From 780f13a9e1a21098c6255aaa1c46ed80aa7a436c Mon Sep 17 00:00:00 2001 From: Heiko Schocher Date: Mon, 1 Aug 2011 04:01:43 +0000 Subject: 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 cc: Wolfgang Denk cc: Holger Brunck --- drivers/hwmon/lm75.c | 29 ++--------------------------- 1 file changed, 2 insertions(+), 27 deletions(-) (limited to 'drivers/hwmon/lm75.c') 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) { -- cgit v1.1