Documentation/devicetree/bindings/memory-controllers/st,stm32-fmc2-ebi.yaml

   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 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: STMicroelectronics Flexible Memory Controller 2 (FMC2)
   8
   9 description: |
  10   The FMC2 functional block makes the interface with: synchronous and
  11   asynchronous static devices (such as PSNOR, PSRAM or other memory-mapped
  12   peripherals) and NAND flash memories.
  13   Its main purposes are:
  14     - to translate AXI transactions into the appropriate external device
  15       protocol
  16     - to meet the access time requirements of the external devices
  17   All external devices share the addresses, data and control signals with the
  18   controller. Each external device is accessed by means of a unique Chip
  19   Select. The FMC2 performs only one access at a time to an external device.
  20
  21 maintainers:
  22   - Christophe Kerello <christophe.kerello@foss.st.com>
  23
  24 properties:
  25   compatible:
  26     enum:
  27       - st,stm32mp1-fmc2-ebi
  28       - st,stm32mp25-fmc2-ebi
  29
  30   reg:
  31     maxItems: 1
  32
  33   clocks:
  34     maxItems: 1
  35
  36   resets:
  37     maxItems: 1
  38
  39   power-domains:
  40     maxItems: 1
  41
  42   "#address-cells":
  43     const: 2
  44
  45   "#size-cells":
  46     const: 1
  47
  48   ranges:
  49     description: |
  50       Reflects the memory layout with four integer values per bank. Format:
  51       <bank-number> 0 <address of the bank> <size>
  52
  53 patternProperties:
  54   "^.*@[0-4],[a-f0-9]+$":
  55     additionalProperties: true
  56     type: object
  57     $ref: mc-peripheral-props.yaml#
  58
  59 required:
  60   - "#address-cells"
  61   - "#size-cells"
  62   - compatible
  63   - reg
  64   - clocks
  65   - ranges
  66
  67 additionalProperties: false
  68
  69 examples:
  70   - |
  71     #include <dt-bindings/interrupt-controller/arm-gic.h>
  72     #include <dt-bindings/clock/stm32mp1-clks.h>
  73     #include <dt-bindings/reset/stm32mp1-resets.h>
  74     memory-controller@58002000 {
  75       #address-cells = <2>;
  76       #size-cells = <1>;
  77       compatible = "st,stm32mp1-fmc2-ebi";
  78       reg = <0x58002000 0x1000>;
  79       clocks = <&rcc FMC_K>;
  80       resets = <&rcc FMC_R>;
  81
  82       ranges = <0 0 0x60000000 0x04000000>, /* EBI CS 1 */
  83                <1 0 0x64000000 0x04000000>, /* EBI CS 2 */
  84                <2 0 0x68000000 0x04000000>, /* EBI CS 3 */
  85                <3 0 0x6c000000 0x04000000>, /* EBI CS 4 */
  86                <4 0 0x80000000 0x10000000>; /* NAND */
  87
  88       psram@0,0 {
  89         compatible = "mtd-ram";
  90         reg = <0 0x00000000 0x100000>;
  91         bank-width = <2>;
  92
  93         st,fmc2-ebi-cs-transaction-type = <1>;
  94         st,fmc2-ebi-cs-address-setup-ns = <60>;
  95         st,fmc2-ebi-cs-data-setup-ns = <30>;
  96         st,fmc2-ebi-cs-bus-turnaround-ns = <5>;
  97       };
  98
  99       nand-controller@4,0 {
 100         #address-cells = <1>;
 101         #size-cells = <0>;
 102         compatible = "st,stm32mp1-fmc2-nfc";
 103         reg = <4 0x00000000 0x1000>,
 104               <4 0x08010000 0x1000>,
 105               <4 0x08020000 0x1000>,
 106               <4 0x01000000 0x1000>,
 107               <4 0x09010000 0x1000>,
 108               <4 0x09020000 0x1000>;
 109         interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
 110         dmas = <&mdma1 20 0x2 0x12000a02 0x0 0x0>,
 111                <&mdma1 20 0x2 0x12000a08 0x0 0x0>,
 112                <&mdma1 21 0x2 0x12000a0a 0x0 0x0>;
 113         dma-names = "tx", "rx", "ecc";
 114
 115         nand@0 {
 116           reg = <0>;
 117           nand-on-flash-bbt;
 118           #address-cells = <1>;
 119           #size-cells = <1>;
 120         };
 121       };
 122     };
 123
 124 ...