From patchwork Tue Nov 16 15:01:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Emil Renner Berthing X-Patchwork-Id: 12622591 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7EFF6C4167D for ; Tue, 16 Nov 2021 15:05:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 44CA763236 for ; Tue, 16 Nov 2021 15:05:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238008AbhKPPIL (ORCPT ); Tue, 16 Nov 2021 10:08:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47978 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236194AbhKPPHR (ORCPT ); Tue, 16 Nov 2021 10:07:17 -0500 Received: from mail-ed1-x536.google.com (mail-ed1-x536.google.com [IPv6:2a00:1450:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A6A0C061226; Tue, 16 Nov 2021 07:02:15 -0800 (PST) Received: by mail-ed1-x536.google.com with SMTP id r11so25347485edd.9; Tue, 16 Nov 2021 07:02:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=GS0NC5qfhI1GA5dEA0GnRmIq9rDYumLgycMlqKtyi0g=; b=qBAaVA5vKIyf8xZhHWOFsazp6CurzEmOklwIIoebtF0Adpro2x7K6W9QMflekpufrV tSEUJAWqEInb+8SjgQID1y57v7SVcKpi0QiYh+vuHqquHt/SMAz5zTvasdipNLGeq5Lj r9CI2uGRAewt/rwn15ck0kkudBsumXIaMEnJHjTBsZ4TFm9CkY/JYRsNndbuBVkqoSYU BZP8WOfFj47vUhO+3mQSfqzWEqfX+PeHE8z6Y0K0PUq28VALXmpx8oN316XmT8HlvFF9 /yBL0GzSuXKtn+4elnPjKsHUgvShH8kBKglyJEWfol7Tfitt4C74R+/3CYcITOqqB2JM FMJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=GS0NC5qfhI1GA5dEA0GnRmIq9rDYumLgycMlqKtyi0g=; b=3E60DTddRs071Js1KNG9A3Ythr15TvgfT2KsIHouiz7bok9tA2DFU4ZMDdFpIIToo9 QaGGciTc3+boarYcHKk4YlW4cp2lnuLWdje98bpSxbgCzrcEizOeb0eRAYkCtaXyChbY MbpM0LjE2gKGavNABzBx8l7pB1j4MN646o9sN8HeRseyyJT+3bwQSVr07QMYvHUX31l/ iZWT8sR4mLUwt68V6vn1JdoAz93UCnYMLZpZUGhpB3tsHG93uLewaUQwpE675FGzz97k 2usHR7gAziOfiaQb6dMV9McxTc4aDk7ASFxJzP1Ep+iVH5PNWuSz8QsjMnbps784I/KX 1tBg== X-Gm-Message-State: AOAM530pfHWPQpTn2nURjqfXHgHggCFVYDRNb3CtojGAlu/qOYS227e7 akpeHYGmO6JnrHtv5pxe6nQ= X-Google-Smtp-Source: ABdhPJx5UEZJ3VGh5umNRV73vjeRS9phAagHqL4kK93yLs6wGMtag6F0Y7yhdesaNpKYeuPJy1++ng== X-Received: by 2002:a05:6402:1a27:: with SMTP id be7mr10525778edb.187.1637074931513; Tue, 16 Nov 2021 07:02:11 -0800 (PST) Received: from stitch.. ([2a02:aa7:4600:b4ae:a375:e7a0:9eaf:8d7b]) by smtp.gmail.com with ESMTPSA id u16sm9414311edr.43.2021.11.16.07.02.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Nov 2021 07:02:11 -0800 (PST) Sender: Emil Renner Berthing From: Emil Renner Berthing To: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org, linux-serial@vger.kernel.org Cc: Emil Renner Berthing , Palmer Dabbelt , Paul Walmsley , Rob Herring , Michael Turquette , Stephen Boyd , Thomas Gleixner , Marc Zyngier , Philipp Zabel , Linus Walleij , Greg Kroah-Hartman , Daniel Lezcano , Andy Shevchenko , Jiri Slaby , Maximilian Luz , Sagar Kadam , Drew Fustini , Geert Uytterhoeven , Michael Zhu , Fu Wei , Anup Patel , Atish Patra , Matteo Croce , Arnd Bergmann , linux-kernel@vger.kernel.org, Rob Herring Subject: [PATCH v4 11/16] dt-bindings: pinctrl: Add StarFive JH7100 bindings Date: Tue, 16 Nov 2021 16:01:14 +0100 Message-Id: <20211116150119.2171-12-kernel@esmil.dk> X-Mailer: git-send-email 2.34.0 In-Reply-To: <20211116150119.2171-1-kernel@esmil.dk> References: <20211116150119.2171-1-kernel@esmil.dk> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Add bindings for the GPIO/pin controller on the JH7100 