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9#include <common.h>
10#include <asm/io.h>
11#include <errno.h>
12#include <i2c.h>
13
14#define CH7301_I2C_ADDR 0x75
15
16enum {
17 CH7301_CM = 0x1c,
18 CH7301_IC = 0x1d,
19 CH7301_GPIO = 0x1e,
20 CH7301_IDF = 0x1f,
21 CH7301_CD = 0x20,
22 CH7301_DC = 0x21,
23 CH7301_HPD = 0x23,
24 CH7301_TCTL = 0x31,
25 CH7301_TPCP = 0x33,
26 CH7301_TPD = 0x34,
27 CH7301_TPVT = 0x35,
28 CH7301_TPF = 0x36,
29 CH7301_TCT = 0x37,
30 CH7301_TSTP = 0x48,
31 CH7301_PM = 0x49,
32 CH7301_VID = 0x4a,
33 CH7301_DID = 0x4b,
34 CH7301_DSP = 0x56,
35};
36
37int ch7301_i2c[] = CONFIG_SYS_CH7301_I2C;
38
39int ch7301_probe(unsigned screen, bool power)
40{
41 u8 value;
42
43 i2c_set_bus_num(ch7301_i2c[screen]);
44 if (i2c_probe(CH7301_I2C_ADDR))
45 return -1;
46
47 value = i2c_reg_read(CH7301_I2C_ADDR, CH7301_DID);
48 if (value != 0x17)
49 return -1;
50
51 if (power) {
52 i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPCP, 0x08);
53 i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPD, 0x16);
54 i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPF, 0x60);
55 i2c_reg_write(CH7301_I2C_ADDR, CH7301_DC, 0x09);
56 i2c_reg_write(CH7301_I2C_ADDR, CH7301_PM, 0xc0);
57 } else {
58 i2c_reg_write(CH7301_I2C_ADDR, CH7301_DC, 0x00);
59 i2c_reg_write(CH7301_I2C_ADDR, CH7301_PM, 0x01);
60 }
61
62 return 0;
63}
64