• Sudeep Holla's avatar
    cpufreq: st: enable selective initialization based on the platform · 2482bc31
    Sudeep Holla authored
    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.
    
    Fixes: ab0ea257 (cpufreq: st: Provide runtime initialised driver for ST's platforms)
    Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
    Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
    Acked-by: default avatarLee Jones <lee.jones@linaro.org>
    Cc: 4.5+ <stable@vger.kernel.org> # 4.5+
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    2482bc31
sti-cpufreq.c 7.01 KB