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[209.132.180.67]) by mx.google.com with ESMTP id kn6si4808284pab.36.2016.03.30.01.16.00; Wed, 30 Mar 2016 01:16:01 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932693AbcC3IPs (ORCPT + 29 others); Wed, 30 Mar 2016 04:15:48 -0400 Received: from mail-pa0-f42.google.com ([209.85.220.42]:35733 "EHLO mail-pa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758766AbcC3IPn (ORCPT ); Wed, 30 Mar 2016 04:15:43 -0400 Received: by mail-pa0-f42.google.com with SMTP id td3so34287433pab.2 for ; Wed, 30 Mar 2016 01:15:42 -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 :in-reply-to:references; bh=+Ov6ZH2JT6AjOpJN/8rKt9RqQODkMTa+jdoyWwyIrT8=; b=DpNLCAi0vCDNCI1i7Kvu+ilnAkeI+rf1aG816EWHDRMJ4vG4htXaFHbSX8FekXVKea 6tTnqtrjLVnXRvGrl0KXMLUb65FRy1rbxqoIrifKhxNLzRTz92CgE7hUh36sny92vcrj WauF+arMkBMieHH92tg7TyxI4GuSzVkbaf3ds= 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:in-reply-to:references; bh=+Ov6ZH2JT6AjOpJN/8rKt9RqQODkMTa+jdoyWwyIrT8=; b=IDKWkhN14y7fY1DBeNZR73Y/rUzDY5F1IVCIi2x9CPxcfRFi6PJZvR6rRUsC159CwE vniSYA9vSJZZh+4gcrg03AyRnxOyDu3gLbkS/1aNmVBdKbJGutsflW8nnEW5r+WznT9g tW+Bp3PdAUEqEPM/Ic51InUn6jRPbm31mRV0uXsM3qOGfBCHuwbgmXKBmUcrtxyBF4a1 qZzMtPUMdUDVaCGaElULQAxxw4kcx2e/0cWbLFdrgV1u9YN6+QlEeTI7nUWBEMhTMUoc xRiCa7bP1zSzeu8BzWIQmqmF9ntRhjvOYH9CbYCEBmgU/opOrqac32MQGZJWUV+RM4WT 34uQ== X-Gm-Message-State: AD7BkJLihItSaIlh1ej0R8H+ycPVdskcUeGyIIXHkzX9ht1XUqkiM3NJF2GnAA2b/kc3q9gI X-Received: by 10.66.102.70 with SMTP id fm6mr10756261pab.98.1459325742167; Wed, 30 Mar 2016 01:15:42 -0700 (PDT) Received: from localhost ([122.172.81.221]) by smtp.gmail.com with ESMTPSA id l11sm3679431pfb.56.2016.03.30.01.15.41 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 30 Mar 2016 01:15:41 -0700 (PDT) From: Viresh Kumar To: Rafael Wysocki , arnd.bergmann@linaro.org, Viresh Kumar Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, kgene.kim@samsung.com, xf@rock-chips.com, heiko@sntech.de, mmcclint@codeaurora.org, k.kozlowski@samsung.com, linux-kernel@vger.kernel.org Subject: [PATCH V3 2/4] cpufreq: dt: Add generic platform-device creation support Date: Wed, 30 Mar 2016 13:45:26 +0530 Message-Id: <9de0943d865948c7cffae4be3c6cfc8e5b2743ca.1459325515.git.viresh.kumar@linaro.org> X-Mailer: git-send-email 2.7.1.410.g6faf27b In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Multiple platforms are using the generic cpufreq-dt driver now, and all of them are required to create a platform device with name "cpufreq-dt", in order to get the cpufreq-dt probed. Many of them do it from platform code, others have special drivers just to do that. It would be more sensible to do this at a generic place, where all such platform can mark their entries. This patch adds a separate file to get this device created. Currently the compat list of platforms that we support is empty, and will be filled in as and when we move platforms to use it. It always compiles as part of the kernel and so doesn't need a module-exit operation. Signed-off-by: Viresh Kumar Reviewed-by: Krzysztof Kozlowski --- drivers/cpufreq/Kconfig | 10 ++++++++++ drivers/cpufreq/Makefile | 1 + drivers/cpufreq/cpufreq-dt-platdev.c | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 43 insertions(+) create mode 100644 drivers/cpufreq/cpufreq-dt-platdev.c -- 2.7.1.410.g6faf27b diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index a7f45853c103..8c26e3c53498 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -191,6 +191,7 @@ config CPUFREQ_DT depends on HAVE_CLK && OF # if CPU_THERMAL is on and THERMAL=m, CPUFREQ_DT cannot be =y: depends on !CPU_THERMAL || THERMAL + select CPUFREQ_DT_PLATDEV select PM_OPP help This adds a generic DT based cpufreq driver for frequency management. @@ -199,6 +200,15 @@ config CPUFREQ_DT If in doubt, say N. +config CPUFREQ_DT_PLATDEV + bool + help + This adds a generic DT based cpufreq platdev driver for frequency + management. This creates a 'cpufreq-dt' platform device, on the + supported platforms. + + If in doubt, say N. + if X86 source "drivers/cpufreq/Kconfig.x86" endif diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 9e63fb1b09f8..b9224fdb8322 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o obj-$(CONFIG_CPU_FREQ_GOV_COMMON) += cpufreq_governor.o obj-$(CONFIG_CPUFREQ_DT) += cpufreq-dt.o +obj-$(CONFIG_CPUFREQ_DT_PLATDEV) += cpufreq-dt-platdev.o ################################################################################## # x86 drivers. diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c new file mode 100644 index 000000000000..2a3532427ecf --- /dev/null +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2016 Linaro. + * Viresh Kumar + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include + +static const struct of_device_id machines[] = { +}; + +static int __init cpufreq_dt_platdev_init(void) +{ + struct device_node *np = of_find_node_by_path("/"); + + if (!np) + return -ENODEV; + + if (!of_match_node(machines, np)) + return -ENODEV; + + of_node_put(of_root); + + return PTR_ERR_OR_ZERO(platform_device_register_simple("cpufreq-dt", -1, + NULL, 0)); +} +device_initcall(cpufreq_dt_platdev_init);