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https://github.com/brain-hackers/u-boot-brain
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01bb24b642
The patch adds helper funtions for basic access to the registers of the MC9sdz60 chip (multifunctional device with RTC and CAN) via I2C interface. Signed-off-by: Stefano Babic <sbabic@denx.de>
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* (C) Copyright 2010 Stefano Babic <sbabic@denx.de>
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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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#include <config.h>
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#include <common.h>
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#include <asm/errno.h>
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#include <linux/types.h>
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#include <i2c.h>
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#include <mc9sdz60.h>
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#ifndef CONFIG_SYS_FSL_MC9SDZ60_I2C_ADDR
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#error "You have to configure I2C address for MC9SDZ60"
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#endif
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u8 mc9sdz60_reg_read(enum mc9sdz60_reg reg)
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{
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u8 val;
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if (i2c_read(CONFIG_SYS_FSL_MC9SDZ60_I2C_ADDR, reg, 1, &val, 1)) {
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puts("Error reading MC9SDZ60 register\n");
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return -1;
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}
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return val;
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}
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void mc9sdz60_reg_write(enum mc9sdz60_reg reg, u8 val)
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{
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i2c_write(CONFIG_SYS_FSL_MC9SDZ60_I2C_ADDR, reg, 1, &val, 1);
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}
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