1. 前言
使用一个941连接2 948显示: 941的GPIO0/1/2/3到前948的GPIO0/1/2/3和941的D_GPIO0/1/2/3到948的GPIO0/1/2/3。 设置gpio3输出，则941的D_GPIO3设置高，而948的gpio3设置不高; 但设置gpio3输入后，看到941的D_GPIO3跟随948的gpio3变化。
2. 原理图连接
3. 测试代码
static int du90ub941_enable_port(struct goodix_ts_data *ts,
int port_index)
{
u8 dreg, dval;
dreg = 0x1e;
dval = 0;
du90ub941_i2c_read(ts, dreg, &dval, 1);
dev_err(&ts->client->dev, “941[4] reg=0x%x, val=0x%x\n”, dreg, dval);
if (port_index == 0)
dval = 0x1;
else if (port_index == 1)
dval = 0x4;
else
return 0;
du90ub941_i2c_write(ts, dreg, &dval, 1);
}
//set gpio3 output
case 3:
dreg = 0x0f;
dval = 0;
du90ub941_i2c_read(ts, dreg, &dval, 1);
dev_err(&ts->client->dev, “941 before out reg=0x%x, val=0x%x\n”, dreg,
dval);
dval &= 0xf0;
dval |= 0x03;
du90ub941_i2c_write(ts, dreg, &dval, 1);
dval = 0;
du90ub941_i2c_read(ts, dreg, &dval, 1);
dev_err(&ts->client->dev, “941 after out reg=0x%x, val=0x%x\n”, dreg,
dval);
dreg = 0x1f;
dval = 0;
du90ub948_i2c_read(ts, dreg, &dval, 1);
dev_err(&ts->client->dev, “948 before out reg=0x%x, val=0x%x\n”, dreg,
dval);
dval &= 0xf0;
dval |= 0x05;
du90ub948_i2c_write(ts, dreg, &dval, 1);
dval = 0;
du90ub948_i2c_read(ts, dreg, &dval, 1);
dev_err(&ts->client->dev, “948 after out reg=0x%x, val=0x%x\n”, dreg,
dval);
break;
//set gpio3 input
case 3:
dreg = 0x0f;
dval = 0;
du90ub941_i2c_read(ts, dreg, &dval, 1);
dev_err(&ts->client->dev, “941 in reg=0x%x, val=0x%x\n”, dreg, dval);
dval &= 0xf0;
dval |= 0x05;
du90ub941_i2c_write(ts, dreg, &dval, 1);
dreg = 0x1f;
dval = 0;
du90ub948_i2c_read(ts, dreg, &dval, 1);
dev_err(&ts->client->dev, “948 in reg=0x%x, val=0x%x\n”, dreg, dval);
dval &= 0xf0;
dval |= 0x03;
du90ub948_i2c_write(ts, dreg, &dval, 1);
break;
<
log：
[ 1.498605] Semidrive DS941 DS948 Goodix-TS 5-0014: goodix_ts_probe(): get_gpio error=0
[ 1.506790] Semidrive DS941 DS948 Goodix-TS 5-0014: ts->addr_ds941=0xd, ts->addr_ds948=0x3c
[ 1.515252] Semidrive DS941 DS948 Goodix-TS 5-0014: ts->irq_channel=3, ts->reset_channel=2
[ 1.543934] Semidrive DS941 DS948 Goodix-TS 5-0014: 941[4] reg=0x1e, val=0x4
[ 1.553453] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x17, val=0x9e
[ 1.560793] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x7, val=0xba
[ 1.568074] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x8, val=0xba
[ 1.575323] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x70, val=0x28
[ 1.582664] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x77, val=0x28
[ 1.590005] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 before out reg=0xf, val=0x0
[ 1.601109] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 after out reg=0xf, val=0x3 //
[ 1.609183] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 before out reg=0x1f, val=0x3
[ 1.617677] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 after out reg=0x1f, val=0x5 //output
[ 1.644092] Semidrive DS941 DS948 Goodix-TS 5-0014: goodix_ts_probe(): call reset
[ 1.652122] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 before reg=0x1e, val=0x90
[ 1.660449] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 after reg=0x1e, val=0x10
[ 1.752086] Semidrive DS941 DS948 Goodix-TS 5-0014: ts->client->addr == 0x14 1
[ 1.761469] Semidrive DS941 DS948 Goodix-TS 5-0014: goodix_reset(): reset high
[ 1.769163] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 before reg=0x1e, val=0x10
[ 1.777396] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 after reg=0x1e, val=0x90
[ 1.852568] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 in reg=0xf, val=0x3
[ 1.860261] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 in reg=0x1f, val=0x5
4. 检测解串串行锁定状态
检测948是否都已锁定并正在接收视频数据 检测两个948的端口0是否都连接到941AS了
连接941和2个948，锁定状态正常，连接正常 (941的GPIO和第一个948的GPIO， 941的D_GPIO和第二个948的GPIO)
5. 检查注册转储
[ 3.254829] Semidrive DS941 DS948 Goodix-TS 5-0014: I2C Address: 0x14
[ 3.261313] Semidrive DS941 DS948 Goodix-TS 5-0014: GPIO lookup for consumer irq
[ 3.261320] Semidrive DS941 DS948 Goodix-TS 5-0014: using device tree for GPIO lookup
[ 3.261383] of_get_named_gpiod_flags: parsed irq-gpios property of node /soc/i2c@30b70000/touch@14[0] – status (0)
[ 3.261400] Semidrive DS941 DS948 Goodix-TS 5-0014: GPIO lookup for consumer reset
[ 3.261407] Semidrive DS941 DS948 Goodix-TS 5-0014: using device tree for GPIO lookup
[ 3.261429] of_get_named_gpiod_flags: parsed reset-gpios property of node /soc/i2c@30b70000/touch@14[0] – status (0)
[ 3.261793] Semidrive DS941 DS948 Goodix-TS 5-0014: goodix_ts_probe(): get_gpio error=0
[ 3.269925] Semidrive DS941 DS948 Goodix-TS 5-0014: ts->addr_ds941=0xd, ts->addr_ds948=0x3c
[ 3.278311] Semidrive DS941 DS948 Goodix-TS 5-0014: ts->irq_channel=3, ts->reset_channel=2
[ 3.286768] Semidrive DS941 DS948 Goodix-TS 5-0014: 941[4] reg=0x1e, val=0x4
[ 3.294760] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x17, val=0x9e
[ 3.301829] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x7, val=0xba
[ 3.308811] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x8, val=0xba
