From patchwork Wed May 20 21:47:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Drew Fustini X-Patchwork-Id: 11561641 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E455613B4 for ; Wed, 20 May 2020 21:48:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C23C320823 for ; Wed, 20 May 2020 21:48:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=beagleboard-org.20150623.gappssmtp.com header.i=@beagleboard-org.20150623.gappssmtp.com header.b="BaSJqr4Y" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728464AbgETVsE (ORCPT ); Wed, 20 May 2020 17:48:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728465AbgETVsD (ORCPT ); Wed, 20 May 2020 17:48:03 -0400 Received: from mail-ed1-x534.google.com (mail-ed1-x534.google.com [IPv6:2a00:1450:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 333A2C05BD43 for ; Wed, 20 May 2020 14:48:02 -0700 (PDT) Received: by mail-ed1-x534.google.com with SMTP id i16so4868555edv.1 for ; Wed, 20 May 2020 14:48:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=beagleboard-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:subject:message-id:mime-version:content-disposition; bh=Kyo2f5vBjOejQSTLMvLemzfEmnvvCgnANFAtIidNMNM=; b=BaSJqr4YQrZTV3EbsPkdys3+KbWfs/o6alx6gevB8E1X0RmMN+O2+81qqCollfI03A rt9qPp6myNMysuU8lXIgDp1DZ+nzqm8/K765BMtbpfCXUuKWOCmw090349srORNXv1zf IOFMe2hl0IVF5xQH4pJ1eLG0O/KGUQlbpj/LbVcK109Qoht0NVYFbo3EFrfY5Pgyj2us tEq7V/3AKmKsZvXOfPDX1dAoGeLZymNKQYRcUrLftl/gQQwrR6aiiA172sT6BaqItc+Z dzlf1icIlR9CuQa00TQqOI2T3LswZSxkcFbBh+dLFHo7OGxdKr+a5E99nzy4mkvHB1G6 fX1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:mime-version :content-disposition; bh=Kyo2f5vBjOejQSTLMvLemzfEmnvvCgnANFAtIidNMNM=; b=GM9k13++l9XxLG1A94E31IaLNIc0Y4AOqfGtas2Uaxx/7aCyuT5LfmK3QaO5C4ahf9 O4GZrHNv05PbIiFRE/Zu1mxKWpwpSSCIBgSfvg02uGVra0m1odXz/1Iblz0CtGFmK2vM 36+FKXPAsFJpDMxC9izgBto+RnFyfEj5aOUsM7XHGosFQDpP3FfUwlDF4lOeAO0/SZ4A QLMFBB622wbExsOLmN9TYXlmsqIGk4qJ2qxfDVNjOjdkD9RLjCmNStDIXjLRzKSOBaXQ 4FjVp+7+nd/L9/9Va9dbafcnKYXv5uu6jxOFsqhskJpm94ZJh2eiUdTLrhFSs8aNHn6I Wjog== X-Gm-Message-State: AOAM53060pnt9IW0bf/9JfvgoQ5P7rIMZn1WexfX03type2xqQLH8N3I 8KFCa2xJnlL+5aNvmDKBZo1Mdw== X-Google-Smtp-Source: ABdhPJzSnNnZCmj9LYMj2ywMeBbo/cJh1P5GocaMK/tl9oIwfSMm6VuYQVIc2Vg+cUQZ+2V2EhEJtA== X-Received: by 2002:a05:6402:154b:: with SMTP id p11mr5377650edx.355.1590011280695; Wed, 20 May 2020 14:48:00 -0700 (PDT) Received: from x1 ([2001:16b8:5c90:fc01:e5e5:b2fe:677e:9a51]) by smtp.gmail.com with ESMTPSA id a13sm2766199eds.6.2020.05.20.14.47.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 May 2020 14:47:59 -0700 (PDT) Date: Wed, 20 May 2020 23:47:57 +0200 From: Drew Fustini To: Linus Walleij , Grygorii Strashko , =?iso-8859-1?q?Beno=EEt?= Cousson , Tony Lindgren , Rob Herring , Linux-OMAP , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Jason Kridner , Robert Nelson Subject: [PATCH v2] arm: dts: am33xx-bone-common: add gpio-line-names Message-ID: <20200520214757.GA362547@x1> MIME-Version: 1.0 Content-Disposition: inline Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Add gpio-line-names properties to the GPIO controller nodes. BeagleBone boards have P8 and P9 headers [0] which expose many of the AM3358 ZCZ SoC balls to stacking expansion boards called "capes", or to other external connections like jumper wires connected to a breadboard. BeagleBone users will often refer to the "Cape Exanpsion