From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756628AbbA2SN2 (ORCPT ); Thu, 29 Jan 2015 13:13:28 -0500 Received: from mailout3.w1.samsung.com ([210.118.77.13]:25326 "EHLO mailout3.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752248AbbA2SNX (ORCPT ); Thu, 29 Jan 2015 13:13:23 -0500 X-AuditID: cbfec7f5-b7fc86d0000066b7-a3-54ca77ae643b From: Karol Wrona To: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Cc: "Rafael J. Wysocki" , Amit Daniel Kachhap , Ulf Hansson , Bartlomiej Zolnierkiewicz , Kyungmin Park , Karol Wrona , Karol Wrona Subject: [RFC PATCH 1/1] PM / domains: Add support for virtual power domains Date: Thu, 29 Jan 2015 19:12:56 +0100 Message-id: <1422555176-13054-2-git-send-email-k.wrona@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1422555176-13054-1-git-send-email-k.wrona@samsung.com> References: <1422555176-13054-1-git-send-email-k.wrona@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpkluLIzCtJLcpLzFFi42I5/e/4Vd115adCDE6tsbZouBpisXHGelaL +UfOsVqcWrafyeJs0xt2i8u75rBZfO49wmhx5vQlVovja8Mt9qzbwuTA5bFz1l12jzvX9rB5 bLnazuLRt2UVo8fnTXIBrFFcNimpOZllqUX6dglcGa3vdrEWNElUTH13ib2B8bFwFyMnh4SA icS2+S8YIWwxiQv31rOB2EICSxkl5jwTgLD7mCTmnBIHsdkE1CWadyxmBrFFBCIkjt/qZe1i 5OJgFtjAJPFhygsmkISwgI/E/M2bwQaxCKhKfH89HWwBr4CzxKlVO1i6GDmAlilIzJlkAxLm FHCRuDthLTPELmeJp4c+MU9g5F3AyLCKUTS1NLmgOCk910ivODG3uDQvXS85P3cTIyTYvu5g XHrM6hCjAAejEg/vjE0nQ4RYE8uKK3MPMUpwMCuJ8M4rPhUixJuSWFmVWpQfX1Sak1p8iJGJ g1OqgXFZ1/+Z4s3CZZJh+lsMzAv//wivbQxnb17otV9B/6bH6oRZ0+RzljCYer7Z+l73zw/D k/ut804/dD2RWOuxKuuWWsmyVesT+xZv+tPS4nxC403O+bnzZum5xhsdWOn7qGDjND99q5i7 Rqc4Gk0t9rswyn8zVTsv6+HMeeiI+ff969qMnvAdzVBiKc5INNRiLipOBACwOt49FAIAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There are the power domains which are turned off or put to retention only during suspend or special processor states. In such case there is a need to register some devices which belong to such domain that PM core could know the state of such devices and decide which power mode should be chosen i.e. the domain can not be put to retention if some devices are active. Virtual power domain has empty power_on/off callbacks as there is no need to gate anything. Signed-off-by: Karol Wrona --- drivers/base/power/Makefile | 3 +- drivers/base/power/pm_domains_virt.c | 54 ++++++++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+), 1 deletion(-) create mode 100644 drivers/base/power/pm_domains_virt.c diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile index 1cb8544..360a0e2 100644 --- a/drivers/base/power/Makefile +++ b/drivers/base/power/Makefile @@ -2,7 +2,8 @@ obj-$(CONFIG_PM) += sysfs.o generic_ops.o common.o qos.o runtime.o obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o obj-$(CONFIG_PM_TRACE_RTC) += trace.o obj-$(CONFIG_PM_OPP) += opp.o -obj-$(CONFIG_PM_GENERIC_DOMAINS) += domain.o domain_governor.o +obj-$(CONFIG_PM_GENERIC_DOMAINS) += domain.o domain_governor.o \ + pm_domains_virt.o obj-$(CONFIG_HAVE_CLK) += clock_ops.o ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG diff --git a/drivers/base/power/pm_domains_virt.c b/drivers/base/power/pm_domains_virt.c new file mode 100644 index 0000000..bd4d6b6 --- /dev/null +++ b/drivers/base/power/pm_domains_virt.c @@ -0,0 +1,54 @@ +/* + * Copyright (C) 2015, Samsung Electronics Co. Ltd. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include +#include +#include +#include + +static int pd_power_off(struct generic_pm_domain *domain) +{ + return 0; +} + +static int pd_power_on(struct generic_pm_domain *domain) +{ + return 0; +} + +int __init virt_pm_domains_init(void) +{ + struct device_node *np; + + for_each_compatible_node(np, NULL, "linux,virtual-pm-domains") { + struct generic_pm_domain *pd; + + pd = kzalloc(sizeof(*pd), GFP_KERNEL); + if (!pd) + return -ENOMEM; + + pd->power_off = pd_power_off; + pd->power_on = pd_power_on; + pd->name = kstrdup(np->name, GFP_KERNEL); + if (!pd->name) + return -ENOMEM; + + pm_genpd_init(pd, NULL, false); + of_genpd_add_provider_simple(np, pd); + } + + return 0; +} +arch_initcall(virt_pm_domains_init); -- 1.7.9.5