SPDMEM(4) | Device Drivers Manual | SPDMEM(4) |
spdmem
— Generic
Memory Module Serial Presence Detect
spdmem* at iic? addr 0x50
spdmem* at iic? addr 0x51
spdmem* at iic? addr 0x52
spdmem* at iic? addr 0x53
spdmem* at iic? addr 0x54
spdmem* at iic? addr 0x55
spdmem* at iic? addr 0x56
spdmem* at iic? addr 0x57
The spdmem
driver provides support for
generic memory module Serial Presence Detect. During kernel boot it displays
module type, and where possible, the size and rated speed of the memory
module. Additional information such as bank configuration and width is
printed if the kernel is booted in verbose mode.
The Serial Presence Detect data for each memory module is also
made accessible to user mode via
sysctl(8). An entry for each
spdmem
device is created under the
hw
top-level MIB.
Some SPD ROMs also have a temperature sensor. It's supported by sdtemp(4).
The spdmem
driver first appeared in
NetBSD 5.0.
The spdmem
driver was written by
Nicolas Joly
<njoly@pasteur.fr>
with additional work by Paul Goyette
<paul@whooppee.com>.
July 27, 2016 | NetBSD 10.99 |