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
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/abx500/ab8500.h>
14 #include <linux/mfd/dbx500-prcmu.h>
16 static int ab8500_i2c_write(struct ab8500 *ab8500, u16 addr, u8 data)
20 ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
22 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
26 static int ab8500_i2c_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
31 ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
34 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
38 static int ab8500_i2c_read(struct ab8500 *ab8500, u16 addr)
43 ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
45 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
51 static int __devinit ab8500_i2c_probe(struct platform_device *plf)
53 const struct platform_device_id *platid = platform_get_device_id(plf);
54 struct ab8500 *ab8500;
55 struct resource *resource;
58 ab8500 = kzalloc(sizeof *ab8500, GFP_KERNEL);
62 ab8500->dev = &plf->dev;
64 resource = platform_get_resource(plf, IORESOURCE_IRQ, 0);
70 ab8500->irq = resource->start;
72 ab8500->read = ab8500_i2c_read;
73 ab8500->write = ab8500_i2c_write;
74 ab8500->write_masked = ab8500_i2c_write_masked;
76 platform_set_drvdata(plf, ab8500);
78 ret = ab8500_init(ab8500, platid->driver_data);
86 static int __devexit ab8500_i2c_remove(struct platform_device *plf)
88 struct ab8500 *ab8500 = platform_get_drvdata(plf);
96 static const struct platform_device_id ab8500_id[] = {
97 { "ab8500-i2c", AB8500_VERSION_AB8500 },
98 { "ab8505-i2c", AB8500_VERSION_AB8505 },
99 { "ab9540-i2c", AB8500_VERSION_AB9540 },
100 { "ab8540-i2c", AB8500_VERSION_AB8540 },
104 static struct platform_driver ab8500_i2c_driver = {
106 .name = "ab8500-i2c",
107 .owner = THIS_MODULE,
109 .probe = ab8500_i2c_probe,
110 .remove = __devexit_p(ab8500_i2c_remove),
111 .id_table = ab8500_id,
114 static int __init ab8500_i2c_init(void)
116 return platform_driver_register(&ab8500_i2c_driver);
119 static void __exit ab8500_i2c_exit(void)
121 platform_driver_unregister(&ab8500_i2c_driver);
123 arch_initcall(ab8500_i2c_init);
124 module_exit(ab8500_i2c_exit);
126 MODULE_AUTHOR("Mattias WALLIN <mattias.wallin@stericsson.com");
127 MODULE_DESCRIPTION("AB8500 Core access via PRCMU I2C");
128 MODULE_LICENSE("GPL v2");