dt-bindings: pinctrl: Add support for Broadcom STB pin controller

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause

%YAML 1.2

---

$id: http://devicetree.org/schemas/pinctrl/brcm,bcm2712c0-pinctrl.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Broadcom STB family pin controller

maintainers:

  - Ivan T. Ivanov <iivanov@suse.de>

  - A. della Porta <andrea.porta@suse.com>

description: >

  Broadcom's STB family of memory-mapped pin controllers.

  This includes the pin controllers inside the BCM2712 SoC which

  are instances of the STB family and has two silicon variants,

  C0 and D0, which differs slightly in terms of registers layout.

  The -aon- (Always On) variant is the same IP block but differs

  in the number of pins that are associated and the pinmux functions

  for each of those pins.

allOf:

  - $ref: pinctrl.yaml#

properties:

  compatible:

    enum:

      - brcm,bcm2712c0-pinctrl

      - brcm,bcm2712c0-aon-pinctrl

      - brcm,bcm2712d0-pinctrl

      - brcm,bcm2712d0-aon-pinctrl

  reg:

    maxItems: 1

patternProperties:

  '-state$':

    oneOf:

      - $ref: '#/$defs/brcmstb-pinctrl-state'

      - patternProperties:

          '-pins$':

            $ref: '#/$defs/brcmstb-pinctrl-state'

        additionalProperties: false

$defs:

  brcmstb-pinctrl-state:

    allOf:

      - $ref: pincfg-node.yaml#

      - $ref: pinmux-node.yaml#

    description: >

      Pin controller client devices use pin configuration subnodes (children

      and grandchildren) for desired pin configuration.

      Client device subnodes use below standard properties.

    properties:

      pins:

        description:

          List of gpio pins affected by the properties specified in this

          subnode (either this or "groups" must be specified).

        items:

          pattern: '^((aon_)?s?gpio[0-6]?[0-9])|(emmc_(clk|cmd|dat[0-7]|ds))$'

      function:

        description:

          Specify the alternative function to be configured for the specified

          pins.

        enum: [ gpio, alt1, alt2, alt3, alt4, alt5, alt6, alt7, alt8,

                aon_cpu_standbyb, aon_fp_4sec_resetb, aon_gpclk, aon_pwm,

                arm_jtag, aud_fs_clk0, avs_pmu_bsc, bsc_m0, bsc_m1, bsc_m2,

                bsc_m3, clk_observe, ctl_hdmi_5v, enet0, enet0_mii, enet0_rgmii,

                ext_sc_clk, fl0, fl1, gpclk0, gpclk1, gpclk2, hdmi_tx0_auto_i2c,

                hdmi_tx0_bsc, hdmi_tx1_auto_i2c, hdmi_tx1_bsc, i2s_in, i2s_out,

                ir_in, mtsif, mtsif_alt, mtsif_alt1, pdm, pkt, pm_led_out, sc0,

                sd0, sd2, sd_card_a, sd_card_b, sd_card_c, sd_card_d, sd_card_e,

                sd_card_f, sd_card_g, spdif_out, spi_m, spi_s, sr_edm_sense, te0,

                te1, tsio, uart0, uart1, uart2, usb_pwr, usb_vbus, uui, vc_i2c0,

                vc_i2c3, vc_i2c4, vc_i2c5, vc_i2csl, vc_pcm, vc_pwm0, vc_pwm1,

                vc_spi0, vc_spi3, vc_spi4, vc_spi5, vc_uart0, vc_uart2, vc_uart3,

                vc_uart4 ]

      bias-disable: true

      bias-pull-down: true

      bias-pull-up: true

    required:

      - pins

    if:

      properties:

        pins:

          not:

            contains:

              pattern: "^emmc_(clk|cmd|dat[0-7]|ds)$"

    then:

      required:

        - function

    else:

      properties:

        function: false

    additionalProperties: false

required:

  - compatible

  - reg

unevaluatedProperties: false

examples:

  - |

    pinctrl@7d504100 {

        compatible = "brcm,bcm2712c0-pinctrl";

        reg = <0x7d504100 0x30>;

        bt-shutdown-default-state {

            function = "gpio";

            pins = "gpio29";

        };

        uarta-default-state {

            rts-tx-pins {

                function = "uart0";

                pins = "gpio24", "gpio26";

                bias-disable;

            };

            cts-rx-pins {

                function = "uart0";

                pins = "gpio25", "gpio27";

                bias-pull-up;

            };

        };

    };