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authorRicardo Ribalda Delgado <ricardo.ribalda@uam.es>2008-07-23 19:10:14 +0200
committerWolfgang Denk <wd@denx.de>2008-08-18 23:47:01 +0200
commitd0039d4ed275e6ca09fb417895024ad02be118c4 (patch)
tree1cf82edd4696b4593b5b2f9889a34f8cb29946d4 /drivers/hwmon
parenteb59ea45ab77c14b090ea857d9ea9f902f40db0b (diff)
downloadu-boot-linaro-stable-d0039d4ed275e6ca09fb417895024ad02be118c4.tar.gz
Add support for ADT7460 I2C monitor chip
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@uam.es>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/Makefile1
-rw-r--r--drivers/hwmon/adt7460.c83
2 files changed, 84 insertions, 0 deletions
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index f09f14563..7342b9193 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 000000000..caef70aff
--- /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;
+}