From patchwork Fri Nov 17 11:31:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 166123 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:9910:0:b0:403:3b70:6f57 with SMTP id i16csp460170vqn; Fri, 17 Nov 2023 03:33:26 -0800 (PST) X-Google-Smtp-Source: AGHT+IFVOz2vnufOdkLSXE+erkzdsK94rjn4GdkehCZ2Ez2o/NNosgCYSAmwWo4tuTbGd4mU31AL X-Received: by 2002:a17:903:22c3:b0:1cc:361b:7b10 with SMTP id y3-20020a17090322c300b001cc361b7b10mr12928352plg.24.1700220806238; Fri, 17 Nov 2023 03:33:26 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1700220806; cv=none; d=google.com; s=arc-20160816; b=taBUg+mzFsOM3/CknHhnDW2GEREmuLxhIki8Ih3whILzf02QsVlfTensXt310kAP5e opNr05EkXkP6VZFt+RZNTg3RYej+WPW38NkAwaoxER7ixS9kBNJs+ydyW79vge89LAXb 9WuncnJlCLUuFCEB+UIj2x1DXcXoMInsMN7LxXxxmTi5lhZwhOwpiEDmjwjZiVrlIbv9 SqfL7rUH5GwVwWcZOBbrLW347FTZ+kwBltzrsrpNSlN2Mrem3iEGmOycZ5J2meqW38H1 LQOf0J2GGc7WZ8WkMf3oxotluSETmK/UULnc/+MLes/Oh5erjKcBA1c0liPbAYMyZ4Pu CMnw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=iV1dPK+qFqPRDJI+CfbVqRXQOp1WtOLshkrEfx4KyGw=; fh=KOtNjZfRPCjQZphSIMptO02uH7FbEAONyvdGOPNH0yk=; b=ibLPNItzogj2HvqmISuj7FUmZGi9cUnDOJEuJbzQazA8a+tZ49YsErayWJQ+Hry8n5 DEDic4odT0A58x9PY0G0XKiFr2rvEVg4lQEVBkE98NmUNh+c0VS+PwzjegXNHwWbst1i QbmDJMCK2spV7frTSwY0UvUJ0MGecTe3n0cn1M3vA0YeENvYX3/+Tn0CdJ13y6KBOoZJ 6aaB0d1dRtivrTaY/hsfFl+7s5xWGSLb8ZlULrzhNA0ENAKpLM3NcuyJXwrtCjaRjZCq R69K3077QaIj4eBVJAQrux9f6XquC1qiik/Ca3OSk/jsZC7gEhF7dlW6uRDohvRWB1qL dCng== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b="K/5XVGdO"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from lipwig.vger.email (lipwig.vger.email. [2620:137:e000::3:3]) by mx.google.com with ESMTPS id b13-20020a170902d50d00b001ce63150c60si389037plg.377.2023.11.17.03.33.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Nov 2023 03:33:26 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) client-ip=2620:137:e000::3:3; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b="K/5XVGdO"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by lipwig.vger.email (Postfix) with ESMTP id 62793822743D; Fri, 17 Nov 2023 03:33:08 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at lipwig.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345925AbjKQLcY (ORCPT + 30 others); Fri, 17 Nov 2023 06:32:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44994 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345992AbjKQLcV (ORCPT ); Fri, 17 Nov 2023 06:32:21 -0500 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9E00D50; Fri, 17 Nov 2023 03:32:09 -0800 (PST) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-6c33ab26dddso1773406b3a.0; Fri, 17 Nov 2023 03:32:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700220729; x=1700825529; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=iV1dPK+qFqPRDJI+CfbVqRXQOp1WtOLshkrEfx4KyGw=; b=K/5XVGdOBmGVQ4GyFSaKA4U7f50AiS1q8rWBKRw22wAo3l94LgRih6bZRLbOxtp2V/ bIRt6dS7F/oXXIBM1i6evbrfRJ1QVkThY51teNDvkY6XFh+0cjPJ6Kno3yyG2jNuXaGE LEar0zSalHCZwnhKvgvDNvJkGAAjUg9qa8hKCIlcSB7lD8Um/Jye+wxzw9fR8urFYJPy 