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| Commit | Line | Data |
|---|---|---|
| d0039d4e RR |
1 | /* |
| 2 | * (C) Copyright 2008 | |
| 5b218ae1 | 3 | * Ricado Ribalda-Universidad Autonoma de Madrid, ricardo.ribalda@gmail.com |
| d0039d4e | 4 | * This work has been supported by: QTechnology http://qtec.com/ |
| 1a459660 WD |
5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | */ | |
| d0039d4e RR |
7 | |
| 8 | #include <common.h> | |
| 9 | #include <i2c.h> | |
| 10 | #include <dtt.h> | |
| 11 | ||
| 12 | #define ADT7460_ADDRESS 0x2c | |
| 13 | #define ADT7460_INVALID 128 | |
| 14 | #define ADT7460_CONFIG 0x40 | |
| 15 | #define ADT7460_REM1_TEMP 0x25 | |
| 16 | #define ADT7460_LOCAL_TEMP 0x26 | |
| 17 | #define ADT7460_REM2_TEMP 0x27 | |
| 18 | ||
| 19 | int dtt_read(int sensor, int reg) | |
| 20 | { | |
| 21 | u8 dir = reg; | |
| 22 | u8 data; | |
| 23 | ||
| 24 | if (i2c_read(ADT7460_ADDRESS, dir, 1, &data, 1) == -1) | |
| 25 | return -1; | |
| 26 | if (data == ADT7460_INVALID) | |
| 27 | return -1; | |
| 28 | ||
| 29 | return data; | |
| 30 | } | |
| 31 | ||
| 32 | int dtt_write(int sensor, int reg, int val) | |
| 33 | { | |
| 34 | u8 dir = reg; | |
| 35 | u8 data = val; | |
| 36 | ||
| 37 | if (i2c_write(ADT7460_ADDRESS, dir, 1, &data, 1) == -1) | |
| 38 | return -1; | |
| 39 | ||
| 40 | return 0; | |
| 41 | } | |
| 42 | ||
| 780f13a9 | 43 | int dtt_init_one(int sensor) |
| d0039d4e RR |
44 | { |
| 45 | printf("ADT7460 at I2C address 0x%2x\n", ADT7460_ADDRESS); | |
| 46 | ||
| 47 | if (dtt_write(0, ADT7460_CONFIG, 1) == -1) { | |
| 48 | puts("Error initialiting ADT7460\n"); | |
| 49 | return -1; | |
| 50 | } | |
| 51 | ||
| 52 | return 0; | |
| 53 | } | |
| 54 | ||
| 55 | int dtt_get_temp(int sensor) | |
| 56 | { | |
| 57 | int aux; | |
| 58 | u8 table[] = | |
| 59 | { ADT7460_REM1_TEMP, ADT7460_LOCAL_TEMP, ADT7460_REM2_TEMP }; | |
| 60 | ||
| 61 | if (sensor > 2) { | |
| 62 | puts("DTT sensor does not exist\n"); | |
| 63 | return -1; | |
| 64 | } | |
| 65 | ||
| 66 | aux = dtt_read(0, table[sensor]); | |
| 67 | if (aux == -1) { | |
| 68 | puts("DTT temperature read failed\n"); | |
| 69 | return -1; | |
| 70 | } | |
| 71 | ||
| 72 | return aux; | |
| 73 | } |