dt-bindings: pinctrl: Add support for Xilinx Versal platform

Add Xilinx Versal compatible string and corresponding groups, function and
pins properties to support pin controller features on Versal platform.

Signed-off-by: Sai Krishna Potthuri <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

Documentation/devicetree/bindings/pinctrl/xlnx,versal-pinctrl.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/xlnx,versal-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx Versal Pinctrl
+
+maintainers:
+  - Sai Krishna Potthuri <[e-mail]>
+
+description: |
+  Please refer to pinctrl-bindings.txt in this directory for details of the
+  common pinctrl bindings used by client devices, including the meaning of the
+  phrase "pin configuration node".
+
+  Versal's pin configuration nodes act as a container for an arbitrary number of
+  subnodes. Each of these subnodes represents some desired configuration for a
+  pin, a group, or a list of pins or groups. This configuration can include the
+  mux function to select on those pin(s)/group(s), and various pin configuration
+  parameters, such as pull-up, slew rate, etc.
+
+  Each configuration node can consist of multiple nodes describing the pinmux and
+  pinconf options. Those nodes can be pinmux nodes or pinconf nodes.
+
+properties:
+  compatible:
+    const: xlnx,versal-pinctrl
+
+patternProperties:
+  '^(.*-)?(default|gpio-grp)$':
+    type: object
+    patternProperties:
+      '^mux':
+        type: object
+        description:
+          Pinctrl node's client devices use subnodes for pin muxes,
+          which in turn use below standard properties.
+        $ref: pinmux-node.yaml#
+
+        properties:
+          pins:
+            description:
+              List of pins to select (either this or "groups" must be specified)
+            $ref: "#/$defs/pins/properties/pins"
+
+          groups:
+            description:
+              List of groups to select (either this or "pins" must be
+              specified), available groups for this subnode.
+            anyOf:
+              - pattern: '^((LPD|PMC)_)MIO([0-9]|[1-6][0-9]|7[0-7])$'
+              - $ref: "#/$defs/pins/properties/groups"
+
+          function:
+            description:
+              Specify the alternative function to be configured for the
+              given pin groups.
+            enum: [spi0, spi0_ss, spi1, spi1_ss, can0, can1, i2c0, i2c1, i2c_pmc, ttc0_clk,
+                   ttc0_wav, ttc1_clk, ttc1_wav, ttc2_clk, ttc2_wav, ttc3_clk, ttc3_wav, wwdt0,
+                   wwdt1, sysmon_i2c0, sysmon_i2c0_alrt, uart0, uart0_ctrl, uart1, uart1_ctrl,
+                   gpio0, gpio1, gpio2, emio0, gem0, gem1, trace0, trace0_clk, mdio0, mdio1, gem_tsu0,
+                   pcie0, smap0, usb0, sd0, sd0_pc, sd0_cd, sd0_wp, sd1, sd1_pc, sd1_wp, sd1_cd,
+                   ospi0, ospi0_ss, qspi0, qspi0_fbclk, qspi0_ss, test_clk, test_scan, tamper_trigger]
+
+        required:
+          - function
+
+        oneOf:
+          - required: [ groups ]
+          - required: [ pins ]
+
+        additionalProperties: false
+
+      '^conf':
+        type: object
+        description:
+          Pinctrl node's client devices use subnodes for pin configurations,
+          which in turn use the standard properties below.
+        allOf:
+          - $ref: pincfg-node.yaml#
+          - $ref: "#/$defs/pins"
+
+    additionalProperties: false
+
+allOf:
+  - $ref: pinctrl.yaml#
+
+required:
+  - compatible
+
+additionalProperties: false
+
+$defs:
+  pins:
+    properties:
+      groups:
+        description:
+          List of pin groups to select in this subnode.
