1 /* 2 * Copyright 2009-2010 Creative Product Design 3 * Marc Reilly marc@cpdesign.com.au 4 * 5 * This program is free software; you can redistribute it and/or modify it under 6 * the terms of the GNU General Public License version 2 as published by the 7 * Free Software Foundation. 8 */ 9 10 #include <linux/slab.h> 11 #include <linux/module.h> 12 #include <linux/platform_device.h> 13 #include <linux/mfd/core.h> 14 #include <linux/mfd/mc13xxx.h> 15 #include <linux/of.h> 16 #include <linux/of_device.h> 17 #include <linux/of_gpio.h> 18 #include <linux/i2c.h> 19 #include <linux/err.h> 20 21 #include "mc13xxx.h" 22 23 static const struct i2c_device_id mc13xxx_i2c_device_id[] = { 24 { 25 .name = "mc13892", 26 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892, 27 }, { 28 .name = "mc34708", 29 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708, 30 }, { 31 /* sentinel */ 32 } 33 }; 34 MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id); 35 36 static const struct of_device_id mc13xxx_dt_ids[] = { 37 { 38 .compatible = "fsl,mc13892", 39 .data = &mc13xxx_variant_mc13892, 40 }, { 41 .compatible = "fsl,mc34708", 42 .data = &mc13xxx_variant_mc34708, 43 }, { 44 /* sentinel */ 45 } 46 }; 47 MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids); 48 49 static const struct regmap_config mc13xxx_regmap_i2c_config = { 50 .reg_bits = 8, 51 .val_bits = 24, 52 53 .max_register = MC13XXX_NUMREGS, 54 55 .cache_type = REGCACHE_NONE, 56 }; 57 58 static int mc13xxx_i2c_probe(struct i2c_client *client, 59 const struct i2c_device_id *id) 60 { 61 struct mc13xxx *mc13xxx; 62 int ret; 63 64 mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL); 65 if (!mc13xxx) 66 return -ENOMEM; 67 68 dev_set_drvdata(&client->dev, mc13xxx); 69 70 mc13xxx->irq = client->irq; 71 72 mc13xxx->regmap = devm_regmap_init_i2c(client, 73 &mc13xxx_regmap_i2c_config); 74 if (IS_ERR(mc13xxx->regmap)) { 75 ret = PTR_ERR(mc13xxx->regmap); 76 dev_err(&client->dev, "Failed to initialize regmap: %d\n", ret); 77 return ret; 78 } 79 80 if (client->dev.of_node) { 81 const struct of_device_id *of_id = 82 of_match_device(mc13xxx_dt_ids, &client->dev); 83 mc13xxx->variant = of_id->data; 84 } else { 85 mc13xxx->variant = (void *)id->driver_data; 86 } 87 88 return mc13xxx_common_init(&client->dev); 89 } 90 91 static int mc13xxx_i2c_remove(struct i2c_client *client) 92 { 93 return mc13xxx_common_exit(&client->dev); 94 } 95 96 static struct i2c_driver mc13xxx_i2c_driver = { 97 .id_table = mc13xxx_i2c_device_id, 98 .driver = { 99 .name = "mc13xxx", 100 .of_match_table = mc13xxx_dt_ids, 101 }, 102 .probe = mc13xxx_i2c_probe, 103 .remove = mc13xxx_i2c_remove, 104 }; 105 106 static int __init mc13xxx_i2c_init(void) 107 { 108 return i2c_add_driver(&mc13xxx_i2c_driver); 109 } 110 subsys_initcall(mc13xxx_i2c_init); 111 112 static void __exit mc13xxx_i2c_exit(void) 113 { 114 i2c_del_driver(&mc13xxx_i2c_driver); 115 } 116 module_exit(mc13xxx_i2c_exit); 117 118 MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC"); 119 MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au"); 120 MODULE_LICENSE("GPL v2"); 121