xref: /linux/Documentation/devicetree/bindings/memory-controllers/st,stm32-fmc2-ebi.yaml (revision 8a922b7728a93d837954315c98b84f6b78de0c4f) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/memory-controllers/st,stm32-fmc2-ebi.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: STMicroelectronics Flexible Memory Controller 2 (FMC2)
8
9description: |
10  The FMC2 functional block makes the interface with: synchronous and
11  asynchronous static devices (such as PSNOR, PSRAM or other memory-mapped
12  peripherals) and NAND flash memories.
13  Its main purposes are:
14    - to translate AXI transactions into the appropriate external device
15      protocol
16    - to meet the access time requirements of the external devices
17  All external devices share the addresses, data and control signals with the
18  controller. Each external device is accessed by means of a unique Chip
19  Select. The FMC2 performs only one access at a time to an external device.
20
21maintainers:
22  - Christophe Kerello <christophe.kerello@foss.st.com>
23
24properties:
25  compatible:
26    const: st,stm32mp1-fmc2-ebi
27
28  reg:
29    maxItems: 1
30
31  clocks:
32    maxItems: 1
33
34  resets:
35    maxItems: 1
36
37  "#address-cells":
38    const: 2
39
40  "#size-cells":
41    const: 1
42
43  ranges:
44    description: |
45      Reflects the memory layout with four integer values per bank. Format:
46      <bank-number> 0 <address of the bank> <size>
47
48patternProperties:
49  "^.*@[0-4],[a-f0-9]+$":
50    type: object
51    $ref: mc-peripheral-props.yaml#
52
53required:
54  - "#address-cells"
55  - "#size-cells"
56  - compatible
57  - reg
58  - clocks
59  - ranges
60
61additionalProperties: false
62
63examples:
64  - |
65    #include <dt-bindings/interrupt-controller/arm-gic.h>
66    #include <dt-bindings/clock/stm32mp1-clks.h>
67    #include <dt-bindings/reset/stm32mp1-resets.h>
68    memory-controller@58002000 {
69      #address-cells = <2>;
70      #size-cells = <1>;
71      compatible = "st,stm32mp1-fmc2-ebi";
72      reg = <0x58002000 0x1000>;
73      clocks = <&rcc FMC_K>;
74      resets = <&rcc FMC_R>;
75
76      ranges = <0 0 0x60000000 0x04000000>, /* EBI CS 1 */
77               <1 0 0x64000000 0x04000000>, /* EBI CS 2 */
78               <2 0 0x68000000 0x04000000>, /* EBI CS 3 */
79               <3 0 0x6c000000 0x04000000>, /* EBI CS 4 */
80               <4 0 0x80000000 0x10000000>; /* NAND */
81
82      psram@0,0 {
83        compatible = "mtd-ram";
84        reg = <0 0x00000000 0x100000>;
85        bank-width = <2>;
86
87        st,fmc2-ebi-cs-transaction-type = <1>;
88        st,fmc2-ebi-cs-address-setup-ns = <60>;
89        st,fmc2-ebi-cs-data-setup-ns = <30>;
90        st,fmc2-ebi-cs-bus-turnaround-ns = <5>;
91      };
92
93      nand-controller@4,0 {
94        #address-cells = <1>;
95        #size-cells = <0>;
96        compatible = "st,stm32mp1-fmc2-nfc";
97        reg = <4 0x00000000 0x1000>,
98              <4 0x08010000 0x1000>,
99              <4 0x08020000 0x1000>,
100              <4 0x01000000 0x1000>,
101              <4 0x09010000 0x1000>,
102              <4 0x09020000 0x1000>;
103        interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
104        dmas = <&mdma1 20 0x2 0x12000a02 0x0 0x0>,
105               <&mdma1 20 0x2 0x12000a08 0x0 0x0>,
106               <&mdma1 21 0x2 0x12000a0a 0x0 0x0>;
107        dma-names = "tx", "rx", "ecc";
108
109        nand@0 {
110          reg = <0>;
111          nand-on-flash-bbt;
112          #address-cells = <1>;
113          #size-cells = <1>;
114        };
115      };
116    };
117
118...
119