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Davinci: configurable pll divider mask 

This patch allows socs to override the divider ratio mask by setting an
optional field (div_ratio_mask) in the pll_data structure.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Tested-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Cyril Chemparathy 2010-04-14 14:44:49 -04:00 committed by Kevin Hilman
parent ce100669d2
commit d6961e6889
2 changed files with 7 additions and 3 deletions
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9
arch/arm/mach-davinci/clock.c
View File

@ -279,7 +279,7 @@ static unsigned long clk_sysclk_recalc(struct clk *clk)
v = __raw_readl(pll->base + clk->div_reg);
if (v & PLLDIV_EN) {
plldiv = (v & PLLDIV_RATIO_MASK) + 1;
plldiv = (v & pll->div_ratio_mask) + 1;
if (plldiv)
rate /= plldiv;
}
@ -319,7 +319,7 @@ static unsigned long clk_pllclk_recalc(struct clk *clk)
if (pll->flags & PLL_HAS_PREDIV) {
prediv = __raw_readl(pll->base + PREDIV);
if (prediv & PLLDIV_EN)
prediv = (prediv & PLLDIV_RATIO_MASK) + 1;
prediv = (prediv & pll->div_ratio_mask) + 1;
else
prediv = 1;
}
@ -331,7 +331,7 @@ static unsigned long clk_pllclk_recalc(struct clk *clk)
if (pll->flags & PLL_HAS_POSTDIV) {
postdiv = __raw_readl(pll->base + POSTDIV);
if (postdiv & PLLDIV_EN)
postdiv = (postdiv & PLLDIV_RATIO_MASK) + 1;
postdiv = (postdiv & pll->div_ratio_mask) + 1;
else
postdiv = 1;
}
@ -458,6 +458,9 @@ int __init davinci_clk_init(struct clk_lookup *clocks)
clk->recalc = clk_leafclk_recalc;
}
if (clk->pll_data && !clk->pll_data->div_ratio_mask)
clk->pll_data->div_ratio_mask = PLLDIV_RATIO_MASK;
if (clk->recalc)
clk->rate = clk->recalc(clk);

1
arch/arm/mach-davinci/clock.h
View File

@ -76,6 +76,7 @@ struct pll_data {
u32 num;
u32 flags;
u32 input_rate;
u32 div_ratio_mask;
};
#define PLL_HAS_PREDIV 0x01
#define PLL_HAS_POSTDIV 0x02