+        items:
+          enum: [spi0_0_grp, spi0_1_grp, spi0_2_grp, spi0_3_grp, spi0_4_grp, spi0_5_grp,
+                 spi0_ss_0_grp, spi0_ss_1_grp, spi0_ss_2_grp, spi0_ss_3_grp, spi0_ss_4_grp,
+                 spi0_ss_5_grp, spi0_ss_6_grp, spi0_ss_7_grp, spi0_ss_8_grp, spi0_ss_9_grp,
+                 spi0_ss_10_grp, spi0_ss_11_grp, spi0_ss_12_grp, spi0_ss_13_grp, spi0_ss_14_grp,
+                 spi0_ss_15_grp, spi0_ss_16_grp, spi0_ss_17_grp, spi1_0_grp, spi1_1_grp,
+                 spi1_2_grp, spi1_3_grp, spi1_4_grp, spi1_5_grp, spi1_ss_0_grp, spi1_ss_1_grp,
+                 spi1_ss_2_grp, spi1_ss_3_grp, spi1_ss_4_grp, spi1_ss_5_grp, spi1_ss_6_grp,
+                 spi1_ss_7_grp, spi1_ss_8_grp, spi1_ss_9_grp, spi1_ss_10_grp, spi1_ss_11_grp,
+                 spi1_ss_12_grp, spi1_ss_13_grp, spi1_ss_14_grp, spi1_ss_15_grp, spi1_ss_16_grp
+                 spi1_ss_17_grp, can0_0_grp, can0_1_grp, can0_2_grp, can0_3_grp, can0_4_grp,
+                 can0_5_grp, can0_6_grp, can0_7_grp, can0_8_grp, can0_9_grp, can0_10_grp,
+                 can0_11_grp, can0_12_grp, can0_13_grp, can0_14_grp, can0_15_grp, can0_16_grp,
+                 can0_17_grp, can1_0_grp, can1_1_grp, can1_2_grp, can1_3_grp, can1_4_grp,
+                 can1_5_grp, can1_6_grp, can1_7_grp, can1_8_grp, can1_9_grp, can1_10_grp,
+                 can1_11_grp, can1_12_grp, can1_13_grp, can1_14_grp, can1_15_grp, can1_16_grp,
+                 can1_17_grp, can1_18_grp, i2c0_0_grp, i2c0_1_grp, i2c0_2_grp, i2c0_3_grp,
+                 i2c0_4_grp, i2c0_5_grp, i2c0_6_grp, i2c0_7_grp, i2c0_8_grp, i2c0_9_grp,
+                 i2c0_10_grp, i2c0_11_grp, i2c0_12_grp, i2c0_13_grp, i2c0_14_grp, i2c0_15_grp,
+                 i2c0_16_grp, i2c0_17_grp, i2c1_0_grp, i2c1_1_grp, i2c1_2_grp, i2c1_3_grp,
+                 i2c1_4_grp, i2c1_5_grp, i2c1_6_grp, i2c1_7_grp, i2c1_8_grp, i2c1_9_grp,
+                 i2c1_10_grp, i2c1_11_grp, i2c1_12_grp, i2c1_13_grp, i2c1_14_grp, i2c1_15_grp,
+                 i2c1_16_grp, i2c1_17_grp, i2c1_18_grp, i2c_pmc_0_grp, i2c_pmc_1_grp,
+                 i2c_pmc_2_grp, i2c_pmc_3_grp, i2c_pmc_4_grp, i2c_pmc_5_grp, i2c_pmc_6_grp,
+                 i2c_pmc_7_grp, i2c_pmc_8_grp, i2c_pmc_9_grp, i2c_pmc_10_grp, i2c_pmc_11_grp,
+                 i2c_pmc_12_grp, ttc0_clk_0_grp, ttc0_clk_1_grp, ttc0_clk_2_grp, ttc0_clk_3_grp,
+                 ttc0_clk_4_grp, ttc0_clk_5_grp, ttc0_clk_6_grp, ttc0_clk_7_grp, ttc0_clk_8_grp,
+                 ttc0_wav_0_grp, ttc0_wav_1_grp, ttc0_wav_2_grp, ttc0_wav_3_grp, ttc0_wav_4_grp,
+                 ttc0_wav_5_grp, ttc0_wav_6_grp, ttc0_wav_7_grp, ttc0_wav_8_grp, ttc1_clk_0_grp,
+                 ttc1_clk_1_grp, ttc1_clk_2_grp, ttc1_clk_3_grp, ttc1_clk_4_grp, ttc1_clk_5_grp,
+                 ttc1_clk_6_grp, ttc1_clk_7_grp, ttc1_clk_8_grp, ttc1_wav_0_grp, ttc1_wav_1_grp,
