1 files changed, 173 insertions, 47 deletions

diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
index be6b51694919..0a8fc9649ae2 100644
--- a/drivers/clk/samsung/clk-pll.c
+++ b/drivers/clk/samsung/clk-pll.c
@@ -11,14 +11,12 @@
 #include <linux/iopoll.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
-#include <linux/timekeeping.h>
 #include <linux/clk-provider.h>
 #include <linux/io.h>
 #include "clk.h"
 #include "clk-pll.h"
 
-#define PLL_TIMEOUT_US		20000U
-#define PLL_TIMEOUT_LOOPS	1000000U
+#define PLL_TIMEOUT_LOOPS	20000U
 
 struct samsung_clk_pll {
 	struct clk_hw		hw;
@@ -49,37 +47,33 @@ static const struct samsung_pll_rate_table *samsung_get_pll_settings(
 	return NULL;
 }
 
-static long samsung_pll_round_rate(struct clk_hw *hw,
-			unsigned long drate, unsigned long *prate)
+static int samsung_pll_determine_rate(struct clk_hw *hw,
+				      struct clk_rate_request *req)
 {
 	struct samsung_clk_pll *pll = to_clk_pll(hw);
 	const struct samsung_pll_rate_table *rate_table = pll->rate_table;
 	int i;
 
-	/* Assumming rate_table is in descending order */
+	/* Assuming rate_table is in descending order */
 	for (i = 0; i < pll->rate_count; i++) {
-		if (drate >= rate_table[i].rate)
-			return rate_table[i].rate;
+		if (req->rate >= rate_table[i].rate) {
+			req->rate = rate_table[i].rate;
+
+			return 0;
+		}
 	}
 
 	/* return minimum supported value */
-	return rate_table[i - 1].rate;
-}
+	req->rate = rate_table[i - 1].rate;
 
-static bool pll_early_timeout = true;
-
-static int __init samsung_pll_disable_early_timeout(void)
-{
-	pll_early_timeout = false;
 	return 0;
 }
-arch_initcall(samsung_pll_disable_early_timeout);
 
 /* Wait until the PLL is locked */
 static int samsung_pll_lock_wait(struct samsung_clk_pll *pll,
 				 unsigned int reg_mask)
 {
-	int i, ret;
+	int ret;
 	u32 val;
 
 	/*
@@ -88,25 +82,15 @@ static int samsung_pll_lock_wait(struct samsung_clk_pll *pll,
 	 * initialized, another when the timekeeping is suspended. udelay() also
 	 * cannot be used when the clocksource is not running on arm64, since
 	 * the current timer is used as cycle counter. So a simple busy loop
-	 * is used here in that special cases. The limit of iterations has been
-	 * derived from experimental measurements of various PLLs on multiple
-	 * Exynos SoC variants. Single register read time was usually in range
-	 * 0.4...1.5 us, never less than 0.4 us.
+	 * is used here.
+	 * The limit of iterations has been derived from experimental
+	 * measurements of various PLLs on multiple Exynos SoC variants. Single
+	 * register read time was usually in range 0.4...1.5 us, never less than
+	 * 0.4 us.
 	 */
-	if (pll_early_timeout || timekeeping_suspended) {
-		i = PLL_TIMEOUT_LOOPS;
-		while (i-- > 0) {
-			if (readl_relaxed(pll->con_reg) & reg_mask)
-				return 0;
-
-			cpu_relax();
-		}
-		ret = -ETIMEDOUT;
-	} else {
-		ret = readl_relaxed_poll_timeout_atomic(pll->con_reg, val,
-					val & reg_mask, 0, PLL_TIMEOUT_US);
-	}
-
+	ret = readl_relaxed_poll_timeout_atomic(pll->con_reg, val,
+						val & reg_mask, 0,
+						PLL_TIMEOUT_LOOPS);
 	if (ret < 0)
 		pr_err("Could not lock PLL %s\n", clk_hw_get_name(&pll->hw));
 
@@ -206,6 +190,7 @@ static const struct clk_ops samsung_pll3000_clk_ops = {
  */
 /* Maximum lock time can be 270 * PDIV cycles */
 #define PLL35XX_LOCK_FACTOR	(270)
+#define PLL142XX_LOCK_FACTOR	(150)
 
 #define PLL35XX_MDIV_MASK       (0x3FF)
 #define PLL35XX_PDIV_MASK       (0x3F)
@@ -272,7 +257,11 @@ static int samsung_pll35xx_set_rate(struct clk_hw *hw, unsigned long drate,
 	}
 
