APF28 Linux kernel status

The APF28 Linux distribution can be found here: latest stable installation tarball from SourceForge

Current version

Currently (in armadeus-5.3), supported Linux versions are: Freescale's 2.6.35.3 (version by default) and vanilla 3.1x (experimental, instructions are given here: How_to_use_vanilla_kernel_on_APF28)

• NT = Not Tested
• NA = Not Available / Not possible

APF28 (~ i.MX28 internal controllers)

Freescale's 2.6.35
Driver	Compiling ? Static / Module		Working ?	Comments
NAND Flash	OK	NA	OK	Boot linux + rootfs
DUART	OK	OK	OK	console (ttyAM0)
Ethernet	OK	NA	OK	Ethernet 0
RTC	OK	OK	OK	internal RTC
PM	OK	NA	OK	use standby mode
Battery	OK	OK	NT
Watchdog	OK	OK	OK	internal Watchdog
Security/DCP	OK	OK	OK	tested with tcrypt module

APF28Dev development baseboard

• NT = Not Tested
• NA = Not Available / Not possible

Freescale's 2.6.35
Driver	Compiling ? Static / Module		Working ?	Comments
SPI	OK	NT	OK
I2C	OK	NT	OK
MMC/SD/SDIO	OK	NT	OK
AUART	OK	OK	OK
Ethernet (1)	OK	NA	NT	2nd optionnal Ethernet port
USB OTG	OK	OK	OK	OTG and DR modes
USB HOST	OK	NT	OK
ADC (LRADC)	OK	OK	OK
ADC (HSADC)	NT	NT	NT
PWM	OK	OK	OK
LCD	OK	NT	OK
Backlight	OK	OK	OK
LW700 LCD	OK	NT	OK
MT035 LCD	OK	NT	OK	remove linux patch 459
Touchscreen	OK	OK	OK
PXP	OK	NT	NT
Digital Audio	OK	OK	NT
CAN Bus	OK	OK	~OK	bitrate changing from userspace not functionnal !
User LED	OK	NT	OK	GPIO_LEDS
User Button	OK	OK	OK	GPIO_keys, can wakeup the board from standby mode
Power Button	OK	NT	OK	OK only when the system is powered by a battery. The board reboots automatically when powered by 5V or USB. That's a chipset feature that cannot be disabled.