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authorAndreas Herrmann <andreas.herrmann3@amd.com>2011-05-25 20:43:31 +0200
committerJean Delvare <khali@endymion.delvare>2011-05-25 20:43:31 +0200
commit512d1027a6c58def3c2a410e8be65b7e730aad3b (patch)
treea83a92937cb27a135f56610b299dbcac5fbcaa2f /Documentation/hwmon
parent9e5813111265ad3c37a4370f0ee7e634dc07a7d6 (diff)
downloadlinux-512d1027a6c58def3c2a410e8be65b7e730aad3b.tar.bz2
hwmon: Add driver for AMD family 15h processor power information
This CPU family provides NB register values to gather following TDP information * ProcessorPwrWatts: Specifies in Watts the maximum amount of power the processor can support. * CurrPwrWatts: Specifies in Watts the current amount of power being consumed by the processor. This driver provides * power1_crit (ProcessorPwrWatts) * power1_input (CurrPwrWatts) Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
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diff --git a/Documentation/hwmon/fam15h_power b/Documentation/hwmon/fam15h_power
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+Kernel driver fam15h_power
+==========================
+
+Supported chips:
+* AMD Family 15h Processors
+
+ Prefix: 'fam15h_power'
+ Addresses scanned: PCI space
+ Datasheets:
+ BIOS and Kernel Developer's Guide (BKDG) For AMD Family 15h Processors
+ (not yet published)
+
+Author: Andreas Herrmann <andreas.herrmann3@amd.com>
+
+Description
+-----------
+
+This driver permits reading of registers providing power information
+of AMD Family 15h processors.
+
+For AMD Family 15h processors the following power values can be
+calculated using different processor northbridge function registers:
+
+* BasePwrWatts: Specifies in watts the maximum amount of power
+ consumed by the processor for NB and logic external to the core.
+* ProcessorPwrWatts: Specifies in watts the maximum amount of power
+ the processor can support.
+* CurrPwrWatts: Specifies in watts the current amount of power being
+ consumed by the processor.
+
+This driver provides ProcessorPwrWatts and CurrPwrWatts:
+* power1_crit (ProcessorPwrWatts)
+* power1_input (CurrPwrWatts)
+
+On multi-node processors the calculated value is for the entire
+package and not for a single node. Thus the driver creates sysfs
+attributes only for internal node0 of a multi-node processor.