diff options
Diffstat (limited to 'drivers/clk/mmp')
| -rw-r--r-- | drivers/clk/mmp/clk-frac.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/clk/mmp/clk-frac.c b/drivers/clk/mmp/clk-frac.c index e29d006ab85e..1876d2c94bd3 100644 --- a/drivers/clk/mmp/clk-frac.c +++ b/drivers/clk/mmp/clk-frac.c @@ -118,10 +118,50 @@ static int clk_factor_set_rate(struct clk_hw *hw, unsigned long drate, return 0; } +void clk_factor_init(struct clk_hw *hw) +{ + struct mmp_clk_factor *factor = to_clk_factor(hw); + struct mmp_clk_factor_masks *masks = factor->masks; + u32 val, num, den; + int i; + unsigned long flags = 0; + + if (factor->lock) + spin_lock_irqsave(factor->lock, flags); + + val = readl(factor->base); + + /* calculate numerator */ + num = (val >> masks->num_shift) & masks->num_mask; + + /* calculate denominator */ + den = (val >> masks->den_shift) & masks->den_mask; + + for (i = 0; i < factor->ftbl_cnt; i++) + if (den == factor->ftbl[i].den && num == factor->ftbl[i].num) + break; + + if (i >= factor->ftbl_cnt) { + val &= ~(masks->num_mask << masks->num_shift); + val |= (factor->ftbl[0].num & masks->num_mask) << + masks->num_shift; + + val &= ~(masks->den_mask << masks->den_shift); + val |= (factor->ftbl[0].den & masks->den_mask) << + masks->den_shift; + + writel(val, factor->base); + } + + if (factor->lock) + spin_unlock_irqrestore(factor->lock, flags); +} + static struct clk_ops clk_factor_ops = { .recalc_rate = clk_factor_recalc_rate, .round_rate = clk_factor_round_rate, .set_rate = clk_factor_set_rate, + .init = clk_factor_init, }; struct clk *mmp_clk_register_factor(const char *name, const char *parent_name, |