From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 5F57A3E1216; Wed, 17 Jun 2026 10:00:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781690402; cv=none; b=BJ2gor1NO0p+X49vvymTw2VHun9jdU26+acKOzby9VO+tGKkD2IDQi9Zm5bazt4tjw2z1Ft8RVWSycbr/Jp3HqesrFJqZw3szr6IYMNsMFsgLW34orvwq+jd66Qfua7UHtF9pa1E/nIfhjCiwbEyY1oyIQO+WOX2l1U472NaTCc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781690402; c=relaxed/simple; bh=uQ2IxnI5PBbEK+vSVRZY0b0+hKZufqL3dFY/NKgEynE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Iiy3BpX4CiFHwD1GyJSx8hIBHllaWU7k2iTrtooylgG9yHL67xOvEhMDNKpnQ84TGVFjJsx3epnIA64wGlHd+wIT2N4xE6In7CkATeORj4drH4uKsGNZvABcpggCdPTgKltY/Q3zOoiSMQo+v9W9jVkbHVNY/TcXVeWCPkBNAM0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=fb4KH2eg; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="fb4KH2eg" 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 125F92E8E; Wed, 17 Jun 2026 02:59:55 -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 63E6A3F915; Wed, 17 Jun 2026 02:59:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1781690399; bh=uQ2IxnI5PBbEK+vSVRZY0b0+hKZufqL3dFY/NKgEynE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fb4KH2egIRDRjwAOvCEK9JUixNmbOr4tnpIYvgtFlsXP0LvcktPpwHXUNErbHHcpr MJDY3O2zl8+vRW01sdRkB0sT9m7TlKVq10SmkeKi+FmBxCDG9zA8bZfHVN+ZO0/eko qU5wbefLXSocyDoXhnqPoG0PuG1jh2k0KNiSd7Uo= 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 v7 12/13] powercap: arm_scmi: Add get_power_uw to synthetic node Date: Wed, 17 Jun 2026 10:59:09 +0100 Message-ID: <20260617095910.1963578-13-philip.radford@arm.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260617095910.1963578-1-philip.radford@arm.com> References: <20260617095910.1963578-1-philip.radford@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- V6->V7 - Fixed commit message length 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 d45e4af0cdc7..e1bad4b19990 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 { @@ -411,9 +414,37 @@ 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