5N8QEey4AloAOACtnoHaAmhAWtaetryYgEXxTKTdmw5R5+Xltdz5BIVjGPsVep1eyjD1 8jgXPM4+ltOdEwBhvMJDLXDa0kJsvTL64nPdzV2x8E3kBT8pmI2tOiWeiN1v0mRbRt0l YMLA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700220729; x=1700825529; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=iV1dPK+qFqPRDJI+CfbVqRXQOp1WtOLshkrEfx4KyGw=; b=lnocvhNqDE3gG1Pi30THvydp9zMM7ROIIVu8SSO8sOm0Is5YkkaI8Hr15nAwIXZFHV 9Jk13s47TiXXI341Yb3s33PPgH+eeYt5tif7R4uUGBOLekMA/Cqe+bFpL2Dqxjn3LUnm lB0aT3OQkpYuFU2HAiwfY0B5lujs4ZqXhojOiHJNPKQCCnpvpA7qIF0hKd6LsIEHF978 9eiai5LiY0h/mJD3IBDKv1jBb070+9oJkCTu3YLcoiUTLPEGVMNjtbhkpw9xDy/d6QAx zzm1NMXUhn2WEfyHukpQgb6gXegaHplxAC4NRI/VHjWxyxnUOVn6gCESI9W7hkt6G1pL YZLg== X-Gm-Message-State: AOJu0YylDceTMjd1wmy2EJw2hW+x7HdtOitbHZIl74Jva1+2ig+Rn2FQ F9YSsDy5uXzUUEa25x/y7L4= X-Received: by 2002:a05:6a00:39a5:b0:6c3:4cac:f9ad with SMTP id fi37-20020a056a0039a500b006c34cacf9admr18566981pfb.19.1700220729119; Fri, 17 Nov 2023 03:32:09 -0800 (PST) Received: from localhost.localdomain (2001-b400-e286-d458-bc89-d4cd-bd42-ffb5.emome-ip6.hinet.net. [2001:b400:e286:d458:bc89:d4cd:bd42:ffb5]) by smtp.gmail.com with ESMTPSA id u2-20020a631402000000b005b4b70738e5sm1229224pgl.8.2023.11.17.03.32.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Nov 2023 03:32:08 -0800 (PST) From: Victor Shih To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, benchuanggli@gmail.com, HL.Liu@genesyslogic.com.tw, Greg.tu@genesyslogic.com.tw, takahiro.akashi@linaro.org, dlunev@chromium.org, Victor Shih Subject: [PATCH V13 04/21] mmc: core: Extend support for mmc regulators with a vqmmc2 Date: Fri, 17 Nov 2023 19:31:32 +0800 Message-Id: <20231117113149.9069-5-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231117113149.9069-1-victorshihgli@gmail.com> References: <20231117113149.9069-1-victorshihgli@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-0.6 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Fri, 17 Nov 2023 03:33:08 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1782810732132625250 X-GMAIL-MSGID: 1782810732132625250 From: Ulf Hansson To allow an additional external regulator to be controlled by an mmc host driver, let's add support for a vqmmc2 regulator to the mmc core. For an SD UHS-II interface the vqmmc2 regulator may correspond to the so called vdd2 supply, as described by the SD spec. Initially, only 1.8V is needed, hence limit the new helper function, mmc_regulator_set_vqmmc2() to this too. Note that, to allow for flexibility mmc host drivers need to manage the enable/disable of the vqmmc2 regulator themselves, while the regulator is looked up through the common mmc_regulator_get_supply(). Signed-off-by: Ulf Hansson --- Updates in V10: - Modify the commit message. Updates in V4: - Moved the voltage defines into this patch. --- drivers/mmc/core/regulator.c | 34 ++++++++++++++++++++++++++++++++++ include/linux/mmc/host.h | 11 +++++++++++ 2 files changed, 45 insertions(+) diff --git a/drivers/mmc/core/regulator.c b/drivers/mmc/core/regulator.c index 005247a49e51..208c27cfa505 100644 --- a/drivers/mmc/core/regulator.c +++ b/drivers/mmc/core/regulator.c @@ -226,6 +226,33 @@ int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios) } EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc); +/** + * mmc_regulator_set_vqmmc2 - Set vqmmc2 as per the ios->vqmmc2_voltage + * @mmc: The mmc host to regulate + * @ios: The io bus settings + * + * Sets a new voltage level for the vqmmc2 regulator, which may correspond to + * the vdd2 regulator for an SD UHS-II interface. This function is expected to + * be called by mmc host drivers. + * + * Returns a negative error code on failure, zero if the voltage level was + * changed successfully or a positive value if the level didn't need to change. + */ +int mmc_regulator_set_vqmmc2(struct mmc_host *mmc, struct mmc_ios *ios) +{ + if (IS_ERR(mmc->supply.vqmmc2)) + return -EINVAL; + + switch (ios->vqmmc2_voltage) { + case MMC_VQMMC2_VOLTAGE_180: + return mmc_regulator_set_voltage_if_supported( + mmc->supply.vqmmc2, 1700000, 1800000, 1950000); + default: + return -EINVAL; + } +} +EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc2); + #else static inline int mmc_regulator_get_ocrmask(struct regulator *supply) @@ -252,6 +279,7 @@ int mmc_regulator_get_supply(struct mmc_host *mmc) mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc"); mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc"); + mmc->supply.vqmmc2 = devm_regulator_get_optional(dev, "vqmmc2"); if (IS_ERR(mmc->supply.vmmc)) { if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER) @@ -271,6 +299,12 @@ int mmc_regulator_get_supply(struct mmc_host *mmc) dev_dbg(dev, "No vqmmc regulator found\n"); } + if (IS_ERR(mmc->supply.vqmmc2)) { + if (PTR_ERR(mmc->supply.vqmmc2) == -EPROBE_DEFER) + return -EPROBE_DEFER; + dev_dbg(dev, "No vqmmc2 regulator found\n"); + } + return 0; } EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 9d7c6b575303..093de2a8f5de 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -74,6 +74,9 @@ struct mmc_ios { #define MMC_SIGNAL_VOLTAGE_180 1 #define MMC_SIGNAL_VOLTAGE_120 2 + unsigned char vqmmc2_voltage; +#define MMC_VQMMC2_VOLTAGE_180 0 + unsigned char drv_type; /* driver type (A, B, C, D) */ #define MMC_SET_DRIVER_TYPE_B 0 @@ -331,6 +334,7 @@ struct mmc_pwrseq; struct mmc_supply { struct regulator *vmmc; /* Card power supply */ struct regulator *vqmmc; /* Optional Vccq supply */ + struct regulator *vqmmc2; /* Optional supply for phy */ }; struct mmc_ctx { @@ -613,6 +617,7 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc, struct regulator *supply, unsigned short vdd_bit); int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios); +int mmc_regulator_set_vqmmc2(struct mmc_host *mmc, struct mmc_ios *ios); #else static inline int mmc_regulator_set_ocr(struct mmc_host *mmc, struct regulator *supply, @@ -626,6 +631,12 @@ static inline int mmc_regulator_set_vqmmc(struct mmc_host *mmc, { return -EINVAL; } + +static inline int mmc_regulator_set_vqmmc2(struct mmc_host *mmc, + struct mmc_ios *ios) +{ + return -EINVAL; +} #endif int mmc_regulator_get_supply(struct mmc_host *mmc);