[ 3.315792] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x70, val=0x28
[ 3.322860] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 reg=0x77, val=0x28
[ 3.329928] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 before out reg=0xf, val=0x0
[ 3.337903] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 after out reg=0xf, val=0x3
[ 3.345695] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 before out reg=0x1f, val=0x3
[ 3.353809] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 after out reg=0x1f, val=0x5
[ 3.378934] Semidrive DS941 DS948 Goodix-TS 5-0014: goodix_ts_probe(): call reset
[ 3.386637] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 before reg=0x1e, val=0x90
[ 3.394489] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 after reg=0x1e, val=0x10
[ 3.486930] Semidrive DS941 DS948 Goodix-TS 5-0014: ts->client->addr == 0x14 1
[ 3.496310] Semidrive DS941 DS948 Goodix-TS 5-0014: goodix_reset(): reset high
[ 3.503752] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 before reg=0x1e, val=0x10
[ 3.511604] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 after reg=0x1e, val=0x90
[ 3.519036] Semidrive DS941 DS948 Goodix-TS 5-0014: dump 941:
[ 3.524969] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x0, val=0x1a
[ 3.532297] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x1, val=0x0
[ 3.539538] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x2, val=0x0
[ 3.546779] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x3, val=0x9a
[ 3.554107] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x4, val=0x0
[ 3.561350] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x5, val=0x0
[ 3.568592] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x6, val=0x78
[ 3.575921] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x7, val=0xba
[ 3.583248] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x8, val=0xba
[ 3.590575] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x9, val=0x1
[ 3.597817] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0xa, val=0x83
[ 3.605147] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0xb, val=0x5
[ 3.612388] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0xc, val=0x67
[ 3.619717] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0xd, val=0x30
[ 3.627096] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0xe, val=0x0
[ 3.634339] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0xf, val=0x3
[ 3.641580] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x10, val=0x0
[ 3.648908] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x11, val=0x0
[ 3.656235] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x12, val=0x4
[ 3.663566] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x13, val=0x8f
[ 3.670980] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x14, val=0x0
[ 3.678310] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x15, val=0x0
[ 3.685639] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x16, val=0xfe
[ 3.693054] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x17, val=0x9e
[ 3.700471] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x18, val=0x7f
[ 3.707887] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x19, val=0x7f
[ 3.715302] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x1a, val=0x1
[ 3.722631] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x1b, val=0x0
[ 3.729959] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x1c, val=0x8
[ 3.737288] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x1d, val=0x0
[ 3.744616] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x1e, val=0x4
[ 3.751944] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x1f, val=0x0
[ 3.759273] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x20, val=0xb
[ 3.766600] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x21, val=0x0
[ 3.773930] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x22, val=0x25
[ 3.781346] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x23, val=0x0
[ 3.788673] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x24, val=0x0
[ 3.796001] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x25, val=0x0
sssssssssssssssssssssssssssssss
[ 3.803330] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x26, val=0x0
[ 3.810659] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x27, val=0x0
[ 3.817993] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x28, val=0x1
[ 3.825315] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x29, val=0x20
[ 3.832732] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x2a, val=0x20
[ 3.840167] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x2b, val=0xa0
[ 3.847583] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x2c, val=0x0
[ 3.854932] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x2d, val=0x0
[ 3.862323] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x2e, val=0xa5
[ 3.869741] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x2f, val=0x5a
