1 files changed, 231 insertions, 18 deletions

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index cec0afea8e44..fec6eb376e27 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -63,6 +63,8 @@
 #define PLL_OPMODE(p)		((p)->offset + (p)->regs[PLL_OFF_OPMODE])
 #define PLL_FRAC(p)		((p)->offset + (p)->regs[PLL_OFF_FRAC])
 
+#define GET_PLL_TYPE(pll)	(((pll)->regs - clk_alpha_pll_regs[0]) / PLL_OFF_MAX_REGS)
+
 const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = {
 	[CLK_ALPHA_PLL_TYPE_DEFAULT] =  {
 		[PLL_OFF_L_VAL] = 0x04,
@@ -788,6 +790,29 @@ static int clk_alpha_pll_update_latch(struct clk_alpha_pll *pll,
 	return __clk_alpha_pll_update_latch(pll);
 }
 
+static void clk_alpha_pll_update_configs(struct clk_alpha_pll *pll, const struct pll_vco *vco,
+					 u32 l, u64 alpha, u32 alpha_width, bool alpha_en)
+{
+	regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
+
+	if (alpha_width > ALPHA_BITWIDTH)
+		alpha <<= alpha_width - ALPHA_BITWIDTH;
+
+	if (alpha_width > 32)
+		regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL_U(pll), upper_32_bits(alpha));
+
+	regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), lower_32_bits(alpha));
+
+	if (vco) {
+		regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+				   PLL_VCO_MASK << PLL_VCO_SHIFT,
+				   vco->val << PLL_VCO_SHIFT);
+	}
+
+	if (alpha_en)
+		regmap_set_bits(pll->clkr.regmap, PLL_USER_CTL(pll), PLL_ALPHA_EN);
+}
+
 static int __clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 				    unsigned long prate,
 				    int (*is_enabled)(struct clk_hw *))
@@ -805,24 +830,7 @@ static int __clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 		return -EINVAL;
 	}
 
-	regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
-
-	if (alpha_width > ALPHA_BITWIDTH)
-		a <<= alpha_width - ALPHA_BITWIDTH;
-
-	if (alpha_width > 32)
-		regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL_U(pll), a >> 32);
-
-	regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a);
-
-	if (vco) {
-		regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
-				   PLL_VCO_MASK << PLL_VCO_SHIFT,
-				   vco->val << PLL_VCO_SHIFT);
-	}
-
-	regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
-			   PLL_ALPHA_EN, PLL_ALPHA_EN);
+	clk_alpha_pll_update_configs(pll, vco, l, a, alpha_width, true);
 
