hwmon: do not init sensors on startup

The U-Boot Design Principles[1] clearly say:

  Initialize devices only when they are needed within U-Boot, i.e. don't
  initialize the Ethernet interface(s) unless U-Boot performs a download
  over Ethernet; don't initialize any IDE or USB devices unless U-Boot
  actually tries to load files from these, etc. (and don't forget to
  shut down these devices after using them - otherwise nasty things may
  happen when you try to boot your OS).

So, do not initialize and read the sensors on startup.

Signed-off-by: Heiko Schocher <hs@denx.de>
cc: Wolfgang Denk <wd@denx.de>
cc: Holger Brunck <holger.brunck@keymile.com>

1 files changed, 2 insertions, 27 deletions

diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 8119821..29c1a39 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -119,7 +119,7 @@ int dtt_write(int sensor, int reg, int val)
 } /* dtt_write() */
 
 
-static int _dtt_init(int sensor)
+int dtt_init_one(int sensor)
 {
 	int val;
 
@@ -145,32 +145,7 @@ static int _dtt_init(int sensor)
 		return 1;
 
 	return 0;
-} /* _dtt_init() */
-
-
-int dtt_init (void)
-{
-	int i;
-	unsigned char sensors[] = CONFIG_DTT_SENSORS;
-	const char *const header = "DTT:   ";
-	int old_bus;
-
-	/* switch to correct I2C bus */
-	old_bus = I2C_GET_BUS();
-	I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
-
-	for (i = 0; i < sizeof(sensors); i++) {
-	if (_dtt_init(sensors[i]) != 0)
-		printf("%s%d FAILED INIT\n", header, i+1);
-	else
-		printf("%s%d is %i C\n", header, i+1,
-		dtt_get_temp(sensors[i]));
-	}
-	/* switch back to original I2C bus */
-	I2C_SET_BUS(old_bus);
-
-	return (0);
-} /* dtt_init() */
+} /* dtt_init_one() */
 
 int dtt_get_temp(int sensor)
 {