From patchwork Thu May 20 10:13:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Lee X-Patchwork-Id: 443684 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2A428C43470 for ; Thu, 20 May 2021 10:16:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1182F6144A for ; Thu, 20 May 2021 10:16:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236157AbhETKRe (ORCPT ); Thu, 20 May 2021 06:17:34 -0400 Received: from twspam01.aspeedtech.com ([211.20.114.71]:63567 "EHLO twspam01.aspeedtech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236472AbhETKPX (ORCPT ); Thu, 20 May 2021 06:15:23 -0400 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 14KA1ABH077452; Thu, 20 May 2021 18:01:10 +0800 (GMT-8) (envelope-from steven_lee@aspeedtech.com) Received: from slee-VirtualBox.localdomain (192.168.100.253) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 20 May 2021 18:13:48 +0800 From: Steven Lee To: Rob Herring , Joel Stanley , "Andrew Jeffery" , Adrian Hunter , "Ulf Hansson" , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , "moderated list:ARM/ASPEED MACHINE SUPPORT" , "moderated list:ARM/ASPEED MACHINE SUPPORT" , open list , "moderated list:ASPEED SD/MMC DRIVER" , "open list:ASPEED SD/MMC DRIVER" CC: , , , Subject: [PATCH v4 1/3] ARM: dts: aspeed: ast2600evb: Add sdhci node and gpio regulator for A2 evb. Date: Thu, 20 May 2021 18:13:43 +0800 Message-ID: <20210520101346.16772-2-steven_lee@aspeedtech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210520101346.16772-1-steven_lee@aspeedtech.com> References: <20210520101346.16772-1-steven_lee@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.100.253] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 14KA1ABH077452 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org AST2600 A2(or newer) EVB has gpio regulators for toggling signal voltage between 3.3v and 1.8v, the patch adds sdhci node and gpio regulator in the new dts file and adds commment for describing the reference design. Signed-off-by: Steven Lee --- arch/arm/boot/dts/aspeed-ast2600-evb-a2.dts | 98 +++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 arch/arm/boot/dts/aspeed-ast2600-evb-a2.dts diff --git a/arch/arm/boot/dts/aspeed-ast2600-evb-a2.dts b/arch/arm/boot/dts/aspeed-ast2600-evb-a2.dts new file mode 100644 index 000000000000..d581e8069a82 --- /dev/null +++ b/arch/arm/boot/dts/aspeed-ast2600-evb-a2.dts @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +// Copyright 2021 IBM Corp. + +#include "aspeed-ast2600-evb.dts" +#include + +/ { + model = "AST2600 A2 EVB"; + compatible = "aspeed,ast2600"; + + vcc_sdhci0: regulator-vcc-sdhci0 { + compatible = "regulator-fixed"; + regulator-name = "SDHCI0 Vcc"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + gpios = <&gpio0 168 + GPIO_ACTIVE_HIGH>; + enable-active-high; + }; + + vccq_sdhci0: regulator-vccq-sdhci0 { + compatible = "regulator-gpio"; + regulator-name = "SDHCI0 VccQ"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <3300000>; + gpios = <&gpio0 169 + GPIO_ACTIVE_HIGH>; + gpios-states = <1>; + states = <3300000 1>, + <1800000 0>; + }; + + vcc_sdhci1: regulator-vcc-sdhci1 { + compatible = "regulator-fixed"; + regulator-name = "SDHCI1 Vcc"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + gpios = <&gpio0 170 + GPIO_ACTIVE_HIGH>; + enable-active-high; + }; + + vccq_sdhci1: regulator-vccq-sdhci1 { + compatible = "regulator-gpio"; + regulator-name = "SDHCI1 VccQ"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <3300000>; + gpios = <&gpio0 171 + GPIO_ACTIVE_HIGH>; + gpios-states = <1>; + states = <3300000 1>, + <1800000 0>; + }; +}; + +&sdc { + status = "okay"; +}; + +/* + * The signal voltage of sdhci0 and sdhci1 on AST2600-A2 EVB is able to be + * toggled by GPIO pins. + * In the reference design, GPIOV0 of AST2600-A2 EVB is connected to the + * power load switch that providing 3.3v to sdhci0 vdd, GPIOV1 is connected to + * a 1.8v and a 3.3v power load switch that providing signal voltage to + * sdhci0 bus. + * If GPIOV0 is active high, sdhci0 is enabled, otherwise, sdhci0 is disabled. + * If GPIOV1 is active high, 3.3v power load switch is enabled, sdhci0 signal + * voltage is 3.3v, otherwise, 1.8v power load switch will be enabled, + * sdhci0 signal voltage becomes 1.8v. + * AST2600-A2 EVB also support toggling signal voltage for sdhci1. + * The design is the same as sdhci0, it uses GPIOV2 as power-gpio and GPIOV3 + * as power-switch-gpio. + */ +&sdhci0 { + status = "okay"; + bus-width = <4>; + max-frequency = <100000000>; + sdhci-drive-type = /bits/ 8 <3>; + sdhci-caps-mask = <0x7 0x0>; + sdhci,wp-inverted; + vmmc-supply = <&vcc_sdhci0>; + vqmmc-supply = <&vccq_sdhci0>; + clk-phase-sd-hs = <7>, <200>; +}; + +&sdhci1 { + status = "okay"; + bus-width = <4>; + max-frequency = <100000000>; + sdhci-drive-type = /bits/ 8 <3>; + sdhci-caps-mask = <0x7 0x0>; + sdhci,wp-inverted; + vmmc-supply = <&vcc_sdhci1>; + vqmmc-supply = <&vccq_sdhci1>; + clk-phase-sd-hs = <7>, <200>; +}; +