How to use & access iMX6 peripherals (Examples)

make ARCH=arm CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-none-linux-gnueabi- menuconfig

Add a star to: make menuconfig -> System Type -> Freescale MXC Implementations -> PCI Express support

Add a star to: make menuconfig -> Bus support -> Message Signaled Interrupts (MSI and MSI-X)

Add a star to: make menuconfig -> Bus support -> PCI Express Support

Add support for Realtek 8169 PCIE ethernet card

Add a star to: make menuconfig -> Device Drivers -> Network Device support -> Ethernet (1000 Mbit)

Add a star to: make menuconfig -> Device Drivers -> Network Device support -> Ethernet (1000 Mbit) -> Realtek 8169 gigabit ethernet support

Disable the on board Ethernet (FEC)

remove the star from: make menuconfig -> Device Drivers -> Network Device support -> Ethernet (10 or 100Mb)

Install iperf

#apt-get install iperf

Disconnect the onboard ethernet and run:

//start iperf server, on a local computer

fedevel@ubuntu:~$ iperf -s

//start iper client on the iMX6 Rex board

# iperf -c 192.168.0.86 -t 60 -i 10

------------------------------------------------------------

Client connecting to 192.168.0.86, TCP port 5001

TCP window size: 16.0 KByte (default)

------------------------------------------------------------

[ 3] local 192.168.0.75 port 57541 connected with 192.168.0.86 port 5001

[ ID] Interval Transfer Bandwidth

[ 3] 0.0-10.0 sec 542 MBytes 455 Mbits/sec

[ 3] 10.0-20.0 sec 544 MBytes 456 Mbits/sec

[ 3] 20.0-30.0 sec 538 MBytes 452 Mbits/sec

[ 3] 30.0-40.0 sec 617 MBytes 518 Mbits/sec

[ 3] 40.0-50.0 sec 779 MBytes 654 Mbits/sec

[ 3] 50.0-60.0 sec 774 MBytes 649 Mbits/sec

[ 3] 0.0-60.0 sec 3.71 GBytes 530 Mbits/sec

root@linaro-alip:~#

Now the other direction

//start iperf server on the iMX6 Rex board

# iperf -s

//start iperf client on a local computer

iperf -c 192.168.0.75 -t 60 -i 10

------------------------------------------------------------

Client connecting to 192.168.0.75, TCP port 5001

TCP window size: 16.0 KByte (default)

------------------------------------------------------------

[ 3] local 192.168.0.86 port 56105 connected with 192.168.0.75 port 5001

[ ID] Interval Transfer Bandwidth

[ 3] 0.0-10.0 sec 1.05 GBytes 901 Mbits/sec

[ 3] 10.0-20.0 sec 1.06 GBytes 910 Mbits/sec

[ 3] 20.0-30.0 sec 1.06 GBytes 910 Mbits/sec

[ 3] 30.0-40.0 sec 1.06 GBytes 910 Mbits/sec

[ 3] 40.0-50.0 sec 1.06 GBytes 910 Mbits/sec

[ 3] 50.0-60.0 sec 1.06 GBytes 909 Mbits/sec

[ 3] 0.0-60.0 sec 6.35 GBytes 908 Mbits/sec

fedevel@ubuntu:~$

USB

Plug in a USB memory stick, you will see a message like this (possible use dmesg command to see how your USB is detected).

# usb 1-1.1: device v17ef p3818 is not supported

sd 1:0:0:0: [sdb] No Caching mode page present

sd 1:0:0:0: [sdb] Assuming drive cache: write through

sd 1:0:0:0: [sdb] No Caching mode page present

sd 1:0:0:0: [sdb] Assuming drive cache: write through

sd 1:0:0:0: [sdb] No Caching mode page present

sd 1:0:0:0: [sdb] Assuming drive cache: write through

#

Mount the USB (in this example the USB is formatted as FAT)

# mount /dev/sdb1 /media

# ls -la /media

total 118084

drwxr-xr-x 4 root root 8192 Jan 1 1970 .

drwxr-xr-x 22 root linaro 4096 Dec 20 09:30 ..

-rwxr-xr-x 1 root root 120886176 Dec 22 15:11 78.avi

drwxr-xr-x 8 root root 8192 Oct 10 16:48 Pictures processed

drwxr-xr-x 2 root root 8192 Oct 10 16:44 iMX6 Rex Moduel Layout videos

#

Now, you can copy a video to /media and play it. This will perform a simple USB test.

SD

Plug the SD card and find out where the card is mapped. After typing dmesg at you will see something like this:

# dmesg | tail

mmc0: new high speed SD card at address aaaa

mmcblk1: mmc0:aaaa SU02G 1.84 GiB

mmcblk1: p1

Your card is mapped in /dev/mmcblk1. Create a new partition on this SD card:

# fdisk /dev/mmcblk1

Command (m for help): p

Disk /dev/mmcblk0: 1977 MB, 1977614336 bytes

4 heads, 16 sectors/track, 60352 cylinders, total 3862528 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x91fc0d77

Device Boot Start End Blocks Id System

Command (m for help): d

Selected partition 1

Command (m for help): n

Partition type:

p primary (0 primary, 0 extended, 4 free)

e extended

Select (default p):

Using default response p

Partition number (1-4, default 1):

Using default value 1

First sector (2048-3862527, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-3862527, default 3862527):

Using default value 3862527

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.

The kernel still uses the old table. The new table will be used at

the next reboot or after you run partprobe(8) or kpartx(8)

Syncing disks.

#

Format your SD card - you created partition 1 on the card which is located in /dev/mmcblk1 (or wherever the dmesg above said). The partition is then mapped in register /dev/mmcblk1p1:

# mkfs.ext3 /dev/mmcblk1p1

mke2fs 1.42.5 (29-Jul-2012)

Discarding device blocks: done

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

120720 inodes, 482815 blocks

24140 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=494927872

15 block groups

32768 blocks per group, 32768 fragments per group

8048 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912

Allocating group tables: done

Writing inode tables: done

Creating journal (8192 blocks): done

Writing superblocks and filesystem accounting information: done

#

Mount your SD card

# mount /dev/mmcblk1p1 /media/

root@linaro-alip:~# ls -la /media/

total 24

drwxr-xr-x 3 root root 4096 Dec 28 15:04 .

drwxr-xr-x 22 root linaro 4096 Dec 20 09:30 ..

drwx------ 2 root root 16384 Dec 28 15:04 lost+found

#

Now, you can copy a video to /media and play it. This will perform a simple SD test.