[ 3.877175] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x30, val=0x0
[ 3.884509] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x31, val=0xb9
[ 3.891924] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x32, val=0x0
[ 3.899253] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x33, val=0x5
[ 3.906581] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x34, val=0xc
[ 3.913909] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x35, val=0x0
[ 3.921238] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x36, val=0x0
[ 3.928567] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x37, val=0x0
[ 3.935895] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x38, val=0x0
[ 3.943224] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x39, val=0x0
[ 3.950551] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x3a, val=0x0
[ 3.957878] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x3b, val=0x0
[ 3.965207] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x3c, val=0x0
[ 3.972534] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x3d, val=0x0
[ 3.979862] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x3e, val=0x81
[ 3.987276] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x3f, val=0x2
[ 3.994606] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x40, val=0x8
[ 4.001935] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x41, val=0x5
[ 4.009264] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x42, val=0x16
[ 4.016678] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x43, val=0x0
[ 4.024007] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x44, val=0x0
[ 4.031336] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x45, val=0x0
[ 4.038664] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x46, val=0x0
[ 4.045993] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x47, val=0x0
[ 4.053321] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x48, val=0x0
[ 4.060650] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x49, val=0x0
[ 4.067979] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x4a, val=0x0
[ 4.075308] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x4b, val=0x0
[ 4.082638] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x4c, val=0x0
[ 4.089967] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x4d, val=0x0
[ 4.097295] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x4e, val=0x0
[ 4.104624] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x4f, val=0x8c
[ 4.112039] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x50, val=0x16
[ 4.119454] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x51, val=0x0
[ 4.126781] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x52, val=0x0
[ 4.134108] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x53, val=0x0
[ 4.141438] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x54, val=0x2
[ 4.148769] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x55, val=0x10
[ 4.156183] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x56, val=0x0
[ 4.163512] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x57, val=0x2
[ 4.170840] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x58, val=0x0
[ 4.178170] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x59, val=0x0
[ 4.185498] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x5a, val=0xe9
[ 4.192912] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x5b, val=0x5
[ 4.200246] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x5c, val=0x7
[ 4.207570] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x5d, val=0x6
[ 4.214901] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x5e, val=0x44
[ 4.222316] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x5f, val=0x56
[ 4.229731] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x60, val=0x22
[ 4.237145] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x61, val=0x2
[ 4.244474] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x62, val=0x0
[ 4.251801] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x63, val=0x0
[ 4.259130] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x64, val=0x10
[ 4.266545] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x65, val=0x0
[ 4.273872] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x66, val=0x0
[ 4.281201] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x67, val=0x0
[ 4.288529] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x68, val=0x0
[ 4.295857] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x69, val=0x0
[ 4.303185] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x6a, val=0x0
[ 4.310514] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x6b, val=0x0
[ 4.317842] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x6c, val=0x0
[ 4.325170] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x6d, val=0x0
[ 4.332498] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x6e, val=0x20
