k3-socinfo.c driver assumes silicon revisions for every platform are
incremental and one-to-one, corresponding to JTAG_ID's variant field:
1.0, 2.0 etc. This assumption is wrong for SoCs such as J721E, where the
variant field to revision mapping is 1.0, 1.1. Further, there are SoCs
such as AM65x where the sub-variant version requires custom decoding of
other registers.
Address this by using conditional handling per JTAG ID that requires an
exception with J721E as the first example. To facilitate this
conversion, use macros to identify the JTAG_ID part number and map them
to predefined string array.
Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
Co-developed-by: Thejasvi Konduru <t-konduru@ti.com>
Signed-off-by: Thejasvi Konduru <t-konduru@ti.com>
Link: https://lore.kernel.org/r/20231016101608.993921-4-n-francis@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>
Avoid overriding the return value and make sure the right error code
is reflected. If the part is none of the identified list present in
k3_soc_ids[], return -ENODEV.
Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
Link: https://lore.kernel.org/r/20231016101608.993921-3-n-francis@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>
This adds JTAG ID info for the AM62PX so as to enable SoC detection in
kernel.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Praneeth Bajjuri <praneeth@ti.com>
Link: https://lore.kernel.org/r/20230811170127.250733-1-vigneshr@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>
The Texas Instruments K3 Multicore SoC platforms have chipid module which
is represented by CTRLMMR_xxx_JTAGID register and contains information
about SoC id and revision.
Bits:
31-28 VARIANT Device variant
27-12 PARTNO Part number
11-1 MFG Indicates TI as manufacturer (0x17)
1 Always 1
This patch adds corresponding driver to identify the TI K3 SoC family and
revision, and registers this information with the SoC bus. It is available
under /sys/devices/soc0/ for user space, and can be checked, where needed,
in Kernel using soc_device_match().
Identification is done by:
- checking MFG to be TI ID
- retrieving Device variant (revision)
- retrieving Part number and convert it to the family
- retrieving machine from DT "/model"
Example J721E:
# cat /sys/devices/soc0/{machine,family,revision}
Texas Instruments K3 J721E SoC
J721E
SR1.0
Example AM65x:
# cat /sys/devices/soc0/{machine,family,revision}
Texas Instruments AM654 Base Board
AM65X
SR1.0
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