Preparing SD card for a filesystem

These steps described creating a new filesystem SD card on the iMX6 Rex board. Check if the link is fit on the jumper JP3. If not fit them and reset the board. Download the filesystem, the default kernel and the wifi and modem support version. Be sure, you have the latest files. Copy all these files e.g. to the USB stick. Plug the USB, insert SD card to the hinged card holder (J39). Follow these steps to prepare the SD card first. After you plug the usb find out where the USB is mapped. At the end of the list you will see something like this:

# dmesg | tail

sd 1:0:0:0: [sda] Write Protect is off

sd 1:0:0:0: [sda] Mode Sense: 43 00 00 00

sd 1:0:0:0: [sda] No Caching mode page present

sd 1:0:0:0: [sda] Assuming drive cache: write through

sd 1:0:0:0: [sda] No Caching mode page present

sd 1:0:0:0: [sda] Assuming drive cache: write through

sda: sda1

sd 1:0:0:0: [sda] No Caching mode page present

sd 1:0:0:0: [sda] Assuming drive cache: write through

sd 1:0:0:0: [sda] Attached SCSI removable disk

Your USB stick is mapped in /dev/sda1 (in this case). Mount the USB:

# mkdir /media/usbdisk

# mount /dev/sda1 /media/usbdisk

Mount the SD card:

# mkdir /media/sdcard

# mount /dev/mmcblk1p1 /media/sdcard

Unpack the filesystem:

# cd /media/sdcard

# tar -pxvzf /media/usbdisk/imx6rex-xubuntu-13-04-production-04-AUG-2014.tar

Copy kernel to the SD card:

# cp -prv /media/usbdisk/imx6rex-uImage-wifi-and-modem-no-fec-11-MAR-2014 uImage-wifi-and-modem-no-fec

# cp -prv /media/usbdisk/imx6rex-uImage-gpu-en-fec-fix-02-MAY-2014 uImage

Unmout the USB stick and the SD device:

# umount /media/usbdisk

# cd ~

# umount /media/sdcard

Listing SD card files in u-boot

You can check the content of the SD card in the u-boot with the command

> mmc dev 1; ext2ls mmc 1

Setup display outputs

To reorder your display outputs edit linux source code. Find this function at linux/arch/arm/mach-mx6/board-mx6q_sabresd.c

static struct ipuv3_fb_platform_data sabresd_fb_data[] = {

{ /*fb0*/

/*

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666,

.mode_str = "LDB-XGA",

.default_bpp = 16,

.int_clk = false,

.late_init = false,

}, {

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666,

.mode_str = "LDB-XGA",

.default_bpp = 16,

.int_clk = false,

}, {

.disp_dev = "lcd",

.interface_pix_fmt = IPU_PIX_FMT_RGB565,

.mode_str = "CLAA-WVGA",

.default_bpp = 16,

.int_clk = false,

.late_init = false,

}, {

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666,

.mode_str = "LDB-VGA",

.default_bpp = 16,

.int_clk = false,

.late_init = false,

},*/

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666,

.mode_str = "LDB-XGA",

.default_bpp = 32,

.int_clk = false,

}, {

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666,

.mode_str = "LDB-XGA",

.default_bpp = 16,

.int_clk = false,

}, {

.disp_dev = "hdmi",

.interface_pix_fmt = IPU_PIX_FMT_RGB24,

.mode_str = "1920x1080M@60",

.default_bpp = 32,

.int_clk = false,

}, {

.disp_dev = "lcd",

.interface_pix_fmt = IPU_PIX_FMT_RGB565,

.mode_str = "CLAA-WVGA",

.default_bpp = 16,

.int_clk = false,

},

};

HDMI

To setup the HDMI monitor as a default video output (e.g. x window will be shown here) use following commands. Note: If you use Linaro filesystem, use the default kernel (both was shipped on the SD card with your board).

> setenv bootargs 'console=ttymxc0,115200'

> setenv bootcmd_mmc 'run bootargs_mmc ; mmc dev 1; ext2load mmc 1 0x10800000 uImage 3850796; bootm 0x10800000'

> setenv bootargs_mmc 'setenv bootargs ${bootargs} ip=192.168.10.86:::255.255.255.0 root=/dev/mmcblk0p1 rootwait video=mxcfb0:dev=hdmi,1280x720M@60,if=RGB666 vmalloc=400M fbmem=28M fbcon=28M'

> setenv bootcmd 'ping 192.168.10.1; run bootcmd_mmc'

Setup the HDMI monitor as primary when the filesystem is downloaded from network server:

setenv bootargs_nfs 'setenv bootargs ${bootargs} root=/dev/nfs rootdelay=4 ip=192.168.0.85:::255.255.255.0 nfsroot=${serverip}:${nfsroot},v3,tcp video=mxcfb0:dev=hdmi,1280x720M@60,if=RGB24 vmalloc=400M fbmem=28M fbcon=28M'

Play a video on HDMI monitor. (Note: At the moment there is no audio support on our board, so I switch audio off)

# mplayer -vo fbdev2 -nosound dfs.avi

mplayer: could not connect to socket

mplayer: No such file or directory

Failed to open LIRC support. You will not be able to use your remote control.

Playing dfs.avi.

Detected file format: AVI format (libavformat)

[lavf] stream 0: video (msvideo1), -vid 0, Image11.avi Video #1

VIDEO: [CRAM] 320x240 16bpp 15.000 fps 0.0 kbps ( 0.0 kbyte/s)

Load subtitles in .

Opening video filter: [scale]

[ass] auto-open

==========================================================================

Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family

Asking decoder to use 4 threads if supported.

Selected video codec: [ffvideo1] vfm: ffmpeg (FFmpeg Microsoft Video 1)

==========================================================================

Audio: no sound

Starting playback...

Could not find matching colorspace - retrying with -vf scale...

Opening video filter: [scale]

Movie-Aspect is undefined - no prescaling applied.

[swscaler @ 0x2bffb980]BICUBIC scaler, from rgb555le to yuv420p using C

[swscaler @ 0x2bffb980]No accelerated colorspace conversion found from yuv420p to bgra.

