diff options
| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2021-05-17 22:37:24 +0200 |
|---|---|---|
| committer | Jerome Brunet <jbrunet@baylibre.com> | 2021-05-19 15:48:12 +0200 |
| commit | 4cbf0cd6bf4c704746b6a6c6d42a8ee327070005 (patch) | |
| tree | f9b93227d67f67f8f922bda641f8514cc224fe1e /drivers/clk/meson | |
| parent | 6efb943b8616ec53a5e444193dccf1af9ad627b5 (diff) | |
clk: meson: pll: switch to determine_rate for the PLL ops
This increases the maxmium supported frequency on 32-bit systems from
2^31 (signed long as used by clk_ops.round_rate, maximum value:
approx. 2.14GHz) to 2^32 (unsigned long as used by
clk_ops.determine_rate, maximum value: approx. 4.29GHz).
On Meson8/8b/8m2 the HDMI PLL and it's OD (post-dividers) are
capable of running at up to 2.97GHz. So switch the divider
implementation in clk-regmap to clk_ops.determine_rate to support these
higher frequencies on 32-bit systems.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20210517203724.1006254-4-martin.blumenstingl@googlemail.com
Diffstat (limited to 'drivers/clk/meson')
| -rw-r--r-- | drivers/clk/meson/clk-pll.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/clk/meson/clk-pll.c b/drivers/clk/meson/clk-pll.c index 49f27fe53213..9e55617bc3b4 100644 --- a/drivers/clk/meson/clk-pll.c +++ b/drivers/clk/meson/clk-pll.c @@ -242,8 +242,8 @@ static int meson_clk_get_pll_settings(unsigned long rate, return best ? 0 : -EINVAL; } -static long meson_clk_pll_round_rate(struct clk_hw *hw, unsigned long rate, - unsigned long *parent_rate) +static int meson_clk_pll_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) { struct clk_regmap *clk = to_clk_regmap(hw); struct meson_clk_pll_data *pll = meson_clk_pll_data(clk); @@ -251,22 +251,26 @@ static long meson_clk_pll_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long round; int ret; - ret = meson_clk_get_pll_settings(rate, *parent_rate, &m, &n, pll); + ret = meson_clk_get_pll_settings(req->rate, req->best_parent_rate, + &m, &n, pll); if (ret) - return meson_clk_pll_recalc_rate(hw, *parent_rate); + return ret; - round = __pll_params_to_rate(*parent_rate, m, n, 0, pll); + round = __pll_params_to_rate(req->best_parent_rate, m, n, 0, pll); - if (!MESON_PARM_APPLICABLE(&pll->frac) || rate == round) - return round; + if (!MESON_PARM_APPLICABLE(&pll->frac) || req->rate == round) { + req->rate = round; + return 0; + } /* * The rate provided by the setting is not an exact match, let's * try to improve the result using the fractional parameter */ - frac = __pll_params_with_frac(rate, *parent_rate, m, n, pll); + frac = __pll_params_with_frac(req->rate, req->best_parent_rate, m, n, pll); + req->rate = __pll_params_to_rate(req->best_parent_rate, m, n, frac, pll); - return __pll_params_to_rate(*parent_rate, m, n, frac, pll); + return 0; } static int meson_clk_pll_wait_lock(struct clk_hw *hw) @@ -419,7 +423,7 @@ static int meson_clk_pll_set_rate(struct clk_hw *hw, unsigned long rate, */ const struct clk_ops meson_clk_pcie_pll_ops = { .recalc_rate = meson_clk_pll_recalc_rate, - .round_rate = meson_clk_pll_round_rate, + .determine_rate = meson_clk_pll_determine_rate, .is_enabled = meson_clk_pll_is_enabled, .enable = meson_clk_pcie_pll_enable, .disable = meson_clk_pll_disable @@ -429,7 +433,7 @@ EXPORT_SYMBOL_GPL(meson_clk_pcie_pll_ops); const struct clk_ops meson_clk_pll_ops = { .init = meson_clk_pll_init, .recalc_rate = meson_clk_pll_recalc_rate, - .round_rate = meson_clk_pll_round_rate, + .determine_rate = meson_clk_pll_determine_rate, .set_rate = meson_clk_pll_set_rate, .is_enabled = meson_clk_pll_is_enabled, .enable = meson_clk_pll_enable, |