+                 ttc1_wav_2_grp, ttc1_wav_3_grp, ttc1_wav_4_grp, ttc1_wav_5_grp, ttc1_wav_6_grp,
+                 ttc1_wav_7_grp, ttc1_wav_8_grp, ttc2_clk_0_grp, ttc2_clk_1_grp, ttc2_clk_2_grp,
+                 ttc2_clk_3_grp, ttc2_clk_4_grp, ttc2_clk_5_grp, ttc2_clk_6_grp, ttc2_clk_7_grp,
+                 ttc2_clk_8_grp, ttc2_wav_0_grp, ttc2_wav_1_grp, ttc2_wav_2_grp, ttc2_wav_3_grp,
+                 ttc2_wav_4_grp, ttc2_wav_5_grp, ttc2_wav_6_grp, ttc2_wav_7_grp, ttc2_wav_8_grp,
+                 ttc3_clk_0_grp, ttc3_clk_1_grp, ttc3_clk_2_grp, ttc3_clk_3_grp, ttc3_clk_4_grp,
+                 ttc3_clk_5_grp, ttc3_clk_6_grp, ttc3_clk_7_grp, ttc3_clk_8_grp, ttc3_wav_0_grp,
+                 ttc3_wav_1_grp, ttc3_wav_2_grp, ttc3_wav_3_grp, ttc3_wav_4_grp, ttc3_wav_5_grp,
+                 ttc3_wav_6_grp, ttc3_wav_7_grp, ttc3_wav_8_grp, wwdt0_0_grp, wwdt0_1_grp,
+                 wwdt0_2_grp, wwdt0_3_grp, wwdt0_4_grp, wwdt0_5_grp, wwdt1_0_grp, wwdt1_1_grp,
+                 wwdt1_2_grp, wwdt1_3_grp, wwdt1_4_grp, wwdt1_5_grp, sysmon_i2c0_0_grp,
+                 sysmon_i2c0_1_grp, sysmon_i2c0_2_grp, sysmon_i2c0_3_grp, sysmon_i2c0_4_grp,
+                 sysmon_i2c0_5_grp, sysmon_i2c0_6_grp, sysmon_i2c0_7_grp, sysmon_i2c0_8_grp,
+                 sysmon_i2c0_9_grp, sysmon_i2c0_10_grp, sysmon_i2c0_11_grp, sysmon_i2c0_12_grp,
+                 sysmon_i2c0_13_grp, sysmon_i2c0_14_grp, sysmon_i2c0_15_grp,
+                 sysmon_i2c0_16_grp, sysmon_i2c0_17_grp, sysmon_i2c0_alrt_0_grp,
+                 sysmon_i2c0_alrt_1_grp, sysmon_i2c0_alrt_2_grp, sysmon_i2c0_alrt_3_grp,
+                 sysmon_i2c0_alrt_4_grp, sysmon_i2c0_alrt_5_grp, sysmon_i2c0_alrt_6_grp,
+                 sysmon_i2c0_alrt_7_grp, sysmon_i2c0_alrt_8_grp, sysmon_i2c0_alrt_9_grp,
+                 sysmon_i2c0_alrt_10_grp, sysmon_i2c0_alrt_11_grp, sysmon_i2c0_alrt_12_grp,
+                 sysmon_i2c0_alrt_13_grp, sysmon_i2c0_alrt_14_grp, sysmon_i2c0_alrt_15_grp,
+                 sysmon_i2c0_alrt_16_grp, sysmon_i2c0_alrt_17_grp, uart0_0_grp, uart0_1_grp,
+                 uart0_2_grp, uart0_3_grp, uart0_4_grp, uart0_5_grp, uart0_6_grp, uart0_7_grp,
+                 uart0_8_grp, uart0_ctrl_0_grp, uart0_ctrl_1_grp, uart0_ctrl_2_grp,
+                 uart0_ctrl_3_grp, uart0_ctrl_4_grp, uart0_ctrl_5_grp, uart0_ctrl_6_grp,
+                 uart0_ctrl_7_grp, uart0_ctrl_8_grp, uart1_0_grp, uart1_1_grp, uart1_2_grp,
+                 uart1_3_grp, uart1_4_grp, uart1_5_grp, uart1_6_grp, uart1_7_grp, uart1_8_grp,
+                 uart1_ctrl_0_grp, uart1_ctrl_1_grp, uart1_ctrl_2_grp, uart1_ctrl_3_grp,
+                 uart1_ctrl_4_grp, uart1_ctrl_5_grp, uart1_ctrl_6_grp, uart1_ctrl_7_grp,
+                 uart1_ctrl_8_grp, gpio0_0_grp, gpio0_1_grp, gpio0_2_grp, gpio0_3_grp,
