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authorHeiko Schocher <hs@denx.de>2011-08-01 04:01:43 +0000
committerWolfgang Denk <wd@denx.de>2011-08-04 23:30:38 +0200
commit780f13a9e1a21098c6255aaa1c46ed80aa7a436c (patch)
tree4273c1af78aa2f3079e11997e12814d66d47439e /drivers/hwmon/lm81.c
parentfb6440ee9b110b759ef61fd80bbd0df1bbf0f37b (diff)
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>
Diffstat (limited to 'drivers/hwmon/lm81.c')
-rw-r--r--drivers/hwmon/lm81.c21
1 files changed, 2 insertions, 19 deletions
diff --git a/drivers/hwmon/lm81.c b/drivers/hwmon/lm81.c
index afe5b0de3f..f1572ba270 100644
--- a/drivers/hwmon/lm81.c
+++ b/drivers/hwmon/lm81.c
@@ -89,7 +89,7 @@ int dtt_write(int sensor, int reg, int val)
#define DTT_CONFIG 0x40
#define DTT_ADR 0x48
-static int _dtt_init(int sensor)
+int dtt_init_one(int sensor)
{
int man;
int adr;
@@ -111,26 +111,9 @@ static int _dtt_init(int sensor)
debug ("DTT: Found LM81@%x Rev: %d\n", adr, rev);
return 0;
-} /* _dtt_init() */
+} /* dtt_init_one() */
-int dtt_init (void)
-{
- int i;
- unsigned char sensors[] = CONFIG_DTT_SENSORS;
- const char *const header = "DTT: ";
-
- 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]));
- }
-
- return (0);
-} /* dtt_init() */
-
#define TEMP_FROM_REG(temp) \
((temp)<256?((((temp)&0x1fe) >> 1) * 10) + ((temp) & 1) * 5: \
((((temp)&0x1fe) >> 1) -255) * 10 - ((temp) & 1) * 5) \