int __init mc13xxx_i2c_init(void) 103 { 104 return i2c_add_driver(&mc13xxx_i2c_driver); 105 } 106 subsys_initcall(mc13xxx_i2c_init); 107 108 static void __exit mc13xxx_i2c_exit(void) 109 { 110 i2c_del_driver(&mc13xxx_i2c_driver); 111 } 112 module_exit(mc13xxx_i2c_exit); 113 114 MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC"); 115 MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au"); 116 MODULE_LICENSE("GPL v2"); 117