VO: [fbdev2] 320x240 => 320x240 BGRA

Fontconfig warning: ignoring C.UTF-8: not a valid language tag

V: 6.7 0/ 0 1% 23% 0.0% 0 0

Exiting... (End of file)

#

Play a video on HDMI monitor when not set as a default monitor (by u-boot). List all the mapped displays:

# cat /proc/cmdline; for fb in /sys/class/graphics/fb?; do echo "----$fb"; cat $fb/name; cat $fb/mode; cat $fb/fsl_disp_*; done

According to the listed devices, find the HDMI monitor (in this case located in fb3) and enable it (or disable):

// enable fb3 display

# echo 0 > /sys/class/graphics/fb3/blank

// disable fb3 display

# echo 1 > /sys/class/graphics/fb3/blank

The device, where the video will be played, needs to be specified (in this case /dev/fb3). Play a video in a loop on selected monitor:

# mplayer -vo fbdev2:/dev/fb3 -vf scale -zoom -loop 0 -xy 1024 dfs.avi

Start the X-session on HDMI from the console (Note: These commands may not work on every filesystem - tested with Ubuntu 13.04)

# export DISPLAY=:0.0

# startx &

LVDS

Playing a video file into the LVDS display (setup in u-boot as a default)

# mplayer -vo fbdev2 -vf scale -zoom -xy 1024 78.avi

Start the X-session on LVDS from the console (Note: These commands may not work on every filesystem - tested with Ubuntu 13.04)

# export DISPLAY=:0.0

# startx &

Adding custom LVDS display support

If you need to add a custom display support, you can specify settings (e.g. the resolution or the timing) directly in the kernel. Set these parameters in the structure ldb_modedb[] which is located in the file drivers/video/mxc/ldb.c As an example we will setup the display ETV570G6DHU.

static struct fb_videomode ldb_modedb[] = {

// configuration of the other displays

{

"LDB-ETV570", 60, 640, 480,

39714, // pixel clock (in picoseconds),

144, 16, // left (left margin (in pixels)), right (right margin (in pixels))

35, 10, // upper (upper margin (in pixel lines)), lower (lower margin (in pixel lines))

30, 3, // hslen (horizontal sync length (in pixels)), vslen (vertical sync length (in pixel lines))

0,

FB_VMODE_NONINTERLACED,

FB_MODE_IS_DETAILED,},

};

You also need to include information about your display in the board file located in arch/arm/mach-mx6/board-mx6q_sabresd.c

static struct ipuv3_fb_platform_data sabresd_fb_data[] = {

// other displays data

{

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666,

.mode_str = "LDB-ETV570",

.default_bpp = 16,

.int_clk = false,

.late_init = false,

},

};

After you recompile the kernel, update uBoot parameters:

> setenv bootargs_mmc 'setenv bootargs ${bootargs} ip=dhcp root=/dev/mmcblk0p1 rootwait video=mxcfb0:dev=ldb,LDB-ETV570,if=RGB666 vmalloc=400M fbmem=28M fbcon=28M'

> saveenv; reset

!!!BE AWARE: This step is important for displays with small resolution (pixelclock lower than 38.7MHz)

The default internal LVDS clock may be for some displays with lower resolution too high. This results in a loss of the part of the screen (screen goes over the edge of the display).To correct this issue you will need to change the source of the internal LVDS clock (in the file arch/arm/mach-mx6/clock.c)

// default setting clk_set_parent(&ldb_di0_clk, &pll2_pfd_352M);

clk_set_parent(&ldb_di0_clk, &pll5_video_main_clk);

Create a partition on your SATA drive

# fdisk /dev/sda

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.

Command (m for help): p

Disk /dev/sda: 60.0 GB, 60022480896 bytes

255 heads, 63 sectors/track, 7297 cylinders, total 117231408 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000986d9

Device Boot Start End Blocks Id System

Command (m for help): n

Partition type:

p primary (0 primary, 0 extended, 4 free)

e extended

Select (default p):

Using default response p

Partition number (1-4, default 1):

Using default value 1

First sector (2048-117231407, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-117231407, default 117231407):

Using default value 117231407

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

#

Format your SATA HDD

# mkfs.ext3 /dev/sda1

mke2fs 1.42.5 (29-Jul-2012)

Discarding device blocks: done

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

3670016 inodes, 14653670 blocks

732683 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=0

448 block groups

32768 blocks per group, 32768 fragments per group

8192 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,

4096000, 7962624, 11239424

Allocating group tables: done

Writing inode tables: done

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done

#

Mount your SATA HDD to /media

# mount /dev/sda1 /media/

# ls -la /media/

total 24

drwxr-xr-x 3 root root 4096 Dec 28 14:44 .

drwxr-xr-x 22 root linaro 4096 Dec 20 09:30 ..

drwx------ 2 root root 16384 Dec 28 14:44 lost+found

#

Now, you can copy a video to /media and play it. This will perform a simple SATA test.

I2C

# i2cdetect 1 WARNING! This program can confuse your I2C bus, cause data loss and worse! I will probe file /dev/i2c-1. I will probe address range 0x03-0x77. Continue? [Y/n] y 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- 27 -- -- -- -- -- -- -- -- 30: 30 -- -- -- -- -- -- 37 -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- 48 -- 4a 4b -- -- -- -- 50: UU 51 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- -- # [/code]

Testing I2C RTC

Read RTC at address 0x51 (0xA2/0xA3)

# i2cdump -r 0-0xf 1 0x51 b

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will probe file /dev/i2c-1, address 0x51, mode byte

Probe range limited to 0x00-0x0f.

Continue? [Y/n] y

0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef

00: 08 80 85 84 83 a8 86 12 13 88 82 90 91 84 07 00 ???????????????.

#

Set Month in the RTC to December (check datasheet for register description at http://www.nxp.com/documents/data_sheet/PCF8563.pdf )

# i2cset 1 0x51 0x07 0x12

WARNING! This program can confuse your I2C bus, cause data loss and worse!

DANGEROUS! Writing to a serial EEPROM on a memory DIMM

may render your memory USELESS and make your system UNBOOTABLE!

I will write to device file /dev/i2c-1, chip address 0x51, data address

0x07, data 0x12, mode byte.

Continue? [y/N] y

#

Testing I2C GPIO Expander

Read I2C GPIO Expander at address 0x27 (0x4E/0x4F)

# i2cdump -r 0-0x7 1 0x27 b

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will probe file /dev/i2c-1, address 0x27, mode byte

Probe range limited to 0x00-0x07.

Continue? [Y/n] y

0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef

00: 47 df ff ff 00 00 ff ff G?......

#

Example of controlling user LED connected to IO1_6 (see datasheet at http://www.nxp.com/documents/data_sheet/PCA9535_PCA9535C.pdf )

//set the GPIO expander pin IO1.6 as output

# i2cset 1 0x27 0x07 0xBF

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will write to device file /dev/i2c-1, chip address 0x27, data address

0x07, data 0xbf, mode byte.

Continue? [Y/n] y

//Set the GPIO expander pin IO.6 to LOW (This will switch OFF the LED)

# i2cset 1 0x27 0x03 0xBF

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will write to device file /dev/i2c-1, chip address 0x27, data address

0x03, data 0xbf, mode byte.

Continue? [Y/n] y

#

//Set the GPIO expander pin IO.6 to HIGH (This will switch ON the LED)

# i2cset 1 0x27 0x03 0xFF

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will write to device file /dev/i2c-1, chip address 0x27, data address

0x03, data 0xff, mode byte.

Continue? [Y/n] y

#

I2C Touchscreen TSC2007

To use this TSC2007 touchscreen we need to add few lines into the boardfile located at arch/arm/mach-mx6/board-mx6q_sabresd.c You can find all the changes in this Github commit.