 	return clk_alpha_pll_update_latch(pll, is_enabled);
 }
@@ -2960,3 +2968,208 @@ const struct clk_ops clk_alpha_pll_regera_ops = {
 	.set_rate = clk_zonda_pll_set_rate,
 };
 EXPORT_SYMBOL_GPL(clk_alpha_pll_regera_ops);
+
+void qcom_clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap)
+{
+	const struct clk_init_data *init = pll->clkr.hw.init;
+
+	switch (GET_PLL_TYPE(pll)) {
+	case CLK_ALPHA_PLL_TYPE_LUCID_OLE:
+		clk_lucid_ole_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_LUCID_EVO:
+		clk_lucid_evo_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_TAYCAN_ELU:
+		clk_taycan_elu_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_RIVIAN_EVO:
+		clk_rivian_evo_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_TRION:
+		clk_trion_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_HUAYRA_2290:
+		clk_huayra_2290_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_FABIA:
+		clk_fabia_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_AGERA:
+		clk_agera_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_PONGO_ELU:
+		clk_pongo_elu_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_ZONDA:
+	case CLK_ALPHA_PLL_TYPE_ZONDA_OLE:
+		clk_zonda_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_STROMER:
+	case CLK_ALPHA_PLL_TYPE_STROMER_PLUS:
+		clk_stromer_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_DEFAULT:
+	case CLK_ALPHA_PLL_TYPE_DEFAULT_EVO:
+	case CLK_ALPHA_PLL_TYPE_HUAYRA:
+	case CLK_ALPHA_PLL_TYPE_HUAYRA_APSS:
+	case CLK_ALPHA_PLL_TYPE_BRAMMO:
+	case CLK_ALPHA_PLL_TYPE_BRAMMO_EVO:
+		clk_alpha_pll_configure(pll, regmap, pll->config);
+		break;
+	default:
+		WARN(1, "%s: invalid pll type\n", init->name);
+		break;
+	}
+}
+EXPORT_SYMBOL_GPL(qcom_clk_alpha_pll_configure);
+
+static int clk_alpha_pll_slew_update(struct clk_alpha_pll *pll)
+{
+	u32 val;
+	int ret;
+
+	regmap_set_bits(pll->clkr.regmap, PLL_MODE(pll), PLL_UPDATE);
+	regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
+
+	ret = wait_for_pll_update(pll);
+	if (ret)
+		return ret;
+	/*
+	 * Hardware programming mandates a wait of at least 570ns before polling the LOCK
+	 * detect bit. Have a delay of 1us just to be safe.
+	 */
+	udelay(1);
+
+	return wait_for_pll_enable_lock(pll);
+}
+
+static int clk_alpha_pll_slew_set_rate(struct clk_hw *hw, unsigned long rate,
+					unsigned long parent_rate)
+{
+	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+	const struct pll_vco *curr_vco, *vco;
+	unsigned long freq_hz;
+	u64 a;
+	u32 l;
+
+	freq_hz = alpha_pll_round_rate(rate, parent_rate, &l, &a, ALPHA_REG_BITWIDTH);
+	if (freq_hz != rate) {
+		pr_err("alpha_pll: Call clk_set_rate with rounded rates!\n");
+		return -EINVAL;
+	}
+
+	curr_vco = alpha_pll_find_vco(pll, clk_hw_get_rate(hw));
+	if (!curr_vco) {
+		pr_err("alpha pll: not in a valid vco range\n");
+		return -EINVAL;
+	}
+
+	vco = alpha_pll_find_vco(pll, freq_hz);
+	if (!vco) {
+		pr_err("alpha pll: not in a valid vco range\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Dynamic pll update will not support switching frequencies across
+	 * vco ranges. In those cases fall back to normal alpha set rate.
+	 */
+	if (curr_vco->val != vco->val)
+		return clk_alpha_pll_set_rate(hw, rate, parent_rate);
+
+	clk_alpha_pll_update_configs(pll, NULL, l, a, ALPHA_REG_BITWIDTH, false);
+
+	/* Ensure that the write above goes before slewing the PLL */
+	mb();
+
+	if (clk_hw_is_enabled(hw))
+		return clk_alpha_pll_slew_update(pll);
+
+	return 0;
+}
+
+/*
+ * Slewing plls should be bought up at frequency which is in the middle of the
+ * desired VCO range. So after bringing up the pll at calibration freq, set it
+ * back to desired frequency(that was set by previous clk_set_rate).
+ */
+static int clk_alpha_pll_calibrate(struct clk_hw *hw)
+{
+	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+	struct clk_hw *parent;
+	const struct pll_vco *vco;
+	unsigned long calibration_freq, freq_hz;
+	u64 a;
+	u32 l;
+	int rc;
+
+	parent = clk_hw_get_parent(hw);
+	if (!parent) {
+		pr_err("alpha pll: no valid parent found\n");
+		return -EINVAL;
+	}
+
+	vco = alpha_pll_find_vco(pll, clk_hw_get_rate(hw));
+	if (!vco) {
+		pr_err("alpha pll: not in a valid vco range\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * As during slewing plls vco_sel won't be allowed to change, vco table
+	 * should have only one entry table, i.e. index = 0, find the
+	 * calibration frequency.
+	 */
+	calibration_freq = (pll->vco_table[0].min_freq + pll->vco_table[0].max_freq) / 2;
+
+	freq_hz = alpha_pll_round_rate(calibration_freq, clk_hw_get_rate(parent),
+					&l, &a, ALPHA_REG_BITWIDTH);
+	if (freq_hz != calibration_freq) {
+		pr_err("alpha_pll: call clk_set_rate with rounded rates!\n");
+		return -EINVAL;
+	}
+
+	clk_alpha_pll_update_configs(pll, vco, l, a, ALPHA_REG_BITWIDTH, false);
+
+	/* Bringup the pll at calibration frequency */
+	rc = clk_alpha_pll_enable(hw);
+	if (rc) {
+		pr_err("alpha pll calibration failed\n");
+		return rc;
+	}
+
+	/*
+	 * PLL is already running at calibration frequency.
+	 * So slew pll to the previously set frequency.
+	 */
+	freq_hz = alpha_pll_round_rate(clk_hw_get_rate(hw),
+			clk_hw_get_rate(parent), &l, &a, ALPHA_REG_BITWIDTH);
+
+	pr_debug("pll %s: setting back to required rate %lu, freq_hz %ld\n",
+		clk_hw_get_name(hw), clk_hw_get_rate(hw), freq_hz);
+
+	clk_alpha_pll_update_configs(pll, NULL, l, a, ALPHA_REG_BITWIDTH, true);
+
+	return clk_alpha_pll_slew_update(pll);
+}
+
+static int clk_alpha_pll_slew_enable(struct clk_hw *hw)
+{
+	int rc;
+
+	rc = clk_alpha_pll_calibrate(hw);
+	if (rc)
+		return rc;
+
+	return clk_alpha_pll_enable(hw);
+}
+
+const struct clk_ops clk_alpha_pll_slew_ops = {
+	.enable = clk_alpha_pll_slew_enable,
+	.disable = clk_alpha_pll_disable,
+	.recalc_rate = clk_alpha_pll_recalc_rate,
+	.round_rate = clk_alpha_pll_round_rate,
+	.set_rate = clk_alpha_pll_slew_set_rate,
+};
+EXPORT_SYMBOL(clk_alpha_pll_slew_ops);