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| author | Vasant Hegde <hegdevasant@linux.vnet.ibm.com> | 2017-10-13 16:51:19 +0530 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-12-18 17:58:32 -0600 |
| commit | c0840ae7330fcbc310d864894f7a8b79f32ce05e (patch) | |
| tree | 48947c4c955a9237e229441fee60b9420dddc881 /doc/device-tree | |
| parent | 5110b54067c0db11122ab9a57dd2dcc56f026581 (diff) | |
| download | blackbird-skiboot-c0840ae7330fcbc310d864894f7a8b79f32ce05e.tar.gz blackbird-skiboot-c0840ae7330fcbc310d864894f7a8b79f32ce05e.zip | |
hdata: Parse SPD data
Parse SPD data and populate device tree.
list of properites parsing from SPD:
-----------------------------------
[root@ltc-wspoon dimm@d00f]# lsprop .
memory-id 0000000c (12) <-- DIMM type
product-version 00000032 (50) <-- Module Revision Code
device_type "memory-dimm-ddr4"
serial-number 15d9acb6 (366587062)
status "okay"
size 00004000 (16384)
phandle 000000bd (189)
ibm,loc-code "UOPWR.0000000-Node0-DIMM7"
part-number "36ASF2G72PZ-2G6B2 "
reg 0000d007 (53255)
name "dimm"
manufacturer-id 0000802c (32812) <-- Vendor ID, we can get vendor name from this ID
Also update documentation.
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'doc/device-tree')
| -rw-r--r-- | doc/device-tree/memory-hierarchy.rst | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/doc/device-tree/memory-hierarchy.rst b/doc/device-tree/memory-hierarchy.rst new file mode 100644 index 00000000..1da0c54d --- /dev/null +++ b/doc/device-tree/memory-hierarchy.rst @@ -0,0 +1,24 @@ +P9 memory hierarchy +------------------- +P9 Nimbus supports direct attached DDR memory through 4 DDR ports per side +of the processor. Device tree contains memory hierarchy so that one can +traverse from chip to DIMM like below: + + xscom@<addr>/mcbist@<mcbist_id>/mcs@<mcs_id>/mca@<mca_id>/dimm@<resource_id> + +Example of dimm node: +.. code-block:: dts + + dimm@d00e { + memory-id = <0xc>; /* DRAM Device Type. 0xc = DDR4 */ + product-version = <0x32>; /* Module Revision Code */ + device_type = "memory-dimm-ddr4"; + serial-number = <0x15d9ad1c>; + status = "okay"; + size = <0x4000>; + phandle = <0xd2>; + ibm,loc-code = "UOPWR.0000000-Node0-DIMM14"; + part-number = "36ASF2G72PZ-2G6B2 "; + reg = <0xd00e>; + manufacturer-id = <0x802c>; /* Vendor ID, we can get vendor name from this ID */ + }; |
