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Merge branch 'clk-at91' into clk-next 

* clk-at91:
  clk: at91: programmable: remove unneeded register read
  clk: at91: optimize clk_round_rate() for AUDIO_PLL
  clk: at91: enable AUDIOPLL as source for PCKx on SAMA5D2
This commit is contained in:
Stephen Boyd 2019-03-08 10:29:47 -08:00
parent efb1e0b071 97d010dc42
commit bd5e2ea291
3 changed files with 10 additions and 5 deletions
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9
drivers/clk/at91/clk-audio-pll.c
View File

@ -340,7 +340,12 @@ static long clk_audio_pll_pmc_round_rate(struct clk_hw *hw, unsigned long rate,
pr_debug("A PLL/PMC: %s, rate = %lu (parent_rate = %lu)\n", __func__,
rate, *parent_rate);
for (div = 1; div <= AUDIO_PLL_QDPMC_MAX; div++) {
if (!rate)
return 0;
best_parent_rate = clk_round_rate(pclk->clk, 1);
div = max(best_parent_rate / rate, 1UL);
for (; div <= AUDIO_PLL_QDPMC_MAX; div++) {
best_parent_rate = clk_round_rate(pclk->clk, rate * div);
tmp_rate = best_parent_rate / div;
tmp_diff = abs(rate - tmp_rate);
@ -350,6 +355,8 @@ static long clk_audio_pll_pmc_round_rate(struct clk_hw *hw, unsigned long rate,
best_rate = tmp_rate;
best_diff = tmp_diff;
tmp_qd = div;
if (!best_diff)
break; /* got exact match */
}
}

3
drivers/clk/at91/clk-programmable.c
View File

@ -132,11 +132,8 @@ static int clk_programmable_set_rate(struct clk_hw *hw, unsigned long rate,
struct clk_programmable *prog = to_clk_programmable(hw);
const struct clk_programmable_layout *layout = prog->layout;
unsigned long div = parent_rate / rate;
unsigned int pckr;
int shift = 0;
regmap_read(prog->regmap, AT91_PMC_PCKR(prog->id), &pckr);
if (!div)
return -EINVAL;

3
drivers/clk/at91/sama5d2.c
View File

@ -241,13 +241,14 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
parent_names[2] = "plladivck";
parent_names[3] = "utmick";
parent_names[4] = "masterck";
parent_names[5] = "audiopll_pmcck";
for (i = 0; i < 3; i++) {
char name[6];
snprintf(name, sizeof(name), "prog%d", i);
hw = at91_clk_register_programmable(regmap, name,
parent_names, 5, i,
parent_names, 6, i,
&at91sam9x5_programmable_layout);
if (IS_ERR(hw))
goto err_free;