[PATCH v4 2/5] dt-bindings: mfd: Add support for Airoha EN7581 GPIO System Controller

[Lorenzo Bianconi <lorenzo@xxxxxxxxxx>]

From: Christian Marangi <ansuelsmth@xxxxxxxxx>

Add support for Airoha EN7581 GPIO System Controller which provide a
register map for controlling the GPIO, pinctrl and PWM of the SoC.

Schema define cells for both gpio/interrupt controller and PWM.
Moreover it provides a dedicated pinctrl node for pins and config
definitions.

Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx>
Co-developed-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
 .../bindings/mfd/airoha,en7581-gpio-sysctl.yaml    | 433 +++++++++++++++++++++
 1 file changed, 433 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/airoha,en7581-gpio-sysctl.yaml b/Documentation/devicetree/bindings/mfd/airoha,en7581-gpio-sysctl.yaml
new file mode 100644
index 000000000000..98396db40e67
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/airoha,en7581-gpio-sysctl.yaml
@@ -0,0 +1,433 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/airoha,en7581-gpio-sysctl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha EN7581 GPIO System Controller
+
+maintainers:
+  - Christian Marangi <ansuelsmth@xxxxxxxxx>
+  - Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
+
+description:
+  Airoha EN7581 SoC GPIO system controller which provided a register map
+  for controlling the GPIO, pins and PWM of the SoC.
+
+properties:
+  compatible:
+    const: airoha,en7581-gpio-sysctl
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+  "#pwm-cells":
+    const: 3
+
+  pinctrl:
+    type: object
+
+    $ref: /schemas/pinctrl/pinctrl.yaml
+
+    patternProperties:
+      '-pins$':
+        type: object
+
+        patternProperties:
+          '^mux(-|$)':
+            type: object
+
+            description:
+              pinmux configuration nodes.
+
+            $ref: /schemas/pinctrl/pinmux-node.yaml
+
+            properties:
+              function:
+                description:
+                  A string containing the name of the function to mux to the group.
+                enum: [pon, tod_1pps, sipo, mdio, uart, i2c, jtag, pcm, spi,
+                       pcm_spi, i2s, emmc, pnand, pcie_reset, pwm, phy1_led0,
+                       phy2_led0, phy3_led0, phy4_led0, phy1_led1, phy2_led1,
+                       phy3_led1, phy4_led1]
+
+              groups:
+                description:
+                  An array of strings. Each string contains the name of a group.
+
+            required:
+              - function
+              - groups
+
+            allOf:
+              - if:
+                  properties:
+                    function:
+                      const: pon
+                then:
+                  properties:
+                    groups:
+                      enum: [pon]
+              - if:
+                  properties:
+                    function:
+                      const: tod_1pps
+                then:
+                  properties:
+                    groups:
+                      enum: [pon_tod_1pps, gsw_tod_1pps]
+              - if:
+                  properties:
+                    function:
+                      const: sipo
+                then:
+                  properties:
+                    groups:
+                      enum: [sipo, sipo_rclk]
+              - if:
+                  properties:
+                    function:
+                      const: mdio
+                then:
+                  properties:
+                    groups:
+                      enum: [mdio]
+              - if:
+                  properties:
+                    function:
+                      const: uart
+                then:
+                  properties:
+                    groups:
+                      items:
+                        enum: [uart2, uart2_cts_rts, hsuart, hsuart_cts_rts, uart4,
+                               uart5]
+                      maxItems: 2
+              - if:
+                  properties:
+                    function:
+                      const: i2c
+                then:
+                  properties:
+                    groups:
+                      enum: [i2c1]
+              - if:
+                  properties:
+                    function:
+                      const: jtag
+                then:
+                  properties:
+                    groups:
+                      enum: [jtag_udi, jtag_dfd]
+              - if:
+                  properties:
+                    function:
+                      const: pcm
+                then:
+                  properties:
+                    groups:
+                      enum: [pcm1, pcm2]
+              - if:
+                  properties:
+                    function:
+                      const: spi
+                then:
+                  properties:
+                    groups:
+                      items:
+                        enum: [spi_quad, spi_cs1]
+                      maxItems: 2
+              - if:
+                  properties:
+                    function:
+                      const: pcm_spi
+                then:
+                  properties:
+                    groups:
+                      items:
+                        enum: [pcm_spi, pcm_spi_int, pcm_spi_rst, pcm_spi_cs1,
+                               pcm_spi_cs2_p156, pcm_spi_cs2_p128, pcm_spi_cs3,
+                               pcm_spi_cs4]
+                      maxItems: 7
+              - if:
+                  properties:
+                    function:
+                      const: i2c
+                then:
+                  properties:
+                    groups:
+                      enum: [i2s]
+              - if:
+                  properties:
+                    function:
+                      const: emmc
+                then:
+                  properties:
+                    groups:
+                      enum: [emmc]
+              - if:
+                  properties:
+                    function:
+                      const: pnand
+                then:
+                  properties:
+                    groups:
+                      enum: [pnand]
+              - if:
+                  properties:
+                    function:
+                      const: pcie_reset
+                then:
+                  properties:
+                    groups:
+                      enum: [pcie_reset0, pcie_reset1, pcie_reset2]
+              - if:
+                  properties:
+                    function:
+                      const: pwm
+                then:
+                  properties:
+                    groups:
