Linux-libre 4.4-gnupck-4.4-gnu

3 files changed, 124 insertions, 82 deletions

diff --git a/drivers/clk/rockchip/clk-mmc-phase.c b/drivers/clk/rockchip/clk-mmc-phase.c
index 9b613426e..268564482 100644
--- a/drivers/clk/rockchip/clk-mmc-phase.c
+++ b/drivers/clk/rockchip/clk-mmc-phase.c
@@ -41,12 +41,14 @@ static unsigned long rockchip_mmc_recalc(struct clk_hw *hw,
 #define ROCKCHIP_MMC_DEGREE_MASK 0x3
 #define ROCKCHIP_MMC_DELAYNUM_OFFSET 2
 #define ROCKCHIP_MMC_DELAYNUM_MASK (0xff << ROCKCHIP_MMC_DELAYNUM_OFFSET)
+#define ROCKCHIP_MMC_INIT_STATE_RESET 0x1
+#define ROCKCHIP_MMC_INIT_STATE_SHIFT 1
 
 #define PSECS_PER_SEC 1000000000000LL
 
 /*
- * Each fine delay is between 40ps-80ps. Assume each fine delay is 60ps to
- * simplify calculations. So 45degs could be anywhere between 33deg and 66deg.
+ * Each fine delay is between 44ps-77ps. Assume each fine delay is 60ps to
+ * simplify calculations. So 45degs could be anywhere between 33deg and 57.8deg.
  */
 #define ROCKCHIP_MMC_DELAY_ELEMENT_PSEC 60
 
@@ -69,7 +71,7 @@ static int rockchip_mmc_get_phase(struct clk_hw *hw)
 
 		delay_num = (raw_value & ROCKCHIP_MMC_DELAYNUM_MASK);
 		delay_num >>= ROCKCHIP_MMC_DELAYNUM_OFFSET;
-		degrees += delay_num * factor / 10000;
+		degrees += DIV_ROUND_CLOSEST(delay_num * factor, 10000);
 	}
 
 	return degrees % 360;
@@ -82,25 +84,41 @@ static int rockchip_mmc_set_phase(struct clk_hw *hw, int degrees)
 	u8 nineties, remainder;
 	u8 delay_num;
 	u32 raw_value;
-	u64 delay;
-
-	/* allow 22 to be 22.5 */
-	degrees++;
-	/* floor to 22.5 increment */
-	degrees -= ((degrees) * 10 % 225) / 10;
+	u32 delay;
 
 	nineties = degrees / 90;
-	/* 22.5 multiples */
-	remainder = (degrees % 90) / 22;
-
-	delay = PSECS_PER_SEC;
-	do_div(delay, rate);
-	/* / 360 / 22.5 */
-	do_div(delay, 16);
-	do_div(delay, ROCKCHIP_MMC_DELAY_ELEMENT_PSEC);
-
+	remainder = (degrees % 90);
+
+	/*
+	 * Due to the inexact nature of the "fine" delay, we might
+	 * actually go non-monotonic.  We don't go _too_ monotonic
+	 * though, so we should be OK.  Here are options of how we may
+	 * work:
+	 *
+	 * Ideally we end up with:
+	 *   1.0, 2.0, ..., 69.0, 70.0, ...,  89.0, 90.0
+	 *
+	 * On one extreme (if delay is actually 44ps):
+	 *   .73, 1.5, ..., 50.6, 51.3, ...,  65.3, 90.0
+	 * The other (if delay is actually 77ps):
+	 *   1.3, 2.6, ..., 88.6. 89.8, ..., 114.0, 90
+	 *
+	 * It's possible we might make a delay that is up to 25
+	 * degrees off from what we think we're making.  That's OK
+	 * though because we should be REALLY far from any bad range.
+	 */
+
+	/*
+	 * Convert to delay; do a little extra work to make sure we
+	 * don't overflow 32-bit / 64-bit numbers.
+	 */
+	delay = 10000000; /* PSECS_PER_SEC / 10000 / 10 */
 	delay *= remainder;
-	delay_num = (u8) min(delay, 255ULL);
+	delay = DIV_ROUND_CLOSEST(delay,
+			(rate / 1000) * 36 *
+				(ROCKCHIP_MMC_DELAY_ELEMENT_PSEC / 10));
+
+	delay_num = (u8) min_t(u32, delay, 255);
 
 	raw_value = delay_num ? ROCKCHIP_MMC_DELAY_SEL : 0;
 	raw_value |= delay_num << ROCKCHIP_MMC_DELAYNUM_OFFSET;
@@ -143,6 +161,15 @@ struct clk *rockchip_clk_register_mmc(const char *name,
 	mmc_clock->reg = reg;
 	mmc_clock->shift = shift;
 
+	/*
+	 * Assert init_state to soft reset the CLKGEN
+	 * for mmc tuning phase and degree
+	 */
+	if (mmc_clock->shift == ROCKCHIP_MMC_INIT_STATE_SHIFT)
+		writel(HIWORD_UPDATE(ROCKCHIP_MMC_INIT_STATE_RESET,
+				     ROCKCHIP_MMC_INIT_STATE_RESET,
+				     mmc_clock->shift), mmc_clock->reg);
+
 	clk = clk_register(NULL, &mmc_clock->hw);
 	if (IS_ERR(clk))
 		goto err_free;
diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
index 7737a1df1..4881eb8a1 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -126,11 +126,32 @@ static int rockchip_pll_wait_lock(struct rockchip_clk_pll *pll)
 #define RK3066_PLLCON3_PWRDOWN		(1 << 1)
 #define RK3066_PLLCON3_BYPASS		(1 << 0)
 
