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 56FEBFF8868 for ; Tue, 28 Apr 2026 09:10:29 +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=CqeCF8jgBL7WeLx3cJsDtGjbHqiNTCngREx3jtwEHR8=; b=ht8sDC4ODqJpbHwPi8d3kbH2Ew CxtZCG8b0uTV7dcjZPKfRgswrey2J+AdVp08L7BP1SQO256lZzT0b9S1l7X3yT8nlUw+R5ITyako6 jOz51hF+cQxQt8hbwf/i45jfXt60Spp84JE9ucgULXChTgQgPkD0857p4pkXPZt5qZK+cPJEe87PP DJtaLDTFv2fKbSkIwsiyGM+AfKZHGal98yX8PPNfxMuwibAGbB3U0kGvkaq88i74B4ow5KBhRbxtM SEJdrBhHXGeYRVYxO5zaIDxgFJGzRA0/hx8neq6d+YVsjIU16QKDojIP+SCpbPYJnv0+Oux2g3hs5 Bs5bYIbw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHeSX-000000012Mu-1jcT; Tue, 28 Apr 2026 09:10:25 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHeSE-00000001251-31Hy for linux-arm-kernel@lists.infradead.org; Tue, 28 Apr 2026 09:10:08 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6C50515A1; Tue, 28 Apr 2026 02:10:00 -0700 (PDT) Received: from donnerap.manchester.arm.com (donnerap.manchester.arm.com [10.33.8.81]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 98DD43F62B; Tue, 28 Apr 2026 02:10:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1777367405; bh=oOi5+FezjQ1e4aYyhZu1Gg6yAKds2xcysyHCBosKTyo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PB4Qye368hQF247pfeKONgd9KffNTVB+6mns4vpxfnYS3Af2Sm3C8nFbGy7yirghc +BtF6RgfwYNP49ABKyT43K7eMq7QvtvBPHSXn4Vott8GDxcmWUN6zg02SNvoRkkBV6 WdWTEabO8+9fpkBOpMHcD19jqr86xTlb8vsXEEt0= From: Philip Radford To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, arm-scmi@vger.kernel.org, linux-pm@vger.kernel.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, etienne.carriere@st.com, peng.fan@oss.nxp.com, michal.simek@amd.com, quic_sibis@quicinc.com, dan.carpenter@linaro.org, d-gole@ti.com, souvik.chakravarty@arm.com, Philip Radford Subject: [PATCH v5 11/12] powercap: arm_scmi: Add get_power_uw to synthetic node Date: Tue, 28 Apr 2026 10:09:20 +0100 Message-ID: <20260428090922.346069-12-philip.radford@arm.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260428090922.346069-1-philip.radford@arm.com> References: <20260428090922.346069-1-philip.radford@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260428_021006_859906_C9B0B869 X-CRM114-Status: GOOD ( 12.32 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Exposes the current power usage from the immediate children of the synthetic (root) powercap node. Iterates over pr->spzones and sums per-zone power. Signed-off-by: Philip Radford --- drivers/powercap/arm_scmi_powercap.c | 29 ++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/drivers/powercap/arm_scmi_powercap.c b/drivers/powercap/arm_scmi_powercap.c index d74869af1633..81b5214acda4 100644 --- a/drivers/powercap/arm_scmi_powercap.c +++ b/drivers/powercap/arm_scmi_powercap.c @@ -270,9 +270,34 @@ static int instance_root_release(struct powercap_zone *pz) return 0; } -static int instance_root_get_power_uw(struct powercap_zone *pz, u64 *v) +static int instance_root_get_power_uw(struct powercap_zone *pz, u64 *power_uw) { - *v = 0; + struct scmi_powercap_zone *root = to_scmi_powercap_zone(pz); + struct scmi_powercap_zone *child; + struct scmi_powercap_root *pr; + u64 acc = 0; + u64 p; + int ret; + + if (!pz || !power_uw) + return -EINVAL; + + pr = container_of(root, struct scmi_powercap_root, instance_root); + if (!pr) + return -ENODEV; + + list_for_each_entry(child, &pr->registered_zones[0], node) { + if (child == &pr->instance_root) + continue; + + ret = scmi_powercap_get_power_uw(&child->zone, &p); + if (!ret) + acc += p; + else + dev_dbg(child->dev, "Failed to read child power: %u\n", ret); + } + + *power_uw = acc; return 0; } -- 2.47.3