diff options
| author | Heiko Schocher <hs@denx.de> | 2011-08-01 04:01:43 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-08-04 23:30:38 +0200 |
| commit | 780f13a9e1a21098c6255aaa1c46ed80aa7a436c (patch) | |
| tree | 4273c1af78aa2f3079e11997e12814d66d47439e /drivers/hwmon/lm81.c | |
| parent | fb6440ee9b110b759ef61fd80bbd0df1bbf0f37b (diff) | |
| download | olio-uboot-2014.01-780f13a9e1a21098c6255aaa1c46ed80aa7a436c.tar.xz olio-uboot-2014.01-780f13a9e1a21098c6255aaa1c46ed80aa7a436c.zip | |
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.c | 21 |
1 files changed, 2 insertions, 19 deletions
diff --git a/drivers/hwmon/lm81.c b/drivers/hwmon/lm81.c index afe5b0de3..f1572ba27 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) \ |