+                 gpio0_4_grp, gpio0_5_grp, gpio0_6_grp, gpio0_7_grp, gpio0_8_grp, gpio0_9_grp,
+                 gpio0_10_grp, gpio0_11_grp, gpio0_12_grp, gpio0_13_grp, gpio0_14_grp,
+                 gpio0_15_grp, gpio0_16_grp, gpio0_17_grp, gpio0_18_grp, gpio0_19_grp,
+                 gpio0_20_grp, gpio0_21_grp, gpio0_22_grp, gpio0_23_grp, gpio0_24_grp,
+                 gpio0_25_grp, gpio1_0_grp, gpio1_1_grp, gpio1_2_grp, gpio1_3_grp, gpio1_4_grp,
+                 gpio1_5_grp, gpio1_6_grp, gpio1_7_grp, gpio1_8_grp, gpio1_9_grp,
+                 gpio1_10_grp, gpio1_11_grp, gpio1_12_grp, gpio1_13_grp, gpio1_14_grp,
+                 gpio1_15_grp, gpio1_16_grp, gpio1_17_grp, gpio1_18_grp, gpio1_19_grp,
+                 gpio1_20_grp, gpio1_21_grp, gpio1_22_grp, gpio1_23_grp, gpio1_24_grp,
+                 gpio1_25_grp, gpio2_0_grp, gpio2_1_grp, gpio2_2_grp, gpio2_3_grp, gpio2_4_grp,
+                 gpio2_5_grp, gpio2_6_grp, gpio2_7_grp, gpio2_8_grp, gpio2_9_grp, gpio2_10_grp,
+                 gpio2_11_grp, gpio2_12_grp, gpio2_13_grp, gpio2_14_grp, gpio2_15_grp,
+                 gpio2_16_grp, gpio2_17_grp, gpio2_18_grp, gpio2_19_grp, gpio2_20_grp,
+                 gpio2_21_grp, gpio2_22_grp, gpio2_23_grp, gpio2_24_grp, gpio2_25_grp,
+                 emio0_0_grp, emio0_1_grp, emio0_2_grp, emio0_3_grp, emio0_4_grp, emio0_5_grp,
+                 emio0_6_grp, emio0_7_grp, emio0_8_grp, emio0_9_grp, emio0_10_grp,
+                 emio0_11_grp, emio0_12_grp, emio0_13_grp, emio0_14_grp, emio0_15_grp,
+                 emio0_16_grp, emio0_17_grp, emio0_18_grp, emio0_19_grp, emio0_20_grp,
+                 emio0_21_grp, emio0_22_grp, emio0_23_grp, emio0_24_grp, emio0_25_grp,
+                 emio0_26_grp, emio0_27_grp, emio0_28_grp, emio0_29_grp, emio0_30_grp,
+                 emio0_31_grp, emio0_32_grp, emio0_33_grp, emio0_34_grp, emio0_35_grp,
+                 emio0_36_grp, emio0_37_grp, emio0_38_grp, emio0_39_grp, emio0_40_grp,
+                 emio0_41_grp, emio0_42_grp, emio0_43_grp, emio0_44_grp, emio0_45_grp,
+                 emio0_46_grp, emio0_47_grp, emio0_48_grp, emio0_49_grp, emio0_50_grp,
+                 emio0_51_grp, emio0_52_grp, emio0_53_grp, emio0_54_grp, emio0_55_grp,
+                 emio0_56_grp, emio0_57_grp, emio0_58_grp, emio0_59_grp, emio0_60_grp,
+                 emio0_61_grp, emio0_62_grp, emio0_63_grp, emio0_64_grp, emio0_65_grp,
+                 emio0_66_grp, emio0_67_grp, emio0_68_grp, emio0_69_grp, emio0_70_grp,
+                 emio0_71_grp, emio0_72_grp, emio0_73_grp, emio0_74_grp, emio0_75_grp,
+                 emio0_76_grp, emio0_77_grp, gem0_0_grp, gem0_1_grp, gem1_0_grp, gem1_1_grp,
+                 trace0_0_grp, trace0_1_grp, trace0_2_grp, trace0_clk_0_grp, trace0_clk_1_grp,
