diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-02-24 15:55:37 +0100 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2008-03-24 11:47:17 -0700 |
| commit | e08b12e87e90a96df9380e8b17424e939c9f3448 (patch) | |
| tree | 9d586690b295242e28acd1d07bc3c3f4af7520c3 /arch | |
| parent | 512ec490759a432367546adff16877e9dd9e5409 (diff) | |
ARM pxa: fix clock lookup to find specific device clocks
commit: a0dd005d1d9f4c3beab52086f3844ef9342d1e67
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>
Uli Luckas notes:
The patch fixes the otherwise unusable bluetooth uart on pxa25x. The
patch is written by Russell King [1] who also gave his OK for
stable inclusion [2]. The patch is also available as commit
a0dd005d1d9f4c3beab52086f3844ef9342d1e67 to Linus' tree.
[1] http://marc.info/?l=linux-arm-kernel&m=120298366510315
[2] http://marc.info/?l=linux-arm-kernel&m=120384388411097
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-pxa/clock.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/arch/arm/mach-pxa/clock.c b/arch/arm/mach-pxa/clock.c index 83ef5ecaf43..df5ae2710ab 100644 --- a/arch/arm/mach-pxa/clock.c +++ b/arch/arm/mach-pxa/clock.c @@ -23,18 +23,27 @@ static LIST_HEAD(clocks); static DEFINE_MUTEX(clocks_mutex); 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 *p, *clk = ERR_PTR(-ENOENT); mutex_lock(&clocks_mutex); - list_for_each_entry(p, &clocks, node) { - if (strcmp(id, p->name) == 0 && - (p->dev == NULL || p->dev == dev)) { - clk = p; - break; - } - } + p = clk_lookup(dev, id); + if (!p) + p = clk_lookup(NULL, id); + if (p) + clk = p; mutex_unlock(&clocks_mutex); return clk; |