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OMAP2+: clock: reduce the amount of standard debugging while disabling unused clocks 

Reduce the amount of debugging generated by default when unused clocks
are being disabled by the clock code.  The previous code would only
generate debug-level messages, but some people who wished to run
production kernels with debug-level messages enabled reported that the
large number of clock disable messages were slowing boot.  Now to
enable clock-by-clock disable messages, DEBUG needs to be defined in
mach-omap2/clock.c.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Tuukka Tikkanen <tuukka.tikkanen@nokia.com>
Cc: Tim Bird <tim.bird@am.sony.com>
This commit is contained in:
Paul Walmsley 2010-10-08 11:40:20 -06:00
parent 4814ced511
commit 6041c27f51
2 changed files with 4 additions and 3 deletions
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2
arch/arm/mach-omap2/clock.c
View File

@ -395,7 +395,7 @@ void omap2_clk_disable_unused(struct clk *clk)
if ((regval32 & (1 << clk->enable_bit)) == v)
return;
printk(KERN_DEBUG "Disabling unused clock \"%s\"\n", clk->name);
pr_debug("Disabling unused clock \"%s\"\n", clk->name);
if (cpu_is_omap34xx()) {
omap2_clk_enable(clk);
omap2_clk_disable(clk);

5
arch/arm/plat-omap/clock.c
View File

@ -60,7 +60,7 @@ void clk_disable(struct clk *clk)
spin_lock_irqsave(&clockfw_lock, flags);
if (clk->usecount == 0) {
printk(KERN_ERR "Trying disable clock %s with 0 usecount\n",
pr_err("Trying disable clock %s with 0 usecount\n",
clk->name);
WARN_ON(1);
goto out;
@ -397,6 +397,7 @@ static int __init clk_disable_unused(void)
struct clk *ck;
unsigned long flags;
pr_info("clock: disabling unused clocks to save power\n");
list_for_each_entry(ck, &clocks, node) {
if (ck->ops == &clkops_null)
continue;
@ -418,7 +419,7 @@ late_initcall(clk_disable_unused);
int __init clk_init(struct clk_functions * custom_clocks)
{
if (!custom_clocks) {
printk(KERN_ERR "No custom clock functions registered\n");
pr_err("No custom clock functions registered\n");
BUG();
}