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| author | Sudeep Holla <Sudeep.Holla@arm.com> | 2016-04-27 17:18:59 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-04-28 15:25:56 +0200 |
| commit | 2482bc31ca8096241b8fa97610ef23154ce55f45 (patch) | |
| tree | 8f9cc83eadb3dc5bd51ce3ed1279088521ded68c | |
| parent | 1becf03545a0859ceaaf9e8c2d9861882a71cb01 (diff) | |
| download | linux-2482bc31ca8096241b8fa97610ef23154ce55f45.tar.bz2 | |
cpufreq: st: enable selective initialization based on the platform
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: ab0ea257fc58 (cpufreq: st: Provide runtime initialised driver for ST's platforms)
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Cc: 4.5+ <stable@vger.kernel.org> # 4.5+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpufreq/sti-cpufreq.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c index a9c659f58974..04042038ec4b 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")) && + (!of_machine_is_compatible("st,stih410"))) + return -ENODEV; + ddata.cpu = get_cpu_device(0); if (!ddata.cpu) { dev_err(ddata.cpu, "Failed to get device for CPU0\n"); |