[ 4.339914] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 out reg=0x6f, val=0x0
[ 4.347083] Semidrive DS941 DS948 Goodix-TS 5-0014: dump 948:
[ 4.353045] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x0, val=0x78
[ 4.360402] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x1, val=0x4
[ 4.367673] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x2, val=0x0
[ 4.374940] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x3, val=0xf0
[ 4.382298] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x4, val=0xfe
[ 4.389655] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x5, val=0x1e
[ 4.397011] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x6, val=0x0
[ 4.404282] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x7, val=0x1a
[ 4.411637] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x8, val=0x0
[ 4.418912] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x9, val=0x0
[ 4.426183] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0xa, val=0x0
[ 4.433453] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0xb, val=0x0
[ 4.440725] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0xc, val=0x0
[ 4.447993] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0xd, val=0x0
[ 4.455263] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0xe, val=0x0
[ 4.462533] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0xf, val=0x0
[ 4.469803] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x10, val=0x0
[ 4.477160] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x11, val=0x0
[ 4.484516] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x12, val=0x0
[ 4.491872] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x13, val=0x0
[ 4.499228] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x14, val=0x0
[ 4.506584] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x15, val=0x0
[ 4.513942] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x16, val=0x0
[ 4.521298] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x17, val=0x0
[ 4.528654] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x18, val=0x0
[ 4.536011] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x19, val=0x1
[ 4.543369] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x1a, val=0x0
[ 4.550724] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x1b, val=0x0
[ 4.558081] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x1c, val=0x3
[ 4.565438] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x1d, val=0x10
[ 4.572881] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x1e, val=0x90
[ 4.580326] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x1f, val=0x5
[ 4.587687] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x20, val=0x0
[ 4.595035] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x21, val=0x0
[ 4.602394] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x22, val=0x44
[ 4.609837] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x23, val=0x20
[ 4.617280] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x24, val=0x8
[ 4.624638] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x25, val=0x0
[ 4.631996] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x26, val=0x83
[ 4.639437] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x27, val=0x84
[ 4.646906] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x28, val=0x1
[ 4.654255] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x29, val=0x0
[ 4.661612] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x2a, val=0x0
[ 4.668969] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x2b, val=0x0
[ 4.676325] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x2c, val=0x0
[ 4.683682] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x2d, val=0x0
[ 4.691036] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x2e, val=0x0
[ 4.698389] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x2f, val=0x0
[ 4.705746] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x30, val=0x0
[ 4.713102] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x31, val=0x0
[ 4.720460] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x32, val=0x90
[ 4.727902] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x33, val=0x25
[ 4.735346] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x34, val=0x1
[ 4.742703] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x35, val=0x0
[ 4.750059] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x36, val=0x0
[ 4.757417] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x37, val=0x8a
[ 4.764859] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x38, val=0x0
[ 4.772216] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x39, val=0x0
[ 4.779573] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x3a, val=0x0
[ 4.786929] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x3b, val=0x0
[ 4.794288] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x3c, val=0x20
[ 4.801729] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x3d, val=0xe0
[ 4.809173] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x3e, val=0x23
