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[ARM] pxa: fix clock lookup to find specific device clocks 

Ensure that the clock lookup always finds an entry for a specific
device and ID before it falls back to finding just by ID.  This
fixes a problem reported by Holger Schurig where the BTUART was
assigned the wrong clock.

Tested-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2008-02-17 10:35:15 +00:00 committed by Russell King
parent 1309d4e684
commit a0dd005d1d
1 changed files with 16 additions and 7 deletions
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21
arch/arm/mach-pxa/clock.c
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@ -23,18 +23,27 @@ static LIST_HEAD(clocks);
static DEFINE_MUTEX(clocks_mutex); static DEFINE_MUTEX(clocks_mutex);
static DEFINE_SPINLOCK(clocks_lock); static DEFINE_SPINLOCK(clocks_lock);
static struct clk *clk_lookup(struct device *dev, const char *id)
{
struct clk *p;
list_for_each_entry(p, &clocks, node)
if (strcmp(id, p->name) == 0 && p->dev == dev)
return p;
return NULL;
}
struct clk *clk_get(struct device *dev, const char *id) struct clk *clk_get(struct device *dev, const char *id)
{ {
struct clk *p, *clk = ERR_PTR(-ENOENT); struct clk *p, *clk = ERR_PTR(-ENOENT);
mutex_lock(&clocks_mutex); mutex_lock(&clocks_mutex);
list_for_each_entry(p, &clocks, node) { p = clk_lookup(dev, id);
if (strcmp(id, p->name) == 0 && if (!p)
(p->dev == NULL || p->dev == dev)) { p = clk_lookup(NULL, id);
if (p)
clk = p; clk = p;
break;
}
}
mutex_unlock(&clocks_mutex); mutex_unlock(&clocks_mutex);
return clk; return clk;