 	/* Set PLL lock time. */
-	writel_relaxed(rate->pdiv * PLL35XX_LOCK_FACTOR,
+	if (pll->type == pll_142xx || pll->type == pll_1017x)
+		writel_relaxed(rate->pdiv * PLL142XX_LOCK_FACTOR,
+			pll->lock_reg);
+	else
+		writel_relaxed(rate->pdiv * PLL35XX_LOCK_FACTOR,
 			pll->lock_reg);
 
 	/* Change PLL PMS values */
@@ -293,7 +282,7 @@ static int samsung_pll35xx_set_rate(struct clk_hw *hw, unsigned long drate,
 
 static const struct clk_ops samsung_pll35xx_clk_ops = {
 	.recalc_rate = samsung_pll35xx_recalc_rate,
-	.round_rate = samsung_pll_round_rate,
+	.determine_rate = samsung_pll_determine_rate,
 	.set_rate = samsung_pll35xx_set_rate,
 	.enable = samsung_pll3xxx_enable,
 	.disable = samsung_pll3xxx_disable,
@@ -406,7 +395,7 @@ static int samsung_pll36xx_set_rate(struct clk_hw *hw, unsigned long drate,
 static const struct clk_ops samsung_pll36xx_clk_ops = {
 	.recalc_rate = samsung_pll36xx_recalc_rate,
 	.set_rate = samsung_pll36xx_set_rate,
-	.round_rate = samsung_pll_round_rate,
+	.determine_rate = samsung_pll_determine_rate,
 	.enable = samsung_pll3xxx_enable,
 	.disable = samsung_pll3xxx_disable,
 };
@@ -430,7 +419,10 @@ static const struct clk_ops samsung_pll36xx_clk_min_ops = {
 #define PLL0822X_LOCK_STAT_SHIFT	(29)
 #define PLL0822X_ENABLE_SHIFT		(31)
 
-/* PLL1418x is similar to PLL0822x, except that MDIV is one bit smaller */
+/*
+ * PLL1418x, PLL0717x and PLL0718x are similar
+ * to PLL0822x, except that MDIV is one bit smaller
+ */
 #define PLL1418X_MDIV_MASK		(0x1FF)
 
 static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw,
@@ -441,10 +433,14 @@ static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw,
 	u64 fvco = parent_rate;
 
 	pll_con3 = readl_relaxed(pll->con_reg);
-	if (pll->type != pll_1418x)
+
+	if (pll->type != pll_1418x &&
+	    pll->type != pll_0717x &&
+	    pll->type != pll_0718x)
 		mdiv = (pll_con3 >> PLL0822X_MDIV_SHIFT) & PLL0822X_MDIV_MASK;
 	else
 		mdiv = (pll_con3 >> PLL0822X_MDIV_SHIFT) & PLL1418X_MDIV_MASK;
+
 	pdiv = (pll_con3 >> PLL0822X_PDIV_SHIFT) & PLL0822X_PDIV_MASK;
 	sdiv = (pll_con3 >> PLL0822X_SDIV_SHIFT) & PLL0822X_SDIV_MASK;
 
@@ -502,7 +498,7 @@ static int samsung_pll0822x_set_rate(struct clk_hw *hw, unsigned long drate,
 
 static const struct clk_ops samsung_pll0822x_clk_ops = {
 	.recalc_rate = samsung_pll0822x_recalc_rate,
-	.round_rate = samsung_pll_round_rate,
+	.determine_rate = samsung_pll_determine_rate,
 	.set_rate = samsung_pll0822x_set_rate,
 	.enable = samsung_pll3xxx_enable,
 	.disable = samsung_pll3xxx_disable,
@@ -600,7 +596,7 @@ static int samsung_pll0831x_set_rate(struct clk_hw *hw, unsigned long drate,
 static const struct clk_ops samsung_pll0831x_clk_ops = {
 	.recalc_rate = samsung_pll0831x_recalc_rate,
 	.set_rate = samsung_pll0831x_set_rate,
-	.round_rate = samsung_pll_round_rate,
+	.determine_rate = samsung_pll_determine_rate,
 	.enable = samsung_pll3xxx_enable,
 	.disable = samsung_pll3xxx_disable,
 };
@@ -723,7 +719,7 @@ static int samsung_pll45xx_set_rate(struct clk_hw *hw, unsigned long drate,
 
 static const struct clk_ops samsung_pll45xx_clk_ops = {
 	.recalc_rate = samsung_pll45xx_recalc_rate,
-	.round_rate = samsung_pll_round_rate,
+	.determine_rate = samsung_pll_determine_rate,
 	.set_rate = samsung_pll45xx_set_rate,
 };
 
