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| author | Alistair Popple <alistair@popple.id.au> | 2017-08-18 15:19:55 +1000 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-08-30 13:50:04 +1000 |
| commit | d5fa66c74a194022a5254622a58f967ac4955bc3 (patch) | |
| tree | 491256a51917355c9fb87f87427de754434233f7 /doc | |
| parent | e1e962475e1e16e50a1aa192f08d20e9d66d10e4 (diff) | |
| download | skiboot-d5fa66c74a194022a5254622a58f967ac4955bc3.zip skiboot-d5fa66c74a194022a5254622a58f967ac4955bc3.tar.gz skiboot-d5fa66c74a194022a5254622a58f967ac4955bc3.tar.bz2 | |
hw/npu2.c: Add ibm, nvlink-speed device-tree property
NVLink2 links can support multiple different speeds. However the device driver
has no way of determining which speed was programmed so pass it down as a device
tree property.
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Acked-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/device-tree/nvlink.rst | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/device-tree/nvlink.rst b/doc/device-tree/nvlink.rst index 6ce44e9..9f3fecb 100644 --- a/doc/device-tree/nvlink.rst +++ b/doc/device-tree/nvlink.rst @@ -105,7 +105,12 @@ Emulated PCI device bindings vendor-id = <0x1014>; ibm,gpu = <0x100002f7>; /* phandle pointing the associated GPU PCI device node */ memory-region = <0x10000abc>; /* phandle pointing to the GPU memory */ - phandle = <0x100002fc>; + ibm,nvlink-speed = <0x1>; + + ; Denotes the speed the link is running at: + ; 0x3 == 20 Gbps, 0x8 = 25.78125 Gbps, 0x9 == 25.00000 Gbps + + phandle = <0x100002fc>; }; pci@1 { |