From 07333899650a5d4c785d3257ee4cd278006b1070 Mon Sep 17 00:00:00 2001 From: "Ivan T. Ivanov" Date: Thu, 28 Aug 2025 14:47:38 +0200 Subject: [PATCH] dt-bindings: pinctrl: Add support for Broadcom STB pin controller The STB pin controller represents a family whose silicon instances are found e.g. on BCM2712 SoC. In particular, on RaspberryPi 5, there are two separate instantiations of the same IP block which differ in the number of pins that are associated and the pinmux functions for each of those pins. The -aon- variant stands for 'Always On'. Depending on the revision of the BCM2712 (CO or D0), the pin controller instance has slight differences in the register layout. Signed-off-by: Ivan T. Ivanov Signed-off-by: Andrea della Porta Reviewed-by: Rob Herring (Arm) [linusw: Dropped extranous label and fixed whitespace] Signed-off-by: Linus Walleij --- .../pinctrl/brcm,bcm2712c0-pinctrl.yaml | 137 ++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,bcm2712c0-pinctrl.yaml diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,bcm2712c0-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/brcm,bcm2712c0-pinctrl.yaml new file mode 100644 index 0000000000000..ae6c13a746b9c --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/brcm,bcm2712c0-pinctrl.yaml @@ -0,0 +1,137 @@ +# 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 + - A. della Porta + +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; + }; + }; + }; -- 2.47.3