diff options
| author | Stephen Boyd <sboyd@kernel.org> | 2019-03-08 21:29:47 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2019-03-08 21:29:47 +0300 |
| commit | bd5e2ea291a8b34d2ebfbfeff94d4aafe25d37e4 (patch) | |
| tree | 0ec671e2053aa57a639f41f9e09218cfbc6150c2 /drivers/clk/at91 | |
| parent | efb1e0b07139974b506c90f4e0621d5866ee48b7 (diff) | |
| parent | 97d010dc420469fbdfcf0b335578f19a0b25e17b (diff) | |
| download | linux-bd5e2ea291a8b34d2ebfbfeff94d4aafe25d37e4.tar.xz | |
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
Diffstat (limited to 'drivers/clk/at91')
| -rw-r--r-- | drivers/clk/at91/clk-audio-pll.c | 9 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-programmable.c | 3 | ||||
| -rw-r--r-- | drivers/clk/at91/sama5d2.c | 3 |
3 files changed, 10 insertions, 5 deletions
diff --git a/drivers/clk/at91/clk-audio-pll.c b/drivers/clk/at91/clk-audio-pll.c index 36d77146a3bd..3cc4a82f4e9f 100644 --- a/drivers/clk/at91/clk-audio-pll.c +++ b/drivers/clk/at91/clk-audio-pll.c @@ -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 */ } } diff --git a/drivers/clk/at91/clk-programmable.c b/drivers/clk/at91/clk-programmable.c index 5bc68b9c5498..89d6f3736dbf 100644 --- a/drivers/clk/at91/clk-programmable.c +++ b/drivers/clk/at91/clk-programmable.c @@ -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; diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c index cd0ef7274fdb..1f70cb164b06 100644 --- a/drivers/clk/at91/sama5d2.c +++ b/drivers/clk/at91/sama5d2.c @@ -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; |