Pointer in phytec_imx8m_detect was accessed without checking it first.
Fix this by moving the pointer check in front of any accesses.
Signed-off-by: Yannic Moog <y.moog@phytec.de>
phytec_imx8m_detect returns -1 on error, but the return type is u8
leading to 255 return values. Fix this by changing the return type to
int; there is no reason to keep it as u8 .
Signed-off-by: Yannic Moog <y.moog@phytec.de>
Add helper function to read out the PCB revision of a PHYTEC SoM.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Yannic Moog <y.moog@phytec.de>
Tested-by: Yannic Moog <y.moog@phytec.de>
Add imx8m specific detection part. Which includes checking the
EEPROM data for article number options.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Yannic Moog <y.moog@phytec.de>
Tested-by: Yannic Moog <y.moog@phytec.de>
Recent shipped PHYTEC SoMs come with an i2c EEPROM containing
information about the hardware such as board revision and variant.
This can be used for RAM detection and loading device tree overlays
during kernel start.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Yannic Moog <y.moog@phytec.de>
Tested-by: Yannic Moog <y.moog@phytec.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