@@ -868,7 +864,7 @@ static int samsung_pll46xx_set_rate(struct clk_hw *hw, unsigned long drate,
 
 static const struct clk_ops samsung_pll46xx_clk_ops = {
 	.recalc_rate = samsung_pll46xx_recalc_rate,
-	.round_rate = samsung_pll_round_rate,
+	.determine_rate = samsung_pll_determine_rate,
 	.set_rate = samsung_pll46xx_set_rate,
 };
 
@@ -1081,7 +1077,7 @@ static int samsung_pll2550xx_set_rate(struct clk_hw *hw, unsigned long drate,
 
 static const struct clk_ops samsung_pll2550xx_clk_ops = {
 	.recalc_rate = samsung_pll2550xx_recalc_rate,
-	.round_rate = samsung_pll_round_rate,
+	.determine_rate = samsung_pll_determine_rate,
 	.set_rate = samsung_pll2550xx_set_rate,
 };
 
@@ -1173,7 +1169,7 @@ static int samsung_pll2650x_set_rate(struct clk_hw *hw, unsigned long drate,
 
 static const struct clk_ops samsung_pll2650x_clk_ops = {
 	.recalc_rate = samsung_pll2650x_recalc_rate,
-	.round_rate = samsung_pll_round_rate,
+	.determine_rate = samsung_pll_determine_rate,
 	.set_rate = samsung_pll2650x_set_rate,
 };
 
@@ -1265,7 +1261,7 @@ static int samsung_pll2650xx_set_rate(struct clk_hw *hw, unsigned long drate,
 static const struct clk_ops samsung_pll2650xx_clk_ops = {
 	.recalc_rate = samsung_pll2650xx_recalc_rate,
 	.set_rate = samsung_pll2650xx_set_rate,
-	.round_rate = samsung_pll_round_rate,
+	.determine_rate = samsung_pll_determine_rate,
 };
 
 static const struct clk_ops samsung_pll2650xx_clk_min_ops = {
@@ -1313,6 +1309,125 @@ static const struct clk_ops samsung_pll531x_clk_ops = {
 	.recalc_rate = samsung_pll531x_recalc_rate,
 };
 