Headers" pin diagram [1] as it is in the "Bone101" getting started tutorial. [2] Most of the P8 and P9 header pins can muxed to a GPIO line. The gpio-line-names describe which P8 or P9 pin that line goes to and the default mux for that P8 or P9 pin if it is not GPIO. For example, gpiochip 1 line 0 is connected to P8 header pin 25 (P8_25) however the default device tree has the corresponding BGA ball (ZCZ U7) muxed to mmc1_dat0 as it is used for the on-board eMMC chip. For that GPIO line to be used, one would need to modify the device tree to disable the eMMC and change the pin mux for that ball to GPIO mode. Some of the AM3358 ZCZ balls corresponding to GPIO lines are not routed to a P8 or P9 header, but are instead wired to some peripheral device like on-board eMMC, HDMI framer IC, or status LEDs. Those names are in brackets to denote those GPIO lines can not be used. Some GPIO lines are named "[NC]" as the corresponding balls are not routed to anything on the PCB. The goal for these names is to make it easier for a user viewing the output of gpioinfo to determine which P8 or P9 pin is connected to a GPIO line. The output of gpioinfo on a BeagleBone Black would be: debian@beaglebone:~$ gpioinfo gpiochip0 - 32 lines: line 0: "[ethernet]" unused input active-high line 1: "[ethernet]" unused input active-high line 2: "P9_22 [spi0_sclk]" unused input active-high line 3: "P9_21 [spi0_d0]" unused input active-high line 4: "P9_18 [spi0_d1]" unused input active-high line 5: "P9_17 [spi0_cs0]" unused input active-high line 6: "[sd card]" "cd" input active-low [used] line 7: "P9_42A [ecappwm0]" unused input active-high line 8: "P8_35 [hdmi]" unused input active-high line 9: "P8_33 [hdmi]" unused input active-high line 10: "P8_31 [hdmi]" unused input active-high line 11: "P8_32 [hdmi]" unused input active-high line 12: "P9_20 [i2c2_sda]" unused input active-high line 13: "P9_19 [i2c2_scl]" unused input active-high line 14: "P9_26 [uart1_rxd]" unused input active-high line 15: "P9_24 [uart1_txd]" unused input active-high line 16: "[ethernet]" unused input active-high line 17: "[ethernet]" unused input active-high line 18: "[usb]" unused input active-high line 19: "[hdmi]" unused input active-high line 20: "P9_41B" unused input active-high line 21: "[ethernet]" unused input active-high line 22: "P8_19 [ehrpwm2a]" unused input active-high line 23: "P8_13 [ehrpwm2b]" unused input active-high line 24: "[NC]" unused input active-high line 25: "[NC]" unused input active-high line 26: "P8_14" unused input active-high line 27: "P8_17" unused input active-high line 28: "[ethernet]" unused input active-high line 29: "[ethernet]" unused input active-high line 30: "P9_11 [uart4_rxd]" unused input active-high line 31: "P9_13 [uart4_txd]" unused input active-high gpiochip1 - 32 lines: line 0: "P8_25 [emmc]" unused input active-high line 1: "[emmc]" unused input active-high line 2: "P8_5 [emmc]" unused input active-high line 3: "P8_6 [emmc]" unused input active-high line 4: "P8_23 [emmc]" unused input active-high line 5: "P8_22 [emmc]" unused input active-high line 6: "P8_3 [emmc]" unused input active-high line 7: "P8_4 [emmc]" unused input active-high line 8: "[NC]" unused input active-high line 9: "[NC]" unused input active-high line 10: "[NC]" unused input active-high line 11: "[NC]" unused input active-high line 12: "P8_12" unused input