summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt
diff options
context:
space:
mode:
authorDaniel Vetter <daniel.vetter@ffwll.ch>2015-09-30 09:47:41 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2015-09-30 09:47:41 +0300
commit44cc6c08da0b6c8321c6740bbb6a0c6feb45b2c2 (patch)
treeec97ee26c9715f8da24377e9cacc63261b0aa2ab /Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt
parent40a4a5727f21a0e439d317aa99953e24467605eb (diff)
parent2d4df13c0f9ef56452b1d9a9016cb3946e17bfe5 (diff)
downloadlinux-44cc6c08da0b6c8321c6740bbb6a0c6feb45b2c2.tar.xz
Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next
Backmerge to catch up with 4.3. slightly more involved conflict in the irq code, but nothing beyond adjacent changes. Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt')
-rw-r--r--Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt44
1 files changed, 44 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt b/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt
new file mode 100644
index 000000000000..b1669fbfb740
--- /dev/null
+++ b/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt
@@ -0,0 +1,44 @@
+Tegra124 CPU frequency scaling driver bindings
+----------------------------------------------
+
+Both required and optional properties listed below must be defined
+under node /cpus/cpu@0.
+
+Required properties:
+- clocks: Must contain an entry for each entry in clock-names.
+ See ../clocks/clock-bindings.txt for details.
+- clock-names: Must include the following entries:
+ - cpu_g: Clock mux for the fast CPU cluster.
+ - cpu_lp: Clock mux for the low-power CPU cluster.
+ - pll_x: Fast PLL clocksource.
+ - pll_p: Auxiliary PLL used during fast PLL rate changes.
+ - dfll: Fast DFLL clocksource that also automatically scales CPU voltage.
+- vdd-cpu-supply: Regulator for CPU voltage
+
+Optional properties:
+- clock-latency: Specify the possible maximum transition latency for clock,
+ in unit of nanoseconds.
+
+Example:
+--------
+cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a15";
+ reg = <0>;
+
+ clocks = <&tegra_car TEGRA124_CLK_CCLK_G>,
+ <&tegra_car TEGRA124_CLK_CCLK_LP>,
+ <&tegra_car TEGRA124_CLK_PLL_X>,
+ <&tegra_car TEGRA124_CLK_PLL_P>,
+ <&dfll>;
+ clock-names = "cpu_g", "cpu_lp", "pll_x", "pll_p", "dfll";
+ clock-latency = <300000>;
+ vdd-cpu-supply: <&vdd_cpu>;
+ };
+
+ <...>
+};