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 0C130CD4F52 for ; Mon, 18 May 2026 13:53:31 +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=jz4V+l2gDp4HUzq0FFgc9h+pu+X5Hs2dUFR69Y3a8qE=; b=Ncuv2wt2eUgII1OqpKfl9JFqva YM/y88gw1g5YCbbPxdKf140IqytpLQCaI7bM/8yh28ED4qFT+gdaZNoGju+AK8W2swHy5BZAYA8lA M8sPA8YBfHhxC0g/R0YGsFaPyk/v1AkA9n9xCAi1ZmebKitD78QWk8diY2AYlx9PQJx0I479vQpGN HfR789toSQoVAjDVicNHMmsmLGLDHdyDHjS5Inn4BAJryqSEJ1h6Zgo6cTNp2nYsLONGLpwN1Urs8 hsPMsN7mkqAM5uBoku6mhmsSgO1azX1cRgeZXLiQwseYc6Xl8pw2qklbVPH3/uDfh13o+vgHiitHw GG++KPVA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wOyPJ-0000000Fs9h-1vLp; Mon, 18 May 2026 13:53:21 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wOyPD-0000000Fs3T-37LL for linux-arm-kernel@lists.infradead.org; Mon, 18 May 2026 13:53:16 +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 6D6672328; Mon, 18 May 2026 06:53:09 -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 9BB493F7B4; Mon, 18 May 2026 06:53:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1779112394; bh=f9VAJAVk33CvV3c3BskgiL++l1yOos1V84XA6CDRE/c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y5q/kekgjz4HNRp5Vc6ajdvOol+jMXdHs4+O0bYIMyroet0jSlkQpvThUgby2+zuE dfHMc19qJ4hKOv54JM1DpxfajiS0MvFSxkQcyQLS+co2i3ig6+0pqjvN3efEge6Gxd gOtw0gOzCW9GC2shh6/DN8Te7nmlL9cbFsugRK/k= 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 v6 11/12] powercap: arm_scmi: Add get_power_uw to synthetic node Date: Mon, 18 May 2026 14:52:33 +0100 Message-ID: <20260518135234.2953532-12-philip.radford@arm.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260518135234.2953532-1-philip.radford@arm.com> References: <20260518135234.2953532-1-philip.radford@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260518_065315_825230_2786045A X-CRM114-Status: GOOD ( 14.87 ) 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 --- V5->V6 - Moved multiple u64 values to the same line - Reworked logic to walk SCMI zones and filter by parent - Added to_scmi_powercap_root macro --- drivers/powercap/arm_scmi_powercap.c | 35 ++++++++++++++++++++++++++-- 1 file changed, 33 insertions(+), 2 deletions(-) diff --git a/drivers/powercap/arm_scmi_powercap.c b/drivers/powercap/arm_scmi_powercap.c index 5e7b7a3b79f2..f1cb25a408bb 100644 --- a/drivers/powercap/arm_scmi_powercap.c +++ b/drivers/powercap/arm_scmi_powercap.c @@ -17,6 +17,9 @@ #define to_scmi_powercap_zone(z) \ container_of(z, struct scmi_powercap_zone, zone) +#define to_scmi_powercap_root(z) \ + container_of(z, struct scmi_powercap_root, instance_root.zone) + static const struct scmi_powercap_proto_ops *powercap_ops; struct scmi_powercap_zone { @@ -273,9 +276,37 @@ 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_root *pr = to_scmi_powercap_root(pz); + struct scmi_powercap_zone *child; + + u64 p, acc = 0; + int i, ret; + + if (!pz || !power_uw) + return -EINVAL; + + if (!pr) + return -ENODEV; + + for (i = 0; i < pr->num_zones; i++) { + child = &pr->spzones[i]; + + if (!child->registered || child->invalid) + continue; + + if (child->info->parent_id != SCMI_POWERCAP_ROOT_ZONE_ID) + 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