hwmon: Provide dtt_init()

Our boards rely on dtt for initialization of fan hardware.
dtt_init() was implemented to be called form board specific code.

Signed-off-by: Dirk Eibach <eibach@gdsys.de>
Acked-by: Heiko Schocher <hs@denx.de>
Tested-by: Heiko Schocher <hs@denx.de>

diff --git a/common/cmd_dtt.c b/common/cmd_dtt.c
index 5bba12d..cd94423 100644 (file)
--- a/common/cmd_dtt.c
+++ b/common/cmd_dtt.c
@@ -30,6 +30,36 @@
 
 static unsigned long sensor_initialized;
 
+static void _initialize_dtt(void)
+{
+       int i;
+       unsigned char sensors[] = CONFIG_DTT_SENSORS;
+
+       for (i = 0; i < sizeof(sensors); i++) {
+               if ((sensor_initialized & (1 << i)) == 0) {
+                       if (dtt_init_one(sensors[i]) != 0) {
+                               printf("DTT%d: Failed init!\n", i);
+                               continue;
+                       }
+                       sensor_initialized |= (1 << i);
+               }
+       }
+}
+
+void dtt_init(void)
+{
+       int old_bus;
+
+       /* switch to correct I2C bus */
+       old_bus = I2C_GET_BUS();
+       I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
+
+       _initialize_dtt();
+
+       /* switch back to original I2C bus */
+       I2C_SET_BUS(old_bus);
+}
+
 int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 {
        int i;
@@ -42,20 +72,14 @@ int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
        old_bus = I2C_GET_BUS();
        I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
 
+       _initialize_dtt();
+
        /*
         * Loop through sensors, read
         * temperature, and output it.
         */
-       for (i = 0; i < sizeof(sensors); i++) {
-               if ((sensor_initialized & (1 << i)) == 0) {
-                       if (dtt_init_one(sensors[i]) != 0) {
-                               printf("DTT%d: Failed init!\n", i);
-                               continue;
-                       }
-                       sensor_initialized |= (1 << i);
-               }
+       for (i = 0; i < sizeof(sensors); i++)
                printf("DTT%d: %i C\n", i + 1, dtt_get_temp(sensors[i]));
-       }
 
        /* switch back to original I2C bus */
        I2C_SET_BUS(old_bus);

diff --git a/include/dtt.h b/include/dtt.h
index 9e6c08c..6d5534d 100644 (file)
--- a/include/dtt.h
+++ b/include/dtt.h
@@ -52,6 +52,7 @@
 #endif
 #endif /* CONFIG_DTT_ADM1021 */
 
+extern void dtt_init(void);
 extern int dtt_init_one(int);
 extern int dtt_read(int sensor, int reg);
 extern int dtt_write(int sensor, int reg, int val);