First you need to include the TSC2007 header file:

#include <linux/i2c/tsc2007.h>

Select the signal for the touchscreen interrupt (iMX6 use the pin NANDF_WP_B as gpio6_GPIO[9] - pad E15).

Note: SabreSD board use this pin for another purpose (SABRESD_AUX_3V15_EN or SABRESD_DISP0_WR_REVB). You may need to disable the definitions of these constant to avoid the collision (e.g. the direction of the GPIO).

#define SABRESD_TS_INT IMX_GPIO_NR(6, 9)

Add the TSC2007 data structure. Setup the parameter x_plate_ohms according to your touchscreen terminal resistance:

static struct tsc2007_platform_data tsc2007_info = {

.model = 2007,

.x_plate_ohms = 500,

};

Insert the TSC 2007 into the list of available I2C devices (we are still working with board-mx6q_sabresd.c) TSC2007 is connected to I2C2 and uses 7-bit address 0x48. This address is defined in the structure mxc_i2c1_board_info[]):

static struct i2c_board_info mxc_i2c1_board_info[] __initdata = {

// other devices

{

I2C_BOARD_INFO("tsc2007", 0x48),

.type = "tsc2007",

.platform_data = &tsc2007_info,

.irq = gpio_to_irq(SABRESD_TS_INT),

},

};

Initialize the interrupt signal (in the mx6_sabresd_board_init() function):

gpio_request(SABRESD_TS_INT, "tsc2007_irq");

gpio_direction_input(SABRESD_TS_INT);

gpio_free(SABRESD_TS_INT);

Now, we need to fix the tsc2007.c driver file located at drivers/input/touchscreen/

This is the fix: Call function init_platform_hw() only if exists (without this, kernel was crashing):

if (pdata->init_platform_hw)

pdata->init_platform_hw();

The last thing is to Enable TSC2007 in imx6_defconfig (located in arch/arm/configs/)

CONFIG_TOUCHSCREEN_TSC2007=y

or via menuconfig

make ARCH=arm CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-none-linux-gnueabi- menuconfig

Add a star to: make menuconfig -> Device Drivers -> Input device support -> Touchscreens -> TSC2007 based touchscreens

Recompile the kernel (or use this one) and start the board with the LVDS display which supports touchscreen. Note: Check if the interrupt signal is connected to the TSC2007 chip - check if resistor R174 on Rex Development BB is fitted. Power up the board and stop the booting. Setup in u-boot:

> setenv bootcmd_mmc 'run bootargs_base bootargs_mmc; mmc dev 1; ext2load mmc 1 0x10800000 imx6rex-uImage-lvds-clock-TSC2007-support-31-JUL-2014 3916620; bootm 0x10800000'

> saveenv; reset

Touchscreen calibration

Download and install xinput_calibrator tool:

# wget https://github.com/downloads/tias/xinput_calibrator/xinput_calibrator-0.7.5.tar.gz

# tar -pxvzf xinput_calibrator-0.7.5.tar.gz

# cd xinput_calibrator-0.7.5

# ./configure

# make

# sudo make install

After the installation is completed open the X session first

# export DISPLAY=:0.0

# startx &

Run the calibration now (follow the steps from the screen)

# xinput_calibrator

After the calibration is successfully finished you will see the results (something like below). Note: you may need to run the calibration twice for the correct result.

Section "InputClass"

Identifier "calibration"

MatchProduct "TSC2007 Touchscreen"

Option "Calibration" "77 3946 3915 143"

Option "SwapAxes" "1"

EndSection

In case your touchscreen is working but inverted, run the calibration one more time and it will work correctly after that.

If you want to make this calibration settings permanent create a X-window config file and copy these information there

# mkdir /etc/X11/xorg.conf.d/

# nano /etc/X11/xorg.conf.d/99-calibration.conf

When you reset the board the touchscreen is calibrated from this config file.

Test the touchscreen

Run the X-window

# export DISPLAY=:0.0

# startx &

Start input test tool and check if the dimension on console are in match with the clicked point on the display

# xinput test "TSC2007 Touchscreen"

You will see something like this (in this example we clicked in four corners of the screen):

motion a[0]=101 a[1]=70 a[2]=884

motion a[0]=100 a[1]=72 a[2]=939

motion a[2]=0

button release 1

motion a[0]=4064 a[1]=30 a[2]=73

button press 1

motion a[0]=4056 a[1]=29 a[2]=69

motion a[0]=4057 a[1]=29 a[2]=68

motion a[0]=4058 a[1]=32

motion a[0]=4059 a[1]=31 a[2]=72

motion a[0]=4060 a[1]=35 a[2]=82

motion a[0]=4061 a[1]=50 a[2]=176

motion a[2]=0

button release 1

motion a[0]=84 a[1]=4007 a[2]=815

button press 1

motion a[0]=83 a[1]=4008 a[2]=806

motion a[0]=84 a[1]=4005 a[2]=816

motion a[0]=86 a[1]=4007 a[2]=798

motion a[0]=84 a[1]=4008 a[2]=818

motion a[0]=85 a[1]=4006 a[2]=835

motion a[0]=88 a[1]=4006 a[2]=888

motion a[2]=0

button release 1

motion a[0]=4088 a[1]=4002 a[2]=804

button press 1

motion a[0]=4088 a[1]=4001 a[2]=795

motion a[0]=4088 a[1]=4003 a[2]=794

motion a[0]=4088 a[1]=4003 a[2]=787

motion a[1]=3998 a[2]=819

motion a[0]=4085 a[1]=4000 a[2]=870

motion a[2]=0

button release 1

Audio SGTL5000

Access to audio mixer:

# alsamixer

Playing a wav file

# aplay -D hw:0,0 /home/linaro/blackbird.wav

Record audio from microphone Before recording open alsamixer and set the microphone gain to the maximum level. Connect a microphone to the PINK jack and run:

# arecord -f dat -d 10 -D hw:0,0 test.wav

Play the recorded file:

# aplay -f dat test.wav

Record audio from line in In alsamixer enable Line In function and set the Capture Mux to "Line In" option. For this test, we use a loop back cable and connect Line Out -> Line In. We play an audio file to the Line Out and record it from Line in. Run these two commands in different terminals (or use '&' at the end of the first aplay command):

# aplay -D hw:0,0 /home/ubuntu/blackbird.wav

# arecord -f dat -d 10 -D hw:0,0 test.wav

Play the recorded file:

# aplay -f dat test.wav

SGTL500.c driver changes We had to do some tweaking in the audio driver. Find this file sound/soc/codecs/sgtl500.c and fix a microphone bug:

