From patchwork Thu Aug 25 19:51:35 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lina Iyer X-Patchwork-Id: 74715 Delivered-To: patch@linaro.org Received: by 10.140.29.52 with SMTP id a49csp1012699qga; Thu, 25 Aug 2016 12:53:40 -0700 (PDT) X-Received: by 10.98.111.133 with SMTP id k127mr19421987pfc.90.1472154802996; Thu, 25 Aug 2016 12:53:22 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id p11si16919143par.193.2016.08.25.12.53.22; Thu, 25 Aug 2016 12:53:22 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-arm-msm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org; spf=pass (google.com: best guess record for domain of linux-arm-msm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-arm-msm-owner@vger.kernel.org; dmarc=fail (p=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755237AbcHYTxN (ORCPT + 8 others); Thu, 25 Aug 2016 15:53:13 -0400 Received: from mail-pf0-f181.google.com ([209.85.192.181]:36498 "EHLO mail-pf0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756764AbcHYTw0 (ORCPT ); Thu, 25 Aug 2016 15:52:26 -0400 Received: by mail-pf0-f181.google.com with SMTP id h186so20603754pfg.3 for ; Thu, 25 Aug 2016 12:52:07 -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=nDG4+1S/zooSNud+1+J4fXlSPDoOOjgBa7AT9LQtpwE=; b=a/SZVuF6i2+NEbe/5d65XyHePKxjpyrZorMgZvudrwUsWXgTRzRu0Y8fzxsMIRxt+o rUNkLhiRgFn8QUnBWNLeZrsDJwFILWfurV4wYlJvVbsumY9x0QDlGSNdH8xY3yw24xkd lH8YWooj/+Prru5nk65nxmHG+ae1ZKKWkI0AQ= 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=nDG4+1S/zooSNud+1+J4fXlSPDoOOjgBa7AT9LQtpwE=; b=SguVi5w6x7AxCEZc2Dg4DtQWp0ynu97Z8M5bbs03SHZb7Rs3vj+p5RYny44lN1C493 ykxWsweqNtcCMVy1SLSjYUTgLAhks4pZ1T9AAOGIr9Th15amjas8vaHfdAxnPYDMOlmU h4zhtpqzhcKcCX0weEkxIS7iAeFuTDEVD4+gN6b//RFVMdD7dIWoLbNOU00gK+VSA6GB toEaf03NO6eGVvGm0YKluaZIoRFQnzt7L1M0+pAL9X7CKsG9zo522b3YKEzRBbUWihzp Y/txc3QMEO+2P/pB+yUKIgomCZRKVPxjlT2+So09SlxNOqL+O5hT7WWgw6hewZ/zxNsA LT/A== X-Gm-Message-State: AE9vXwNtilLnQYP8OnsDdB/tJtPN/gfcuCQOYJ+wi6R0fbS9ri7Hg9iyQwH6F1p4jStUOi2a X-Received: by 10.98.41.195 with SMTP id p186mr19246780pfp.81.1472154726741; Thu, 25 Aug 2016 12:52:06 -0700 (PDT) Received: from ubuntu.localdomain (i-global254.qualcomm.com. [199.106.103.254]) by smtp.gmail.com with ESMTPSA id i62sm22783375pfg.62.2016.08.25.12.52.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 25 Aug 2016 12:52:05 -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: andy.gross@linaro.org, sboyd@codeaurora.org, linux-arm-msm@vger.kernel.org, brendan.jackman@arm.com, lorenzo.pieralisi@arm.com, sudeep.holla@arm.com, Juri.Lelli@arm.com, Lina Iyer Subject: [PATCH v4 05/16] PM / doc: Update device documentation for devices in IRQ safe PM domains Date: Thu, 25 Aug 2016 13:51:35 -0600 Message-Id: <1472154706-40119-6-git-send-email-lina.iyer@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1472154706-40119-1-git-send-email-lina.iyer@linaro.org> References: <1472154706-40119-1-git-send-email-lina.iyer@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Update documentation to reflect the changes made to support IRQ safe PM domains. Signed-off-by: Lina Iyer --- Documentation/power/devices.txt | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/Documentation/power/devices.txt b/Documentation/power/devices.txt index 8ba6625..a622136 100644 --- a/Documentation/power/devices.txt +++ b/Documentation/power/devices.txt @@ -607,7 +607,17 @@ individually. Instead, a set of devices sharing a power resource can be put into a low-power state together at the same time by turning off the shared power resource. Of course, they also need to be put into the full-power state together, by turning the shared power resource on. A set of devices with this -property is often referred to as a power domain. +property is often referred to as a power domain. A power domain may also be +nested inside another power domain. + +Devices, by default, operate in process context. If a device can operate in +IRQ safe context that has to be explicitly indicated by setting the irq_safe +boolean inside struct generic_pm_domain to be true. Power domains by default, +operate in process context but could have devices that are IRQ safe. Such +power domains cannot be powered on/off during runtime PM. On the other hand, +IRQ safe PM domains that have IRQ safe devices may be powered off when all +the devices are in idle. An IRQ safe domain may only be attached as a +subdomain to another IRQ safe domain. Support for power domains is provided through the pm_domain field of struct device. This field is a pointer to an object of type struct dev_pm_domain,