diff options
| author | Mark Langsdorf | 2013-01-28 17:13:15 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki | 2013-02-02 00:01:15 +0100 |
| commit | 6754f556103be5bd172263b1075ddbb7157afbad (patch) | |
| tree | cd913973afd0247175e3adeecaf19d484753580a /drivers/cpufreq/cpufreq-cpu0.c | |
| parent | ARM / highbank: add support for pl320 IPC (diff) | |
| download | kernel-qcow2-linux-6754f556103be5bd172263b1075ddbb7157afbad.tar.gz kernel-qcow2-linux-6754f556103be5bd172263b1075ddbb7157afbad.tar.xz kernel-qcow2-linux-6754f556103be5bd172263b1075ddbb7157afbad.zip | |
cpufreq / highbank: add support for highbank cpufreq
Highbank processors depend on the external ECME to perform voltage
management based on a requested frequency. Communication between the
A9 cores and the ECME happens over the pl320 IPC channel.
Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq-cpu0.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq-cpu0.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c index debc5a7c8db6..38ae178ce4ef 100644 --- a/drivers/cpufreq/cpufreq-cpu0.c +++ b/drivers/cpufreq/cpufreq-cpu0.c @@ -182,7 +182,11 @@ static int cpu0_cpufreq_driver_init(void) struct device_node *np; int ret; - np = of_find_node_by_path("/cpus/cpu@0"); + for_each_child_of_node(of_find_node_by_path("/cpus"), np) { + if (of_get_property(np, "operating-points", NULL)) + break; + } + if (!np) { pr_err("failed to find cpu0 node\n"); return -ENOENT; |