@@ -602,7 +602,7 @@ static int mixer_vol_put(struct snd_kcontrol *kcontrol,

SOC_SINGLE_TLV("Mic Volume", SGTL5000_CHIP_MIC_CTRL,

- 0, 4, 0, mic_gain_tlv),

+ 0, 3, 0, mic_gain_tlv), //!mm driver mic fix - changed from 4 to 3

According to the latest SGTL5000 we provide external digital supply (VDDD). We have to disable the internal linear VDD regulator:

@@ -996,10 +996,11 @@ static int ldo_regulator_enable(struct regulator_dev *dev)

reg = codec->hw_read(codec, SGTL5000_CHIP_ANA_POWER);

- reg |= SGTL5000_LINEREG_D_POWERUP;

+ //!mm do not enable LDO, orig: reg |= SGTL5000_LINEREG_D_POWERUP;

codec->write(codec, SGTL5000_CHIP_ANA_POWER, reg);

reg &= ~SGTL5000_LINREG_SIMPLE_POWERUP;

+ reg &= ~SGTL5000_STARTUP_POWERUP; //!mm needed if external VDDD is used

/* when internal ldo enabled, simple digital power can be disabled */

Read CPU Temperature

# cat /sys/devices/virtual/thermal/thermal_zone0/temp

Read CPU Frequency

# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq

996000

# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq

996000

GPU Test

Enable Vivante in menuconfig:

make ARCH=arm CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-none-linux-gnueabi- menuconfig

Add a star to: make menuconfig -> Device Drivers -> Graphics support -> Direct Rendering Manager (XFree86 4.1.0 and higher DRI Support)

Add a star to: make menuconfig -> Device Drivers -> Graphics support -> Direct Rendering Manager (XFree86 4.1.0 and higher DRI Support) -> Vivante GCCore

Compile new kernel and run it with the file system from here Xubuntu Raring (13.04) rootfs. Once it boots up, follow the steps here (start by number 2): I.MX6 Ubuntu 13.04 Debugging GPU Acceleration. This runs very nicely:

cd /root/gpu-viv-bin-mx6q-3.5.7-1.0.0-alpha.2-hfp/opt/viv_samples/vdk

./tutorial7

Bonie++

Install bonie++

$ cd /tmp

$ wget http://www.coker.com.au/bonnie++/bonnie++-1.03e.tgz

$ tar -zxvf bonnie++-1.03e.tgz

$ cd bonnie++-1.03e

$ ./configure

$ make

# make install

Run SATA test

$ bonnie++

Writing with putc()...done

Writing intelligently...done

Rewriting...done

Reading with getc()...done

Reading intelligently...done

start 'em...done...done...done...

Create files in sequential order...done.

Stat files in sequential order...done.

Delete files in sequential order...done.

Create files in random order...done.

Stat files in random order...done.

Delete files in random order...done.

Version 1.03e ------Sequential Output------ --Sequential Input- --Random-

-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--

Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP

ubuntu-imx6 1496M 7277 99 102772 99 62509 58 7981 99 170826 64 9136 85

------Sequential Create------ --------Random Create--------

-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--

files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP

16 16193 98 +++++ +++ 19412 99 16615 100 +++++ +++ 17947 96

ubuntu-imx6,1496M,7277,99,102772,99,62509,58,7981,99,170826,64,9135.9,85,16,16193,98,+++++,+++,19412,99,16615,100,+++++,+++,17947,96

Run SD0 test (Sandisk 16GB)

$ sudo bonnie++ -d /media/sd0/tmp_bonnie/ -u root

Using uid:0, gid:0.

Writing with putc()...done

Writing intelligently...done

Rewriting...done

Reading with getc()...done

Reading intelligently...done

start 'em...done...done...done...

Create files in sequential order...done.

Stat files in sequential order...done.

Delete files in sequential order...done.

Create files in random order...done.

Stat files in random order...done.

Delete files in random order...done.

Version 1.03e ------Sequential Output------ --Sequential Input- --Random-

-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--

Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP

ubuntu-imx6 1496M 3378 46 3016 2 3305 2 7123 87 25442 6 1222 6

------Sequential Create------ --------Random Create--------

-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--

files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP

16 16239 99 +++++ +++ 19161 99 8344 50 +++++ +++ 18723 99

ubuntu-imx6,1496M,3378,46,3016,2,3305,2,7123,87,25442,6,1222.5,6,16,16239,99,+++++,+++,19161,99,8344,50,+++++,+++,18723,99

Run SD1 test (Sandisk 8GB)

$ sudo bonnie++ -d /media/sd1/tmp_bonnie/ -u root [sudo] password for ubuntu:

Using uid:0, gid:0.

Writing with putc()...done

Writing intelligently...done

Rewriting...done

Reading with getc()...done

Reading intelligently...done

start 'em...done...done...done...

Create files in sequential order...done.

Stat files in sequential order...done.

Delete files in sequential order...done.

Create files in random order...done.

Stat files in random order...done.

Delete files in random order...done.

Version 1.03e ------Sequential Output------ --Sequential Input- --Random-

-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--

Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP

ubuntu-imx6 1496M 2944 40 2848 2 3018 1 7035 86 20955 5 895.0 4

------Sequential Create------ --------Random Create--------

-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--

files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP

16 15065 92 +++++ +++ 19361 99 16519 99 +++++ +++ 18864 100

ubuntu-imx6,1496M,2944,40,2848,2,3018,1,7035,86,20955,5,895.0,4,16,15065,92,+++++,+++,19361,99,16519,99,+++++,+++,18864,100

Wireless Modem (Telit HE910 PCIE mini)

Enable modem support in menuconfig:

make ARCH=arm CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-none-linux-gnueabi- menuconfig

Add a star to: make menuconfig -> Device Drivers -> USB support -> USB Modem (CDC ACM) support

Install serial console e.g. picocom:

sudo apt-get install picocom

Run serial console on the modem port:

picocom /dev/ttyACM3 -b 115200

Test network connection (here is a nice document with AT command examples):

AT

OK

AT+CPIN?

+CPIN: READY

OK

AT+CREG?

+CREG: 0,1

OK

AT+COPS?

