From patchwork Thu Nov 27 14:51:49 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulf Hansson X-Patchwork-Id: 5396611 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 136D39F39B for ; Thu, 27 Nov 2014 14:52:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 32154200FE for ; Thu, 27 Nov 2014 14:52:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 53018201F4 for ; Thu, 27 Nov 2014 14:52:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751394AbaK0OwL (ORCPT ); Thu, 27 Nov 2014 09:52:11 -0500 Received: from mail-wi0-f180.google.com ([209.85.212.180]:52267 "EHLO mail-wi0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751273AbaK0OwI (ORCPT ); Thu, 27 Nov 2014 09:52:08 -0500 Received: by mail-wi0-f180.google.com with SMTP id n3so8581693wiv.1 for ; Thu, 27 Nov 2014 06:52:07 -0800 (PST) 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=f9y6CkKeWWIpkshQ8lTtYHN43U+bGzo/Osqz+F0h32w=; b=Lo8DP3cs+DSZkF+SzduKgpd78Oi0A32JMaS7Ky3l8C5N0Wuwd5ZL1EO+bn3WsVjn1R TLs+/qvZ4UucMMjW+M2PvejjsKIrhlR8oTEHXQMPIXJ6cS8Q66OxtEBLs3+W0in8oPuN 0czgLayRSQtcMKq3CAgWjDpF7U9xBcl88RnuBytHdYNSz3vGHhfBP1PmZrxvY3hYJoLX gUJSAsUwaboGm/lUJ2UQqLfdqFg/2xf9rFWyOAvTWHtOSmnNwk7DcLowKyz+DHXuOlrS RHfFwsT5SPsSZc5TghJasy6vLcwgHf2lvSqRO/sNfBhuFtCkI5oKhHoMvo+6M1trocXI 5RVQ== X-Gm-Message-State: ALoCoQlEZjPLOCKoSQRzrnfilinuEI8TMmkVMMrwiHC5kAVVK2Br0PCHPhZkRx2yhfUYnkRh92uq X-Received: by 10.194.62.144 with SMTP id y16mr3869394wjr.117.1417099927645; Thu, 27 Nov 2014 06:52:07 -0800 (PST) Received: from localhost.localdomain ([85.235.11.236]) by mx.google.com with ESMTPSA id l3sm11047581wje.12.2014.11.27.06.52.04 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 27 Nov 2014 06:52:06 -0800 (PST) From: Ulf Hansson To: "Rafael J. Wysocki" , Len Brown , Pavel Machek , linux-pm@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Geert Uytterhoeven , Kevin Hilman , Simon Horman , Magnus Damm , Russell King , Dmitry Torokhov , Sylwester Nawrocki , Grygorii Strashko , Arnd Bergmann , Ulf Hansson Subject: [PATCH V2 1/3] PM / Domains: Initial PM clock support for genpd Date: Thu, 27 Nov 2014 15:51:49 +0100 Message-Id: <1417099911-12688-2-git-send-email-ulf.hansson@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1417099911-12688-1-git-send-email-ulf.hansson@linaro.org> References: <1417099911-12688-1-git-send-email-ulf.hansson@linaro.org> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP It's quite common for PM domains to use PM clocks. Typically from SOC specific code, the per device PM clock list is created and pm_clk_suspend|resume() are invoked to handle clock gating/ungating. A step towards consolidation is to integrate PM clock support into genpd, which is what this patch does. In this initial step, the calls to the pm_clk_suspend|resume() are handled within genpd, but the per device PM clock list still needs to be created from SOC specific code. It seems reasonable to have gendp to handle that as well, but that left to future patches to address. It's not every users of genpd that are keen on using PM clocks thus we need to provide this a configuration option for genpd. Therefore let's add flag field in the genpd struct to keep this information and define a new PM_DOMAIN_PM_CLK bit can then be set at initialization. Signed-off-by: Ulf Hansson --- Changes in v2: Set ->start() callback to pm_clk_resume() and fixed comment. --- drivers/base/power/domain.c | 7 +++++++ include/linux/pm_domain.h | 3 +++ 2 files changed, 10 insertions(+) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 735c473..42ba5a0 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -1928,6 +1929,12 @@ void pm_genpd_init(struct generic_pm_domain *genpd, genpd->domain.ops.complete = pm_genpd_complete; genpd->dev_ops.save_state = pm_genpd_default_save_state; genpd->dev_ops.restore_state = pm_genpd_default_restore_state; + + if (genpd->flags & PM_DOMAIN_PM_CLK) { + genpd->dev_ops.stop = pm_clk_suspend; + genpd->dev_ops.start = pm_clk_resume; + } + mutex_lock(&gpd_list_lock); list_add(&genpd->gpd_list_node, &gpd_list); mutex_unlock(&gpd_list_lock); diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 8cbd32e..4ba06a4f 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -76,6 +77,8 @@ struct generic_pm_domain { struct device *dev); void (*detach_dev)(struct generic_pm_domain *domain, struct device *dev); + unsigned int flags; /* Bit field of configs for genpd */ +#define PM_DOMAIN_PM_CLK BIT(0) /* PM domain uses PM clk */ }; static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)