[PATCH 3/3] dt-bindings: mtd: atmel-nand: add deprecated bindings
From: Balamanikandan Gunasundar
Date: Wed Mar 20 2024 - 01:54:03 EST
Add nand bindings for legacy nand controllers. These bindings are not used
with the new device trees. This is still maintained to support legacy dt
bindings.
Signed-off-by: Balamanikandan Gunasundar <balamanikandan.gunasundar@xxxxxxxxxxxxx>
---
.../bindings/mtd/atmel-nand-deprecated.yaml | 156 +++++++++++++++++++++
.../devicetree/bindings/mtd/atmel-nand.txt | 116 ---------------
2 files changed, 156 insertions(+), 116 deletions(-)
diff --git a/Documentation/devicetree/bindings/mtd/atmel-nand-deprecated.yaml b/Documentation/devicetree/bindings/mtd/atmel-nand-deprecated.yaml
new file mode 100644
index 000000000000..c8922ab0f1d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/atmel-nand-deprecated.yaml
@@ -0,0 +1,156 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/atmel-nand-deprecated.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel NAND flash controller deprecated bindings
+
+maintainers:
+ - Balamanikandan Gunasundar <balamanikandan.gunasundar@xxxxxxxxxxxxx>
+
+description: |
+ This should not be used in the new device trees.
+
+properties:
+ compatible:
+ enum:
+ - atmel,at91rm9200-nand
+ - atmel,sama5d2-nand
+ - atmel,sama5d4-nand
+
+ reg:
+ description:
+ should specify localbus address and size used for the chip, and
+ hardware ECC controller if available. If the hardware ECC is PMECC,
+ it should contain address and size for PMECC and PMECC Error Location
+ controller. The PMECC lookup table address and size in ROM is
+ optional. If not specified, driver will build it in runtime.
+
+ atmel,nand-addr-offset:
+ description:
+ offset for the address latch.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ atmel,nand-cmd-offset:
+ description:
+ offset for the command latch.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ "#address-cells":
+ description:
+ Must be present if the device has sub-nodes representing partitions
+
+ "#size-cells":
+ description:
+ Must be present if the device has sub-nodes representing partitions.
+
+ gpios:
+ description:
+ specifies the gpio pins to control the NAND device. detect is an
+ optional gpio and may be set to 0 if not present.
+
+ atmel,nand-has-dma:
+ description:
+ support dma transfer for nand read/write.
+ $ref: /schemas/types.yaml#/definitions/flag
+
+ atmel,has-pmecc:
+ description:
+ enable Programmable Multibit ECC hardware, capable of BCH encoding
+ and decoding, on devices where it is present.
+ $ref: /schemas/types.yaml#/definitions/flag
+
+ nand-on-flash-bbt:
+ description:
+ enable on flash bbt option if not present false
+ $ref: /schemas/types.yaml#/definitions/flag
+
+ nand-ecc-mode:
+ description:
+ operation mode of the NAND ecc mode, soft by default. Supported
+ enum:
+ [none, soft, hw, hw_syndrome, hw_oob_first, soft_bch]
+ $ref: /schemas/types.yaml#/definitions/string
+
+ atmel,pmecc-cap:
+ description:
+ error correct capability for Programmable Multibit ECC Controller. If
+ the compatible string is "atmel,sama5d2-nand", 32 is also valid.
+ enum:
+ [2, 4, 8, 12, 24]
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ atmel,pmecc-sector-size:
+ description:
+ sector size for ECC computation.
+ enum:
+ [512, 1024]
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ atmel,pmecc-lookup-table-offset:
+ description:
+ includes two offsets of lookup table in ROM for different sector
+ size. First one is for sector size 512, the next is for sector size
+ 1024. If not specified, driver will build the table in runtime.
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+
+ nand-bus-width:
+ description:
+ nand bus width
+ enum:
+ [8, 16]
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+required:
+ - compatible
+ - reg
+ - atmel,nand-addr-offset
+ - atmel,nand-cmd-offset
+ - "#address-cells"
+ - "#size-cells"
+ - gpios
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ nand0: nand@40000000,0 {
+ compatible = "atmel,at91rm9200-nand";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x40000000 0x10000000
+ 0xffffe800 0x200>;
+ atmel,nand-addr-offset = <21>; /* ale */
+ atmel,nand-cmd-offset = <22>; /* cle */
+ nand-on-flash-bbt;
+ nand-ecc-mode = "soft";
+ gpios = <&pioC 13 0 /* rdy */
+ &pioC 14 0 /* nce */
+ 0 /* cd */
+ >;
+ };
+ - |
+ /* for PMECC supported chips */
+ nand1@40000000 {
+ compatible = "atmel,at91rm9200-nand";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x40000000 0x10000000 /* bus addr & size */
+ 0xffffe000 0x00000600 /* PMECC addr & size */
+ 0xffffe600 0x00000200 /* PMECC ERRLOC addr & size */
+ 0x00100000 0x00100000>; /* ROM addr & size */
+
+ atmel,nand-addr-offset = <21>; /* ale */
+ atmel,nand-cmd-offset = <22>; /* cle */
+ nand-on-flash-bbt;
+ nand-ecc-mode = "hw";
+ atmel,has-pmecc; /* enable PMECC */
+ atmel,pmecc-cap = <2>;
+ atmel,pmecc-sector-size = <512>;
+ atmel,pmecc-lookup-table-offset = <0x8000 0x10000>;
+ gpios = <&pioD 5 0 /* rdy */
+ &pioD 4 0 /* nce */
+ 0 /* cd */
+ >;
+ };
diff --git a/Documentation/devicetree/bindings/mtd/atmel-nand.txt b/Documentation/devicetree/bindings/mtd/atmel-nand.txt
deleted file mode 100644
index 1934614a9298..000000000000
--- a/Documentation/devicetree/bindings/mtd/atmel-nand.txt
+++ /dev/null
@@ -1,116 +0,0 @@
-Deprecated bindings (should not be used in new device trees):
-
-Required properties:
-- compatible: The possible values are:
- "atmel,at91rm9200-nand"
- "atmel,sama5d2-nand"
- "atmel,sama5d4-nand"
-- reg : should specify localbus address and size used for the chip,
- and hardware ECC controller if available.
