From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
To: rjw@rjwysocki.net, viresh.kumar@linaro.org
Cc: linux-pm@vger.kernel.org,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Subject: [PATCH] Documentation: cpufreq: Additional interface for acpi-cpufreq
Date: Mon, 29 Feb 2016 13:06:25 -0800 [thread overview]
Message-ID: <1456779985-20949-1-git-send-email-srinivas.pandruvada@linux.intel.com> (raw)
Added new file for acpi-cpufreq driver, with explanation for
base_frequency.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
Documentation/cpu-freq/acpi-cpufreq-addition.txt | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
create mode 100644 Documentation/cpu-freq/acpi-cpufreq-addition.txt
diff --git a/Documentation/cpu-freq/acpi-cpufreq-addition.txt b/Documentation/cpu-freq/acpi-cpufreq-addition.txt
new file mode 100644
index 0000000..40efb22
--- /dev/null
+++ b/Documentation/cpu-freq/acpi-cpufreq-addition.txt
@@ -0,0 +1,20 @@
+Additional sysfs attribute for acpi-cpufreq
+
+In addition to the standard sysfs interface as defined in the
+user-guide.txt under section "Preferred Interface: sysfs",
+acpi-cpufreq can have following additional sysfs attribute:
+
+base_frequency: Max non-turbo frequency
+For example:
+scaling_available_frequencies displays list of available frequencies which
+can be used to set max/min or current scaling frequency.
+>cat scaling_available_frequencies
+2301000 2300000 2200000 2000000 1900000 1800000 1700000 1500000 1400000
+1300000 1100000 1000000 900000 800000 600000 500000
+If the base_frequency attribute is present, then any frequency above is
+purely opportunistic or turbo frequency. For example
+>cat base_frequency
+2200000
+Then in the above displayed list of scaling_available_frequencies, any
+frequency 2300000 or 2301000 is opportunistic or turbo frequency.
+
--
2.5.0
next reply other threads:[~2016-02-29 21:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-29 21:06 Srinivas Pandruvada [this message]
2016-02-29 23:48 ` [PATCH] Documentation: cpufreq: Additional interface for acpi-cpufreq Rafael J. Wysocki
2016-03-01 0:03 ` Srinivas Pandruvada
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