git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 39368eda MW |
1 | /* |
| 2 | * Copyright (C) ST-Ericsson SA 2010 | |
| 3 | * Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson. | |
| 4 | * License Terms: GNU General Public License v2 | |
| 5 | * This file was based on drivers/mfd/ab8500-spi.c | |
| 6 | */ | |
| 7 | ||
| 8 | #include <linux/kernel.h> | |
| 9 | #include <linux/slab.h> | |
| 10 | #include <linux/init.h> | |
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/platform_device.h> | |
| 13 | #include <linux/mfd/ab8500.h> | |
| 14 | ||
| 15 | #include <mach/prcmu.h> | |
| 16 | ||
| 17 | static int ab8500_i2c_write(struct ab8500 *ab8500, u16 addr, u8 data) | |
| 18 | { | |
| 19 | int ret; | |
| 20 | ||
| 21 | ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1); | |
| 22 | if (ret < 0) | |
| 23 | dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); | |
| 24 | return ret; | |
| 25 | } | |
| 26 | ||
| 27 | static int ab8500_i2c_read(struct ab8500 *ab8500, u16 addr) | |
| 28 | { | |
| 29 | int ret; | |
| 30 | u8 data; | |
| 31 | ||
| 32 | ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1); | |
| 33 | if (ret < 0) { | |
| 34 | dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); | |
| 35 | return ret; | |
| 36 | } | |
| 37 | return (int)data; | |
| 38 | } | |
| 39 | ||
| 40 | static int __devinit ab8500_i2c_probe(struct platform_device *plf) | |
| 41 | { | |
| 42 | struct ab8500 *ab8500; | |
| 43 | struct resource *resource; | |
| 44 | int ret; | |
| 45 | ||
| 46 | ab8500 = kzalloc(sizeof *ab8500, GFP_KERNEL); | |
| 47 | if (!ab8500) | |
| 48 | return -ENOMEM; | |
| 49 | ||
| 50 | ab8500->dev = &plf->dev; | |
| 51 | ||
| 52 | resource = platform_get_resource(plf, IORESOURCE_IRQ, 0); | |
| 53 | if (!resource) { | |
| 54 | kfree(ab8500); | |
| 55 | return -ENODEV; | |
| 56 | } | |
| 57 | ||
| 58 | ab8500->irq = resource->start; | |
| 59 | ||
| 60 | ab8500->read = ab8500_i2c_read; | |
| 61 | ab8500->write = ab8500_i2c_write; | |
| 62 | ||
| 63 | platform_set_drvdata(plf, ab8500); | |
| 64 | ||
| 65 | ret = ab8500_init(ab8500); | |
| 66 | if (ret) | |
| 67 | kfree(ab8500); | |
| 68 | ||
| 69 | return ret; | |
| 70 | } | |
| 71 | ||
| 72 | static int __devexit ab8500_i2c_remove(struct platform_device *plf) | |
| 73 | { | |
| 74 | struct ab8500 *ab8500 = platform_get_drvdata(plf); | |
| 75 | ||
| 76 | ab8500_exit(ab8500); | |
| 77 | kfree(ab8500); | |
| 78 | ||
| 79 | return 0; | |
| 80 | } | |
| 81 | ||
| 82 | static struct platform_driver ab8500_i2c_driver = { | |
| 83 | .driver = { | |
| 84 | .name = "ab8500-i2c", | |
| 85 | .owner = THIS_MODULE, | |
| 86 | }, | |
| 87 | .probe = ab8500_i2c_probe, | |
| 88 | .remove = __devexit_p(ab8500_i2c_remove) | |
| 89 | }; | |
| 90 | ||
| 91 | static int __init ab8500_i2c_init(void) | |
| 92 | { | |
| 93 | return platform_driver_register(&ab8500_i2c_driver); | |
| 94 | } | |
| 95 | ||
| 96 | static void __exit ab8500_i2c_exit(void) | |
| 97 | { | |
| 98 | platform_driver_unregister(&ab8500_i2c_driver); | |
| 99 | } | |
| 100 | subsys_initcall(ab8500_i2c_init); | |
| 101 | module_exit(ab8500_i2c_exit); | |
| 102 | ||
| 103 | MODULE_AUTHOR("Mattias WALLIN <mattias.wallin@stericsson.com"); | |
| 104 | MODULE_DESCRIPTION("AB8500 Core access via PRCMU I2C"); | |
| 105 | MODULE_LICENSE("GPL v2"); |