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authorLen Brown <len.brown@intel.com>2007-04-30 23:27:43 -0400
committerLen Brown <len.brown@intel.com>2007-04-30 23:27:43 -0400
commiteaca2d3f6c4de9d4274a4e2be54c9693e76b0303 (patch)
tree9e62d1c292e0e4ffce1aea88a37f4aec5fb0281a /sound/oss/aci.h
parent11ccc0f249cb01a129f54760b8ff087f242935d4 (diff)
ACPI: delete un-reliable concept of cooling mode
The scheme where the thermal driver displayed the cooling mode /proc/acpi/thermal_zone/*/cooling_mode was flawed in two ways. First, the success of _SCP doesn't actually mean that the BIOS moved any trip points. On many BIOS, _SCP is present, but does nothing. So displaying what _SCP executed actually was wrong more times than it was right. Second, examining the relative position of the trip points when the thermal_zone is added is insufficient -- as the BIOS reserves the right to change the trip points at run-time. The only reliable way for the user to determine if the thermal zone is in active, passive, or critical mode is to examine the relative position of the trip points. The user can do this without the kernel doing it for them by looking in /proc/acpi/thermal_zone/*/trip_points New contents for /proc/acpi/thermal_zone/*/cooling_mode: If _SCP available: "0 - Active; 1 - Passive\n" If _SCP unavailable: "<setting not supported>\n" Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'sound/oss/aci.h')
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