From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 Documentation/devicetree/bindings/eeprom/at25.yaml | 146 +++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/eeprom/at25.yaml

(limited to 'Documentation/devicetree/bindings/eeprom/at25.yaml')

diff --git a/Documentation/devicetree/bindings/eeprom/at25.yaml b/Documentation/devicetree/bindings/eeprom/at25.yaml
new file mode 100644
index 000000000..8b1c997ca
--- /dev/null
+++ b/Documentation/devicetree/bindings/eeprom/at25.yaml
@@ -0,0 +1,146 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/eeprom/at25.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: SPI EEPROMs or FRAMs compatible with Atmel's AT25
+
+maintainers:
+  - Christian Eggers <ceggers@arri.de>
+
+properties:
+  $nodename:
+    anyOf:
+      - pattern: "^eeprom@[0-9a-f]{1,2}$"
+      - pattern: "^fram@[0-9a-f]{1,2}$"
+
+  # There are multiple known vendors who manufacture EEPROM chips compatible
+  # with Atmel's AT25. The compatible string requires two items where the
+  # 'vendor' and 'model' parts of the first are the actual chip and the second
+  # item is fixed to "atmel,at25". Some existing bindings only have the
+  # "atmel,at25" part and should be fixed by somebody who knows vendor and
+  # product.
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - anvo,anv32e61w
+              - atmel,at25256B
+              - fujitsu,mb85rs1mt
+              - fujitsu,mb85rs64
+              - microchip,at25160bn
+              - microchip,25lc040
+              - st,m95m02
+              - st,m95256
+              - cypress,fm25
+
+          - const: atmel,at25
+
+      # Please don't use this alternative for new bindings.
+      - items:
+          - const: atmel,at25
+
+  reg:
+    maxItems: 1
+
+  pagesize:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072]
+    description:
+      Size of the eeprom page. FRAMs don't have pages.
+
+  size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Total eeprom size in bytes.
+
+  address-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 8, 9, 16, 24 ]
+    description:
+      Number of address bits.
+      For 9 bits, the MSB of the address is sent as bit 3 of the instruction
+      byte, before the address byte.
+
+  spi-cpha: true
+
+  spi-cpol: true
+
+  read-only:
+    description:
+      Disable writes to the eeprom.
+    type: boolean
+
+  wp-gpios:
+    maxItems: 1
+    description:
+      GPIO to which the write-protect pin of the chip is connected.
+
+  # Deprecated: at25,byte-len, at25,addr-mode, at25,page-size
+  at25,byte-len:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Total eeprom size in bytes. Deprecated, use "size" property instead.
+    deprecated: true
+
+  at25,addr-mode:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Addr-mode flags, as defined in include/linux/spi/eeprom.h.
+      Deprecated, use "address-width" property instead.
+    deprecated: true
+
+  at25,page-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Size of the eeprom page. Deprecated, use "pagesize" property instead.
+    deprecated: true
+
+required:
+  - compatible
+  - reg
+  - spi-max-frequency
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              const: cypress,fm25
+    then:
+      required:
+        - pagesize
+        - size
+        - address-width
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    spi0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        eeprom@0 {
+            compatible = "st,m95256", "atmel,at25";
+            reg = <0>;
+            spi-max-frequency = <5000000>;
+            spi-cpha;
+            spi-cpol;
+            wp-gpios = <&gpio1 3 0>;
+
+            pagesize = <64>;
+            size = <32768>;
+            address-width = <16>;
+        };
+
+        fram@1 {
+            compatible = "cypress,fm25", "atmel,at25";
+            reg = <1>;
+            spi-max-frequency = <40000000>;
+        };
+    };
-- 
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