This patch adds the documentation for rockchip rk3399 dmc driver.
Signed-off-by: Lin Huang hl@rock-chips.com --- Changes in v5: -None
Changes in v4: -None
Changes in v3: -None
Changes in v2: -None
Changes in v1: -None
.../devicetree/bindings/devfreq/rk3399_dmc.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt
diff --git a/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt new file mode 100644 index 0000000..90e9581 --- /dev/null +++ b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt @@ -0,0 +1,35 @@ +* Rockchip rk3399 dmc device + +Required properties: +- compatible: Must be "rockchip,rk3399-dmc". +- devfreq-events: Node to get ddr loading, Refer to + Documentation/devicetree/bindings/devfreq/rockchip-dif.txt +- interrupts: The interrupt number to the cpu. The interrupt specifier format + depends on the interrupt controller. +- clocks: Phandles for clock specified in "clock-names" property +- clock-names : The name of clock used by the DFI, must be "pclk_ddr_mon"; +- operating-points-v2: Refer to Documentation/devicetree/bindings/power/opp.txt + for details. +- center-supply: Dmc supply node. +- status: Marks the node enabled/disabled. + +Optional properties: +- ddr_timing: ddr timing need to pass to arm trust firmware +- upthreshold: the upthreshold to simpleondeamnd policy +- downdifferential: The downdifferential to simpleondeamnd policy + +Example: + dmc: dmc { + compatible = "rockchip,rk3399-dmc"; + devfreq-events = <&dfi>; + interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&cru SCLK_DDRCLK>; + clock-names = "dmc_clk"; + ddr_timing = <&ddr_timing>; + operating-points-v2 = <&dmc_opp_table>; + center-supply = <&ppvar_centerlogic>; + upthreshold = <15>; + downdifferential = <10>; + status = "disabled"; + }; +