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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>
This commit is contained in:
Dirk Eibach 2011-10-13 23:23:12 +00:00 committed by Wolfgang Denk
parent b3f44c21ea
commit b88e7b3cc0
2 changed files with 34 additions and 9 deletions
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42
common/cmd_dtt.c
View File

@ -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);

1
include/dtt.h
View File

@ -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);