mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 07:34:31 +00:00
a22429d2bf
Return error in case of invalid pmic_i2c_tx_num. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Marek Vasut <marex@denx.de> Acked-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Stefano Babic <sbabic@denx.de>
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/*
|
|
* Copyright (C) 2011 Samsung Electronics
|
|
* Lukasz Majewski <l.majewski@samsung.com>
|
|
*
|
|
* (C) Copyright 2010
|
|
* Stefano Babic, DENX Software Engineering, sbabic@denx.de
|
|
*
|
|
* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <linux/types.h>
|
|
#include <pmic.h>
|
|
#include <i2c.h>
|
|
|
|
int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
|
|
{
|
|
unsigned char buf[4] = { 0 };
|
|
|
|
if (check_reg(reg))
|
|
return -1;
|
|
|
|
switch (pmic_i2c_tx_num) {
|
|
case 3:
|
|
buf[0] = (val >> 16) & 0xff;
|
|
buf[1] = (val >> 8) & 0xff;
|
|
buf[2] = val & 0xff;
|
|
break;
|
|
case 1:
|
|
buf[0] = val & 0xff;
|
|
break;
|
|
default:
|
|
printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
|
|
return -1;
|
|
}
|
|
|
|
if (i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
|
|
{
|
|
unsigned char buf[4] = { 0 };
|
|
u32 ret_val = 0;
|
|
|
|
if (check_reg(reg))
|
|
return -1;
|
|
|
|
if (i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
|
|
return -1;
|
|
|
|
switch (pmic_i2c_tx_num) {
|
|
case 3:
|
|
ret_val = buf[0] << 16 | buf[1] << 8 | buf[2];
|
|
break;
|
|
case 1:
|
|
ret_val = buf[0];
|
|
break;
|
|
default:
|
|
printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
|
|
return -1;
|
|
}
|
|
memcpy(val, &ret_val, sizeof(ret_val));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pmic_probe(struct pmic *p)
|
|
{
|
|
I2C_SET_BUS(p->bus);
|
|
debug("PMIC:%s probed!\n", p->name);
|
|
if (i2c_probe(pmic_i2c_addr)) {
|
|
printf("Can't find PMIC:%s\n", p->name);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|