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1 /*
2  * Copyright (C) 2011 Samsung Electronics
3  * Lukasz Majewski <l.majewski@samsung.com>
4  *
5  * (C) Copyright 2010
6  * Stefano Babic, DENX Software Engineering, sbabic@denx.de
7  *
8  * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
9  *
10  * See file CREDITS for list of people who contributed to this
11  * project.
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License as
15  * published by the Free Software Foundation; either version 2 of
16  * the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26  * MA 02111-1307 USA
27  */
28
29 #include <common.h>
30 #include <linux/types.h>
31 #include <pmic.h>
32 #include <i2c.h>
33
34 int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
35 {
36         unsigned char buf[4] = { 0 };
37
38         if (check_reg(reg))
39                 return -1;
40
41         switch (pmic_i2c_tx_num) {
42         case 3:
43                 buf[0] = (val >> 16) & 0xff;
44                 buf[1] = (val >> 8) & 0xff;
45                 buf[2] = val & 0xff;
46                 break;
47         case 1:
48                 buf[0] = val & 0xff;
49                 break;
50         default:
51                 printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
52                 return -1;
53         }
54
55         if (i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
56                 return -1;
57
58         return 0;
59 }
60
61 int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
62 {
63         unsigned char buf[4] = { 0 };
64         u32 ret_val = 0;
65
66         if (check_reg(reg))
67                 return -1;
68
69         if (i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
70                 return -1;
71
72         switch (pmic_i2c_tx_num) {
73         case 3:
74                 ret_val = buf[0] << 16 | buf[1] << 8 | buf[2];
75                 break;
76         case 1:
77                 ret_val = buf[0];
78                 break;
79         default:
80                 printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
81                 return -1;
82         }
83         memcpy(val, &ret_val, sizeof(ret_val));
84
85         return 0;
86 }
87
88 int pmic_probe(struct pmic *p)
89 {
90         I2C_SET_BUS(p->bus);
91         debug("PMIC:%s probed!\n", p->name);
92         if (i2c_probe(pmic_i2c_addr)) {
93                 printf("Can't find PMIC:%s\n", p->name);
94                 return -1;
95         }
96
97         return 0;
98 }