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authorDirk Eibach <eibach@gdsys.de>2011-10-13 23:23:12 +0000
committerWolfgang Denk <wd@denx.de>2011-10-22 01:22:21 +0200
commitb88e7b3cc022241d6582733b0c389d3d1887335f (patch)
tree26161e98fbdc88418f4ba092a2bb2ce11d86a64d
parentb3f44c21ea1a842eda757282d79e7c27efbf1f62 (diff)
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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>
-rw-r--r--common/cmd_dtt.c42
-rw-r--r--include/dtt.h1
2 files changed, 34 insertions, 9 deletions
diff --git a/common/cmd_dtt.c b/common/cmd_dtt.c
index 5bba12d..cd94423 100644
--- 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
--- 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);