[CPUFREQ] use dynamic debug instead of custom infrastructure

With dynamic debug having gained the capability to report debug messages
also during the boot process, it offers a far superior interface for
debug messages than the custom cpufreq infrastructure. As a first step,
remove the old cpufreq_debug_printk() function and replace it with a call
to the generic pr_debug() function.

How can dynamic debug be used on cpufreq? You need a kernel which has
CONFIG_DYNAMIC_DEBUG enabled.

To enabled debugging during runtime, mount debugfs and

$ echo -n 'module cpufreq +p' > /sys/kernel/debug/dynamic_debug/control

for debugging the complete "cpufreq" module. To achieve the same goal during
boot, append

	ddebug_query="module cpufreq +p"

as a boot parameter to the kernel of your choice.

For more detailled instructions, please see
Documentation/dynamic-debug-howto.txt

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/arch/arm/mach-davinci/cpufreq.c b/arch/arm/mach-davinci/cpufreq.c
index 0a95be1512bb..41669ecc1f91 100644
--- a/arch/arm/mach-davinci/cpufreq.c
+++ b/arch/arm/mach-davinci/cpufreq.c
@@ -94,9 +94,7 @@ static int davinci_target(struct cpufreq_policy *policy,
         if (freqs.old == freqs.new)
                 return ret;
 
-        cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER,
-                        dev_driver_string(cpufreq.dev),
-                        "transition: %u --> %u\n", freqs.old, freqs.new);
+        dev_dbg(&cpufreq.dev, "transition: %u --> %u\n", freqs.old, freqs.new);
 
         ret = cpufreq_frequency_table_target(policy, pdata->freq_table,
                                                 freqs.new, relation, &idx);