diff options
Diffstat (limited to 'firmware/target/arm/imx31/iomuxc-imx31.c')
-rw-r--r-- | firmware/target/arm/imx31/iomuxc-imx31.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/firmware/target/arm/imx31/iomuxc-imx31.c b/firmware/target/arm/imx31/iomuxc-imx31.c new file mode 100644 index 0000000000..876b8b2a9c --- /dev/null +++ b/firmware/target/arm/imx31/iomuxc-imx31.c | |||
@@ -0,0 +1,50 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (c) 2010 Michael Sevakis | ||
11 | * | ||
12 | * i.MX31 IOMUXC helper routines | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or | ||
15 | * modify it under the terms of the GNU General Public License | ||
16 | * as published by the Free Software Foundation; either version 2 | ||
17 | * of the License, or (at your option) any later version. | ||
18 | * | ||
19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
20 | * KIND, either express or implied. | ||
21 | * | ||
22 | ****************************************************************************/ | ||
23 | #include "config.h" | ||
24 | #include "system.h" | ||
25 | #include "iomuxc-imx31.h" | ||
26 | |||
27 | |||
28 | /* Set the pin multiplexing configuration (functional, GPIO, etc.) */ | ||
29 | void iomuxc_set_pin_mux(enum IMX31_IOMUXC_PINS pin, | ||
30 | unsigned long mux) | ||
31 | { | ||
32 | unsigned long index = pin / 4; | ||
33 | unsigned int shift = 8*(pin % 4); | ||
34 | |||
35 | imx31_regmod32((unsigned long *)(IOMUXC_BASE_ADDR + 0xc) + index, | ||
36 | mux << shift, IOMUXC_MUX_MASK << shift); | ||
37 | } | ||
38 | |||
39 | |||
40 | /* Set the pin pad configuration (keeper, drive strength, etc.) */ | ||
41 | void iomuxc_set_pad_config(enum IMX31_IOMUXC_PINS pin, | ||
42 | unsigned long config) | ||
43 | { | ||
44 | unsigned long padoffs = pin + 2; | ||
45 | unsigned long index = padoffs / 3; | ||
46 | unsigned int shift = 10*(padoffs % 3); | ||
47 | |||
48 | imx31_regmod32((unsigned long *)(IOMUXC_BASE_ADDR + 0x154) + index, | ||
49 | config << shift, IOMUXC_PAD_MASK << shift); | ||
50 | } | ||