[PATCH 16/16] dt-bindings: net: add bindings for ADIN PHY driver

[Alexandru Ardelean <alexandru.ardelean@analog.com>]

This change adds bindings for the Analog Devices ADIN PHY driver, detailing
all the properties implemented by the driver.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
 .../devicetree/bindings/net/adi,adin.yaml     | 93 +++++++++++++++++++
 MAINTAINERS                                   |  2 +
 include/dt-bindings/net/adin.h                | 26 ++++++
 3 files changed, 121 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/adi,adin.yaml
 create mode 100644 include/dt-bindings/net/adin.h

diff --git a/Documentation/devicetree/bindings/net/adi,adin.yaml b/Documentation/devicetree/bindings/net/adi,adin.yaml
new file mode 100644
index 000000000000..fcf884bb86f7
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/adi,adin.yaml
@@ -0,0 +1,93 @@
+# SPDX-License-Identifier: GPL-2.0+
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/adi,adin.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices ADIN1200/ADIN1300 PHY
+
+maintainers:
+  - Alexandru Ardelean <alexandru.ardelean@analog.com>
+
+description: |
+  Bindings for Analog Devices Industrial Ethernet PHYs
+
+properties:
+  compatible:
+    description: |
+      Compatible list, may contain "ethernet-phy-ieee802.3-c45" in which case
+      Clause 45 will be used to access device management registers. If
+      unspecified, Clause 22 will be used. Use this only when MDIO supports
+      Clause 45 access, but there is no other way to determine this.
+    enum:
+      - ethernet-phy-ieee802.3-c45
+
+  adi,phy-mode-internal:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: |
+      The internal mode of the PHY. This assumes that there is a PHY converter
+      in-between the MAC & PHY.
+    enum: [ "rgmii", "rgmii-id", "rgmii-txid", "rgmii-rxid", "rmii", "mii" ]
+
+  adi,rx-internal-delay:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      RGMII RX Clock Delay used only when PHY operates in RGMII mode (phy-mode
+      is "rgmii-id", "rgmii-rxid", "rgmii-txid") see `dt-bindings/net/adin.h`
+      default value is 0 (which represents 2 ns)
+    enum: [ 0, 1, 2, 6, 7 ]
+
+  adi,tx-internal-delay:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      RGMII TX Clock Delay used only when PHY operates in RGMII mode (phy-mode
+      is "rgmii-id", "rgmii-rxid", "rgmii-txid") see `dt-bindings/net/adin.h`
+      default value is 0 (which represents 2 ns)
+    enum: [ 0, 1, 2, 6, 7 ]
+
+  adi,fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      When operating in RMII mode, this option configures the FIFO depth.
+      See `dt-bindings/net/adin.h`.
+    enum: [ 0, 1, 2, 3, 4, 5 ]
+
+  adi,eee-enabled:
+    description: |
+      Advertise EEE capabilities on power-up/init (default disabled)
+    type: boolean
+
+  adi,disable-energy-detect:
+    description: |
+      Disables Energy Detect Powerdown Mode (default disabled, i.e energy detect
+      is enabled if this property is unspecified)
+    type: boolean
+
+  reset-gpios:
+    description: |
+      GPIO to reset the PHY
+      see Documentation/devicetree/bindings/gpio/gpio.txt.
+
+examples:
+  - |
+    ethernet-phy@0 {
+        compatible = "ethernet-phy-ieee802.3-c45";
+        reg = <0>;
+    };
+  - |
+    #include <dt-bindings/net/adin.h>
+    ethernet-phy@1 {
+        reg = <1>;
+        adi,phy-mode-internal = "rgmii-id";
+
+        adi,rx-internal-delay = <ADIN1300_RGMII_1_80_NS>;
+        adi,tx-internal-delay = <ADIN1300_RGMII_2_20_NS>;
+    };
+  - |
+    #include <dt-bindings/net/adin.h>
+    ethernet-phy@2 {
+        reg = <2>;
+        phy-mode = "rmii";
+
+        adi,fifo-depth = <ADIN1300_RMII_16_BITS>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index faf5723610c8..6ffbb266dee4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -944,6 +944,8 @@ L:	netdev@vger.kernel.org
 W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/net/phy/adin.c
+F:	include/dt-bindings/net/adin.h
+F:	Documentation/devicetree/bindings/net/adi,adin.yaml
 
 ANALOG DEVICES INC ADIS DRIVER LIBRARY
 M:	Alexandru Ardelean <alexandru.ardelean@analog.com>
diff --git a/include/dt-bindings/net/adin.h b/include/dt-bindings/net/adin.h
new file mode 100644
index 000000000000..4c3afa550c59
--- /dev/null
+++ b/include/dt-bindings/net/adin.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/**
+ * Device Tree constants for Analog Devices Industrial Ethernet PHYs
+ *
+ * Copyright 2019 Analog Devices Inc.
+ */
+
+#ifndef _DT_BINDINGS_ADIN_H
+#define _DT_BINDINGS_ADIN_H
+
+/* RGMII internal delay settings for rx and tx for ADIN1300 */
+#define ADIN1300_RGMII_1_60_NS		0x1
+#define ADIN1300_RGMII_1_80_NS		0x2
+#define	ADIN1300_RGMII_2_00_NS		0x0
+#define	ADIN1300_RGMII_2_20_NS		0x6
+#define	ADIN1300_RGMII_2_40_NS		0x7
+
+/* RMII fifo depth values */
+#define ADIN1300_RMII_4_BITS		0x0
+#define ADIN1300_RMII_8_BITS		0x1
+#define ADIN1300_RMII_12_BITS		0x2
+#define ADIN1300_RMII_16_BITS		0x3
+#define ADIN1300_RMII_20_BITS		0x4
+#define ADIN1300_RMII_24_BITS		0x5
+
+#endif
-- 
2.20.1