From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754097AbbIPRTi (ORCPT ); Wed, 16 Sep 2015 13:19:38 -0400 Received: from foss.arm.com ([217.140.101.70]:37706 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753584AbbIPRR3 (ORCPT ); Wed, 16 Sep 2015 13:17:29 -0400 From: Sudeep Holla To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, arm@kernel.org Cc: Sudeep Holla , Liviu Dudau , Punit Agrawal , "Jon Medhurst (Tixy)" , Lorenzo Pieralisi , Arnd Bergmann , Olof Johansson , Kevin Hilman , Mike Turquette , Liviu Dudau , linux-clk@vger.kernel.org Subject: [PATCH REPOST v6 4/8] clk: scpi: add support for cpufreq virtual device Date: Wed, 16 Sep 2015 18:16:35 +0100 Message-Id: <1442423799-23892-5-git-send-email-sudeep.holla@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1442423799-23892-1-git-send-email-sudeep.holla@arm.com> References: <1442423799-23892-1-git-send-email-sudeep.holla@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The clocks for the CPUs are provided by SCP and are managed by this clock driver. So the cpufreq device needs to be added only after the clock get registered and removed when this driver is unloaded. This patch manages the cpufreq virtual device based on the clock availability. Signed-off-by: Sudeep Holla Acked-by: Stephen Boyd Cc: Mike Turquette Cc: Liviu Dudau Cc: Lorenzo Pieralisi Cc: Jon Medhurst (Tixy) Cc: linux-clk@vger.kernel.org --- drivers/clk/clk-scpi.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/clk/clk-scpi.c b/drivers/clk/clk-scpi.c index e8323db300e2..a201781287b3 100644 --- a/drivers/clk/clk-scpi.c +++ b/drivers/clk/clk-scpi.c @@ -34,6 +34,8 @@ struct scpi_clk { #define to_scpi_clk(clk) container_of(clk, struct scpi_clk, hw) +static struct platform_device *cpufreq_dev; + static unsigned long scpi_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { @@ -263,6 +265,11 @@ static int scpi_clocks_remove(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *child, *np = dev->of_node; + if (cpufreq_dev) { + platform_device_unregister(cpufreq_dev); + cpufreq_dev = NULL; + } + for_each_available_child_of_node(np, child) of_clk_del_provider(np); return 0; @@ -288,6 +295,12 @@ static int scpi_clocks_probe(struct platform_device *pdev) return ret; } } + /* Add the virtual cpufreq device */ + cpufreq_dev = platform_device_register_simple("scpi-cpufreq", + -1, NULL, 0); + if (!cpufreq_dev) + pr_warn("unable to register cpufreq device"); + return 0; } -- 1.9.1