dt-bindings: pinctrl: mt7620: add proper function muxing binding

Not every function can be muxed to a group. Add proper binding which
documents which function can be muxed to a group or set of groups.
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20221231160849.40544-3-arinc.unal@arinc9.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/ralink,mt7620-pinctrl.yaml

@@ -29,47 +29,609 @@ patternProperties:
         $ref: pinmux-node.yaml#
 
         properties:
-          groups:
-            description: The pin group to select.
-            enum: [
-              # common
-              i2c, spi, wdt,
-
-              # For MT7620 SoC
-              ephy, mdio, nd_sd, pa, pcie, rgmii1, rgmii2, spi refclk,
-              uartf, uartlite, wled,
-
-              # For MT7628 and MT7688 SoCs
-              gpio, i2s, p0led_an, p0led_kn, p1led_an, p1led_kn, p2led_an,
-              p2led_kn, p3led_an, p3led_kn, p4led_an, p4led_kn, perst, pwm0,
-              pwm1, refclk, sdmode, spi cs1, spis, uart0, uart1, uart2,
-              wled_an, wled_kn,
-            ]
-
           function:
-            description: The mux function to select.
-            enum: [
-              # common
-              gpio, i2c, refclk, spi,
-
-              # For MT7620 SoC
-              ephy, gpio i2s, gpio uartf, i2s uartf, mdio, nand, pa,
-              pcie refclk, pcie rst, pcm gpio, pcm i2s, pcm uartf,
-              rgmii1, rgmii2, sd, spi refclk, uartf, uartlite, wdt refclk,
-              wdt rst, wled,
+            description:
+              A string containing the name of the function to mux to the group.
+            anyOf:
+              - description: For MT7620 SoC
+                enum: [ephy, gpio, gpio i2s, gpio uartf, i2c, i2s uartf, mdio, nand, pa,
+                       pcie refclk, pcie rst, pcm gpio, pcm i2s, pcm uartf, refclk,
+                       rgmii1, rgmii2, sd, spi, spi refclk, uartf, uartlite, wdt refclk,
+                       wdt rst, wled]
 
-              # For MT7628 and MT7688 SoCs
-              antenna, debug, i2s, jtag, p0led_an, p0led_kn,
+              - description: For MT7628 and MT7688 SoCs
+                enum: [antenna, debug, gpio, i2c, i2s, jtag, p0led_an, p0led_kn,
                        p1led_an, p1led_kn, p2led_an, p2led_kn, p3led_an, p3led_kn,
                        p4led_an, p4led_kn, pcie, pcm, perst, pwm, pwm0, pwm1, pwm_uart2,
-              rsvd, sdxc, sdxc d5 d4, sdxc d6, sdxc d7, spi cs1,
-              spis, sw_r, uart0, uart1, uart2, utif, wdt, wled_an, wled_kn, -,
-            ]
+                       refclk, rsvd, sdxc, sdxc d5 d4, sdxc d6, sdxc d7, spi, spi cs1,
+                       spis, sw_r, uart0, uart1, uart2, utif, wdt, wled_an, wled_kn, -]
+
+          groups:
+            description:
+              An array of strings. Each string contains the name of a group.
+            maxItems: 1
 
