From patchwork Wed Jun 22 19:36:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lina Iyer X-Patchwork-Id: 639381 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3rZZcS23KVz9t0N for ; Thu, 23 Jun 2016 05:37:28 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.b=I4UFG6mK; dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751854AbcFVTh0 (ORCPT ); Wed, 22 Jun 2016 15:37:26 -0400 Received: from mail-pa0-f54.google.com ([209.85.220.54]:33020 "EHLO mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751453AbcFVThZ (ORCPT ); Wed, 22 Jun 2016 15:37:25 -0400 Received: by mail-pa0-f54.google.com with SMTP id b13so19608006pat.0 for ; Wed, 22 Jun 2016 12:37:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=WR78YE4jihYsBRTCNiEpV4paVq1QURlCPe2WP36CWxo=; b=I4UFG6mKa8Lvs4xq4YG+Q6ggRSj69J58UEylYTfYMjt9JmDvDPgA1/KB70nCIwGf14 1LxBN/jxyzESIZ0m4UzFx5x4u5GtYF472+/09stvJQ3ofEIArkzWP0o63NuIA0SO8Jo8 CoTictWL0nV69SP1S6HgCqu7mZuG2AdlhB2FA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=WR78YE4jihYsBRTCNiEpV4paVq1QURlCPe2WP36CWxo=; b=O7VKzVTYXXKjWx8j+w19pcyIb/EPRYDlIMcE8Xrlp5iGiknvkWrWlUc2vCHEXlKJ9p a7D+p5ZNyoHedmECN4C7ZihgiEs/sueftb4IXy7o0GuQoZU9zoJ0WnDB3pmtMHJknMKf 3koPXhs2B/WkIJZkbCKTr7wREMX2USwUzrhypGrsIhGxpVCsJGjQx5xSBbnVKH13X3lv dV7c+8/bRBVDJWnzfFGUBb6yddTmIF60qRUFVIIk64OaAEsFvCLe4Db5906x/eFvoVjQ w1oWSoplroOopunS6hPHaoRTAtj9Dm96DUDcmWp9pQMStfuAuO5cmp4AzseCWc9nSaE0 sYEw== X-Gm-Message-State: ALyK8tJVtq0xzstnpyDuwQ2UgWBQcRBu7H3jtxAiHGfQpA/spvJiCForSXgDPpYXitxW8AXD X-Received: by 10.66.194.68 with SMTP id hu4mr36571465pac.23.1466624244460; Wed, 22 Jun 2016 12:37:24 -0700 (PDT) Received: from ubuntu.localdomain ([172.56.9.151]) by smtp.gmail.com with ESMTPSA id t4sm1563368paw.32.2016.06.22.12.37.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 22 Jun 2016 12:37:23 -0700 (PDT) From: Lina Iyer To: ulf.hansson@linaro.org, khilman@kernel.org, rjw@rjwysocki.net, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: geert@linux-m68k.org, k.kozlowski@samsung.com, andy.gross@linaro.org, sboyd@codeaurora.org, linux-arm-msm@vger.kernel.org, lorenzo.pieralisi@arm.com, ahaslam@baylibre.com, mtitinger@baylibre.com, Axel Haslam , devicetree@vger.kernel.org, Marc Titinger , Lina Iyer Subject: [PATCH 02/14] dt/bindings: update binding for PM domain idle states Date: Wed, 22 Jun 2016 13:36:37 -0600 Message-Id: <1466624209-27432-3-git-send-email-lina.iyer@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1466624209-27432-1-git-send-email-lina.iyer@linaro.org> References: <1466624209-27432-1-git-send-email-lina.iyer@linaro.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Axel Haslam Update DT bindings to describe idle states of PM domains. Cc: Signed-off-by: Marc Titinger Signed-off-by: Lina Iyer [Lina: Added state properties, removed state names, wakeup-latency, added of_pm_genpd_init() API, pruned commit text] Signed-off-by: Ulf Hansson [Ulf: Moved around code to make it compile properly, rebased on top of multiple state support] --- .../devicetree/bindings/power/power_domain.txt | 70 ++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt index 025b5e7..41e8dda 100644 --- a/Documentation/devicetree/bindings/power/power_domain.txt +++ b/Documentation/devicetree/bindings/power/power_domain.txt @@ -29,6 +29,43 @@ Optional properties: specified by this binding. More details about power domain specifier are available in the next section. +- power-states : A phandle of an idle-state that shall be soaked into a + generic domain power state. + +==Power state== + +A PM domain power state describes an idle state of a domain and must be +have the following properties - + + - entry-latency-us + Usage: Not required if wakeup-latency-us is provided. + Value type: + Definition: u32 value representing worst case latency in + microseconds required to enter the idle state. + The exit-latency-us duration may be guaranteed + only after entry-latency-us has passed. + + - exit-latency-us + Usage: Not required if wakeup-latency-us is provided. + Value type: + Definition: u32 value representing worst case latency + in microseconds required to exit the idle state. + + - residency-us: + Usage: Optional + Value type: + Definition: A u32 value representing the time for which a + domain must be idle in the state to reap power saving benefits + of entering the state. + + - state-param: + Usage: Optional + Value type: + Definition: A u32 value as defined by the state. May be used + by the driver to hold state related u32 data. In the case of + PSCI, an extended state-id for the domain may be encoded in + this value. + Example: power: power-controller@12340000 { @@ -55,6 +92,39 @@ Example 2: #power-domain-cells = <1>; }; +Example 3: + + pm-domains { + a57_pd: a57_pd@ { + /* will have a57 platform ARM_PD_METHOD_OF_DECLARE*/ + compatible = "arm,pd","arm,cortex-a57"; + #power-domain-cells = <0>; + power-states = <&CLUSTER_SLEEP_0>; + }; + + a53_pd: a53_pd@ { + /* will have a a53 platform ARM_PD_METHOD_OF_DECLARE*/ + compatible = "arm,pd","arm,cortex-a53"; + #power-domain-cells = <0>; + power-states = <&CLUSTER_SLEEP_0>, <&CLUSTER_SLEEP_1>; + }; + + CLUSTER_SLEEP_0: power-state@0 { + entry-latency-us = <1000>; + exit-latency-us = <2000>; + residency-us = <10000>; + state-param = <0x1000010>; + }; + + CLUSTER_SLEEP_1: power-state@1 { + entry-latency-us = <5000>; + exit-latency-us = <5000>; + residency-us = <100000>; + state-param = <0x1000020>; + }; + }; + + The nodes above define two power controllers: 'parent' and 'child'. Domains created by the 'child' power controller are subdomains of '0' power domain provided by the 'parent' power controller.