[PATCH v2 1/2] dt-bindings: mtd: marvell-nand: Convert to YAML DT scheme
Vadym Kochan
vadym.kochan at plvision.eu
Sat Oct 22 01:26:25 PDT 2022
Switch the DT binding to a YAML schema to enable the DT validation.
Dropped deprecated compatibles and properties described in txt file.
Signed-off-by: Vadym Kochan <vadym.kochan at plvision.eu>
---
v2:
1) Fixed warning by yamllint with incorrect indentation for compatible list
.../bindings/mtd/marvell,nand-controller.yaml | 199 ++++++++++++++++++
.../devicetree/bindings/mtd/marvell-nand.txt | 126 -----------
2 files changed, 199 insertions(+), 126 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml
delete mode 100644 Documentation/devicetree/bindings/mtd/marvell-nand.txt
diff --git a/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml b/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml
new file mode 100644
index 000000000000..b3f4de7478cc
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml
@@ -0,0 +1,199 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/marvell,nand-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell NAND Flash Controller (NFC)
+
+maintainers:
+ - Miquel Raynal <miquel.raynal at bootlin.com>
+
+properties:
+
+ compatible:
+ oneOf:
+ - items:
+ - const: marvell,armada-8k-nand-controller
+ - const: marvell,armada370-nand-controller
+ - const: marvell,armada370-nand-controller
+ - const: marvell,pxa3xx-nand-controller
+
+ reg:
+ maxItems: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ minItems: 1
+ maxItems: 2
+ description: |
+ Shall reference the NAND controller clocks, the second one is
+ is only needed for the Armada 7K/8K SoCs
+
+ clock-names:
+ items:
+ - const: core
+ - const: reg
+ description: |
+ Mandatory if there is a second clock, in this case there
+ should be one clock named "core" and another one named "reg"
+
+ dmas:
+ maxItems: 1
+ description: rxtx DMA channel
+
+ dma-names:
+ items:
+ - const: rxtx
+
+ marvell,system-controller:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description: Syscon node that handles NAND controller related registers
+
+patternProperties:
+ "^nand@[0-3]$":
+ type: object
+ properties:
+
+ reg:
+ minimum: 0
+ maximum: 3
+
+ nand-rb:
+ minimum: 0
+ maximum: 1
+
+ nand-ecc-strength:
+ enum: [1, 4, 8]
+
+ nand-on-flash-bbt: true
+
+ nand-ecc-mode: true
+
+ nand-ecc-algo:
+ description: |
+ This property is essentially useful when not using hardware ECC.
+ Howerver, it may be added when using hardware ECC for clarification
+ but will be ignored by the driver because ECC mode is chosen depending
+ on the page size and the strength required by the NAND chip.
+ This value may be overwritten with nand-ecc-strength property.
+
+ nand-ecc-step-size:
+ const: 512
+ description: |
+ Marvell's NAND flash controller does use fixed strength
+ (1-bit for Hamming, 16-bit for BCH), so the actual step size
+ will shrink or grow in order to fit the required strength.
+ Step sizes are not completely random for all and follow certain
+ patterns described in AN-379, "Marvell SoC NFC ECC".
+
+ label:
+ $ref: /schemas/types.yaml#/definitions/string
+
+ partitions:
+ type: object
+ $ref: "/schemas/mtd/partitions/partition.yaml"
+
+ marvell,nand-keep-config:
+ description: |
+ Orders the driver not to take the timings from the core and
+ leaving them completely untouched. Bootloader timings will then
+ be used.
+ $ref: /schemas/types.yaml#/definitions/flag
+
+ marvell,nand-enable-arbiter:
+ description: |
+ To enable the arbiter, all boards blindly used it,
+ this bit was set by the bootloader for many boards and even if
+ it is marked reserved in several datasheets, it might be needed to set
+ it (otherwise it is harmless) so whether or not this property is set,
+ the bit is selected by the driver.
+ $ref: /schemas/types.yaml#/definitions/flag
+ deprecated: true
+
+ additionalProperties: false
+
+ required:
+ - reg
+ - nand-rb
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+ - interrupts
+ - clocks
+
+allOf:
+ - $ref: "nand-controller.yaml#"
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: marvell,pxa3xx-nand-controller
+ then:
+ required:
+ - dmas
+ - dma-names
+ else:
+ properties:
+ dmas: false
+ dma-names: false
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: marvell,armada-8k-nand-controller
+ then:
+ required:
+ - marvell,system-controller
+ else:
+ properties:
+ marvell,system-controller: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ nand_controller: nand-controller at d0000 {
+ compatible = "marvell,armada370-nand-controller";
+ reg = <0xd0000 0x54>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&coredivclk 0>;
+
+ nand at 0 {
+ reg = <0>;
+ label = "main-storage";
+ nand-rb = <0>;
+ nand-ecc-mode = "hw";
+ marvell,nand-keep-config;
+ nand-on-flash-bbt;
+ nand-ecc-strength = <4>;
+ nand-ecc-step-size = <512>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition at 0 {
+ label = "Rootfs";
+ reg = <0x00000000 0x40000000>;
+ };
+ };
+ };
+ };
diff --git a/Documentation/devicetree/bindings/mtd/marvell-nand.txt b/Documentation/devicetree/bindings/mtd/marvell-nand.txt
deleted file mode 100644
index a2d9a0f2b683..000000000000
--- a/Documentation/devicetree/bindings/mtd/marvell-nand.txt
+++ /dev/null
@@ -1,126 +0,0 @@
-Marvell NAND Flash Controller (NFC)
-
-Required properties:
-- compatible: can be one of the following:
- * "marvell,armada-8k-nand-controller"
- * "marvell,armada370-nand-controller"
- * "marvell,pxa3xx-nand-controller"
- * "marvell,armada-8k-nand" (deprecated)
- * "marvell,armada370-nand" (deprecated)
- * "marvell,pxa3xx-nand" (deprecated)
- Compatibles marked deprecated support only the old bindings described
- at the bottom.
