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 A0F73C79FB7 for ; Wed, 9 Sep 2026 22:05:39 +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=4P5uW8OANJdu1qQJkd42yjb4jRlQuBbGi6urUBtxQMU=; b=PgavZD5UmAVX8jghHZoLHcY4vq zvnmp8sOv9I/W8cF8J6G6RRaWPuQYl9SarxPyE+9q+LEXLqu6McqmjPeAw9K5zohqV8bHspvEM3p/ 1fGiJihsveYR5dupCBjRq8W3rEKNRVt4abWk2FOgLtOi2PNvMPX+WdBzBs+KoBI9hJluYv+mup8nv IsR2ayQqp3AE/cxb4LUMJs2MY4vnpyz8QjAkmnu9Zgw/xygmxxNzLzP+/bp+xJXRjM8+D/fIEtdMm y7MHrIAzWF1PIevbg5NQjrdzWSflQJ0w2lIev7R08plhO+R2EUuodtPki7JhgOWq8MSUJp9rNMklY 4YEWOyAQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4QQ9-0000000CyXg-0ta2; Wed, 09 Sep 2026 22:05:33 +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 1x4QPu-0000000CyF1-00G9 for linux-arm-kernel@lists.infradead.org; Wed, 09 Sep 2026 22:05:19 +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 CEB7D1D31; Wed, 9 Sep 2026 15:05:13 -0700 (PDT) Received: from oss-apollo7005.lab.cambridge.arm.com (oss-apollo7005.lab.cambridge.arm.com [10.7.15.171]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5F04E3F7D8; Wed, 9 Sep 2026 15:05:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1788991517; bh=yzdZeYTmEZftojUpT9D3ZlNs2/1bcHwNlWKDhmH6rjY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=styYlpZ6A25hcY3/Lug1In80sdVOazJ5jYSfhtg+Einh5vto7DMDCL3X8knill71h sh1xiSZNVwzfkHQJ2PTnJRDLV5KMU3yUnOfAeiT33cOctwnQx4hHdUst4MfStjM0pe i2/3CH2UvjDW5W5M0fk5wWEpYDSgEJykACJrseYo= 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@arm.com Subject: [PATCH v9 12/13] powercap: arm_scmi: Add get_power_uw to synthetic node Date: Wed, 9 Sep 2026 22:04:36 +0000 Message-Id: <20260909220437.1254412-13-philip.radford@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260909220437.1254412-1-philip.radford@arm.com> References: <20260909220437.1254412-1-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-20260909_150518_088857_C5D1CA52 X-CRM114-Status: GOOD ( 14.50 ) 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 --- V8->V9 - Removed redundant if (!pr) check from instance_root_get_power_uw() - Stopped returning a partial sum if one child read fails --- drivers/powercap/arm_scmi_powercap.c | 34 ++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/drivers/powercap/arm_scmi_powercap.c b/drivers/powercap/arm_scmi_powercap.c index b5397d7675e6..aac0b00490b2 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 { @@ -453,9 +456,36 @@ 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; + + 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) { + dev_dbg(child->dev, "Failed to read child power: %d\n", ret); + return ret; + } + + acc += p; + } + + *power_uw = acc; return 0; } -- 2.25.1