active-high line 13: "P8_11" unused input active-high line 14: "P8_16" unused input active-high line 15: "P8_15" unused input active-high line 16: "P9_15A" unused input active-high line 17: "P9_23" unused input active-high line 18: "P9_14 [ehrpwm1a]" unused input active-high line 19: "P9_16 [ehrpwm1b]" unused input active-high line 20: "[emmc]" unused input active-high line 21: "[usr0 led]" "beaglebone:green:heartbeat" output active-high [used] line 22: "[usr1 led]" "beaglebone:green:mmc0" output active-high [used] line 23: "[usr2 led]" "beaglebone:green:usr2" output active-high [used] line 24: "[usr3 led]" "beaglebone:green:usr3" output active-high [used] line 25: "[hdmi]" "interrupt" input active-high [used] line 26: "[usb]" unused input active-high line 27: "[hdmi audio]" "enable" output active-high [used] line 28: "P9_12" unused input active-high line 29: "P8_26" unused input active-high line 30: "P8_21 [emmc]" unused input active-high line 31: "P8_20 [emmc]" unused input active-high gpiochip2 - 32 lines: line 0: "P9_15B" unused input active-high line 1: "P8_18" unused input active-high line 2: "P8_7" unused input active-high line 3: "P8_8" unused input active-high line 4: "P8_10" unused input active-high line 5: "P8_9" unused input active-high line 6: "P8_45 [hdmi]" unused input active-high line 7: "P8_46 [hdmi]" unused input active-high line 8: "P8_43 [hdmi]" unused input active-high line 9: "P8_44 [hdmi]" unused input active-high line 10: "P8_41 [hdmi]" unused input active-high line 11: "P8_42 [hdmi]" unused input active-high line 12: "P8_39 [hdmi]" unused input active-high line 13: "P8_40 [hdmi]" unused input active-high line 14: "P8_37 [hdmi]" unused input active-high line 15: "P8_38 [hdmi]" unused input active-high line 16: "P8_36 [hdmi]" unused input active-high line 17: "P8_34 [hdmi]" unused input active-high line 18: "[ethernet]" unused input active-high line 19: "[ethernet]" unused input active-high line 20: "[ethernet]" unused input active-high line 21: "[ethernet]" unused input active-high line 22: "P8_27 [hdmi]" unused input active-high line 23: "P8_29 [hdmi]" unused input active-high line 24: "P8_28 [hdmi]" unused input active-high line 25: "P8_30 [hdmi]" unused input active-high line 26: "[emmc]" unused input active-high line 27: "[emmc]" unused input active-high line 28: "[emmc]" unused input active-high line 29: "[emmc]" unused input active-high line 30: "[emmc]" unused input active-high line 31: "[emmc]" unused input active-high gpiochip3 - 32 lines: line 0: "[ethernet]" unused input active-high line 1: "[ethernet]" unused input active-high line 2: "[ethernet]" unused input active-high line 3: "[ethernet]" unused input active-high line 4: "[ethernet]" unused input active-high line 5: "[i2c0]" unused input active-high line 6: "[i2c0]" unused input active-high line 7: "[emu]" unused input active-high line 8: "[emu]" unused input active-high line 9: "[ethernet]" unused input active-high line 10: "[ethernet]" unused input active-high line 11: "[NC]" unused input active-high line 12: "[NC]" unused input active-high line 13: "[usb]" unused input active-high line 14: "P9_31 [spi1_sclk]" unused input active-high line 15: "P9_29 [spi1_d0]" unused input active-high line 16: "P9_30 [spi1_d1]" unused input active-high line 17: "P9_28 [spi1_cs0]" unused input active-high line 18: "P9_42B [ecappwm0]" unused input