-- reg: NAND flash controller memory area.
-- #address-cells: shall be set to 1. Encode the NAND CS.
-- #size-cells: shall be set to 0.
-- interrupts: shall define the NAND controller interrupt.
-- clocks: shall reference the NAND controller clocks, the second one is
- is only needed for the Armada 7K/8K SoCs
-- clock-names: mandatory if there is a second clock, in this case there
- should be one clock named "core" and another one named "reg"
-- marvell,system-controller: Set to retrieve the syscon node that handles
- NAND controller related registers (only required with the
- "marvell,armada-8k-nand[-controller]" compatibles).
-
-Optional properties:
-- label: see partition.txt. New platforms shall omit this property.
-- dmas: shall reference DMA channel associated to the NAND controller.
- This property is only used with "marvell,pxa3xx-nand[-controller]"
- compatible strings.
-- dma-names: shall be "rxtx".
- This property is only used with "marvell,pxa3xx-nand[-controller]"
- compatible strings.
-
-Optional children nodes:
-Children nodes represent the available NAND chips.
-
-Required properties:
-- reg: shall contain the native Chip Select ids (0-3).
-- nand-rb: see nand-controller.yaml (0-1).
-
-Optional properties:
-- marvell,nand-keep-config: orders the driver not to take the timings
- from the core and leaving them completely untouched. Bootloader
- timings will then be used.
-- label: MTD name.
-- nand-on-flash-bbt: see nand-controller.yaml.
-- nand-ecc-mode: see nand-controller.yaml. Will use hardware ECC if not specified.
-- nand-ecc-algo: see nand-controller.yaml. This property is essentially useful when
- not using hardware ECC. Howerver, it may be added when using hardware
- ECC for clarification but will be ignored by the driver because ECC
- mode is chosen depending on the page size and the strength required by
- the NAND chip. This value may be overwritten with nand-ecc-strength
- property.
-- nand-ecc-strength: see nand-controller.yaml.
-- nand-ecc-step-size: see nand-controller.yaml. Marvell's NAND flash controller does
- use fixed strength (1-bit for Hamming, 16-bit for BCH), so the actual
- step size will shrink or grow in order to fit the required strength.
- Step sizes are not completely random for all and follow certain
- patterns described in AN-379, "Marvell SoC NFC ECC".
-
-See Documentation/devicetree/bindings/mtd/nand-controller.yaml for more details on
-generic bindings.
-
-
-Example:
-nand_controller: nand-controller at d0000 {
- compatible = "marvell,armada370-nand-controller";
- reg = <0xd0000 0x54>;
- #address-cells = <1>;
- #size-cells = <0>;
- interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&coredivclk 0>;
-
- nand at 0 {
- reg = <0>;
- label = "main-storage";
- nand-rb = <0>;
- nand-ecc-mode = "hw";
- marvell,nand-keep-config;
- nand-on-flash-bbt;
- nand-ecc-strength = <4>;
- nand-ecc-step-size = <512>;
-
- partitions {
- compatible = "fixed-partitions";
- #address-cells = <1>;
- #size-cells = <1>;
-
- partition at 0 {
- label = "Rootfs";
- reg = <0x00000000 0x40000000>;
- };
- };
- };
-};
-
-
-Note on legacy bindings: One can find, in not-updated device trees,
-bindings slightly different than described above with other properties
-described below as well as the partitions node at the root of a so
-called "nand" node (without clear controller/chip separation).
-
-Legacy properties:
-- marvell,nand-enable-arbiter: To enable the arbiter, all boards blindly
- used it, this bit was set by the bootloader for many boards and even if
- it is marked reserved in several datasheets, it might be needed to set
- it (otherwise it is harmless) so whether or not this property is set,
- the bit is selected by the driver.
-- num-cs: Number of chip-select lines to use, all boards blindly set 1
- to this and for a reason, other values would have failed. The value of
- this property is ignored.
-
-Example:
-
- nand0: nand at 43100000 {
- compatible = "marvell,pxa3xx-nand";
- reg = <0x43100000 90>;
- interrupts = <45>;
- dmas = <&pdma 97 0>;
- dma-names = "rxtx";
- #address-cells = <1>;
- marvell,nand-keep-config;
- marvell,nand-enable-arbiter;
- num-cs = <1>;
- /* Partitions (optional) */
- };
--
2.17.1
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