From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E238CC44507 for ; Thu, 9 Jul 2026 09:57:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=IGS4xa617bTzeR6KQL6sDpcq2So7IhszuqJtV9dz6uY=; b=3vyoBDqx9hcQHZczFqCPPra5/A roN3cBxRJsh+2U9HK76jp/NP6SWZ0A7YXBt6BPGu9wksQS1aXu7I4A+NVXeXHoShcjNoLmIEkcLtM pxtWenWLuYQQWRgI1ZnZEfbkmShqJJcS8/rCBIwu34qLiDJ9r5obhIMeWnaW84tclkEA2NcGRghdE SqzeNxRT3oMX0UGeEU1aXajZztkoYfXqD0joV2muuZAMiIz5b1h54vTHJeZ35xTggUoUlye1e1IEr fPwb+X7z0PlhlIsEvBiIcIitfHc8reWIm5bAGCKw6u2Qs4kmq/mQjnTK7Z0J8Q6X3uQ9z8r9qtazN JZvn6IYg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1whlW0-00000001oxR-3PZO; Thu, 09 Jul 2026 09:57:56 +0000 Received: from mail-pl1-x632.google.com ([2607:f8b0:4864:20::632]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1whlVx-00000001ou2-3oRE for linux-mediatek@lists.infradead.org; Thu, 09 Jul 2026 09:57:55 +0000 Received: by mail-pl1-x632.google.com with SMTP id d9443c01a7336-2caf4496889so5279995ad.1 for ; Thu, 09 Jul 2026 02:57:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1783591073; x=1784195873; darn=lists.infradead.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:content-type; bh=IGS4xa617bTzeR6KQL6sDpcq2So7IhszuqJtV9dz6uY=; b=RNUzF0Ue6uma6hy7UA2Mrkt/ZFxmfBUdvI5FRpFQ9FBW0ifI+wjJ/Q6jooxPeGrtQc aFVXe7QJ0NLkRanSQVEWzAqGieyhOq8nS5bqNX8zM7+G0/SzM/XO0AdlLX+xGJLGDEP1 Pcs5YEswIDPnjjZ9LIZ0lUegq5Zx88ktXpBAs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783591073; x=1784195873; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=IGS4xa617bTzeR6KQL6sDpcq2So7IhszuqJtV9dz6uY=; b=S1QNMmAv+lCf2n3MNIivkhdFG1S1y98MUa+rvS7AaeoStgXANKE2026qri6Xbu4cm1 lgMd36TipZT7Bgkio9w+VRii7seCPcgE7lh4wZ9ZEaX9w7T0IXRfGKUaf7GBQcbPt4D3 pcGtOGp+XgA6CTzvj01/priLAzqSZgCBbsP/D1wmNXkqF8zJ8/okQvL7MiHUJuRVYy+E Rh+9BMSKPk1EyLBsJeui6TcLaTT6meAjTBPCC1PtQ1FdDZaR7Zb4OdpVf+jBcUJx57kJ cW8MzYB0BBKzwTdjuKmDWVZ9lQiQnkjE+vumcMHcTzgR+H9c6uMYP/p82I1RXy0B0n/5 i7GQ== X-Forwarded-Encrypted: i=1; AHgh+Rousk6p5SvD2zOCZ4hRINm2g7JSUAIh3KwZYu21xwaUhNV1tYs8AInvTR7lLXCxpM1WH1iZ1UY5zVb0RywhNg==@lists.infradead.org X-Gm-Message-State: AOJu0YxIe5uLyYbsBqmv6PYYYp+bwUffMbdK/a1tnwaWiH1OsGj/2LUI 0w4gCCgL8CbJT2PUDR2mPCyOHfhCmlg3APv7Xoh+/UdfOzrcIXZL1oyQPxx1+ak+zw== X-Gm-Gg: AfdE7cl8A+A7R4BjIZWGSlmpypE8qppsgt5VJHAS3mT3cwrrEimv0dlCuARUpxuAfMO M0TgodFuAH2xrfeyuLyjsa6u8UnwGs8YW2ijVXCE+Sgltf6l0bWr2VtSfszQPW3mBNeWUEo5C/N M3ngVpSkXbeqoSIpiyB9v991VI4Rl9e+AGfXIOzBzVF431mBMbPq7WSjBiMm7VcBqhWZR7IOyQu LIXL1G0FnR6X0L6iC4XmefJK40JxLqyG4rt2dUUGkvMjcusDTTNzi5CPQsmw+RGCSE/17XToQLX 1YhLJ6qg0t+s5LoyG6lCxYVKU64Px+dWLqE68Qj3paDV7SyHCwlEDrgU0QgUTSPbvzzZqUdS4OJ /2L7N2OXLYhoxJUObY2ra6kOoJzPu8UtTsezmmmGnmS3o5Avk8sQMEhYpz9uDUdG/ZKA2jR8bRW 0X+qwsOZHjwPznHhRSyoAqycmcMv7cWTDaMiCwAbYrTZwzyK43ok6nC6FXoODVXV+vw89Fag== X-Received: by 2002:a17:902:d2ce:b0:2cc:841d:cd7e with SMTP id d9443c01a7336-2cdd8b2ebdamr22781535ad.21.1783591073109; Thu, 09 Jul 2026 02:57:53 -0700 (PDT) Received: from wenstp920.tpe.corp.google.com ([2a00:79e0:201d:8:bd09:6ddb:180a:69c5]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ccc9d5bd2fsm41082155ad.78.2026.07.09.02.57.