Messages in this thread Patch in this message | | | From | Sudeep Holla <> | Subject | [PATCH] cpufreq: st: enable selective initialization based on the platform | Date | Wed, 27 Apr 2016 12:40:27 +0100 |
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The sti-cpufreq does unconditional registration of the cpufreq-dt driver which causes issue on an multi-platform build. For example, on Vexpress TC2 platform, we get the following error on boot:
cpu cpu0: OPP-v2 not supported cpu cpu0: Not doing voltage scaling cpu: dev_pm_opp_of_cpumask_add_table: couldn't find opp table for cpu:0, -19 cpu cpu0: dev_pm_opp_get_max_volt_latency: Invalid regulator (-6) ... arm_big_little: bL_cpufreq_register: Failed registering platform driver: vexpress-spc, err: -17
The actual driver fails to initialise as cpufreq-dt is probed successfully, which is incorrect. This issue can happen to any platform not using cpufreq-dt in a multi-platform build.
This patch adds a check to do selective initialization of the driver.
Cc: Lee Jones <lee.jones@linaro.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: linux-pm@vger.kernel.org Fixes: ab0ea257fc58 ("cpufreq: st: Provide runtime initialised driver for ST's platforms") Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- drivers/cpufreq/sti-cpufreq.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c index a9c659f58974..5fce58712a97 100644 --- a/drivers/cpufreq/sti-cpufreq.c +++ b/drivers/cpufreq/sti-cpufreq.c @@ -259,6 +259,10 @@ static int sti_cpufreq_init(void) { int ret; + if ((!of_machine_is_compatible("st,stih407-b2120")) && + (!of_machine_is_compatible("st,stih407"))) + return -ENODEV; + ddata.cpu = get_cpu_device(0); if (!ddata.cpu) { dev_err(ddata.cpu, "Failed to get device for CPU0\n"); -- 1.9.1
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