The env variable "SN" is used to store the serial number on DH electronics
SoMs. New SoMs will use the variable "dh_som_serial_number". To ensure
compatibility, these env variables are synchronized. This is achieved
using callback functions.
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Reviewed-by: Marek Vasut <marex@denx.de>
The new i.MX8M Plus DHCOM rev.200 is populated with M24C32-D EEPROM
that contains an additional write-lockable page called ID page, which
is populated with a structure containing ethernet MAC addresses, DH
item number and DH serial number.
Because the write-lockable page is not present on rev.100 i.MX8MP DHCOM
SoM, test whether EEPROM ID page exists by setting up the i2c driver.
There may be multiple EEPROMs with an ID page on this platform, always
use the first one. The evaluation of the EEPROM ID page is done in two
steps. First, the content is read and checked. This is done to cache
the content of the EEPROM ID page. Second, the content is extracted
from the EEPROM buffer by requesting it.
For the ethernet MAC address the i.MX8M Plus DHCOM currently supports
parsing address from multiple sources in the following priority order:
1) U-Boot environment 'ethaddr'/'eth1addr' environment variable
2) SoC OTP fuses
3) On-SoM EEPROM
Add support for parsing the content of this new EEPROM ID page and place
it between 2) and 3) on the priority list. The new entry is 2.5) On-SoM
EEPROM write-lockable page.
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Reviewed-by: Marek Vasut <marex@denx.de>
As part of bringing the master branch back in to next, we need to allow
for all of these changes to exist here.
Reported-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Tom Rini <trini@konsulko.com>
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay
Ethernet"' I failed to notice that b4 noticed it was based on next and
so took that as the base commit and merged that part of next to master.
This reverts commit c8ffd1356d, reversing
changes made to 2ee6f3a5f7.
Reported-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Tom Rini <trini@konsulko.com>
Check whether the ethernet interface is enabled at all before reading
MAC EEPROM. As a cost saving measure, it can happen that the MAC EEPROM
is not populated on SoMs which do not use ethernet.
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This is a starting point for unifying duplicate code in the DH board
files. The functions for setting up MAC addresses are very similar for
the i.MX6, i.MX8 and stm32mp1 based boards.
All pre-existing implementations follow the same logic:
(1) Check if ethaddr is already set in the environment
(2) If not, try to get it from a board specific location (e.g. fuse)
(3) If not, try to get it from eeprom
After this commit, (1) and (3) are implemented as common functions,
ready to be used by board specific files.
Furthermore there is an implementation of (2) for imx based boards.
Signed-off-by: Philip Oberfichtner <pro@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
