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

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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
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@ -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();
}