@@ -317,3 +317,7 @@
cd-gpios = <&gpio3 22 GPIO_ACTIVE_LOW>;
status = "okay";
};
+
+&cpu0 {
+ cpu0-supply = <&vdd_dvfs>;
+};
@@ -44,6 +44,17 @@
compatible = "arm,cortex-a15";
reg = <0>;
clock-frequency = <1300000000>;
+ voltage-tolerance = <1>; /* 1% */
+ clocks = <&cpg_clocks R8A7790_CLK_Z>;
+ clock-latency = <300000>; /* 300 us */
+
+ /* kHz - uV - OPPs unknown yet */
+ operating-points = <1300000 1000000>,
+ <1150000 1000000>,
+ < 975000 1000000>,
+ < 770000 1000000>,
+ < 650000 1000000>,
+ < 325000 1000000>;
};
cpu1: cpu@1 {
Add needed information inside CPU0 for the generic cpufreq-cpu0 driver. - voltage-tolerance = 1% It reflects the tolerance for the CPU voltage defined inside the OPP table. Due to the lack of proper OPP definition, use an arbitrary safe value. - clock-latency = 300 us Approximate worst-case latency to do a full DVFS transition for every OPPs. Due to the lack of HW information, use an arbitrary safe value. Note: The term transition-latency will be more accurate to define this value since the clock transition latency is not the only parameter that will define the overall DVFS transition. - operating-points = < kHz - uV > List of 6 operating points. All of them are using the same voltage since the valid Vmin voltage is not documented in the HW spec. - clocks phandle to the CPU clock source. This clock source is used for all the 4 CortexA15 located inside the same cluster. Signed-off-by: Benoit Cousson <bcousson+renesas@baylibre.com> --- arch/arm/boot/dts/r8a7790-lager.dts | 4 ++++ arch/arm/boot/dts/r8a7790.dtsi | 11 +++++++++++ 2 files changed, 15 insertions(+)