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-NVIDIA Tegra Memory Controller device tree bindings
-===================================================
-
-memory-controller node
-----------------------
-
-Required properties:
-- compatible: Should be "nvidia,tegra<chip>-mc"
-- reg: Physical base address and length of the controller's registers.
-- 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:
- - mc: the module's clock input
-- interrupts: The interrupt outputs from the controller.
-- #iommu-cells: Should be 1. The single cell of the IOMMU specifier defines
- the SWGROUP of the master.
-
-This device implements an IOMMU that complies with the generic IOMMU binding.
-See ../iommu/iommu.txt for details.
-
-emc-timings subnode
--------------------
-
-The node should contain a "emc-timings" subnode for each supported RAM type (see field RAM_CODE in
-register PMC_STRAPPING_OPT_A).
-
-Required properties for "emc-timings" nodes :
-- nvidia,ram-code : Should contain the value of RAM_CODE this timing set is used for.
-
-timing subnode
---------------
-
-Each "emc-timings" node should contain a subnode for every supported EMC clock rate.
-
-Required properties for timing nodes :
-- clock-frequency : Should contain the memory clock rate in Hz.
-- nvidia,emem-configuration : Values to be written to the EMEM register block. For the Tegra124 SoC
-(see section "15.6.1 MC Registers" in the TRM), these are the registers whose values need to be
-specified, according to the board documentation:
-
- MC_EMEM_ARB_CFG
- MC_EMEM_ARB_OUTSTANDING_REQ
- MC_EMEM_ARB_TIMING_RCD
- MC_EMEM_ARB_TIMING_RP
- MC_EMEM_ARB_TIMING_RC
- MC_EMEM_ARB_TIMING_RAS
- MC_EMEM_ARB_TIMING_FAW
- MC_EMEM_ARB_TIMING_RRD
- MC_EMEM_ARB_TIMING_RAP2PRE
- MC_EMEM_ARB_TIMING_WAP2PRE
- MC_EMEM_ARB_TIMING_R2R
- MC_EMEM_ARB_TIMING_W2W
- MC_EMEM_ARB_TIMING_R2W
- MC_EMEM_ARB_TIMING_W2R
- MC_EMEM_ARB_DA_TURNS
- MC_EMEM_ARB_DA_COVERS
- MC_EMEM_ARB_MISC0
- MC_EMEM_ARB_MISC1
- MC_EMEM_ARB_RING1_THROTTLE
-
-Example SoC include file:
-
-/ {
- mc: memory-controller@0,70019000 {
- compatible = "nvidia,tegra124-mc";
- reg = <0x0 0x70019000 0x0 0x1000>;
- clocks = <&tegra_car TEGRA124_CLK_MC>;
- clock-names = "mc";
-
- interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
-
- #iommu-cells = <1>;
- };
-
- sdhci@0,700b0000 {
- compatible = "nvidia,tegra124-sdhci";
- ...
- iommus = <&mc TEGRA_SWGROUP_SDMMC1A>;
- };
-};
-
-Example board file:
-
-/ {
- memory-controller@0,70019000 {
- emc-timings-3 {
- nvidia,ram-code = <3>;
-
- timing-12750000 {
- clock-frequency = <12750000>;
-
- nvidia,emem-configuration = <
- 0x40040001 /* MC_EMEM_ARB_CFG */
- 0x8000000a /* MC_EMEM_ARB_OUTSTANDING_REQ */
- 0x00000001 /* MC_EMEM_ARB_TIMING_RCD */
- 0x00000001 /* MC_EMEM_ARB_TIMING_RP */
- 0x00000002 /* MC_EMEM_ARB_TIMING_RC */
- 0x00000000 /* MC_EMEM_ARB_TIMING_RAS */
- 0x00000002 /* MC_EMEM_ARB_TIMING_FAW */
- 0x00000001 /* MC_EMEM_ARB_TIMING_RRD */
- 0x00000002 /* MC_EMEM_ARB_TIMING_RAP2PRE */
- 0x00000008 /* MC_EMEM_ARB_TIMING_WAP2PRE */
- 0x00000003 /* MC_EMEM_ARB_TIMING_R2R */
- 0x00000002 /* MC_EMEM_ARB_TIMING_W2W */
- 0x00000003 /* MC_EMEM_ARB_TIMING_R2W */
- 0x00000006 /* MC_EMEM_ARB_TIMING_W2R */
- 0x06030203 /* MC_EMEM_ARB_DA_TURNS */
- 0x000a0402 /* MC_EMEM_ARB_DA_COVERS */
- 0x77e30303 /* MC_EMEM_ARB_MISC0 */
- 0x70000f03 /* MC_EMEM_ARB_MISC1 */
- 0x001f0000 /* MC_EMEM_ARB_RING1_THROTTLE */
- >;
- };
- };
- };
-};