+                      enum: [gpio0, gpio1, gpio2, gpio3, gpio4, gpio5, gpio6,
+                             gpio7, gpio8, gpio9, gpio10, gpio11, gpio12, gpio13,
+                             gpio14, gpio15, gpio16, gpio17, gpio18, gpio19,
+                             gpio20, gpio21, gpio22, gpio23, gpio24, gpio25,
+                             gpio26, gpio27, gpio28, gpio29, gpio30, gpio31,
+                             gpio36, gpio37, gpio38, gpio39, gpio40, gpio41,
+                             gpio42, gpio43, gpio44, gpio45, gpio46, gpio47]
+              - if:
+                  properties:
+                    function:
+                      const: phy1_led0
+                then:
+                  properties:
+                    groups:
+                      enum: [gpio33, gpio34, gpio35, gpio42]
+              - if:
+                  properties:
+                    function:
+                      const: phy2_led0
+                then:
+                  properties:
+                    groups:
+                      enum: [gpio33, gpio34, gpio35, gpio42]
+              - if:
+                  properties:
+                    function:
+                      const: phy3_led0
+                then:
+                  properties:
+                    groups:
+                      enum: [gpio33, gpio34, gpio35, gpio42]
+              - if:
+                  properties:
+                    function:
+                      const: phy4_led0
+                then:
+                  properties:
+                    groups:
+                      enum: [gpio33, gpio34, gpio35, gpio42]
+              - if:
+                  properties:
+                    function:
+                      const: phy1_led1
+                then:
+                  properties:
+                    groups:
+                      enum: [gpio43, gpio44, gpio45, gpio46]
+              - if:
+                  properties:
+                    function:
+                      const: phy2_led1
+                then:
+                  properties:
+                    groups:
+                      enum: [gpio43, gpio44, gpio45, gpio46]
+              - if:
+                  properties:
+                    function:
+                      const: phy3_led1
+                then:
+                  properties:
+                    groups:
+                      enum: [gpio43, gpio44, gpio45, gpio46]
+              - if:
+                  properties:
+                    function:
+                      const: phy4_led1
+                then:
+                  properties:
+                    groups:
+                      enum: [gpio43, gpio44, gpio45, gpio46]
+
+            additionalProperties: false
+
+          '^conf(-|$)':
+            type: object
+
+            description:
+              pinconf configuration nodes.
+
+            $ref: /schemas/pinctrl/pincfg-node.yaml
+
+            properties:
+              pins:
+                description:
+                  An array of strings. Each string contains the name of a pin.
+                items:
+                  enum: [uart1_txd, uart1_rxd, i2c_scl, i2c_sda, spi_cs0, spi_clk,
+                         spi_mosi, spi_miso, gpio0, gpio1, gpio2, gpio3, gpio4,
+                         gpio5, gpio6, gpio7, gpio8, gpio9, gpio10, gpio11, gpio12,
+                         gpio13, gpio14, gpio15, gpio16, gpio17, gpio18, gpio19,
+                         gpio20, gpio21, gpio22, gpio23, gpio24, gpio25, gpio26,
+                         gpio27, gpio28, gpio29, gpio30, gpio31, gpio32, gpio33,
+                         gpio34, gpio35, gpio36, gpio37, gpio38, gpio39, gpio40,
+                         gpio41, gpio42, gpio43, gpio44, gpio45, gpio46,
+                         pcie_reset0, pcie_reset1, pcie_reset2]
+                minItems: 1
+                maxItems: 58
+
+              bias-disable: true
+
+              bias-pull-up: true
+
+              bias-pull-down: true
+
+              input-enable: true
+
+              output-enable: true
+
+              output-low: true
+
+              output-high: true
+
+              drive-open-drain: true
+
+              drive-strength:
+                description:
+                  Selects the drive strength for MIO pins, in mA.
+                enum: [2, 4, 6, 8]
+
+            required:
+              - pins
+
+            additionalProperties: false
+
+        additionalProperties: false
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - gpio-controller
+  - "#gpio-cells"
+  - "#pwm-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    mfd@1fbf0200 {
+        compatible = "airoha,en7581-gpio-sysctl";
+        reg = <0x1fbf0200 0xc0>;
+
+        interrupt-parent = <&gic>;
+        interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+
+        gpio-controller;
+        #gpio-cells = <2>;
+
+        interrupt-controller;
+        #interrupt-cells = <2>;
+
+        #pwm-cells = <3>;
+
+        pinctrl {
+            pcie1-rst-pins {
+                conf {
+                    pins = "pcie_reset1";
+                    drive-open-drain = <1>;
+                };
+            };
+
+            pwm-pins {
+                mux {
+                    function = "pwm";
+                    groups = "gpio18";
+                };
+            };
+
+            spi-pins {
+                mux {
+                    function = "spi";
+                    groups = "spi_quad", "spi_cs1";
+                };
+            };
+
+            uart2-pins {
+                mux {
+                    function = "uart";
+                    groups = "uart2", "uart2_cts_rts";
+                };
+            };
+
+            uar5-pins {
+                mux {
+                    function = "uart";
+                    groups = "uart5";
+                };
+            };
+
+            mmc-pins {
+                mux {
+                    function = "emmc";
+                    groups = "emmc";
+                };
+            };
+
+            mdio-pins {
+                mux {
+                    function = "mdio";
+                    groups = "mdio";
+                };
+
+                conf {
+                    pins = "gpio2";
+                    output-enable;
+                };
+            };
+
+            gswp1-led0-pins {
+                mux {
+                    function = "phy1_led0";
+                    groups = "gpio33";
+                };
+            };
+
+            gswp2-led1-pins {
+                mux {
+                    function = "phy2_led1";
+                    groups = "gpio44";
+                };
+            };
+        };
+    };
+
+...

-- 
2.46.0