+/*
+ * PLL1031x Clock Type
+ */
+#define PLL1031X_LOCK_FACTOR	(500)
+
+#define PLL1031X_MDIV_MASK	(0x3ff)
+#define PLL1031X_PDIV_MASK	(0x3f)
+#define PLL1031X_SDIV_MASK	(0x7)
+#define PLL1031X_MDIV_SHIFT	(16)
+#define PLL1031X_PDIV_SHIFT	(8)
+#define PLL1031X_SDIV_SHIFT	(0)
+
+#define PLL1031X_KDIV_MASK	(0xffff)
+#define PLL1031X_KDIV_SHIFT	(0)
+#define PLL1031X_MFR_MASK	(0x3f)
+#define PLL1031X_MRR_MASK	(0x1f)
+#define PLL1031X_MFR_SHIFT	(16)
+#define PLL1031X_MRR_SHIFT	(24)
+
+static unsigned long samsung_pll1031x_recalc_rate(struct clk_hw *hw,
+						  unsigned long parent_rate)
+{
+	struct samsung_clk_pll *pll = to_clk_pll(hw);
+	u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con3;
+	u64 fvco = parent_rate;
+
+	pll_con0 = readl_relaxed(pll->con_reg);
+	pll_con3 = readl_relaxed(pll->con_reg + 0xc);
+	mdiv = (pll_con0 >> PLL1031X_MDIV_SHIFT) & PLL1031X_MDIV_MASK;
+	pdiv = (pll_con0 >> PLL1031X_PDIV_SHIFT) & PLL1031X_PDIV_MASK;
+	sdiv = (pll_con0 >> PLL1031X_SDIV_SHIFT) & PLL1031X_SDIV_MASK;
+	kdiv = (pll_con3 & PLL1031X_KDIV_MASK);
+
+	fvco *= (mdiv << PLL1031X_MDIV_SHIFT) + kdiv;
+	do_div(fvco, (pdiv << sdiv));
+	fvco >>= PLL1031X_MDIV_SHIFT;
+
+	return (unsigned long)fvco;
+}
+
+static bool samsung_pll1031x_mpk_change(u32 pll_con0, u32 pll_con3,
+					const struct samsung_pll_rate_table *rate)
+{
+	u32 old_mdiv, old_pdiv, old_kdiv;
+
+	old_mdiv = (pll_con0 >> PLL1031X_MDIV_SHIFT) & PLL1031X_MDIV_MASK;
+	old_pdiv = (pll_con0 >> PLL1031X_PDIV_SHIFT) & PLL1031X_PDIV_MASK;
+	old_kdiv = (pll_con3 >> PLL1031X_KDIV_SHIFT) & PLL1031X_KDIV_MASK;
+
+	return (old_mdiv != rate->mdiv || old_pdiv != rate->pdiv ||
+		old_kdiv != rate->kdiv);
+}
+
+static int samsung_pll1031x_set_rate(struct clk_hw *hw, unsigned long drate,
+				     unsigned long prate)
+{
+	struct samsung_clk_pll *pll = to_clk_pll(hw);
+	const struct samsung_pll_rate_table *rate;
+	u32 con0, con3;
+
+	/* Get required rate settings from table */
+	rate = samsung_get_pll_settings(pll, drate);
+	if (!rate) {
+		pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
+		       drate, clk_hw_get_name(hw));
+		return -EINVAL;
+	}
+
+	con0 = readl_relaxed(pll->con_reg);
+	con3 = readl_relaxed(pll->con_reg + 0xc);
+
+	if (!(samsung_pll1031x_mpk_change(con0, con3, rate))) {
+		/* If only s change, change just s value only */
+		con0 &= ~(PLL1031X_SDIV_MASK << PLL1031X_SDIV_SHIFT);
+		con0 |= rate->sdiv << PLL1031X_SDIV_SHIFT;
+		writel_relaxed(con0, pll->con_reg);
+
+		return 0;
+	}
+
+	/* Set PLL lock time. */
+	writel_relaxed(rate->pdiv * PLL1031X_LOCK_FACTOR, pll->lock_reg);
+
+	/* Set PLL M, P, and S values. */
+	con0 &= ~((PLL1031X_MDIV_MASK << PLL1031X_MDIV_SHIFT) |
+		  (PLL1031X_PDIV_MASK << PLL1031X_PDIV_SHIFT) |
+		  (PLL1031X_SDIV_MASK << PLL1031X_SDIV_SHIFT));
+
+	con0 |= (rate->mdiv << PLL1031X_MDIV_SHIFT) |
+		(rate->pdiv << PLL1031X_PDIV_SHIFT) |
+		(rate->sdiv << PLL1031X_SDIV_SHIFT);
+
+	/* Set PLL K, MFR and MRR values. */
+	con3 = readl_relaxed(pll->con_reg + 0xc);
+	con3 &= ~((PLL1031X_KDIV_MASK << PLL1031X_KDIV_SHIFT) |
+		  (PLL1031X_MFR_MASK << PLL1031X_MFR_SHIFT) |
+		  (PLL1031X_MRR_MASK << PLL1031X_MRR_SHIFT));
+	con3 |= (rate->kdiv << PLL1031X_KDIV_SHIFT) |
+		(rate->mfr << PLL1031X_MFR_SHIFT) |
+		(rate->mrr << PLL1031X_MRR_SHIFT);
+
+	/* Write configuration to PLL */
+	writel_relaxed(con0, pll->con_reg);
+	writel_relaxed(con3, pll->con_reg + 0xc);
+
+	/* Wait for PLL lock if the PLL is enabled */
+	return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
+}
+
+static const struct clk_ops samsung_pll1031x_clk_ops = {
+	.recalc_rate = samsung_pll1031x_recalc_rate,
+	.determine_rate = samsung_pll_determine_rate,
+	.set_rate = samsung_pll1031x_set_rate,
+};
+
+static const struct clk_ops samsung_pll1031x_clk_min_ops = {
+	.recalc_rate = samsung_pll1031x_recalc_rate,
+};
+
 static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
 				const struct samsung_pll_clock *pll_clk)
 {
@@ -1361,6 +1476,7 @@ static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
 	case pll_1451x:
 	case pll_1452x:
 	case pll_142xx:
+	case pll_1017x:
 		pll->enable_offs = PLL35XX_ENABLE_SHIFT;
 		pll->lock_offs = PLL35XX_LOCK_STAT_SHIFT;
 		if (!pll->rate_table)
@@ -1377,6 +1493,9 @@ static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
 	case pll_0516x:
 	case pll_0517x:
 	case pll_0518x:
+	case pll_0717x:
+	case pll_0718x:
+	case pll_0732x:
 		pll->enable_offs = PLL0822X_ENABLE_SHIFT;
 		pll->lock_offs = PLL0822X_LOCK_STAT_SHIFT;
 		if (!pll->rate_table)
@@ -1450,8 +1569,15 @@ static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
 			init.ops = &samsung_pll2650xx_clk_ops;
 		break;
 	case pll_531x:
+	case pll_4311:
 		init.ops = &samsung_pll531x_clk_ops;
 		break;
+	case pll_1031x:
+		if (!pll->rate_table)
+			init.ops = &samsung_pll1031x_clk_min_ops;
+		else
+			init.ops = &samsung_pll1031x_clk_ops;
+		break;
 	default:
 		pr_warn("%s: Unknown pll type for pll clk %s\n",
 			__func__, pll_clk->name);