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Apalis TK1 V1.2A Specific Software Modifications

 
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This article describes in greater details the modifications done in software to support the Apalis TK1 V1.2A hardware revision.

As follows a summary of the hardware pin muxing changes:

Apalis X1 Pin Apalis Function TK1 SoC Ball Apalis V1.0/V1.1 TK1 SoC Ball Apalis V1.2
5 GPIO3 DDC_SCL USB_VBUS_EN0
7 GPIO4 DDC_SDA USB_VBUS_EN1
84 USBH_EN USB_VBUS_EN1 GEN2_I2C_SDA
205 I2C2_SDA (DDC) GEN2_I2C_SDA DDC_SDA
207 I2C2_SCL (DDC) GEN2_I2C_SCL DDC_SCL
274 USBO1_EN USB_VBUS_EN0 GEN2_I2C_SCL

For reference the TK1 SoC ball to GPIO name as well as number assignment of above mentioned pins:

TK1 SoC Ball TK1 SoC GPIO GPIO Number
USB_VBUS_EN0 GPIO3_PN.04 108
USB_VBUS_EN1 GPIO3_PN.05 109
GEN2_I2C_SCL GPIO3_PT.05 157
GEN2_I2C_SDA GPIO3_PT.06 158
DDC_SCL GPIO3_PV.04 172
DDC_SDA GPIO3_PV.05 173

General U-Boot support was introduced by the following commit:

http://git.toradex.com/cgit/u-boot-toradex.git/commit/?h=2016.11-toradex&id=1b121c6ab548a9af0a27876e9eaa0c654c1dc3e1

General Linux kernel support was introduced by the following commit:

http://git.toradex.com/cgit/linux-toradex.git/commit/?h=toradex_tk1_l4t_r21.5&id=9382b7e30394dd909ef0cbb610ccf06ef1863640

Different Pins for Apalis GPIO3 and Apalis GPIO4

See general changes above.

Different I2C Bus for DDC EDID

Support was introduced by the following commit:

http://git.toradex.com/cgit/linux-toradex.git/commit/?h=toradex_tk1_l4t_r21.5&id=4162e8426c79448239da03cd2ab8b951d2b49e32

An issue using HDMI on Ixora has later been fixed by the following commit:

http://git.toradex.com/cgit/linux-toradex.git/commit/?h=toradex_tk1_l4t_r21.5&id=5ed678c0982f3b611c09a4830e81672fa87372b8

New Pins for USB Power Enable Signals

See general changes above.

Support for IEEE1588

General IEEE1588 Precision Time Protocol (PTP) support (CONFIG_PTP_1588_CLOCK kernel configuration) is integrated in our Apalis TK1 BSP since the start.

As follows a summary of the available Intel I210 Software Definable Pins (SDPs):

Apalis X1 Pin Apalis Function Intel i210 SDP Pin
99 TS_3 SDP0
123 TS_4 SDP1/PCIE_DIS
135 TS_5 SDP2

Further information about how to e.g. output a IEEE1588 synchronised clock on one of those pins may be found in the following section of Intel's Ethernet Controller I210 Datasheet:

7.8.3.3.3 Synchronized Output Clock on SDP Pins

RESET_MOCI_CTRL Reset Value Low

U-Boot commit explaining the change:

http://git.toradex.com/cgit/u-boot-toradex.git/commit/?h=2016.11-toradex&id=60aae50aa5e4e27cbb2568cd40cdced6928188c5

Pre-installed software changed from embedded Linux to Toradex Easy Installer

Please find the Toradex Easy Installer for Apalis TK1 available at the official Toradex Easy Installer website(100117).