         required:
           - groups
           - function
 
+        allOf:
+          - if:
+              properties:
+                function:
+                  const: antenna
+            then:
+              properties:
+                groups:
+                  enum: [i2s]
+
+          - if:
+              properties:
+                function:
+                  const: debug
+            then:
+              properties:
+                groups:
+                  enum: [i2c]
+
+          - if:
+              properties:
+                function:
+                  const: ephy
+            then:
+              properties:
+                groups:
+                  enum: [ephy]
+
+          - if:
+              properties:
+                function:
+                  const: gpio
+            then:
+              properties:
+                groups:
+                  anyOf:
+                    - description: For MT7620 SoC
+                      enum: [ephy, i2c, mdio, nd_sd, pa, pcie, rgmii1, rgmii2,
+                             spi, spi refclk, uartf, uartlite, wdt, wled]
+
+                    - description: For MT7628 and MT7688 SoCs
+                      enum: [gpio, i2c, i2s, p0led_an, p0led_kn, p1led_an,
+                             p1led_kn, p2led_an, p2led_kn, p3led_an, p3led_kn,
+                             p4led_an, p4led_kn, perst, pwm0, pwm1, refclk,
+                             sdmode, spi, spi cs1, spis, uart0, uart1, uart2,
+                             wdt, wled_an, wled_kn]
+
+          - if:
+              properties:
+                function:
+                  const: gpio i2s
+            then:
+              properties:
+                groups:
+                  enum: [uartf]
+
+          - if:
+              properties:
+                function:
+                  const: gpio uartf
+            then:
+              properties:
+                groups:
+                  enum: [uartf]
+
+          - if:
+              properties:
+                function:
+                  const: i2c
+            then:
+              properties:
+                groups:
+                  enum: [i2c]
+
+          - if:
+              properties:
+                function:
+                  const: i2s
+            then:
+              properties:
+                groups:
+                  enum: [i2s]
+
+          - if:
+              properties:
+                function:
+                  const: i2s uartf
+            then:
+              properties:
+                groups:
+                  enum: [uartf]
+
+          - if:
+              properties:
+                function:
+                  const: jtag
+            then:
+              properties:
+                groups:
+                  enum: [p0led_an, p0led_kn, p1led_an, p1led_kn, p2led_an,
+                         p2led_kn, p3led_an, p3led_kn, p4led_an, p4led_kn,
+                         sdmode]
+
+          - if:
+              properties:
+                function:
+                  const: mdio
+            then:
+              properties:
+                groups:
+                  enum: [mdio]
+
+          - if:
+              properties:
+                function:
+                  const: nand
+            then:
+              properties:
+                groups:
+                  enum: [nd_sd]
+
+          - if:
+              properties:
+                function:
+                  const: p0led_an
+            then:
+              properties:
+                groups:
+                  enum: [p0led_an]
+
+          - if:
+              properties:
+                function:
+                  const: p0led_kn
+            then:
+              properties:
+                groups:
+                  enum: [p0led_kn]
+
+          - if:
+              properties:
+                function:
+                  const: p1led_an
+            then:
+              properties:
+                groups:
+                  enum: [p1led_an]
+
+          - if:
+              properties:
+                function:
+                  const: p1led_kn
+            then:
+              properties:
+                groups:
+                  enum: [p1led_kn]
+
+          - if:
+              properties:
+                function:
+                  const: p2led_an
+            then:
+              properties:
+                groups:
+                  enum: [p2led_an]
+
+          - if:
+              properties:
+                function:
+                  const: p2led_kn
+            then:
+              properties:
+                groups:
+                  enum: [p2led_kn]
+
+          - if:
+              properties:
+                function:
+                  const: p3led_an
+            then:
+              properties:
+                groups:
+                  enum: [p3led_an]
+
+          - if:
+              properties:
+                function:
+                  const: p3led_kn
+            then:
+              properties:
+                groups:
+                  enum: [p3led_kn]
+
+          - if:
+              properties:
+                function:
+                  const: p4led_an
+            then:
+              properties:
+                groups:
+                  enum: [p4led_an]
+
+          - if:
+              properties:
+                function:
+                  const: p4led_kn
+            then:
+              properties:
+                groups:
+                  enum: [p4led_kn]
+
+          - if:
+              properties:
+                function:
+                  const: pa
+            then:
+              properties:
+                groups:
+                  enum: [pa]
+
+          - if:
+              properties:
+                function:
+                  const: pcie
+            then:
+              properties:
+                groups:
+                  enum: [gpio]
+
+          - if:
+              properties:
+                function:
+                  const: pcie refclk
+            then:
+              properties:
+                groups:
+                  enum: [pcie]
+
+          - if:
+              properties:
+                function:
+                  const: pcie rst
+            then:
+              properties:
+                groups:
+                  enum: [pcie]
+
+          - if:
+              properties:
+                function:
+                  const: pcm
+            then:
+              properties:
+                groups:
+                  enum: [i2s]
+
+          - if:
+              properties:
+                function:
+                  const: pcm gpio
+            then:
+              properties:
+                groups:
+                  enum: [uartf]
+
+          - if:
+              properties:
+                function:
+                  const: pcm i2s
+            then:
+              properties:
+                groups:
+                  enum: [uartf]
+
+          - if:
+              properties:
+                function:
+                  const: pcm uartf
+            then:
+              properties:
+                groups:
+                  enum: [uartf]
+
+          - if:
+              properties:
+                function:
