From 9490f01e247169a93262054074409ad73d71c4da Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Mon, 30 Mar 2015 10:59:52 +0100 Subject: [PATCH] clk: scpi: add support for cpufreq virtual device 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 72f0486b5de6..0b501a9fef92 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; }