[U-Boot-Users] [PATCH] [PATCH] I2C Monitor Chip ADT7460 support

[Ricardo Ribalda Delgado]

From: Ricardo Ribalda Delgado <ricardo at aragorn.ii.uam.es>

Add support to the ADT7460 Monitor Chip by Analog
Devices.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda at uam.es>
---
 drivers/hwmon/Makefile  |    1 +
 drivers/hwmon/adt7460.c |   86 +++++++++++++++++++++++++++++++++++++++++++++++
 include/dtt.h           |    3 +-
 3 files changed, 89 insertions(+), 1 deletions(-)
 create mode 100644 drivers/hwmon/adt7460.c

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..0239e82
--- /dev/null
+++ b/drivers/hwmon/adt7460.c
@@ -0,0 +1,86 @@
+/*   
+    (C) Copyright 2008
+    Ricado Ribalda-Universidad Autonoma de Madrid, ricardo.ribalda at uam.es
+    This work has been supported by: Q-Technology  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)
+{
+	puts("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 34053d1..ce0fdfa 100644
--- 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 */
 
-- 
1.5.6.2