diff options
Diffstat (limited to 'drivers/clk/microchip/clk-core.c')
| -rw-r--r-- | drivers/clk/microchip/clk-core.c | 55 |
1 files changed, 29 insertions, 26 deletions
diff --git a/drivers/clk/microchip/clk-core.c b/drivers/clk/microchip/clk-core.c index 6fbc6dc50ca3..b34348d491f3 100644 --- a/drivers/clk/microchip/clk-core.c +++ b/drivers/clk/microchip/clk-core.c @@ -155,11 +155,13 @@ static unsigned long pbclk_recalc_rate(struct clk_hw *hw, return parent_rate / pbclk_read_pbdiv(pb); } -static long pbclk_round_rate(struct clk_hw *hw, unsigned long rate, - unsigned long *parent_rate) +static int pbclk_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) { - return calc_best_divided_rate(rate, *parent_rate, - PB_DIV_MAX, PB_DIV_MIN); + req->rate = calc_best_divided_rate(req->rate, req->best_parent_rate, + PB_DIV_MAX, PB_DIV_MIN); + + return 0; } static int pbclk_set_rate(struct clk_hw *hw, unsigned long rate, @@ -207,7 +209,7 @@ const struct clk_ops pic32_pbclk_ops = { .disable = pbclk_disable, .is_enabled = pbclk_is_enabled, .recalc_rate = pbclk_recalc_rate, - .round_rate = pbclk_round_rate, + .determine_rate = pbclk_determine_rate, .set_rate = pbclk_set_rate, }; @@ -372,18 +374,6 @@ static unsigned long roclk_recalc_rate(struct clk_hw *hw, return roclk_calc_rate(parent_rate, rodiv, rotrim); } -static long roclk_round_rate(struct clk_hw *hw, unsigned long rate, - unsigned long *parent_rate) -{ - u32 rotrim, rodiv; - - /* calculate dividers for new rate */ - roclk_calc_div_trim(rate, *parent_rate, &rodiv, &rotrim); - - /* caclulate new rate (rounding) based on new rodiv & rotrim */ - return roclk_calc_rate(*parent_rate, rodiv, rotrim); -} - static int roclk_determine_rate(struct clk_hw *hw, struct clk_rate_request *req) { @@ -394,6 +384,8 @@ static int roclk_determine_rate(struct clk_hw *hw, /* find a parent which can generate nearest clkrate >= rate */ for (i = 0; i < clk_hw_get_num_parents(hw); i++) { + u32 rotrim, rodiv; + /* get parent */ parent_clk = clk_hw_get_parent_by_index(hw, i); if (!parent_clk) @@ -404,7 +396,12 @@ static int roclk_determine_rate(struct clk_hw *hw, if (req->rate > parent_rate) continue; - nearest_rate = roclk_round_rate(hw, req->rate, &parent_rate); + /* calculate dividers for new rate */ + roclk_calc_div_trim(req->rate, req->best_parent_rate, &rodiv, &rotrim); + + /* caclulate new rate (rounding) based on new rodiv & rotrim */ + nearest_rate = roclk_calc_rate(req->best_parent_rate, rodiv, rotrim); + delta = abs(nearest_rate - req->rate); if ((nearest_rate >= req->rate) && (delta < best_delta)) { best_parent_clk = parent_clk; @@ -665,12 +662,15 @@ static unsigned long spll_clk_recalc_rate(struct clk_hw *hw, return rate64; } -static long spll_clk_round_rate(struct clk_hw *hw, unsigned long rate, - unsigned long *parent_rate) +static int spll_clk_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) { struct pic32_sys_pll *pll = clkhw_to_spll(hw); - return spll_calc_mult_div(pll, rate, *parent_rate, NULL, NULL); + req->rate = spll_calc_mult_div(pll, req->rate, req->best_parent_rate, + NULL, NULL); + + return 0; } static int spll_clk_set_rate(struct clk_hw *hw, unsigned long rate, @@ -725,7 +725,7 @@ static int spll_clk_set_rate(struct clk_hw *hw, unsigned long rate, /* SPLL clock operation */ const struct clk_ops pic32_spll_ops = { .recalc_rate = spll_clk_recalc_rate, - .round_rate = spll_clk_round_rate, + .determine_rate = spll_clk_determine_rate, .set_rate = spll_clk_set_rate, }; @@ -780,10 +780,13 @@ static unsigned long sclk_get_rate(struct clk_hw *hw, unsigned long parent_rate) return parent_rate / div; } -static long sclk_round_rate(struct clk_hw *hw, unsigned long rate, - unsigned long *parent_rate) +static int sclk_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) { - return calc_best_divided_rate(rate, *parent_rate, SLEW_SYSDIV, 1); + req->rate = calc_best_divided_rate(req->rate, req->best_parent_rate, + SLEW_SYSDIV, 1); + + return 0; } static int sclk_set_rate(struct clk_hw *hw, @@ -909,7 +912,7 @@ static int sclk_init(struct clk_hw *hw) const struct clk_ops pic32_sclk_ops = { .get_parent = sclk_get_parent, .set_parent = sclk_set_parent, - .round_rate = sclk_round_rate, + .determine_rate = sclk_determine_rate, .set_rate = sclk_set_rate, .recalc_rate = sclk_get_rate, .init = sclk_init, |