1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /********************************************************************************
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (C) 2017 NEXTCHIP Inc. All rights reserved.
5*4882a593Smuzhiyun * Module : nvp6158_i2c.c
6*4882a593Smuzhiyun * Description :
7*4882a593Smuzhiyun * Author :
8*4882a593Smuzhiyun * Date :
9*4882a593Smuzhiyun * Version : Version 1.0
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun ********************************************************************************
12*4882a593Smuzhiyun * History :
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun *
15*4882a593Smuzhiyun ********************************************************************************/
16*4882a593Smuzhiyun #include <linux/string.h>
17*4882a593Smuzhiyun #include <linux/delay.h>
18*4882a593Smuzhiyun #include <linux/i2c.h>
19*4882a593Smuzhiyun #include <linux/i2c-dev.h>
20*4882a593Smuzhiyun #include "nvp6158_common.h"
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun extern struct i2c_client* nvp6158_client;
23*4882a593Smuzhiyun //origin
24*4882a593Smuzhiyun #if 0
25*4882a593Smuzhiyun void nvp6158_I2CWriteByte8(unsigned char chip_addr, unsigned char reg_addr, unsigned char value)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun int ret;
28*4882a593Smuzhiyun unsigned char buf[2];
29*4882a593Smuzhiyun struct i2c_client* client = nvp6158_client;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun nvp6158_client->addr = chip_addr;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun buf[0] = reg_addr;
34*4882a593Smuzhiyun buf[1] = value;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun ret = i2c_master_send(client, buf, 2);
37*4882a593Smuzhiyun udelay(300);
38*4882a593Smuzhiyun //return ret;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun unsigned char nvp6158_I2CReadByte8(unsigned char chip_addr, unsigned char reg_addr)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun int ret_data = 0xFF;
44*4882a593Smuzhiyun int ret;
45*4882a593Smuzhiyun struct i2c_client* client = nvp6158_client;
46*4882a593Smuzhiyun unsigned char buf[2];
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun nvp6158_client->addr = chip_addr;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun buf[0] = reg_addr;
51*4882a593Smuzhiyun ret = i2c_master_recv(client, buf, 1);
52*4882a593Smuzhiyun if (ret >= 0)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun ret_data = buf[0];
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun return ret_data;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun #endif
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun
nvp6158_I2CWriteByte8(unsigned char chip_addr,unsigned char reg_addr,unsigned char value)61*4882a593Smuzhiyun void nvp6158_I2CWriteByte8(unsigned char chip_addr, unsigned char reg_addr, unsigned char value)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun int ret;
64*4882a593Smuzhiyun unsigned char buf[2];
65*4882a593Smuzhiyun struct i2c_client* client = nvp6158_client;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun client->addr = chip_addr>>1;
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun buf[0] = reg_addr;
70*4882a593Smuzhiyun buf[1] = value;
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun ret = i2c_master_send(client, buf, 2);
73*4882a593Smuzhiyun udelay(300);
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
nvp6158_I2CReadByte8(unsigned char chip_addr,unsigned char reg_addr)76*4882a593Smuzhiyun unsigned char nvp6158_I2CReadByte8(unsigned char chip_addr, unsigned char reg_addr)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun struct i2c_client* client = nvp6158_client;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun client->addr = chip_addr>>1;
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun return i2c_smbus_read_byte_data(client, reg_addr);
83*4882a593Smuzhiyun }
84