- If the hardware ECC is PMECC, it should contain address and size for
- PMECC and PMECC Error Location controller.
- The PMECC lookup table address and size in ROM is optional. If not
- specified, driver will build it in runtime.
-- atmel,nand-addr-offset : offset for the address latch.
-- atmel,nand-cmd-offset : offset for the command latch.
-- #address-cells, #size-cells : Must be present if the device has sub-nodes
- representing partitions.
-
-- gpios : specifies the gpio pins to control the NAND device. detect is an
- optional gpio and may be set to 0 if not present.
-
-Optional properties:
-- atmel,nand-has-dma : boolean to support dma transfer for nand read/write.
-- nand-ecc-mode : String, operation mode of the NAND ecc mode, soft by default.
- Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first",
- "soft_bch".
-- atmel,has-pmecc : boolean to enable Programmable Multibit ECC hardware,
- capable of BCH encoding and decoding, on devices where it is present.
-- atmel,pmecc-cap : error correct capability for Programmable Multibit ECC
- Controller. Supported values are: 2, 4, 8, 12, 24. If the compatible string
- is "atmel,sama5d2-nand", 32 is also valid.
-- atmel,pmecc-sector-size : sector size for ECC computation. Supported values
- are: 512, 1024.
-- atmel,pmecc-lookup-table-offset : includes two offsets of lookup table in ROM
- for different sector size. First one is for sector size 512, the next is for
- sector size 1024. If not specified, driver will build the table in runtime.
-- nand-bus-width : 8 or 16 bus width if not present 8
-- nand-on-flash-bbt: boolean to enable on flash bbt option if not present false
-
-Nand Flash Controller(NFC) is an optional sub-node
-Required properties:
-- compatible : "atmel,sama5d3-nfc".
-- reg : should specify the address and size used for NFC command registers,
- NFC registers and NFC SRAM. NFC SRAM address and size can be absent
- if don't want to use it.
-- clocks: phandle to the peripheral clock
-Optional properties:
-- atmel,write-by-sram: boolean to enable NFC write by SRAM.
-
-Examples:
-nand0: nand@40000000,0 {
- compatible = "atmel,at91rm9200-nand";
- #address-cells = <1>;
- #size-cells = <1>;
- reg = <0x40000000 0x10000000
- 0xffffe800 0x200
- >;
- atmel,nand-addr-offset = <21>; /* ale */
- atmel,nand-cmd-offset = <22>; /* cle */
- nand-on-flash-bbt;
- nand-ecc-mode = "soft";
- gpios = <&pioC 13 0 /* rdy */
- &pioC 14 0 /* nce */
- 0 /* cd */
- >;
- partition@0 {
- ...
- };
-};
-
-/* for PMECC supported chips */
-nand0: nand@40000000 {
- compatible = "atmel,at91rm9200-nand";
- #address-cells = <1>;
- #size-cells = <1>;
- reg = < 0x40000000 0x10000000 /* bus addr & size */
- 0xffffe000 0x00000600 /* PMECC addr & size */
- 0xffffe600 0x00000200 /* PMECC ERRLOC addr & size */
- 0x00100000 0x00100000 /* ROM addr & size */
- >;
- atmel,nand-addr-offset = <21>; /* ale */
- atmel,nand-cmd-offset = <22>; /* cle */
- nand-on-flash-bbt;
- nand-ecc-mode = "hw";
- atmel,has-pmecc; /* enable PMECC */
- atmel,pmecc-cap = <2>;
- atmel,pmecc-sector-size = <512>;
- atmel,pmecc-lookup-table-offset = <0x8000 0x10000>;
- gpios = <&pioD 5 0 /* rdy */
- &pioD 4 0 /* nce */
- 0 /* cd */
- >;
- partition@0 {
- ...
- };
-};
-
-/* for NFC supported chips */
-nand0: nand@40000000 {
- compatible = "atmel,at91rm9200-nand";
- #address-cells = <1>;
- #size-cells = <1>;
- ranges;
- ...
- nfc@70000000 {
- compatible = "atmel,sama5d3-nfc";
- #address-cells = <1>;
- #size-cells = <1>;
- clocks = <&hsmc_clk>
- reg = <
- 0x70000000 0x10000000 /* NFC Command Registers */
- 0xffffc000 0x00000070 /* NFC HSMC regs */
- 0x00200000 0x00100000 /* NFC SRAM banks */
- >;
- };
-};
--
2.25.1