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https://github.com/u-boot/u-boot.git
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780f13a9e1
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>
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/*
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* (C) Copyright 2001
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* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Digital Thermometers and Thermostats.
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*/
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#ifndef _DTT_H_
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#define _DTT_H_
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#if defined(CONFIG_DTT_ADM1021) || \
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defined(CONFIG_DTT_ADT7460) || \
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defined(CONFIG_DTT_DS1621) || \
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defined(CONFIG_DTT_DS1775) || \
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defined(CONFIG_DTT_LM63) || \
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defined(CONFIG_DTT_LM73) || \
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defined(CONFIG_DTT_LM75) || \
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defined(CONFIG_DTT_LM81)
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#define CONFIG_DTT /* We have a DTT */
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#ifndef CONFIG_DTT_ADM1021
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#define DTT_COMMERCIAL_MAX_TEMP 70 /* 0 - +70 C */
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#define DTT_INDUSTRIAL_MAX_TEMP 85 /* -40 - +85 C */
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#define DTT_AUTOMOTIVE_MAX_TEMP 105 /* -40 - +105 C */
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#ifndef CONFIG_SYS_DTT_MAX_TEMP
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#define CONFIG_SYS_DTT_MAX_TEMP DTT_COMMERCIAL_MAX_TEMP
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#endif
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#ifndef CONFIG_SYS_DTT_HYSTERESIS
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#define CONFIG_SYS_DTT_HYSTERESIS 5 /* 5 C */
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#endif
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#endif /* CONFIG_DTT_ADM1021 */
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extern int dtt_init_one(int);
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extern int dtt_read(int sensor, int reg);
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extern int dtt_write(int sensor, int reg, int val);
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extern int dtt_get_temp(int sensor);
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#endif
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#endif /* _DTT_H_ */
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