1 # SPDX-License-Identifier: (GPL-2.0)
4 $id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra30-mc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: NVIDIA Tegra30 SoC Memory Controller
10 - Dmitry Osipenko <digetx@gmail.com>
11 - Jon Hunter <jonathanh@nvidia.com>
12 - Thierry Reding <thierry.reding@gmail.com>
15 Tegra30 Memory Controller architecturally consists of the following parts:
17 Arbitration Domains, which can handle a single request or response per
18 clock from a group of clients. Typically, a system has a single Arbitration
19 Domain, but an implementation may divide the client space into multiple
20 Arbitration Domains to increase the effective system bandwidth.
22 Protocol Arbiter, which manage a related pool of memory devices. A system
23 may have a single Protocol Arbiter or multiple Protocol Arbiters.
25 Memory Crossbar, which routes request and responses between Arbitration
26 Domains and Protocol Arbiters. In the simplest version of the system, the
27 Memory Crossbar is just a pass through between a single Arbitration Domain
28 and a single Protocol Arbiter.
30 Global Resources, which include things like configuration registers which
31 are shared across the Memory Subsystem.
33 The Tegra30 Memory Controller handles memory requests from internal clients
34 and arbitrates among them to allocate memory bandwidth for DDR3L and LPDDR2
39 const: nvidia,tegra30-mc
61 "^emc-timings-[0-9]+$":
65 $ref: /schemas/types.yaml#/definitions/uint32
67 Value of RAM_CODE this timing set is used for.
75 Memory clock rate in Hz.
79 nvidia,emem-configuration:
81 - $ref: /schemas/types.yaml#/definitions/uint32-array
83 Values to be written to the EMEM register block. See section
84 "18.13.1 MC Registers" in the TRM.
86 - description: MC_EMEM_ARB_CFG
87 - description: MC_EMEM_ARB_OUTSTANDING_REQ
88 - description: MC_EMEM_ARB_TIMING_RCD
89 - description: MC_EMEM_ARB_TIMING_RP
90 - description: MC_EMEM_ARB_TIMING_RC
91 - description: MC_EMEM_ARB_TIMING_RAS
92 - description: MC_EMEM_ARB_TIMING_FAW
93 - description: MC_EMEM_ARB_TIMING_RRD
94 - description: MC_EMEM_ARB_TIMING_RAP2PRE
95 - description: MC_EMEM_ARB_TIMING_WAP2PRE
96 - description: MC_EMEM_ARB_TIMING_R2R
97 - description: MC_EMEM_ARB_TIMING_W2W
98 - description: MC_EMEM_ARB_TIMING_R2W
99 - description: MC_EMEM_ARB_TIMING_W2R
100 - description: MC_EMEM_ARB_DA_TURNS
101 - description: MC_EMEM_ARB_DA_COVERS
102 - description: MC_EMEM_ARB_MISC0
103 - description: MC_EMEM_ARB_RING1_THROTTLE
107 - nvidia,emem-configuration
109 additionalProperties: false
114 additionalProperties: false
125 additionalProperties: false
129 memory-controller@7000f000 {
130 compatible = "nvidia,tegra30-mc";
131 reg = <0x7000f000 0x400>;
132 clocks = <&tegra_car 32>;
135 interrupts = <0 77 4>;
141 nvidia,ram-code = <1>;
144 clock-frequency = <667000000>;
146 nvidia,emem-configuration = <
147 0x0000000a /* MC_EMEM_ARB_CFG */
148 0xc0000079 /* MC_EMEM_ARB_OUTSTANDING_REQ */
149 0x00000003 /* MC_EMEM_ARB_TIMING_RCD */
150 0x00000004 /* MC_EMEM_ARB_TIMING_RP */
151 0x00000010 /* MC_EMEM_ARB_TIMING_RC */
152 0x0000000b /* MC_EMEM_ARB_TIMING_RAS */
153 0x0000000a /* MC_EMEM_ARB_TIMING_FAW */
154 0x00000001 /* MC_EMEM_ARB_TIMING_RRD */
155 0x00000003 /* MC_EMEM_ARB_TIMING_RAP2PRE */
156 0x0000000b /* MC_EMEM_ARB_TIMING_WAP2PRE */
157 0x00000002 /* MC_EMEM_ARB_TIMING_R2R */
158 0x00000002 /* MC_EMEM_ARB_TIMING_W2W */
159 0x00000004 /* MC_EMEM_ARB_TIMING_R2W */
160 0x00000008 /* MC_EMEM_ARB_TIMING_W2R */
161 0x08040202 /* MC_EMEM_ARB_DA_TURNS */
162 0x00130b10 /* MC_EMEM_ARB_DA_COVERS */
163 0x70ea1f11 /* MC_EMEM_ARB_MISC0 */
164 0x001f0000 /* MC_EMEM_ARB_RING1_THROTTLE */