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Simon Glass authored
Both of these values are useful for understanding what is going on, so show them both. The requested number comes from a device tree alias. The allocated one is set up when the device is activated, and is unique throughout the uclass. Signed-off-by:Simon Glass <sjg@chromium.org>
Simon Glass authoredBoth of these values are useful for understanding what is going on, so show them both. The requested number comes from a device tree alias. The allocated one is set up when the device is activated, and is unique throughout the uclass. Signed-off-by:
i2c.h 7.39 KiB
/*
* (C) Copyright 2001
* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* The original I2C interface was
* (C) 2000 by Paolo Scaffardi (arsenio@tin.it)
* AIRVENT SAM s.p.a - RIMINI(ITALY)
* but has been changed substantially.
*/
#ifndef _I2C_H_
#define _I2C_H_
/*
* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
*
* The implementation MUST NOT use static or global variables if the
* I2C routines are used to read SDRAM configuration information
* because this is done before the memories are initialized. Limited
* use of stack-based variables are OK (the initial stack size is
* limited).
*
* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
*/
/*
* Configuration items.
*/
#define I2C_RXTX_LEN 128 /* maximum tx/rx buffer length */
#ifdef CONFIG_I2C_MULTI_BUS
#define MAX_I2C_BUS 2
#define I2C_MULTI_BUS 1
#else
#define MAX_I2C_BUS 1
#define I2C_MULTI_BUS 0
#endif
#if !defined(CONFIG_SYS_MAX_I2C_BUS)
#define CONFIG_SYS_MAX_I2C_BUS MAX_I2C_BUS
#endif
/* define the I2C bus number for RTC and DTT if not already done */
#if !defined(CONFIG_SYS_RTC_BUS_NUM)
#define CONFIG_SYS_RTC_BUS_NUM 0
#endif
#if !defined(CONFIG_SYS_DTT_BUS_NUM)
#define CONFIG_SYS_DTT_BUS_NUM 0
#endif
#if !defined(CONFIG_SYS_SPD_BUS_NUM)
#define CONFIG_SYS_SPD_BUS_NUM 0
#endif