+COPS: 0,0,"O2 - SK ",2

OK

Configure Audio support on the audio codec. Create a file:

# nano audio_i2c_config.sh

It is done over I2C. Write this script into audio_i2c_config.sh:

#! /bin/bash

i2cset 1 0x18 0x04 0x00

i2cset 1 0x18 0x05 0x10

i2cset 1 0x18 0x06 0x90

i2cset 1 0x18 0x07 0x00

i2cset 1 0x18 0x08 0x10

i2cset 1 0x18 0x09 0x0a

i2cset 1 0x18 0x0a 0x33

i2cset 1 0x18 0x0b 0x00

i2cset 1 0x18 0x0c 0x00

i2cset 1 0x18 0x0d 0x33

i2cset 1 0x18 0x0e 0x0c

i2cset 1 0x18 0x0f 0x0c

i2cset 1 0x18 0x10 0x09

i2cset 1 0x18 0x11 0x09

i2cset 1 0x18 0x12 0x24

i2cset 1 0x18 0x13 0x24

i2cset 1 0x18 0x14 0x40

i2cset 1 0x18 0x15 0x00

i2cset 1 0x18 0x16 0x60

i2cset 1 0x18 0x17 0x8a

Run the script (press enter until it finishes):

chmod 777 audio_i2c_config.sh

./audio_i2c_config.sh

Now configure audio support on the HE910 modem. Run these AT commands:

AT#DVI=1,2,1

OK

AT#DVIEXT=1,0,0,1,0

OK

You are ready to receive a call. Call you modem number and use "ATA" command to receive the call:

RING

ATA

OK

To change speakers volume up & down, use (see MAX9876 datasheet for more settings):

i2cset 1 0x18 0x10 0x10 //volume Left -8dB

i2cset 1 0x18 0x11 0x10 //volume Right -8dB

To change microphone sensitivity:

i2cset 1 0x18 0x12 0x60 //gain left +20dB + 20dB

i2cset 1 0x18 0x13 0x60 //gain right +20dB + 20dB

Wifi PCIE mini card Intel 4965AGN

Enable WiFi support in menuconfig:

make ARCH=arm CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-none-linux-gnueabi- menuconfig

//enable PCIE support

Add a star to: make menuconfig -> System Type -> Freescale MXC Implementations -> PCI Express support

Add a star to: make menuconfig -> Bus support -> Message Signaled Interrupts (MSI and MSI-X)

Add a star to: make menuconfig -> Bus support -> PCI Express support

//enable iwl4965 support

Add a star to: make menuconfig -> Networking support -> Wireless -> Generic IEE 802.11 Netwroking Stack (mac80211)

Add a star to: make menuconfig -> Device Drivers -> Network device support -> Wireless LAN -> Intel Wireless Wifi 4965AGN (iwl4965)

//disable FEC (the on board ethernet)

Remove the star from: make menuconfig -> Device Drivers -> Network device support -> Ethernet (10 or 100Mbit)

Compile the new kernel. Now we need to provide wifi firmware to the card:

wget http://www.imx6rex.com/wp-content/uploads/2014/03/iwlwifi-4965-ucode-228.61.2.24.tar

tar -xvf iwlwifi-4965-ucode-228.61.2.24.tar

cd iwlwifi-4965-ucode-228.61.2.24

sudo cp iwlwifi-4965-2.ucode /lib/firmware/

Reboot your board, so it loads the firmware to the card:

sudo reboot

Check if you can see your wifi. It should look like this:

ubuntu@ubuntu-imx6:~/iwlwifi-4965-ucode-228.61.2.24$ lspci

00:00.0 PCI bridge: Device 16c3:abcd (rev 01)

01:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)

Configure Wifi. First create this file:

nano wpa.conf

and insert your Wifi information there (replace ssid and psk with your Wifi settings):

network={

ssid="wifinetworkname"

psk="wifipassword"

}

Note: My router settings are - WPA PSK, aes ccm, WPA pre-shared key Run:

wpa_supplicant -B -Dwext -iwlan0 -cwpa.conf

We will configure the card with static IP. Add IP (use IP from your network) and Route (update IP according your subnet):

ifconfig wlan0 192.168.110.120

route add -net 0.0.0.0 netmask 0.0.0.0 gw 192.168.110.1

If the ping is not working, update DNS settings. Open:

sudo nano /etc/resolv.conf

and update nameserver to:

nameserver 8.8.8.8

Try to ping google:

root@ubuntu-imx6:~# ping www.google.com

PING www.google.com (62.197.198.227) 56(84) bytes of data.

64 bytes from cache.google.com (62.197.198.227): icmp_req=1 ttl=60 time=5.02 ms

64 bytes from cache.google.com (62.197.198.227): icmp_req=2 ttl=60 time=4.36 ms

64 bytes from cache.google.com (62.197.198.227): icmp_req=3 ttl=60 time=4.57 ms

This is how it should look when everything is configured properly:

ubuntu@ubuntu-imx6:~/iwlwifi-4965-ucode-228.61.2.24$ iwconfig

lo no wireless extensions.

wlan0 IEEE 802.11abgn ESSID:"s15as"

Mode:Managed Frequency:2.412 GHz Access Point: D4:CA:6D:6B:64:57

Bit Rate=65 Mb/s Tx-Power=15 dBm

Retry long limit:7 RTS thr:off Fragment thr:off

Power Management:off

Link Quality=70/70 Signal level=-38 dBm

Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0

Tx excessive retries:4684180 Invalid misc:2498 Missed beacon:0

ubuntu@ubuntu-imx6:~/iwlwifi-4965-ucode-228.61.2.24$ ifconfig

lo Link encap:Local Loopback

inet addr:127.0.0.1 Mask:255.0.0.0

UP LOOPBACK RUNNING MTU:16436 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

wlan0 Link encap:Ethernet HWaddr 00:13:e8:44:2b:51

inet addr:192.168.110.120 Bcast:192.168.110.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:2698546 errors:0 dropped:0 overruns:0 frame:0

TX packets:5038426 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:490905975 (490.9 MB) TX bytes:3272449877 (3.2 GB)

ubuntu@ubuntu-imx6:~/iwlwifi-4965-ucode-228.61.2.24$

Disconnect the onboard ethernet and test network performance:

//start iperf server, on a local computer

fedevel@ubuntu:~$ iperf -s

//start iper client on the iMX6 Rex board

ubuntu@ubuntu-imx6:~$ sudo iperf -c 192.168.10.90 -t 60 -i 10

------------------------------------------------------------

Client connecting to 192.168.10.90, TCP port 5001

TCP window size: 16.0 KByte (default)

------------------------------------------------------------

[ 3] local 192.168.110.120 port 56353 connected with 192.168.10.90 port 5001

[ ID] Interval Transfer Bandwidth

[ 3] 0.0-10.0 sec 57.9 MBytes 48.5 Mbits/sec

[ 3] 10.0-20.0 sec 51.0 MBytes 42.8 Mbits/sec

[ 3] 20.0-30.0 sec 58.1 MBytes 48.8 Mbits/sec

[ 3] 30.0-40.0 sec 56.4 MBytes 47.3 Mbits/sec

[ 3] 40.0-50.0 sec 53.6 MBytes 45.0 Mbits/sec

[ 3] 50.0-60.0 sec 60.9 MBytes 51.1 Mbits/sec

[ 3] 0.0-60.0 sec 338 MBytes 47.2 Mbits/sec

ubuntu@ubuntu-imx6:~$

and the other direction

//start iperf server on the iMX6 Rex board

# iperf -s

//start iperf client on a local computer

fedevel@fedevel-ubuntu:~/tmp/stressapptest-read-only$ iperf -c 192.168.110.120 -t 60 -i 10

