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path: root/drivers/clk/tegra/clk-pll.c
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Diffstat (limited to 'drivers/clk/tegra/clk-pll.c')
-rw-r--r--drivers/clk/tegra/clk-pll.c91
1 files changed, 50 insertions, 41 deletions
diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index c645a89..b8b3fc6 100644
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -435,6 +435,7 @@ static int _get_table_rate(struct clk_hw *hw,
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
struct tegra_clk_pll_freq_table *sel;
+ int p;
for (sel = pll->params->freq_table; sel->input_rate != 0; sel++)
if (sel->input_rate == parent_rate &&
@@ -444,11 +445,19 @@ static int _get_table_rate(struct clk_hw *hw,
if (sel->input_rate == 0)
return -EINVAL;
+ if (pll->params->pdiv_tohw) {
+ p = _p_div_to_hw(hw, sel->p);
+ if (p < 0)
+ return p;
+ } else {
+ p = ilog2(sel->p);
+ }
+
cfg->input_rate = sel->input_rate;
cfg->output_rate = sel->output_rate;
cfg->m = sel->m;
cfg->n = sel->n;
- cfg->p = sel->p;
+ cfg->p = p;
cfg->cpcon = sel->cpcon;
cfg->sdm_data = sel->sdm_data;
@@ -908,10 +917,6 @@ const struct clk_ops tegra_clk_plle_ops = {
.enable = clk_plle_enable,
};
-#if defined(CONFIG_ARCH_TEGRA_114_SOC) || \
- defined(CONFIG_ARCH_TEGRA_124_SOC) || \
- defined(CONFIG_ARCH_TEGRA_132_SOC)
-
static int _pll_fixed_mdiv(struct tegra_clk_pll_params *pll_params,
unsigned long parent_rate)
{
@@ -930,6 +935,39 @@ static int _pll_fixed_mdiv(struct tegra_clk_pll_params *pll_params,
return 1;
}
+static int _calc_dynamic_ramp_rate(struct clk_hw *hw,
+ struct tegra_clk_pll_freq_table *cfg,
+ unsigned long rate, unsigned long parent_rate)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ unsigned int p;
+ int p_div;
+
+ if (!rate)
+ return -EINVAL;
+
+ p = DIV_ROUND_UP(pll->params->vco_min, rate);
+ cfg->m = _pll_fixed_mdiv(pll->params, parent_rate);
+ cfg->output_rate = rate * p;
+ cfg->n = cfg->output_rate * cfg->m / parent_rate;
+ cfg->input_rate = parent_rate;
+
+ p_div = _p_div_to_hw(hw, p);
+ if (p_div < 0)
+ return p_div;
+
+ cfg->p = p_div;
+
+ if (cfg->n > divn_max(pll) || cfg->output_rate > pll->params->vco_max)
+ return -EINVAL;
+
+ return 0;
+}
+
+#if defined(CONFIG_ARCH_TEGRA_114_SOC) || \
+ defined(CONFIG_ARCH_TEGRA_124_SOC) || \
+ defined(CONFIG_ARCH_TEGRA_132_SOC)
+
u16 tegra_pll_get_fixed_mdiv(struct clk_hw *hw, unsigned long input_rate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
@@ -979,40 +1017,12 @@ static int _setup_dynamic_ramp(struct tegra_clk_pll_params *pll_params,
return 0;
}
-static int _calc_dynamic_ramp_rate(struct clk_hw *hw,
- struct tegra_clk_pll_freq_table *cfg,
- unsigned long rate, unsigned long parent_rate)
-{
- struct tegra_clk_pll *pll = to_clk_pll(hw);
- unsigned int p;
- int p_div;
-
- if (!rate)
- return -EINVAL;
-
- p = DIV_ROUND_UP(pll->params->vco_min, rate);
- cfg->m = _pll_fixed_mdiv(pll->params, parent_rate);
- cfg->output_rate = rate * p;
- cfg->n = cfg->output_rate * cfg->m / parent_rate;
-
- p_div = _p_div_to_hw(hw, p);
- if (p_div < 0)
- return p_div;
-
- cfg->p = p_div;
-
- if (cfg->n > divn_max(pll) || cfg->output_rate > pll->params->vco_max)
- return -EINVAL;
-
- return 0;
-}
-
static int _pll_ramp_calc_pll(struct clk_hw *hw,
struct tegra_clk_pll_freq_table *cfg,
unsigned long rate, unsigned long parent_rate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
- int err = 0, p_div;
+ int err = 0;
err = _get_table_rate(hw, cfg, rate, parent_rate);
if (err < 0)
@@ -1023,11 +1033,6 @@ static int _pll_ramp_calc_pll(struct clk_hw *hw,
err = -EINVAL;
goto out;
}
- p_div = _p_div_to_hw(hw, cfg->p);
- if (p_div < 0)
- return p_div;
- else
- cfg->p = p_div;
}
if (cfg->p > pll->params->max_p)
@@ -1512,8 +1517,12 @@ static struct clk *_tegra_clk_register_pll(struct tegra_clk_pll *pll,
init.num_parents = (parent_name ? 1 : 0);
/* Default to _calc_rate if unspecified */
- if (!pll->params->calc_rate)
- pll->params->calc_rate = _calc_rate;
+ if (!pll->params->calc_rate) {
+ if (pll->params->flags & TEGRA_PLLM)
+ pll->params->calc_rate = _calc_dynamic_ramp_rate;
+ else
+ pll->params->calc_rate = _calc_rate;
+ }
/* Data in .init is copied by clk_register(), so stack variable OK */
pll->hw.init = &init;