[ 4.816616] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x3f, val=0x0
[ 4.823974] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x40, val=0x43
[ 4.831416] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x41, val=0x3
[ 4.838772] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x42, val=0x3
[ 4.846125] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x43, val=0x0
[ 4.853550] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x44, val=0x60
[ 4.860994] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x45, val=0x88
[ 4.868436] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x46, val=0x0
[ 4.875792] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x47, val=0x0
[ 4.883149] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x48, val=0xf
[ 4.890505] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x49, val=0x2
[ 4.897864] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x4a, val=0x0
[ 4.905218] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x4b, val=0x8
[ 4.912575] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x4c, val=0x0
[ 4.919931] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x4d, val=0x0
[ 4.927290] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x4e, val=0x63
[ 4.934732] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x4f, val=0x0
[ 4.942088] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x50, val=0x3
[ 4.949447] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x51, val=0x10
[ 4.956888] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x52, val=0x0
[ 4.964247] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x53, val=0x1
[ 4.971608] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x54, val=0x80
[ 4.979046] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x55, val=0x0
[ 4.986402] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x56, val=0x0
[ 4.993759] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x57, val=0x0
[ 5.001115] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x58, val=0x0
[ 5.008472] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x59, val=0x7f
[ 5.015915] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x5a, val=0x20
[ 5.023358] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x5b, val=0x20
[ 5.030802] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x5c, val=0x0
[ 5.038158] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x5d, val=0x0
[ 5.045515] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x5e, val=0x0
[ 5.052872] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x5f, val=0x0
[ 5.060228] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x60, val=0x0
[ 5.067585] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x61, val=0x0
[ 5.074940] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x62, val=0x0
[ 5.082298] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x63, val=0x0
[ 5.089655] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x64, val=0x10
[ 5.097098] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x65, val=0x0
[ 5.104456] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x66, val=0x0
[ 5.111813] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x67, val=0x0
[ 5.119168] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x68, val=0x0
[ 5.126524] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x69, val=0x0
[ 5.133881] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x6a, val=0x0
[ 5.141239] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x6b, val=0x0
[ 5.148595] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x6c, val=0x0
[ 5.155951] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x6d, val=0x0
[ 5.163308] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x6e, val=0x0
[ 5.170665] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 out reg=0x6f, val=0x0
[ 5.247094] Semidrive DS941 DS948 Goodix-TS 5-0014: 941 in reg=0xf, val=0x3
[ 5.254396] Semidrive DS941 DS948 Goodix-TS 5-0014: 948 in reg=0x1f, val=0x5
[ 5.319135] Semidrive DS941 DS948 Goodix-TS 5-0014: goodix_i2c_test(): read error=-121, test=0x0
[ 5.327955] Semidrive DS941 DS948 Goodix-TS 5-0014: i2c test failed attempt 1: -121
[ 5.363130] Semidrive DS941 DS948 Goodix-TS 5-0014: goodix_i2c_test(): read error=-121, test=0x0
[ 5.371951] Semidrive DS941 DS948 Goodix-TS 5-0014: i2c test failed attempt 2: -121
[ 5.406935] Semidrive DS941 DS948 Goodix-TS 5-0014: I2C communication failure: -121
[ 5.414649] Semidrive DS941 DS948 Goodix-TS: probe of 5-0014 failed with error -121
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似乎在948上，已经将寄存器0x34设置为0x01 这意味着将写入948的端口1，而不是端口0 将寄存器0x34设置为0x00，然后在948上写入0x05来注册0x1F
在948侧将寄存器0x34设置为0x0后，无法读取948的GPIO状态
6. 尝试如下配置
执行如下程序配置
•Write( 941, 0x1E, 0x01)
•Write( 941, 0x0F,0x03)
•Write( 941, 0x1E, 0x02)
•Write( 941, 0x0F,0x03)
•Write( 948_port0, 0x34, 0x01)
•Write(948_port0, 0x1F,0x05)
•Write(948_port1, 0x34, 0x01)
•Write(948_port1, 0x1F,0x05)
可解决上述问题
