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Nokia RX-51: Update README.nokia_rx51 

Fix some typos, add information about setup_omap_atag, remove old suff
about ONENAND_SUPPORT and update guide for UBIFS.

Signed-off-by: Pali Rohár <pali@kernel.org>
This commit is contained in:
Pali Rohár 2020-04-01 00:35:17 +02:00 committed by Lokesh Vutla
parent 5973f90c63
commit 42e05704d8
1 changed files with 15 additions and 17 deletions
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32
doc/README.nokia_rx51
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@ -19,7 +19,7 @@ stored ATAGs (see boot order).
There is support for hardware watchdog. Hardware watchdog is started by
NOLO so u-boot must kick watchdog to prevent reboot device (but not very
often, max every 2 seconds). There is also support for framebuffer display
output with ANSI espace codes and the N900 HW keyboard input. USB tty works
output with ANSI escape codes and the N900 HW keyboard input. USB tty works
but is disabled because it prevents the current Maemo kernel from booting.
When U-Boot is starting it enable IBE bit in Auxiliary Control Register,
@ -36,7 +36,7 @@ Boot from SD or eMMC in this order:
* 1.
* 1.1 find boot.scr on first fat partition
* 1.2 find uImage on first fat parition
* 1.2 find uImage on first fat partition
* 1.3 same order for 2. - 4. fat partition
* 2. same as 1. but for ext2/3 partition
* 3. same as 1. but for ext4 partition
@ -62,21 +62,26 @@ Available additional commands/variables:
* run trymmcscriptboot - Try to load and boot script ${mmcscriptfile}
* run trymmckernboot - Try to load and boot kernel image ${mmckernfile}
* run trymmckerninitrdboot - Try to load and boot kernel image ${mmckernfile}
with initrd image ${mmcinitrdfile}
with initrd image ${mmcinitrdfile}
Additional variables for loading files from mmc:
* mmc ${mmcnum} (0 - external, 1 - internal)
* partition number ${mmcpart} (1 - 4)
* parition type ${mmctype} (fat, ext2)
* parition type ${mmctype} (fat, ext2, ext4)
Additional varuables for booting kernel:
Additional variables for booting kernel:
* setup_omap_atag - Add OMAP table into atags structure (needs maemo kernel)
* setup_console_atag - Enable serial console in OMAP table
* setup_boot_reason_atag - Change boot reason in OMAP table
* setup_boot_mode_atag - Change boot mode in OMAP table
Variable setup_omap_atag is automatically set when booting attached kernel.
When variable setup_omap_atag is set, variable setup_console_atag is unset
and u-boot standard output is set to serial then setup_console_atag is
automatically set to 1. So output from Maemo kernel would go to serial port.
USB TTY:
Maemo kernel 2.6.28 will crash if u-boot enable usb tty. So USB TTY is disabled.
@ -85,20 +90,13 @@ USB TTY:
#define CONFIG_USB_TTY
ONENAND support:
ONENAND support is disabled because not working yet and cause linux kernel to
crash or no access to mtd. For enabling ONENAND support add this line at begin
of file include/configs/nokia_rx51.h
#define ONENAND_SUPPORT
UBIFS support:
UBIFS support is disabled, because U-Boot image is too big and cannot be
flashed with attached zImage to RX-51 kernel nand area. For enabling UBIFS
support first enable ONENAND support and then add this line at begin of file
include/configs/nokia_rx51.h
support add following lines into file configs/nokia_rx51_defconfig
#define UBIFS_SUPPORT
CONFIG_CMD_UBI=y
CONFIG_CMD_UBIFS=y
CONFIG_MTD_UBI_FASTMAP=y
CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT=1