Problem with Mainline Kernel 4.6.0-rc3 for Olimex A20 Micro!

[mandar.khire]

Hi,
I am trying to use RTC DS1307 which I externally connected to I2C pins & trying to use as it should work at time of kernel expansion or within kernel.
So for that I tried various ways.
Now I download Mainline kernel 4.6.0-rc3.
I follows http://linux-sunxi.org/Mainline_Kernel_Howto
I also follows http://linux-sunxi.org/Mainline_U-boot
I use RFS from working pre-compiled SD card image.

I got log as follows:-

Code Select Expand


switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
Found U-Boot script /boot.scr
reading /boot.scr
343 bytes read in 34 ms (9.8 KiB/s)
## Executing script at 43100000
reading sun7i-a20-olinuxino-micro.dtb
30655 bytes read in 38 ms (787.1 KiB/s)
reading zImage
3408336 bytes read in 196 ms (16.6 MiB/s)
Kernel image @ 0x42000000 [ 0x000000 - 0x3401d0 ]
## Flattened Device Tree blob at 43000000
   Booting using the fdt blob at 0x43000000
EHCI failed to shut down host controller.
   Loading Device Tree to 49ff5000, end 49fff7be ... OK


I use boot arguments as follows:-

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baudrate=115200
boot_a_script=load ${devtype} ${devnum}:${distro_bootpart} ${scriptaddr} ${prefix}${script}; source ${scriptaddr}
boot_extlinux=sysboot ${devtype} ${devnum}:${distro_bootpart} any ${scriptaddr} ${prefix}extlinux/extlinux.conf
boot_net_usb_start=usb start
boot_prefixes=/ /boot/
boot_script_dhcp=boot.scr.uimg
boot_scripts=boot.scr.uimg boot.scr
boot_targets=fel mmc0 mmc1 scsi0 usb0 pxe dhcp
bootcmd=run distro_bootcmd
bootcmd_dhcp=run boot_net_usb_start; if dhcp ${scriptaddr} ${boot_script_dhcp}; then source ${scriptaddr}; fi
bootcmd_fel=if test -n ${fel_booted} && test -n ${fel_scriptaddr}; then echo '(FEL boot)'; source ${fel_scriptaddr}; fi
bootcmd_mmc0=setenv devnum 0; run mmc_boot
bootcmd_mmc1=setenv devnum 1; run mmc_boot
bootcmd_pxe=run boot_net_usb_start; dhcp; if pxe get; then pxe boot; fi
bootcmd_scsi0=setenv devnum 0; run scsi_boot
bootcmd_usb0=setenv devnum 0; run usb_boot
bootdelay=2
bootm_size=0xa000000
console=ttyS0,115200
dfu_alt_info_ram=kernel ram 0x42000000 0x1000000;fdt ram 0x43000000 0x100000;ramdisk ram 0x43300000 0x4000000
distro_bootcmd=setenv scsi_need_init; for target in ${boot_targets}; do run bootcmd_${target}; done
ethaddr=02:83:0a:c2:0e:0a
fdt_addr_r=0x43000000
fdtcontroladdr=7af35ec0
fdtfile=sun7i-a20-olinuxino-micro.dtb
kernel_addr_r=0x42000000
mmc_boot=if mmc dev ${devnum}; then setenv devtype mmc; run scan_dev_for_boot_part; fi
preboot=usb start
pxefile_addr_r=0x43200000
ramdisk_addr_r=0x43300000
scan_dev_for_boot=echo Scanning ${devtype} ${devnum}:${distro_bootpart}...; for prefix in ${boot_prefixes}; do run scan_dev_for_extlie
scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devplist || setenv devplist 1; for distro_bootpae
scan_dev_for_extlinux=if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}extlinux/extlinux.conf; then echo Found ${prefix}exi
scan_dev_for_scripts=for script in ${boot_scripts}; do if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${script}; then ece
scriptaddr=0x43100000
scsi_boot=run scsi_init; if scsi dev ${devnum}; then setenv devtype scsi; run scan_dev_for_boot_part; fi
scsi_init=if ${scsi_need_init}; then setenv scsi_need_init false; scsi scan; fi
serial#=165166830ac20e0a
stderr=serial,vga
stdin=serial,usbkbd
stdout=serial,vga
usb_boot=usb start; if usb dev ${devnum}; then setenv devtype usb; run scan_dev_for_boot_part; fi

Environment size: 2813/131068 bytes


Before stop booting process I got few lines as log:-

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CPU:   Allwinner A20 (SUN7I)
I2C:   ready
DRAM:  1 GiB
MMC:   SUNXI SD/MMC: 0, SUNXI SD/MMC: 1
*** Warning - bad CRC, using default environment

Setting up a 1024x768 vga console (overscan 0x0)
In:    serial
Out:   vga
Err:   vga
SCSI:  SUNXI SCSI INIT
SATA link 0 timeout.
AHCI 0001.0100 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: ncq stag pm led clo only pmp pio slum part ccc apst
Net:   eth0: ethernet@01c50000
starting USB...
USB0:   USB EHCI 1.00
USB1:   USB OHCI 1.0
USB2:   USB EHCI 0.00
USB3:   USB OHCI 0.0
scanning bus 0 for devices... 1 USB Device(s) found
scanning bus 2 for devices... 1 USB Device(s) found
Hit any key to stop autoboot:  0
=>


I tried Mainline kernel's 3.16.0-rc6 version then it runs properly but newer version not running.

Need help!

[mhaas]

What exactly are you trying to achieve there? What are your expected results and what are your actual results?

Are you sure you are running a mainline u-boot? edit: not sure if that actually matters, but since you said you were trying to run mainline u-boot, I figured I'd ask..

edit2: unrelated to your kernel problems, but what pins are you trying to use for i2c? Some are not enabled by default, at least on the a20-olinuxino-lime2.

edit3: For I2C trouble, see https://www.olimex.com/forum/index.php?topic=5248.0

[Lurch]

Last, but not least .. DS1307 is a 5V part. You will need 5V / 3.3V conversion on I2C to work with DS1307.

[martinayotte]

You can also switch the DS1307 with a PCF8563, it is pin compatible and can run from 1.8V.