+                  const: perst
+            then:
+              properties:
+                groups:
+                  enum: [perst]
+
+          - if:
+              properties:
+                function:
+                  const: pwm
+            then:
+              properties:
+                groups:
+                  enum: [uart1, uart2]
+
+          - if:
+              properties:
+                function:
+                  const: pwm0
+            then:
+              properties:
+                groups:
+                  enum: [pwm0]
+
+          - if:
+              properties:
+                function:
+                  const: pwm1
+            then:
+              properties:
+                groups:
+                  enum: [pwm1]
+
+          - if:
+              properties:
+                function:
+                  const: pwm_uart2
+            then:
+              properties:
+                groups:
+                  enum: [spis]
+
+          - if:
+              properties:
+                function:
+                  const: refclk
+            then:
+              properties:
+                groups:
+                  anyOf:
+                    - description: For MT7620 SoC
+                      enum: [mdio]
+
+                    - description: For MT7628 and MT7688 SoCs
+                      enum: [gpio, refclk, spi cs1]
+
+          - if:
+              properties:
+                function:
+                  const: rgmii1
+            then:
+              properties:
+                groups:
+                  enum: [rgmii1]
+
+          - if:
+              properties:
+                function:
+                  const: rgmii2
+            then:
+              properties:
+                groups:
+                  enum: [rgmii2]
+
+          - if:
+              properties:
+                function:
+                  const: rsvd
+            then:
+              properties:
+                groups:
+                  enum: [p0led_an, p0led_kn, wled_an, wled_kn]
+
+          - if:
+              properties:
+                function:
+                  const: sd
+            then:
+              properties:
+                groups:
+                  enum: [nd_sd]
+
+          - if:
+              properties:
+                function:
+                  const: sdxc
+            then:
+              properties:
+                groups:
+                  enum: [sdmode]
+
+          - if:
+              properties:
+                function:
+                  const: sdxc d5 d4
+            then:
+              properties:
+                groups:
+                  enum: [uart2]
+
+          - if:
+              properties:
+                function:
+                  const: sdxc d6
+            then:
+              properties:
+                groups:
+                  enum: [pwm1]
+
+          - if:
+              properties:
+                function:
+                  const: sdxc d7
+            then:
+              properties:
+                groups:
+                  enum: [pwm0]
+
+          - if:
+              properties:
+                function:
+                  const: spi
+            then:
+              properties:
+                groups:
+                  enum: [spi]
+
+          - if:
+              properties:
+                function:
+                  const: spi cs1
+            then:
+              properties:
+                groups:
+                  enum: [spi cs1]
+
+          - if:
+              properties:
+                function:
+                  const: spi refclk
+            then:
+              properties:
+                groups:
+                  enum: [spi refclk]
+
+          - if:
+              properties:
+                function:
+                  const: spis
+            then:
+              properties:
+                groups:
+                  enum: [spis]
+
+          - if:
+              properties:
+                function:
+                  const: sw_r
+            then:
+              properties:
+                groups:
+                  enum: [uart1]
+
+          - if:
+              properties:
+                function:
+                  const: uart0
+            then:
+              properties:
+                groups:
+                  enum: [uart0]
+
+          - if:
+              properties:
+                function:
+                  const: uart1
+            then:
+              properties:
+                groups:
+                  enum: [uart1]
+
+          - if:
+              properties:
+                function:
+                  const: uart2
+            then:
+              properties:
+                groups:
+                  enum: [uart2]
+
+          - if:
+              properties:
+                function:
+                  const: uartf
+            then:
+              properties:
+                groups:
+                  enum: [uartf]
+
+          - if:
+              properties:
+                function:
+                  const: uartlite
+            then:
+              properties:
+                groups:
+                  enum: [uartlite]
+
+          - if:
+              properties:
+                function:
+                  const: utif
+            then:
+              properties:
+                groups:
+                  enum: [p1led_an, p1led_kn, p2led_an, p2led_kn, p3led_an,
+                         p3led_kn, p4led_an, p4led_kn, pwm0, pwm1, sdmode, spis]
+
+          - if:
+              properties:
+                function:
+                  const: wdt
+            then:
+              properties:
+                groups:
+                  enum: [wdt]
+
+          - if:
+              properties:
+                function:
+                  const: wdt refclk
+            then:
+              properties:
+                groups:
+                  enum: [wdt]
+
+          - if:
+              properties:
+                function:
+                  const: wdt rst
+            then:
+              properties:
+                groups:
+                  enum: [wdt]
+
+          - if:
+              properties:
+                function:
+                  const: wled
+            then:
+              properties:
+                groups:
+                  enum: [wled]
+
+          - if:
+              properties:
+                function:
+                  const: wled_an
+            then:
+              properties:
+                groups:
+                  enum: [wled_an]
+
+          - if:
+              properties:
+                function:
+                  const: wled_kn
+            then:
+              properties:
+                groups:
+                  enum: [wled_kn]
+
+          - if:
+              properties:
+                function:
+                  const: "-"
+            then:
+              properties:
+                groups:
+                  enum: [i2c, spi cs1, uart0]
+
         additionalProperties: false
 
     additionalProperties: false
@@ -83,7 +645,6 @@ required:
 additionalProperties: false
 
 examples:
-  # Pinmux controller node
   - |
     pinctrl {
       compatible = "ralink,mt7620-pinctrl";