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Jul 2026 02:57:52 -0700 (PDT) From: Chen-Yu Tsai To: Bartosz Golaszewski , Greg Kroah-Hartman , Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , "Rafael J. Wysocki" , Danilo Krummrich , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno Cc: Chen-Yu Tsai , linux-acpi@vger.kernel.org, driver-core@lists.linux.dev, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Manivannan Sadhasivam , Alan Stern , Bartosz Golaszewski Subject: [PATCH v4 03/14] power: sequencing: Add pwrseq_power_is_on() Date: Thu, 9 Jul 2026 17:57:08 +0800 Message-ID: <20260709095726.704448-4-wenst@chromium.org> X-Mailer: git-send-email 2.55.0.795.g602f6c329a-goog In-Reply-To: <20260709095726.704448-1-wenst@chromium.org> References: <20260709095726.704448-1-wenst@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260709_025753_956320_0D01AABB X-CRM114-Status: GOOD ( 12.46 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org The power sequencing consumer API already does power on state tracking internally. Expose the state to consumers through pwrseq_power_is_on() so that they don't have to reimplement it locally. Acked-by: Bartosz Golaszewski Signed-off-by: Chen-Yu Tsai --- Changes since v3: - Added missing stub function for !POWER_SEQUENCING Changes since v2: - New patch Needs to go in with "usb: hub: Power on connected M.2 E-key connectors" as it is a build time dependency. Side question: I wonder if making the !POWER_SEQUENCING return success would make developers' lives better? At least that is what the clk and regulator consumer APIs do. --- drivers/power/sequencing/core.c | 18 ++++++++++++++++++ include/linux/pwrseq/consumer.h | 6 ++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/power/sequencing/core.c b/drivers/power/sequencing/core.c index 02f42da91598..72b96d36920e 100644 --- a/drivers/power/sequencing/core.c +++ b/drivers/power/sequencing/core.c @@ -968,6 +968,24 @@ int pwrseq_power_off(struct pwrseq_desc *desc) } EXPORT_SYMBOL_GPL(pwrseq_power_off); +/** + * pwrseq_power_is_on() - Queries the last requested state of the power sequencer. + * @desc: Descriptor referencing the power sequencer. + * + * This returns the last requested state of the power sequencer. + * + * Returns: + * On success, 1 for on and 0 for off; negative error number on failure. + */ +int pwrseq_power_is_on(struct pwrseq_desc *desc) +{ + if (!desc) + return -EINVAL; + + return desc->powered_on; +} +EXPORT_SYMBOL_GPL(pwrseq_power_is_on); + /** * pwrseq_to_device() - Get the pwrseq device pointer from a descriptor. * @desc: Descriptor referencing the power sequencer. diff --git a/include/linux/pwrseq/consumer.h b/include/linux/pwrseq/consumer.h index 3c907c9e1885..3c6122bd0205 100644 --- a/include/linux/pwrseq/consumer.h +++ b/include/linux/pwrseq/consumer.h @@ -22,6 +22,7 @@ devm_pwrseq_get(struct device *dev, const char *target); int pwrseq_power_on(struct pwrseq_desc *desc); int pwrseq_power_off(struct pwrseq_desc *desc); +int pwrseq_power_is_on(struct pwrseq_desc *desc); struct device *pwrseq_to_device(struct pwrseq_desc *desc); @@ -53,6 +54,11 @@ static inline int pwrseq_power_off(struct pwrseq_desc *desc) return -ENOSYS; } +static inline int pwrseq_power_is_on(struct pwrseq_desc *desc) +{ + return -ENOSYS; +} + static inline struct device *pwrseq_to_device(struct pwrseq_desc *desc) { return NULL; -- 2.55.0.795.g602f6c329a-goog