Add support for ADT7460 I2C monitor chip

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@uam.es>

diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index f09f145634c95d9ef08cc3987c806dd3b2915adb..7342b91935792e7fe4e95554d36188f7165afad2 100644 (file)
--- 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 (file)
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;
+}

diff --git a/include/dtt.h b/include/dtt.h
index 34053d10abfbfb52ef3ebbe606ec5f040b775ceb..ce0fdfad352029533a6c90c251cbaa431795f7da 100644 (file)
--- a/include/dtt.h
+++ b/include/dtt.h
@@ -32,7 +32,8 @@
     defined(CONFIG_DTT_DS1775) || \
     defined(CONFIG_DTT_LM81) || \
     defined(CONFIG_DTT_ADM1021) || \
-    defined(CONFIG_DTT_LM73)
+    defined(CONFIG_DTT_LM73) || \
+    defined(CONFIG_DTT_ADT7460)
 
 #define CONFIG_DTT                             /* We have a DTT */