diff options
Diffstat (limited to 'drivers/sh/clk/core.c')
| -rw-r--r-- | drivers/sh/clk/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/sh/clk/core.c b/drivers/sh/clk/core.c index 6bf973bd9654..92863e3818e5 100644 --- a/drivers/sh/clk/core.c +++ b/drivers/sh/clk/core.c @@ -469,6 +469,9 @@ void clk_enable_init_clocks(void) unsigned long clk_get_rate(struct clk *clk) { + if (!clk) + return 0; + return clk->rate; } EXPORT_SYMBOL_GPL(clk_get_rate); @@ -478,6 +481,9 @@ int clk_set_rate(struct clk *clk, unsigned long rate) int ret = -EOPNOTSUPP; unsigned long flags; + if (!clk) + return 0; + spin_lock_irqsave(&clock_lock, flags); if (likely(clk->ops && clk->ops->set_rate)) { @@ -535,12 +541,18 @@ EXPORT_SYMBOL_GPL(clk_set_parent); struct clk *clk_get_parent(struct clk *clk) { + if (!clk) + return NULL; + return clk->parent; } EXPORT_SYMBOL_GPL(clk_get_parent); long clk_round_rate(struct clk *clk, unsigned long rate) { + if (!clk) + return 0; + if (likely(clk->ops && clk->ops->round_rate)) { unsigned long flags, rounded; |