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 888F53ECBC4; Tue, 28 Apr 2026 09:10:06 +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=1777367407; cv=none; b=gyzl8vXPGpwZ7Ip7B98QUITQxSbMg0kZHBCPCyqfEcDZYeDFVY5fwOW6GZnE14CIstobrikJ3DzD7Rw0jwrI7nLyZfe5k04xLjgJLFJXtIe6hN8RAvr/J3ZWIk+Eo8ns2fC+kait5+FZgeINpMUJ9ijTi5nMbufJE2ulCuBd7SE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777367407; c=relaxed/simple; bh=oOi5+FezjQ1e4aYyhZu1Gg6yAKds2xcysyHCBosKTyo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=enp8VI1J8rW+yCu1EP3OdzR8vmT5aJOHz+hOqTjhUOBiF/UyrhzAMZ1s0VCW1w2utXiiQFhMmoQkvDQaLBsZdVF3T4Gt3as0QKin36InfXtySyDMNCw2JlZH0H2HXo3i3ILFyRPmpH4R6wayxtrniIa0acyRXc3MT88Sk8PGU8s= 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=PB4Qye36; 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="PB4Qye36" 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> Precedence: bulk X-Mailing-List: linux-pm@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 --- 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