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Document the cpufreq_drv_type() method and info-only flag.

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This commit is contained in:
njl 2005-02-18 00:28:52 +00:00
parent 18a69f46e3
commit d49b95d8a8
1 changed files with 15 additions and 6 deletions
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21
share/man/man4/cpufreq.4
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@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd February 14, 2005
.Dd February 17, 2005
.Dt CPUFREQ 4
.Os
.Sh NAME
@ -45,9 +45,10 @@
.Fa "device_t dev"
.Fa "struct cf_setting *sets"
.Fa "int *count"
.Fa "int *type"
.Fc
.Ft int
.Fn cpufreq_drv_type "device_t dev" "int *type"
.Ft int
.Fn cpufreq_drv_set "device_t dev" "const struct cf_setting *set"
.Ft int
.Fn cpufreq_drv_get "device_t dev" "struct cf_setting *set"
@ -182,8 +183,9 @@ Kernel drivers offering hardware-specific CPU frequency control export
their individual settings through the
.Nm
driver interface.
This involves implementing three methods:
This involves implementing these methods:
.Fn cpufreq_drv_settings ,
.Fn cpufreq_drv_type ,
.Fn cpufreq_drv_set ,
and
.Fn cpufreq_drv_get .
@ -218,12 +220,19 @@ If the driver offers more settings than
.Fa count
will allow, it should return
.Er E2BIG .
The driver sets
.Fa type
to the type of settings it offers, either
.Pp
The
.Fn cpufreq_drv_type
method indicates the type of settings it offers, either
.Dv CPUFREQ_TYPE_ABSOLUTE
or
.Dv CPUFREQ_TYPE_RELATIVE .
Additionally, the driver may set the
.Dv CPUFREQ_FLAG_INFO_ONLY
flag if the settings it provides are information for other drivers only
and cannot be passed to
.Fn cpufreq_drv_set
to activate them.
.Pp
The
.Fn cpufreq_drv_set