diff options
Diffstat (limited to 'firmware/target/mips/ingenic_x1000/i2c-x1000.h')
-rw-r--r-- | firmware/target/mips/ingenic_x1000/i2c-x1000.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/firmware/target/mips/ingenic_x1000/i2c-x1000.h b/firmware/target/mips/ingenic_x1000/i2c-x1000.h new file mode 100644 index 0000000000..e76624d511 --- /dev/null +++ b/firmware/target/mips/ingenic_x1000/i2c-x1000.h | |||
@@ -0,0 +1,44 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2021 Aidan MacDonald | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #ifndef __I2C_X1000_H__ | ||
23 | #define __I2C_X1000_H__ | ||
24 | |||
25 | #include "i2c-async.h" | ||
26 | |||
27 | #define I2C_FREQ_100K 100000 | ||
28 | #define I2C_FREQ_400K 400000 | ||
29 | |||
30 | extern void i2c_init(void); | ||
31 | |||
32 | /* Configure the I2C controller prior to use. | ||
33 | * | ||
34 | * - freq: frequency of SCL, should be <= 400 KHz and >= 25 KHz | ||
35 | * - use I2C_FREQ_100K for 100 KHz | ||
36 | * - use I2C_FREQ_400K for 400 Khz | ||
37 | * - use 0 to disable the controller completely | ||
38 | * - frequencies below 25 KHz will violate timing constraints | ||
39 | * | ||
40 | * TODO: move this to the i2c-async API, it's simple enough | ||
41 | */ | ||
42 | extern void i2c_x1000_set_freq(int chn, int freq); | ||
43 | |||
44 | #endif /* __I2C_X1000_H__ */ | ||