------------------------------------------------------------

Client connecting to 192.168.110.120, TCP port 5001

TCP window size: 16.0 KByte (default)

------------------------------------------------------------

[ 3] local 192.168.10.90 port 38143 connected with 192.168.110.120 port 5001

[ ID] Interval Transfer Bandwidth

[ 3] 0.0-10.0 sec 49.2 MBytes 41.3 Mbits/sec

[ 3] 10.0-20.0 sec 48.1 MBytes 40.4 Mbits/sec

[ 3] 20.0-30.0 sec 50.6 MBytes 42.5 Mbits/sec

[ 3] 30.0-40.0 sec 49.5 MBytes 41.5 Mbits/sec

[ 3] 40.0-50.0 sec 49.6 MBytes 41.6 Mbits/sec

[ 3] 50.0-60.0 sec 50.3 MBytes 42.2 Mbits/sec

[ 3] 0.0-60.1 sec 297 MBytes 41.5 Mbits/sec

fedevel@fedevel-ubuntu:~/tmp/stressapptest-read-only$

Add an UART port (USB to UART support)

Enable USB to UART driver in menuconfig:

make ARCH=arm CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-none-linux-gnueabi- menuconfig

Add a star to: make menuconfig -> Device Drivers -> USB Support -> USB Serial Converter Support

Add a star to: make menuconfig -> Device Drivers -> USB Support -> USB Serial Converter Support -> USB Prolific 2303 Single Port Serial Driver

*Note: For a different USB to serial port chip (e.g. FTDI), try to find it in the "make menuconfig -> Device Drivers -> USB Support -> USB Serial Converter Support ->" list Compile the new Kernel and run it. When fully booted up, plug in your USB to serial port device. We used STLAB "U-350 USB to Serial adapter 1 Port". Run "dmesg" and check what device was created (in our case "/dev/ttyUSB0"):

# dmesg | tail -f

usb 2-1: new full speed USB device number 3 using fsl-ehci

pl2303 2-1:1.0: pl2303 converter detected

usb 2-1: pl2303 converter now attached to ttyUSB0

Done. You can now access to the serial port - here is an example of running serial console on your new serial port:

picocom /dev/ttyUSB0 -b 115200

Check all the CPU clocks and frequencies

Use this script to check all the frequencies:

#!/bin/bash

if ! mount|grep -sq '/sys/kernel/debug'; then

mount -t debugfs none /sys/kernel/debug

fi

saved_path=$PWD

printf "%-24s %-24s %3s %9s\n" "clock" "parent" "use" "rate"

for foo in $(find /sys/kernel/debug/clock -type d); do

if [ "$foo" = '/sys/kernel/debug/clock' ]; then

continue

fi

cd $foo

use="$(cat usecount)"

rate="$(cat rate)"

clk="$(basename $foo)"

cd ..

parent="$(basename $PWD)"

if [ "$parent" = 'clock' ]; then

parent=" ---"

fi

printf "%-24s %-24s %2d %10d\n" "$clk" "$parent" "$use" "$rate"

cd $saved_path

done

The result may look like this:

