diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/adt7460.c | 83 |
2 files changed, 84 insertions, 0 deletions
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index f09f145..7342b91 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -37,6 +37,7 @@ COBJS-$(CONFIG_DTT_DS1775) += ds1775.o COBJS-$(CONFIG_DTT_LM73) += lm73.o COBJS-$(CONFIG_DTT_LM75) += lm75.o COBJS-$(CONFIG_DTT_LM81) += lm81.o +COBJS-$(CONFIG_DTT_ADT7460) += adt7460.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/hwmon/adt7460.c b/drivers/hwmon/adt7460.c new file mode 100644 index 0000000..caef70a --- /dev/null +++ b/drivers/hwmon/adt7460.c @@ -0,0 +1,83 @@ +/* + * (C) Copyright 2008 + * Ricado Ribalda-Universidad Autonoma de Madrid, ricardo.ribalda@uam.es + * This work has been supported by: QTechnology http://qtec.com/ + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <common.h> +#include <i2c.h> +#include <dtt.h> + +#define ADT7460_ADDRESS 0x2c +#define ADT7460_INVALID 128 +#define ADT7460_CONFIG 0x40 +#define ADT7460_REM1_TEMP 0x25 +#define ADT7460_LOCAL_TEMP 0x26 +#define ADT7460_REM2_TEMP 0x27 + +int dtt_read(int sensor, int reg) +{ + u8 dir = reg; + u8 data; + + if (i2c_read(ADT7460_ADDRESS, dir, 1, &data, 1) == -1) + return -1; + if (data == ADT7460_INVALID) + return -1; + + return data; +} + +int dtt_write(int sensor, int reg, int val) +{ + u8 dir = reg; + u8 data = val; + + if (i2c_write(ADT7460_ADDRESS, dir, 1, &data, 1) == -1) + return -1; + + return 0; +} + +int dtt_init(void) +{ + printf("ADT7460 at I2C address 0x%2x\n", ADT7460_ADDRESS); + + if (dtt_write(0, ADT7460_CONFIG, 1) == -1) { + puts("Error initialiting ADT7460\n"); + return -1; + } + + return 0; +} + +int dtt_get_temp(int sensor) +{ + int aux; + u8 table[] = + { ADT7460_REM1_TEMP, ADT7460_LOCAL_TEMP, ADT7460_REM2_TEMP }; + + if (sensor > 2) { + puts("DTT sensor does not exist\n"); + return -1; + } + + aux = dtt_read(0, table[sensor]); + if (aux == -1) { + puts("DTT temperature read failed\n"); + return -1; + } + + return aux; +} |