]>
Commit | Line | Data |
---|---|---|
c4dc8ddb MG |
1 | /* |
2 | * Provide kernel console on headphone jack | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/gpio_mapping.h> | |
7 | #include <linux/gpio.h> | |
8 | ||
9 | /* | |
10 | * int add_preferred_console(char *name, int idx, char *options) | |
11 | * c0069208 T add_preferred_console | |
12 | */ | |
13 | ||
14 | static int (*add_preferred_console)(char *, int, char*) = (int (*)(char*, int, char*))0xc0069208; | |
15 | ||
16 | static int __init headphone_cons_init(void) | |
17 | { | |
18 | int hs_switch; | |
19 | ||
20 | /* Get the headset switch gpio number from devtree */ | |
21 | hs_switch = get_gpio_by_name("headset_uart_switch"); | |
22 | if (hs_switch < 0) | |
23 | return -EINVAL; | |
24 | ||
25 | /* configure headset switch gpio as output and | |
26 | direction based on devtree setting */ | |
27 | gpio_request(hs_switch, "mapphone audio headset uart switch"); | |
28 | ||
29 | /* route kernel uart out headset jack */ | |
30 | gpio_direction_output(hs_switch, 0); | |
31 | ||
32 | add_preferred_console("ttyS", 1, "115200"); | |
33 | return 0; | |
34 | } | |
35 | ||
36 | module_init(headphone_cons_init); | |
37 | ||
38 | MODULE_LICENSE("GPL"); | |
39 | MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>"); |