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 EB6F83EF0A8; Tue, 28 Apr 2026 09:10:08 +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=1777367410; cv=none; b=FfxRyGbedZOxgYGjsjS9bxncr5hlGotVfSmPiPbX3F7iG4ztkK9tS6xPV6s/i07wY9413zw4Xd45XRtmogp/Jw5EWWoEsXTXOqxsOxLoBdXnxchTtCVvV8BAaPg2WsdBxF/jHFmIekPPBTAD1+DM5EY9mgmI2oEOUbofYZh3el0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777367410; c=relaxed/simple; bh=JUOAYUoA6ZULBMyS9cgEcmGlJ6DkFAap892e25+ywaQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lMx/eHXYTgOCH8lk8vpXS6yonf8I2MWCmgOygWgA1PrpezdwTRYIbRIFBOdafJ0pTfNCFzVPyQbkDTQzBxg+ifi1rKULzOjbzzfOOldkwtpdT97oHOmrhgyHwMIZFn3bVaZKD1jS1mZNhEnS9+TdNJMgAlM4hf6kS6x9aWQY7SI= 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=ZVJraegf; 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="ZVJraegf" 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 0E8CE15A1; Tue, 28 Apr 2026 02:10:03 -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 3B2433F62B; Tue, 28 Apr 2026 02:10:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1777367408; bh=JUOAYUoA6ZULBMyS9cgEcmGlJ6DkFAap892e25+ywaQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZVJraegfG9O8iooQVT2WNbzCPlvjOV49BNZvoeGwVD6sMzmVT+jAf/F2g3o2YwUqG wloV5dRDS/I+bud801RIyS4/RTiRjHsV7aCccgWKMfNYVOD37FTMg2H08QieNBVgqB RR283x7tkLOAU8yAgvQc2dNp353q29NPkpqORTMU= 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 12/12] powercap: arm_scmi: Synthetic zone enable/disable Date: Tue, 28 Apr 2026 10:09:21 +0100 Message-ID: <20260428090922.346069-13-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 Add functionality to disable and enable the synthetic zone which also affects the immediate children of the synthetic zone by applying the same command to them. Signed-off-by: Philip Radford --- drivers/powercap/arm_scmi_powercap.c | 81 ++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) diff --git a/drivers/powercap/arm_scmi_powercap.c b/drivers/powercap/arm_scmi_powercap.c index 81b5214acda4..1ed2949b06cb 100644 --- a/drivers/powercap/arm_scmi_powercap.c +++ b/drivers/powercap/arm_scmi_powercap.c @@ -270,6 +270,85 @@ static int instance_root_release(struct powercap_zone *pz) return 0; } +static int instance_root_set_enable_state(struct powercap_zone *pz, bool enable) +{ + struct scmi_powercap_zone *root; + struct scmi_powercap_root *pr; + struct scmi_powercap_zone *child; + int ret, first_err = 0; + + if (!pz) + return -EINVAL; + + root = to_scmi_powercap_zone(pz); + pr = container_of(root, struct scmi_powercap_root, instance_root); + + list_for_each_entry(child, &pr->registered_zones[0], node) { + if (child == &pr->instance_root) + continue; + + if (child->info->parent_id != SCMI_POWERCAP_ROOT_ZONE_ID) + continue; + + if (!child->info->cpli[0].cap_config) + continue; + + ret = powercap_ops->cap_enable_set(child->ph, child->info->id, enable); + + if (ret && !first_err) { + first_err = ret; + dev_err(child->dev, "failed to %s zone %s: %d\n", + enable ? "enable" : "disable", + child->info->name, ret); + } + } + + return first_err; +} + +static int instance_root_set_enable(struct powercap_zone *pz, bool mode) +{ + return instance_root_set_enable_state(pz, mode); +} + +static int instance_root_get_enable(struct powercap_zone *pz, bool *mode) +{ + struct scmi_powercap_zone *root; + struct scmi_powercap_root *pr; + struct scmi_powercap_zone *child; + bool enabled; + int ret; + + if (!pz || !mode) + return -EINVAL; + + root = to_scmi_powercap_zone(pz); + pr = container_of(root, struct scmi_powercap_root, instance_root); + + *mode = true; + + list_for_each_entry(child, &pr->registered_zones[0], node) { + if (child == &pr->instance_root) + continue; + if (child->info->parent_id != SCMI_POWERCAP_ROOT_ZONE_ID) + continue; + if (!child->info->cpli[0].cap_config) + continue; + + ret = powercap_ops->cap_enable_get(child->ph, child->info->id, &enabled); + + if (ret) + return ret; + + if (!enabled) { + *mode = false; + return 0; + } + } + + return 0; +} + static int instance_root_get_power_uw(struct powercap_zone *pz, u64 *power_uw) { struct scmi_powercap_zone *root = to_scmi_powercap_zone(pz); @@ -315,6 +394,8 @@ static const struct powercap_zone_ops instance_root_ops = { .get_max_power_range_uw = scmi_powercap_get_max_power_range_uw, .get_power_uw = instance_root_get_power_uw, .release = instance_root_release, + .set_enable = instance_root_set_enable, + .get_enable = instance_root_get_enable, }; static const struct powercap_zone_constraint_ops instance_root_const_ops = { -- 2.47.3