root@ubuntu-imx6:~# ./dump-clocks.sh

clock parent use rate

ckih_clk --- 0 0

ckih2_clk --- 0 0

ckil_clk --- 0 32768

caam_mem_clk --- 0 0

mlb150_clk --- 0 0

anaclk_1 --- 0 0

anaclk_2 --- 0 0

osc_clk --- 7 24000000

pll6_mlb150_main_clk osc_clk 0 24000000

pll7_usb_host_main_clk osc_clk 0 480000000

pll1_sys_main_clk osc_clk 1 996000000

pll1_sw_clk pll1_sys_main_clk 1 996000000

cpu_clk pll1_sw_clk 1 996000000

twd_clk cpu_clk 0 498000000

pll4_audio_main_clk osc_clk 0 175999998

asrc_clk pll4_audio_main_clk 0 175999998

gpt_clk osc_clk 1 3000000

pll8_enet_main_clk osc_clk 2 24000000

enet_clk pll8_enet_main_clk 1 50000000

sata_clk pll8_enet_main_clk 1 24000000

clko2_clk osc_clk 1 24000000

pll3_usb_otg_main_clk osc_clk 4 480000000

pll3_pfd_720M pll3_usb_otg_main_clk 0 720000000

pll3_pfd_508M pll3_usb_otg_main_clk 0 508235294

ssi1_clk pll3_pfd_508M 0 63529411

ssi2_clk pll3_pfd_508M 0 63529411

ssi3_clk pll3_pfd_508M 0 63529411

pll3_pfd_454M pll3_usb_otg_main_clk 0 454736842

spdif0_clk_0 pll3_pfd_454M 0 28421052

gpu2d_core_clk pll3_usb_otg_main_clk 0 480000000

usb_phy1_clk pll3_usb_otg_main_clk 1 1010065408

usb_phy3_clk pll3_usb_otg_main_clk 0 1010065408

usb_phy4_clk pll3_usb_otg_main_clk 0 1010065408

pll3_pfd_540M pll3_usb_otg_main_clk 1 540000000

hdmi_isfr_clk pll3_pfd_540M 1 540000000

mipi_pllref_clk pll3_pfd_540M 0 540000000

pll3_sw_clk pll3_usb_otg_main_clk 1 480000000

pll3_120M pll3_sw_clk 0 120000000

esai_clk pll3_sw_clk 0 30000000

pll3_80M pll3_sw_clk 1 80000000

uart_clk pll3_80M 1 80000000

ascan1_module_clk can_clk_root 0 30000000

can2_module_clk can_clk_root 0 30000000

ecspi0_clk pll3_60M 0 60000000

ecspi1_clk pll3_60M 0 60000000

ecspi2_clk pll3_60M 0 60000000

ecspi3_clk pll3_60M 0 60000000

ecspi4_clk pll3_60M 0 60000000

pll5_video_main_clk osc_clk 1 297000000

ipu1_di_clk_0 pll5_video_main_clk 0 99000000

ipu2_di_clk_1 pll5_video_main_clk 0 99000000

ipu1_di_clk_1 pll5_video_main_clk 1 148500000

ipu1_pixel_clk_1 ipu1_di_clk_1 1 148500000

pll2_528_bus_main_clk osc_clk 1 528000000

pll2_pfd_352M pll2_528_bus_main_clk 0 452571428

ldb_di0_clk pll2_pfd_352M 0 64653061

ipu2_di_clk_0 ldb_di0_clk 0 64653061

ldb_di1_clk pll2_pfd_352M 0 64653061

pll2_pfd_594M pll2_528_bus_main_clk 0 594000000

gpu3d_shader_clk pll2_pfd_594M 0 594000000

pll2_pfd_400M pll2_528_bus_main_clk 0 396000000

pll2_200M pll2_pfd_400M 0 198000000

mmdc_ch1_axi_clk pll2_pfd_400M 0 396000000

usdhc1_clk pll2_pfd_400M 0 198000000

usdhc2_clk pll2_pfd_400M 0 198000000

emi_clk pll2_pfd_400M 0 198000000

hsi_tx_clk pll2_pfd_400M 0 198000000

enfc_clk pll2_pfd_400M 0 19800000

gpmi_io_clk enfc_clk 0 19800000

usdhc4_clk pll2_pfd_400M 0 198000000

gpmi_bch_clk usdhc4_clk 0 198000000

usdhc3_clk pll2_pfd_400M 0 198000000

apbh_dma_clk usdhc3_clk 0 198000000

rc_serial_clk pll3_sw_clk 0 7500000

pll3_60M pll3_sw_clk 0 60000000

can_clk_root pll3_60M 0 30000000

can1_module_clk can_clk_root 0 30000000

can2_module_clk can_clk_root 0 30000000

ecspi0_clk pll3_60M 0 60000000

ecspi1_clk pll3_60M 0 60000000

ecspi2_clk pll3_60M 0 60000000

ecspi3_clk pll3_60M 0 60000000

ecspi4_clk pll3_60M 0 60000000

pll5_video_main_clk osc_clk 1 297000000

ipu1_di_clk_0 pll5_video_main_clk 0 99000000

ipu2_di_clk_1 pll5_video_main_clk 0 99000000

ipu1_di_clk_1 pll5_video_main_clk 1 148500000

ipu1_pixel_clk_1 ipu1_di_clk_1 1 148500000

pll2_528_bus_main_clk osc_clk 1 528000000

pll2_pfd_352M pll2_528_bus_main_clk 0 452571428

ldb_di0_clk pll2_pfd_352M 0 64653061

ipu2_di_clk_0 ldb_di0_clk 0 64653061

ldb_di1_clk pll2_pfd_352M 0 64653061

pll2_pfd_594M pll2_528_bus_main_clk 0 594000000

gpu3d_shader_clk pll2_pfd_594M 0 594000000

pll2_pfd_400M pll2_528_bus_main_clk 0 396000000

pll2_200M pll2_pfd_400M 0 198000000

mmdc_ch1_axi_clk pll2_pfd_400M 0 396000000

usdhc1_clk pll2_pfd_400M 0 198000000

usdhc2_clk pll2_pfd_400M 0 198000000

emi_clk pll2_pfd_400M 0 198000000

hsi_tx_clk pll2_pfd_400M 0 198000000

enfc_clk pll2_pfd_400M 0 19800000

gpmi_io_clk enfc_clk 0 19800000

usdhc4_clk pll2_pfd_400M 0 198000000

gpmi_bch_clk usdhc4_clk 0 198000000

usdhc3_clk pll2_pfd_400M 0 198000000

apbh_dma_clk usdhc3_clk 0 198000000

gpmi_apb_clk usdhc3_clk 0 198000000

gpmi_bch_apb_clk usdhc3_clk 0 198000000

periph_clk pll2_528_bus_main_clk 4 528000000

axi_clk periph_clk 1 264000000

gpu3d_axi_clk axi_clk 0 264000000

vpu_clk axi_clk 0 264000000

emi_slow_clk axi_clk 0 132000000

gpu2d_axi_clk axi_clk 0 264000000

openvg_axi_clk gpu2d_axi_clk 0 264000000

pcie_axi_clk axi_clk 0 264000000

pcie_clk pcie_axi_clk 0 264000000

pcie_ep_clk pcie_axi_clk 0 264000000

vdo_axi_clk axi_clk 0 264000000

vdoa_clk vdo_axi_clk 0 264000000

ahb_clk periph_clk 6 132000000

sdma_clk ahb_clk 0 132000000

mx6per1_clk ahb_clk 3 132000000

pl301_mx6qperl_bch mx6per1_clk 0 132000000

ipg_clk ahb_clk 5 66000000

spba_clk ipg_clk 0 66000000

iim_clk ipg_clk 1 66000000

ipg_perclk ipg_clk 1 22000000

i2c_clk_0 ipg_perclk 0 22000000

i2c_clk_1 ipg_perclk 0 22000000

i2c_clk_2 ipg_perclk 0 22000000

pwm_clk_0 ipg_perclk 1 22000000

pwm_clk_1 ipg_perclk 0 22000000

pwm_clk_2 ipg_perclk 0 22000000

pwm_clk_3 ipg_perclk 0 22000000

enet_mdc_clk ipg_clk 0 66000000

usboh3_clk ahb_clk 1 132000000

hdmi_iahb_clk ahb_clk 1 132000000

aips_tz2_clk ahb_clk 0 132000000

aips_tz1_clk ahb_clk 0 132000000

clko_clk ahb_clk 1 16500000

mmdc_ch0_axi_clk periph_clk 5 528000000

gpu3d_core_clk mmdc_ch0_axi_clk 0 528000000

perfmon0_clk mmdc_ch0_axi_clk 0 528000000

perfmon2_clk mmdc_ch0_axi_clk 0 528000000

ipu1_clk mmdc_ch0_axi_clk 1 264000000

perfmon1_clk ipu1_clk 0 264000000

ipu1_pixel_clk_0 ipu1_clk 0 0

ipu2_clk mmdc_ch0_axi_clk 0 264000000

ipu2_pixel_clk_0 ipu2_clk 0 0

ipu2_pixel_clk_1 ipu2_clk 0 0

root@ubuntu-imx6:~#

How to use & access iMX6 peripherals (Examples)

Content

DDR3 Memory test

Boot your board from a RAM filesystem

Ethernet test

PCI Express (a PCIE Ethernet card was used for this test)

USB

SD

Preparing SD card for a filesystem

Listing SD card files in u-boot

Setup display outputs

HDMI

LVDS

Adding custom LVDS display support

Create a partition on your SATA drive

I2C

Testing I2C RTC

Testing I2C GPIO Expander

I2C Touchscreen TSC2007

Touchscreen calibration

Audio SGTL5000

Read CPU Temperature

Read CPU Frequency

GPU Test

Bonie++

Run SATA test

Run SD0 test (Sandisk 16GB)

Run SD1 test (Sandisk 8GB)

Wireless Modem (Telit HE910 PCIE mini)

Wifi PCIE mini card Intel 4965AGN

Add an UART port (USB to UART support)

Check all the CPU clocks and frequencies

QUICK LINKS

CONTACT & CREDITS

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