AM335x I2C TSC2013 issue

Waman Prabhu

Hello:

I'm using TSC2013 i2c touchscreen on am335x custom board. After integrating the respective driver and modifying the board code as shown below;

I'm unable to cat on /dev/input/event0 as well as no effect with ts_calibrate. However, when I probe the GPIO; I see the signals on the oscilloscope.

/* I2C2  Touchscreen */
#define I2C2_OMAP_DEV_NUM       3
#define I2C2_FREQ_KHZ           400

static struct pinmux_config __initdata i2c2_pin_mux[] = {
        // I2C2 IO Lines
        {"uart1_rtsn.i2c2_scl", OMAP_MUX_MODE3 | AM33XX_SLEWCTRL_SLOW | AM33XX_PULL_ENBL | AM33XX_INPUT_EN | AM33XX_PULL_UP},
        {"uart1_ctsn.i2c2_sda", OMAP_MUX_MODE3 | AM33XX_SLEWCTRL_SLOW | AM33XX_PULL_ENBL | AM33XX_INPUT_EN | AM33XX_PULL_UP},
        {"lcd_vsync.gpio2_22", OMAP_MUX_MODE7 | AM33XX_PIN_OUTPUT_PULLUP }, /* gpio2_22,PIN = 86*/
        {NULL, 0},
};

static struct i2c_board_info __initdata tsc2013_info[] = {
   {
                I2C_BOARD_INFO("tsc2013", 0x49),
                .platform_data = &tsc2013_info,
                .irq    = GPIO_TO_PIN(2, 22),
   },
};

static void __init i2c2_init(void)
{
        setup_pin_mux(i2c2_pin_mux);
        omap_register_i2c_bus(I2C2_OMAP_DEV_NUM, I2C2_FREQ_KHZ, tsc2013_info, ARRAY_SIZE(tsc2013_info));
}

[root@am335x-evm:~ ]$ dmesg | grep tsc
[    1.741912] -->tsc2013_init
[    1.744995] tsc2013_init-->i2c_add_driver
[    1.749298] -->tsc2013_probe
[    1.752349] tsc2013_probe-->tsc2013_hw_init
[    1.756774] -->tsc2013_hw_init
[    1.767333] tsc2013_probe-->tsc2013_sw_init
[    1.772064] tsc2013_i2c_write_register : CFG[62] = 0xa58c
[    1.777984] tsc2013_i2c_write_register : CFG[6a] = 0x0
[    1.783599] tsc2013_i2c_write_register : CFG[72] = 0xb81c
[    1.790222] input: tsc2013_ts as /devices/virtual/input/input0

[root@am335x-evm:~ ]$ cat /dev/input/event0
^C

[root@am335x-evm:~ ]$ ts_calibrate
Couldnt load module input
No raw modules loaded.
ts_config: Success

[root@am335x-evm:~ ]$ export TSLIB_TSDEVICE=/dev/input/event0
[root@am335x-evm:~ ]$ export TSLIB_PLUGINDIR=/usr/local/lib/ts
[root@am335x-evm:~ ]$ export TSLIB_TSEVENTTYPE=INPUT
[root@am335x-evm:~ ]$ export TSLIB_FBDEVICE=/dev/fb0
[root@am335x-evm:~ ]$ export TSLIB_CONSOLEDEVICE=none
[root@am335x-evm:~ ]$ export TSLIB_CONFFILE=/etc/ts.conf
[root@am335x-evm:~ ]$ export TSLIB_CALIBFILE=/etc/pointercal
[root@am335x-evm:~ ]$ ts_calibrate
xres = 176, yres = 220
^Csignal 2 caught

[root@am335x-evm:~ ]$

Please suggest.

Regards,

Waman Prabhu

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

Have you removed the internal ADC? What Linux version is this?

0 Waman Prabhu over 9 years ago in reply to Biser Gatchev-XID

Prodigy 235 points

Hi Biser,

Internal ADC option is open and are not connected at the moment.

Thanks,
Waman Prabhu.

0 Biser Gatchev-XID over 9 years ago in reply to Waman Prabhu

TI__Guru**** 393215 points

Please answer what Linux version you are using?

0 Waman Prabhu over 9 years ago in reply to Biser Gatchev-XID

Prodigy 235 points

3.2.0

0 Yordan Kovachev over 9 years ago in reply to Waman Prabhu

TI__Guru**** 161600 points

Hi,

The part you've shared seems correct at first glance. Just one clarification, have you added:
static struct i2c_board_info __initdata am335x_i2c0_boardinfo[] {
........
{
I2C_BOARD_INFO("tsc2013", 0x49),
.platform_data = &tsc2013_info,
},
..............
};

The above is needed to bind the used i2c controller (in your case i2c2) with the tsc2013.

Best Regards,
Yordan

0 Waman Prabhu over 9 years ago in reply to Yordan Kovachev

Prodigy 235 points

Hello Yordan,

The below is what is used for binding;
static struct i2c_board_info __initdata tsc2013_info[] = {
{
I2C_BOARD_INFO("tsc2013", 0x49),
.platform_data = &tsc2013_info,
},
};

[root@am335x-evm:~ ]$ i2cdump -f -y 3 0x49
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 02 02 02 XX XX XX XX 02 02 02 02 XX XX XX XX .???XXXX????XXXX
10: 04 06 06 06 XX XX XX XX 08 08 08 08 XX XX XX XX ????XXXX????XXXX
20: 06 03 03 03 XX XX XX XX 03 03 03 03 XX XX XX XX ????XXXX????XXXX
30: 03 01 01 01 XX XX XX XX 01 0a 0a 0a XX XX XX XX ????XXXX????XXXX
40: 0a f0 f0 f0 XX XX XX XX f0 00 00 00 XX XX XX XX ????XXXX?...XXXX
50: 00 00 00 00 XX XX XX XX 00 00 00 00 XX XX XX XX ....XXXX....XXXX
60: 00 65 65 65 XX XX XX XX 65 00 00 00 XX XX XX XX .eeeXXXXe...XXXX
70: 00 b8 b8 b8 XX XX XX XX b8 00 00 00 XX XX XX XX .???XXXX?...XXXX
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[root@am335x-evm:~ ]$

Am I missing anything else here? still ts_calibrate and cat /dev/input/event0 gets nothing.

Regards,
Waman Prabhu.

0 Waman Prabhu over 9 years ago

Prodigy 235 points

Gpio line in pin mux changed to INPUT pullup and it worked. However I'd to patch and tslib before compiling and making ts_calibrate work.

Thanks
Waman Prabhu

0 Yordan Kovachev over 9 years ago in reply to Waman Prabhu

TI__Guru**** 161600 points

Hi,

Could you share what is the current status of this problem?

Best Regards,
Yordan

0 Waman Prabhu over 9 years ago in reply to Yordan Kovachev

Prodigy 235 points

Resolved.

Thanks.

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AM335x I2C TSC2013 issue