bindings/memory-controllers/exynos5422-dmc.txt

1 * Exynos5422 frequency and voltage scaling for Dynamic Memory Controller device
3 The Samsung Exynos5422 SoC has DMC (Dynamic Memory Controller) to which the DRAM
4 memory chips are connected. The driver is to monitor the controller in runtime
5 and switch frequency and voltage. To monitor the usage of the controller in
7 is able to measure the current load of the memory.
9 switch the DMC and memory frequency.
12 - compatible: Should be "samsung,exynos5422-dmc".
13 - clocks : list of clock specifiers, must contain an entry for each
14   required entry in clock-names for CLK_FOUT_SPLL, CLK_MOUT_SCLK_SPLL,
17 - clock-names : should include "fout_spll", "mout_sclk_spll", "ff_dout_spll2",
20 - devfreq-events : phandles for PPMU devices connected to this DMC.
21 - vdd-supply : phandle for voltage regulator which is connected.
22 - reg : registers of two CDREX controllers.
23 - operating-points-v2 : phandle for OPPs described in v2 definition.
24 - device-handle : phandle of the connected DRAM memory device. For more
27 - devfreq-events : phandles of the PPMU events used by the controller.
28 - samsung,syscon-clk : phandle of the clock register set used by the controller,
35 - interrupt-parent : The parent interrupt controller.
36 - interrupts : Contains the IRQ line numbers for the DMC internal performance
38   interrupt line(s) in the interrupt-parent controller.
39 - interrupt-names : IRQ names "drex_0" and "drex_1", the order should be the
45 		compatible = "samsung,exynos-ppmu";
48 		clock-names = "ppmu";
50 			ppmu_event_dmc0_0: ppmu-event3-dmc0_0 {
51 				event-name = "ppmu-event3-dmc0_0";
56 	dmc: memory-controller@10c20000 {
57 		compatible = "samsung,exynos5422-dmc";
67 		clock-names = "fout_spll",
75 		operating-points-v2 = <&dmc_opp_table>;
76 		devfreq-events = <&ppmu_event3_dmc0_0>,	<&ppmu_event3_dmc0_1>,
78 		device-handle = <&samsung_K3QF2F20DB>;
79 		vdd-supply = <&buck1_reg>;
80 		samsung,syscon-clk = <&clock>;
81 		interrupt-parent = <&combiner>;
83 		interrupt-names = "drex_0", "drex_1";