From mboxrd@z Thu Jan 1 00:00:00 1970 From: sudeep.holla@arm.com (Sudeep Holla) Date: Thu, 14 May 2015 16:42:34 +0100 Subject: [PATCH v2 4/5] clk: scpi: add support for cpufreq virtual device In-Reply-To: <1431618155-3132-1-git-send-email-sudeep.holla@arm.com> References: <1431618155-3132-1-git-send-email-sudeep.holla@arm.com> Message-ID: <1431618155-3132-5-git-send-email-sudeep.holla@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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 Cc: Mike Turquette Cc: Stephen Boyd Cc: Liviu Dudau Cc: Lorenzo Pieralisi Cc: Jon Medhurst (Tixy) Cc: linux-clk at vger.kernel.org --- drivers/clk/clk-scpi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/clk/clk-scpi.c b/drivers/clk/clk-scpi.c index 208f68d14214..092b4231b1de 100644 --- a/drivers/clk/clk-scpi.c +++ b/drivers/clk/clk-scpi.c @@ -37,6 +37,7 @@ struct scpi_clk { #define to_scpi_clk(clk) container_of(clk, struct scpi_clk, hw) static struct scpi_ops *scpi_ops; +static struct platform_device *cpufreq_dev; static unsigned long scpi_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) @@ -247,6 +248,11 @@ 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); scpi_ops = NULL; @@ -270,6 +276,12 @@ 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