+                 trace0_clk_2_grp, mdio0_0_grp, mdio0_1_grp, mdio1_0_grp, mdio1_1_grp,
+                 gem_tsu0_0_grp, gem_tsu0_1_grp, gem_tsu0_2_grp, gem_tsu0_3_grp, pcie0_0_grp,
+                 pcie0_1_grp, pcie0_2_grp, smap0_0_grp, usb0_0_grp, sd0_0_grp, sd0_1_grp,
+                 sd0_2_grp, sd0_3_grp, sd0_4_grp, sd0_5_grp, sd0_6_grp, sd0_7_grp, sd0_8_grp,
+                 sd0_9_grp, sd0_10_grp, sd0_11_grp, sd0_12_grp, sd0_13_grp, sd0_14_grp,
+                 sd0_15_grp, sd0_16_grp, sd0_17_grp, sd0_18_grp, sd0_19_grp, sd0_20_grp,
+                 sd0_21_grp, sd0_pc_0_grp, sd0_pc_1_grp, sd0_cd_0_grp, sd0_cd_1_grp,
+                 sd0_wp_0_grp, sd0_wp_1_grp, sd1_0_grp, sd1_1_grp, sd1_2_grp, sd1_3_grp,
+                 sd1_4_grp, sd1_5_grp, sd1_6_grp, sd1_7_grp, sd1_8_grp, sd1_9_grp, sd1_10_grp,
+                 sd1_11_grp, sd1_12_grp, sd1_13_grp, sd1_14_grp, sd1_15_grp, sd1_16_grp,
+                 sd1_17_grp, sd1_18_grp, sd1_19_grp, sd1_20_grp, sd1_21_grp, sd1_pc_0_grp,
+                 sd1_pc_1_grp, sd1_cd_0_grp, sd1_cd_1_grp, sd1_wp_0_grp, sd1_wp_1_grp,
+                 ospi0_0_grp, ospi0_ss_0_grp, qspi0_0_grp, qspi0_fbclk_0_grp, qspi0_ss_0_grp,
+                 test_clk_0_grp, test_scan_0_grp, tamper_trigger_0_grp]
+        minItems: 1
+        maxItems: 78
+
+      pins:
+        description:
+          List of pin names to select in this subnode.
+        items:
+          pattern: '^((LPD|PMC)_)MIO([0-9]|[1-6][0-9]|7[0-7])$'
+        minItems: 1
+        maxItems: 78
+
+      bias-pull-up: true
+      bias-pull-down: true
+      bias-disable: true
+      input-schmitt-enable: true
+      input-schmitt-disable: true
+      bias-high-impedance: true
+      low-power-enable: true
+      low-power-disable: true
+
+      slew-rate:
+        enum: [0, 1]
+
+      output-enable:
+        description:
+          This will internally disable the tri-state for MIO pins.
+
+      drive-strength:
+        description:
+          Selects the drive strength for MIO pins, in mA.
+        enum: [2, 4, 8, 12]
+
+      power-source:
+        enum: [0, 1]
+
+    oneOf:
+      - required: [ groups ]
+      - required: [ pins ]
+
+    additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/pinctrl/pinctrl-zynqmp.h>
+    pinctrl {
+      compatible = "xlnx,versal-pinctrl";
+
+      uart0-default {
+        mux {
+          groups = "uart0_4_grp", "uart0_5_grp";
+          function = "uart0";
+        };
+
+        conf {
+          groups = "uart0_4_grp";
+          slew-rate = <SLEW_RATE_SLOW>;
+          power-source = <IO_STANDARD_LVCMOS18>;
+        };
+
+        conf-rx {
+          pins = "PMC_MIO42";
+          bias-pull-up;
+        };
+
+        conf-tx {
+          pins = "PMC_MIO43";
+          bias-disable;
+          input-schmitt-disable;
+        };
+      };
+    };
+
+...