active-high line 19: "P9_27" unused input active-high line 20: "P9_41A" unused input active-high line 21: "P9_25" unused input active-high line 22: "[NC]" unused input active-high line 23: "[NC]" unused input active-high line 24: "[NC]" unused input active-high line 25: "[NC]" unused input active-high line 26: "[NC]" unused input active-high line 27: "[NC]" unused input active-high line 28: "[NC]" unused input active-high line 29: "[NC]" unused input active-high line 30: "[NC]" unused input active-high line 31: "[NC]" unused input active-high [0] https://git.io/JfgOd [1] https://beagleboard.org/capes [1] https://beagleboard.org/Support/bone101 [2] https://beagleboard.org/static/images/cape-headers.png Reviewed-by: Jason Kridner Reviewed-by: Robert Nelson Signed-off-by: Drew Fustini --- arch/arm/boot/dts/am335x-bone-common.dtsi | 144 ++++++++++++++++++++++ 1 file changed, 144 insertions(+) diff --git a/arch/arm/boot/dts/am335x-bone-common.dtsi b/arch/arm/boot/dts/am335x-bone-common.dtsi index 6c9187bc0f17..d86e67b0e852 100644 --- a/arch/arm/boot/dts/am335x-bone-common.dtsi +++ b/arch/arm/boot/dts/am335x-bone-common.dtsi @@ -397,3 +397,147 @@ &rtc { clocks = <&clk_32768_ck>, <&clk_24mhz_clkctrl AM3_CLK_24MHZ_CLKDIV32K_CLKCTRL 0>; clock-names = "ext-clk", "int-clk"; }; + +&gpio0 { + gpio-line-names = + "[ethernet]", + "[ethernet]", + "P9_22 [spi0_sclk]", + "P9_21 [spi0_d0]", + "P9_18 [spi0_d1]", + "P9_17 [spi0_cs0]", + "[sd card]", + "P9_42A [ecappwm0]", + "P8_35 [hdmi]", + "P8_33 [hdmi]", + "P8_31 [hdmi]", + "P8_32 [hdmi]", + "P9_20 [i2c2_sda]", + "P9_19 [i2c2_scl]", + "P9_26 [uart1_rxd]", + "P9_24 [uart1_txd]", + "[ethernet]", + "[ethernet]", + "[usb]", + "[hdmi]", + "P9_41B", + "[ethernet]", + "P8_19 [ehrpwm2a]", + "P8_13 [ehrpwm2b]", + "[NC]", + "[NC]", + "P8_14", + "P8_17", + "[ethernet]", + "[ethernet]", + "P9_11 [uart4_rxd]", + "P9_13 [uart4_txd]"; +}; + +&gpio1 { + gpio-line-names = + "P8_25 [emmc]", + "[emmc]", + "P8_5 [emmc]", + "P8_6 [emmc]", + "P8_23 [emmc]", + "P8_22 [emmc]", + "P8_3 [emmc]", + "P8_4 [emmc]", + "[NC]", + "[NC]", + "[NC]", + "[NC]", + "P8_12", + "P8_11", + "P8_16", + "P8_15", + "P9_15A", + "P9_23", + "P9_14 [ehrpwm1a]", + "P9_16 [ehrpwm1b]", + "[emmc]", + "[usr0 led]", + "[usr1 led]", + "[usr2 led]", + "[usr3 led]", + "[hdmi]", + "[usb]", + "[hdmi audio]", + "P9_12", + "P8_26", + "P8_21 [emmc]", + "P8_20 [emmc]"; +}; + +&gpio2 { + gpio-line-names = + "P9_15B", + "P8_18", + "P8_7", + "P8_8", + "P8_10", + "P8_9", + "P8_45 [hdmi]", + "P8_46 [hdmi]", + "P8_43 [hdmi]", + "P8_44 [hdmi]", + "P8_41 [hdmi]", + "P8_42 [hdmi]", + "P8_39 [hdmi]", + "P8_40 [hdmi]", + "P8_37 [hdmi]", + "P8_38 [hdmi]", + "P8_36 [hdmi]", + "P8_34 [hdmi]", + "[ethernet]", + "[ethernet]", + "[ethernet]", + "[ethernet]", + "P8_27 [hdmi]", + "P8_29 [hdmi]", + "P8_28 [hdmi]", + "P8_30 [hdmi]", + "[emmc]", + "[emmc]", + "[emmc]", + "[emmc]", + "[emmc]", + "[emmc]"; +}; + +&gpio3 { + gpio-line-names = + "[ethernet]", + "[ethernet]", + "[ethernet]", + "[ethernet]", + "[ethernet]", + "[i2c0]", + "[i2c0]", + "[emu]", + "[emu]", + "[ethernet]", + "[ethernet]", + "[NC]", + "[NC]", + "[usb]", + "P9_31 [spi1_sclk]", + "P9_29 [spi1_d0]", + "P9_30 [spi1_d1]", + "P9_28 [spi1_cs0]", + "P9_42B [ecappwm0]", + "P9_27", + "P9_41A", + "P9_25", + "[NC]", + "[NC]", + "[NC]", + "[NC]", + "[NC]", + "[NC]", + "[NC]", + "[NC]", + "[NC]", + "[NC]"; +};