diff options
Diffstat (limited to 'arch/arm/mach-davinci/clock.c')
| -rw-r--r-- | arch/arm/mach-davinci/clock.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm/mach-davinci/clock.c b/arch/arm/mach-davinci/clock.c index 123839332d5..0fc63f93a22 100644 --- a/arch/arm/mach-davinci/clock.c +++ b/arch/arm/mach-davinci/clock.c @@ -125,9 +125,10 @@ int clk_set_rate(struct clk *clk, unsigned long rate) if (clk == NULL || IS_ERR(clk)) return ret; - spin_lock_irqsave(&clockfw_lock, flags); if (clk->set_rate) ret = clk->set_rate(clk, rate); + + spin_lock_irqsave(&clockfw_lock, flags); if (ret == 0) { if (clk->recalc) clk->rate = clk->recalc(clk); @@ -364,6 +365,7 @@ int davinci_set_pllrate(struct pll_data *pll, unsigned int prediv, { u32 ctrl; unsigned int locktime; + unsigned long flags; if (pll->base == NULL) return -EINVAL; @@ -384,6 +386,9 @@ int davinci_set_pllrate(struct pll_data *pll, unsigned int prediv, if (mult) mult = mult - 1; + /* Protect against simultaneous calls to PLL setting seqeunce */ + spin_lock_irqsave(&clockfw_lock, flags); + ctrl = __raw_readl(pll->base + PLLCTL); /* Switch the PLL to bypass mode */ @@ -416,6 +421,8 @@ int davinci_set_pllrate(struct pll_data *pll, unsigned int prediv, ctrl |= PLLCTL_PLLEN; __raw_writel(ctrl, pll->base + PLLCTL); + spin_unlock_irqrestore(&clockfw_lock, flags); + return 0; } EXPORT_SYMBOL(davinci_set_pllrate); |