dt-bindings: soc: Add Cirrus EP93xx

Add device tree bindings for the Cirrus Logic EP93xx SoC.
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Documentation/devicetree/bindings/arm/cirrus/cirrus,ep9301.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/cirrus/cirrus,ep9301.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cirrus Logic EP93xx platforms
+
+description:
+  The EP93xx SoC is a ARMv4T-based with 200 MHz ARM9 CPU.
+
+maintainers:
+  - Alexander Sverdlin <alexander.sverdlin@gmail.com>
+  - Nikita Shubin <nikita.shubin@maquefel.me>
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: The TS-7250 is a compact, full-featured Single Board
+          Computer (SBC) based upon the Cirrus EP9302 ARM9 CPU
+        items:
+          - const: technologic,ts7250
+          - const: cirrus,ep9301
+
+      - description: The Liebherr BK3 is a derivate from ts7250 board
+        items:
+          - const: liebherr,bk3
+          - const: cirrus,ep9301
+
+      - description: EDB302 is an evaluation board by Cirrus Logic,
+          based on a Cirrus Logic EP9302 CPU
+        items:
+          - const: cirrus,edb9302
+          - const: cirrus,ep9301
+
+additionalProperties: true

Documentation/devicetree/bindings/soc/cirrus/cirrus,ep9301-syscon.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/cirrus/cirrus,ep9301-syscon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cirrus Logic EP93xx Platforms System Controller
+
+maintainers:
+  - Alexander Sverdlin <alexander.sverdlin@gmail.com>
+  - Nikita Shubin <nikita.shubin@maquefel.me>
+
+description: |
+  Central resources are controlled by a set of software-locked registers,
+  which can be used to prevent accidental accesses. Syscon generates
+  the various bus and peripheral clocks and controls the system startup
+  configuration.
+
+  The System Controller (Syscon) provides:
+  - Clock control
+  - Power management
+  - System configuration management
+
+  Syscon registers are common for all EP93xx SoC's, through some actual peripheral
+  may be missing depending on actual SoC model.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - cirrus,ep9302-syscon
+              - cirrus,ep9307-syscon
+              - cirrus,ep9312-syscon
+              - cirrus,ep9315-syscon
+          - const: cirrus,ep9301-syscon
+          - const: syscon
+      - items:
+          - const: cirrus,ep9301-syscon
+          - const: syscon
+
+  reg:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 1
+
+  clocks:
+    items:
+      - description: reference clock
+
+patternProperties:
+  '^pins-':
+    type: object
+    description: pin node
+    $ref: /schemas/pinctrl/pinmux-node.yaml
+
+    properties:
+      function:
+        enum: [ spi, ac97, i2s, pwm, keypad, pata, lcd, gpio ]
+
+      groups:
+        enum: [ ssp, ac97, i2s_on_ssp, i2s_on_ac97, pwm1, gpio1agrp,
+                gpio2agrp, gpio3agrp, gpio4agrp, gpio6agrp, gpio7agrp,
+                rasteronsdram0grp, rasteronsdram3grp, keypadgrp, idegrp ]
+
+    required:
+      - function
+      - groups
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - "#clock-cells"
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    syscon@80930000 {
+      compatible = "cirrus,ep9301-syscon", "syscon";
+      reg = <0x80930000 0x1000>;
+
+      #clock-cells = <1>;
+      clocks = <&xtali>;
+
+      spi_default_pins: pins-spi {
+        function = "spi";
+        groups = "ssp";
+      };
+    };

include/dt-bindings/clock/cirrus,ep9301-syscon.h

+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+#ifndef DT_BINDINGS_CIRRUS_EP93XX_CLOCK_H
+#define DT_BINDINGS_CIRRUS_EP93XX_CLOCK_H
+
+#define EP93XX_CLK_PLL1		0
+#define EP93XX_CLK_PLL2		1
+
+#define EP93XX_CLK_FCLK		2
+#define EP93XX_CLK_HCLK		3
+#define EP93XX_CLK_PCLK		4
+
+#define EP93XX_CLK_UART		5
+#define EP93XX_CLK_SPI		6
+#define EP93XX_CLK_PWM		7
+#define EP93XX_CLK_USB		8
+
+#define EP93XX_CLK_M2M0		9
+#define EP93XX_CLK_M2M1		10
+
+#define EP93XX_CLK_M2P0		11
+#define EP93XX_CLK_M2P1		12
+#define EP93XX_CLK_M2P2		13
+#define EP93XX_CLK_M2P3		14
+#define EP93XX_CLK_M2P4		15
+#define EP93XX_CLK_M2P5		16
+#define EP93XX_CLK_M2P6		17
+#define EP93XX_CLK_M2P7		18
+#define EP93XX_CLK_M2P8		19
+#define EP93XX_CLK_M2P9		20
+
+#define EP93XX_CLK_UART1	21
+#define EP93XX_CLK_UART2	22
+#define EP93XX_CLK_UART3	23
+
+#define EP93XX_CLK_ADC		24
+#define EP93XX_CLK_ADC_EN	25
+
+#define EP93XX_CLK_KEYPAD	26
+
+#define EP93XX_CLK_VIDEO	27
+
+#define EP93XX_CLK_I2S_MCLK	28
+#define EP93XX_CLK_I2S_SCLK	29
+#define EP93XX_CLK_I2S_LRCLK	30
+
+#endif /* DT_BINDINGS_CIRRUS_EP93XX_CLOCK_H */