Root/arch/arm/mach-nomadik/i2c-8815nhk.c

1#include <linux/module.h>
2#include <linux/init.h>
3#include <linux/i2c.h>
4#include <linux/i2c-algo-bit.h>
5#include <linux/i2c-gpio.h>
6#include <linux/gpio.h>
7#include <linux/platform_device.h>
8
9/*
10 * There are two busses in the 8815NHK.
11 * They could, in theory, be driven by the hardware component, but we
12 * use bit-bang through GPIO by now, to keep things simple
13 */
14
15static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {
16    /* keep defaults for timeouts; pins are push-pull bidirectional */
17    .scl_pin = 62,
18    .sda_pin = 63,
19};
20
21static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {
22    /* keep defaults for timeouts; pins are push-pull bidirectional */
23    .scl_pin = 53,
24    .sda_pin = 54,
25};
26
27/* first bus: GPIO XX and YY */
28static struct platform_device nhk8815_i2c_dev0 = {
29    .name = "i2c-gpio",
30    .id = 0,
31    .dev = {
32        .platform_data = &nhk8815_i2c_data0,
33    },
34};
35/* second bus: GPIO XX and YY */
36static struct platform_device nhk8815_i2c_dev1 = {
37    .name = "i2c-gpio",
38    .id = 1,
39    .dev = {
40        .platform_data = &nhk8815_i2c_data1,
41    },
42};
43
44static int __init nhk8815_i2c_init(void)
45{
46    nmk_gpio_set_mode(nhk8815_i2c_data0.scl_pin, NMK_GPIO_ALT_GPIO);
47    nmk_gpio_set_mode(nhk8815_i2c_data0.sda_pin, NMK_GPIO_ALT_GPIO);
48    platform_device_register(&nhk8815_i2c_dev0);
49
50    nmk_gpio_set_mode(nhk8815_i2c_data1.scl_pin, NMK_GPIO_ALT_GPIO);
51    nmk_gpio_set_mode(nhk8815_i2c_data1.sda_pin, NMK_GPIO_ALT_GPIO);
52    platform_device_register(&nhk8815_i2c_dev1);
53
54    return 0;
55}
56
57static void __exit nhk8815_i2c_exit(void)
58{
59    platform_device_unregister(&nhk8815_i2c_dev0);
60    platform_device_unregister(&nhk8815_i2c_dev1);
61    return;
62}
63
64module_init(nhk8815_i2c_init);
65module_exit(nhk8815_i2c_exit);
66

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