99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
/*
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* Copyright (C) 2011 Samsung Electronics
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* Lukasz Majewski <l.majewski@samsung.com>
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*
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* (C) Copyright 2010
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* Stefano Babic, DENX Software Engineering, sbabic@denx.de
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*
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* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
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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 <common.h>
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#include <linux/types.h>
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#include <pmic.h>
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#include <i2c.h>
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int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
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{
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unsigned char buf[4] = { 0 };
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if (check_reg(reg))
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return -1;
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switch (pmic_i2c_tx_num) {
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case 3:
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buf[0] = (val >> 16) & 0xff;
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buf[1] = (val >> 8) & 0xff;
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buf[2] = val & 0xff;
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break;
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case 1:
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buf[0] = val & 0xff;
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break;
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default:
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printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
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return -1;
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}
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if (i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
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return -1;
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return 0;
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}
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int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
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{
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unsigned char buf[4] = { 0 };
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u32 ret_val = 0;
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if (check_reg(reg))
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return -1;
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if (i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
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return -1;
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switch (pmic_i2c_tx_num) {
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case 3:
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ret_val = buf[0] << 16 | buf[1] << 8 | buf[2];
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break;
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case 1:
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ret_val = buf[0];
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break;
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default:
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printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
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return -1;
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}
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memcpy(val, &ret_val, sizeof(ret_val));
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return 0;
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}
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int pmic_probe(struct pmic *p)
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{
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I2C_SET_BUS(p->bus);
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debug("PMIC:%s probed!\n", p->name);
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if (i2c_probe(pmic_i2c_addr)) {
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printf("Can't find PMIC:%s\n", p->name);
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return -1;
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}
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return 0;
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}
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