RISC-V SoC by StarFive Ltd. This is a test chip for their upcoming JH7110 SoC. Signed-off-by: Emil Renner Berthing Reviewed-by: Linus Walleij Reviewed-by: Rob Herring --- .../pinctrl/starfive,jh7100-pinctrl.yaml | 307 ++++++++++++++++++ 1 file changed, 307 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml diff --git a/Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml new file mode 100644 index 000000000000..92963604422f --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml @@ -0,0 +1,307 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pinctrl/starfive,jh7100-pinctrl.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: StarFive JH7100 Pin Controller Device Tree Bindings + +description: | + Bindings for the JH7100 RISC-V SoC from StarFive Ltd. + + Out of the SoC's many pins only the ones named PAD_GPIO[0] to PAD_GPIO[63] + and PAD_FUNC_SHARE[0] to PAD_FUNC_SHARE[141] can be multiplexed and have + configurable bias, drive strength, schmitt trigger etc. The SoC has an + interesting 2-layered approach to pin muxing best illustrated by the diagram + below. + + Signal group 0, 1, ... or 6 + ___|___ + | | + LCD output -----------------| | + CMOS Camera interface ------| |--- PAD_GPIO[0] + Ethernet PHY interface -----| MUX |--- PAD_GPIO[1] + ... | | ... + | |--- PAD_GPIO[63] + -------- GPIO0 ------------| | + | -------|-- GPIO1 --------| |--- PAD_FUNC_SHARE[0] + | | | | | |--- PAD_FUNC_SHARE[1] + | | | | ... | | ... + | | | | | |--- PAD_FUNC_SHARE[141] + | | -----|---|-- GPIO63 ---| | + | | | | | | ------- + UART0 UART1 -- + + + The big MUX in the diagram only has 7 different ways of mapping peripherals + on the left to pins on the right. StarFive calls the 7 configurations "signal + groups". + However some peripherals have their I/O go through the 64 "GPIOs". The + diagram only shows UART0 and UART1, but this also includes a number of other + UARTs, I2Cs, SPIs, PWMs etc. All these peripherals are connected to all 64 + GPIOs such that any GPIO can be set up to be controlled by any of the + peripherals. + Note that signal group 0 doesn't map any of the GPIOs to pins, and only + signal group 1 maps the GPIOs to the pins named PAD_GPIO[0] to PAD_GPIO[63]. + +maintainers: + - Emil Renner Berthing + - Drew Fustini + +properties: + compatible: + const: starfive,jh7100-pinctrl + + reg: + minItems: 2 + maxItems: 2 + + reg-names: + items: + - const: gpio + - const: padctl + + clocks: + maxItems: 1 + + resets: + maxItems: 1 + + gpio-controller: true + + "#gpio-cells": + const: 2 + + interrupts: + maxItems: 1 + description: The GPIO parent interrupt. + + interrupt-controller: true + + "#interrupt-cells": + const: 2 + + starfive,signal-group: + description: | + Select one of the 7 signal groups. If this property is not set it + defaults to the configuration already chosen by the earlier boot stages. