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PM / clock_ops: report clock errors from clk_enable() 

If clk_enable() fails, then print a message so that the user can see
what is happening instead of silently failing to enable the clock.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Reviewed-by: Ian Molton <ian.molton@codethink.co.uk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ben Dooks 2014-01-14 12:23:42 +00:00 committed by Rafael J. Wysocki
parent afdd3ab315
commit 5cda3fbb15
1 changed files with 17 additions and 2 deletions
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19
drivers/base/power/clock_ops.c
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@ -32,6 +32,21 @@ struct pm_clock_entry {
enum pce_status status;
};
/**
* pm_clk_enable - Enable a clock, reporting any errors
* @dev: The device for the given clock
* @clk: The clock being enabled.
*/
static inline int __pm_clk_enable(struct device *dev, struct clk *clk)
{
int ret = clk_enable(clk);
if (ret)
dev_err(dev, "%s: failed to enable clk %p, error %d\n",
__func__, clk, ret);
return ret;
}
/**
* pm_clk_acquire - Acquire a device clock.
* @dev: Device whose clock is to be acquired.
@ -263,7 +278,7 @@ int pm_clk_resume(struct device *dev)
list_for_each_entry(ce, &psd->clock_list, node) {
if (ce->status < PCE_STATUS_ERROR) {
ret = clk_enable(ce->clk);
ret = __pm_clk_enable(dev, ce->clk);
if (!ret)
ce->status = PCE_STATUS_ENABLED;
}
@ -381,7 +396,7 @@ int pm_clk_resume(struct device *dev)
spin_lock_irqsave(&psd->lock, flags);
list_for_each_entry(ce, &psd->clock_list, node)
clk_enable(ce->clk);
__pm_clk_enable(dev, ce->clk);
spin_unlock_irqrestore(&psd->lock, flags);