From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sudeep Holla Subject: [PATCH v4 4/8] clk: scpi: add support for cpufreq virtual device Date: Mon, 8 Jun 2015 11:39:58 +0100 Message-ID: <1433760002-24120-5-git-send-email-sudeep.holla@arm.com> References: <1433760002-24120-1-git-send-email-sudeep.holla@arm.com> Return-path: Received: from foss.arm.com ([217.140.101.70]:48090 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752613AbbFHKk2 (ORCPT ); Mon, 8 Jun 2015 06:40:28 -0400 In-Reply-To: <1433760002-24120-1-git-send-email-sudeep.holla@arm.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Sudeep Holla , Liviu Dudau , Lorenzo Pieralisi , "Jon Medhurst (Tixy)" , Arnd Bergmann , Kevin Hilman , Olof Johansson , Stephen Boyd , Mike Turquette 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: 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 707b3430c55f..2e056ac19c54 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) { @@ -238,6 +240,11 @@ 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; @@ -263,6 +270,12 @@ 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