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3, 4, 5, 6] + +required: + - compatible + - reg + - reg-names + - clocks + - gpio-controller + - "#gpio-cells" + - interrupts + - interrupt-controller + - "#interrupt-cells" + +patternProperties: + '-[0-9]+$': + type: object + patternProperties: + '-pins$': + type: object + description: | + A pinctrl node should contain at least one subnode representing the + pinctrl groups available on the machine. Each subnode will list the + pins it needs, and how they should be configured, with regard to + muxer configuration, bias, input enable/disable, input schmitt + trigger enable/disable, slew-rate and drive strength. + $ref: "/schemas/pinctrl/pincfg-node.yaml" + + properties: + pins: + description: | + The list of pin identifiers that properties in the node apply to. + This should be set using either the PAD_GPIO or PAD_FUNC_SHARE + macros. + Either this or "pinmux" has to be specified, but not both. + $ref: "/schemas/pinctrl/pinmux-node.yaml#/properties/pins" + + pinmux: + description: | + The list of GPIOs and their mux settings that properties in the + node apply to. This should be set using the GPIOMUX macro. + Either this or "pins" has to be specified, but not both. + $ref: "/schemas/pinctrl/pinmux-node.yaml#/properties/pinmux" + + bias-disable: true + + bias-pull-up: + type: boolean + + bias-pull-down: + type: boolean + + drive-strength: + enum: [ 14, 21, 28, 35, 42, 49, 56, 63 ] + + input-enable: true + + input-disable: true + + input-schmitt-enable: true + + input-schmitt-disable: true + + slew-rate: + maximum: 7 + + starfive,strong-pull-up: + description: enable strong pull-up. + type: boolean + + additionalProperties: false + + additionalProperties: false + +additionalProperties: false + +examples: + - | + #include + #include + #include + + soc { + #address-cells = <2>; + #size-cells = <2>; + + pinctrl@11910000 { + compatible = "starfive,jh7100-pinctrl"; + reg = <0x0 0x11910000 0x0 0x10000>, + <0x0 0x11858000 0x0 0x1000>; + reg-names = "gpio", "padctl"; + clocks = <&clkgen JH7100_CLK_GPIO_APB>; + resets = <&clkgen JH7100_RSTN_GPIO_APB>; + interrupts = <32>; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + starfive,signal-group = <6>; + + gmac_pins_default: gmac-0 { + gtxclk-pins { + pins = ; + bias-pull-up; + drive-strength = <35>; + input-enable; + input-schmitt-enable; + slew-rate = <0>; + }; + miitxclk-pins { + pins = ; + bias-pull-up; + drive-strength = <14>; + input-enable; + input-schmitt-disable; + slew-rate = <0>; + }; + tx-pins { + pins = , + , + , + , + , + , + , + , + ; + bias-disable; + drive-strength = <35>; + input-disable; + input-schmitt-disable; + slew-rate = <0>; + }; + rxclk-pins { + pins = ; + bias-pull-up; + drive-strength = <14>; + input-enable; + input-schmitt-disable; + slew-rate = <6>; + }; + rxer-pins { + pins = ; + bias-pull-up; + drive-strength = <14>; + input-enable; + input-schmitt-disable; + slew-rate = <0>; + }; + rx-pins { + pins = , + , + , + , + , + , + , + , + , + , + , + , + ; + bias-pull-up; + drive-strength = <14>; + input-enable; + input-schmitt-enable; + slew-rate = <0>; + }; + }; + + i2c0_pins_default: i2c0-0 { + i2c-pins { + pinmux = , + ; + bias-disable; /* external pull-up */ + input-enable; + input-schmitt-enable; + }; + }; + + uart3_pins_default: uart3-0 { + rx-pins { + pinmux = ; + bias-pull-up; + input-enable; + input-schmitt-enable; + }; + tx-pins { + pinmux = ; + bias-disable; + input-disable; + input-schmitt-disable; + }; + }; + }; + + gmac { + pinctrl-0 = <&gmac_pins_default>; + pinctrl-names = "default"; + }; + + i2c0 { + pinctrl-0 = <&i2c0_pins_default>; + pinctrl-names = "default"; + }; + + uart3 { + pinctrl-0 = <&uart3_pins_default>; + pinctrl-names = "default"; + }; + }; + +...