+static void rockchip_rk3066_pll_get_params(struct rockchip_clk_pll *pll,
+					struct rockchip_pll_rate_table *rate)
+{
+	u32 pllcon;
+
+	pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(0));
+	rate->nr = ((pllcon >> RK3066_PLLCON0_NR_SHIFT)
+				& RK3066_PLLCON0_NR_MASK) + 1;
+	rate->no = ((pllcon >> RK3066_PLLCON0_OD_SHIFT)
+				& RK3066_PLLCON0_OD_MASK) + 1;
+
+	pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(1));
+	rate->nf = ((pllcon >> RK3066_PLLCON1_NF_SHIFT)
+				& RK3066_PLLCON1_NF_MASK) + 1;
+
+	pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(2));
+	rate->nb = ((pllcon >> RK3066_PLLCON2_NB_SHIFT)
+				& RK3066_PLLCON2_NB_MASK) + 1;
+}
+
 static unsigned long rockchip_rk3066_pll_recalc_rate(struct clk_hw *hw,
 						     unsigned long prate)
 {
 	struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
-	u64 nf, nr, no, rate64 = prate;
+	struct rockchip_pll_rate_table cur;
+	u64 rate64 = prate;
 	u32 pllcon;
 
 	pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(3));
@@ -140,53 +161,31 @@ static unsigned long rockchip_rk3066_pll_recalc_rate(struct clk_hw *hw,
 		return prate;
 	}
 
-	pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(1));
-	nf = (pllcon >> RK3066_PLLCON1_NF_SHIFT) & RK3066_PLLCON1_NF_MASK;
-
-	pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(0));
-	nr = (pllcon >> RK3066_PLLCON0_NR_SHIFT) & RK3066_PLLCON0_NR_MASK;
-	no = (pllcon >> RK3066_PLLCON0_OD_SHIFT) & RK3066_PLLCON0_OD_MASK;
+	rockchip_rk3066_pll_get_params(pll, &cur);
 
-	rate64 *= (nf + 1);
-	do_div(rate64, nr + 1);
-	do_div(rate64, no + 1);
+	rate64 *= cur.nf;
+	do_div(rate64, cur.nr);
+	do_div(rate64, cur.no);
 
 	return (unsigned long)rate64;
 }
 
-static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
-					unsigned long prate)
+static int rockchip_rk3066_pll_set_params(struct rockchip_clk_pll *pll,
+				const struct rockchip_pll_rate_table *rate)
 {
-	struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
-	const struct rockchip_pll_rate_table *rate;
-	unsigned long old_rate = rockchip_rk3066_pll_recalc_rate(hw, prate);
-	struct regmap *grf = rockchip_clk_get_grf();
-	struct clk_mux *pll_mux = &pll->pll_mux;
 	const struct clk_ops *pll_mux_ops = pll->pll_mux_ops;
+	struct clk_mux *pll_mux = &pll->pll_mux;
+	struct rockchip_pll_rate_table cur;
 	int rate_change_remuxed = 0;
 	int cur_parent;
 	int ret;
 
-	if (IS_ERR(grf)) {
-		pr_debug("%s: grf regmap not available, aborting rate change\n",
-			 __func__);
-		return PTR_ERR(grf);
-	}
-
-	pr_debug("%s: changing %s from %lu to %lu with a parent rate of %lu\n",
-		 __func__, clk_hw_get_name(hw), old_rate, drate, prate);
-
-	/* Get required rate settings from table */
-	rate = rockchip_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;
-	}
-
 	pr_debug("%s: rate settings for %lu (nr, no, nf): (%d, %d, %d)\n",
 		 __func__, rate->rate, rate->nr, rate->no, rate->nf);
 
+	rockchip_rk3066_pll_get_params(pll, &cur);
+	cur.rate = 0;
+
 	cur_parent = pll_mux_ops->get_parent(&pll_mux->hw);
 	if (cur_parent == PLL_MODE_NORM) {
 		pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_SLOW);
@@ -219,9 +218,9 @@ static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
 	/* wait for the pll to lock */
 	ret = rockchip_pll_wait_lock(pll);
 	if (ret) {
-		pr_warn("%s: pll did not lock, trying to restore old rate %lu\n",
-			__func__, old_rate);
-		rockchip_rk3066_pll_set_rate(hw, old_rate, prate);
+		pr_warn("%s: pll update unsucessful, trying to restore old params\n",
+			__func__);
+		rockchip_rk3066_pll_set_params(pll, &cur);
 	}
 
 	if (rate_change_remuxed)
@@ -230,6 +229,34 @@ static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
 	return ret;
 }
 
+static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
+					unsigned long prate)
+{
+	struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
+	const struct rockchip_pll_rate_table *rate;
+	unsigned long old_rate = rockchip_rk3066_pll_recalc_rate(hw, prate);
+	struct regmap *grf = rockchip_clk_get_grf();
+
+	if (IS_ERR(grf)) {
+		pr_debug("%s: grf regmap not available, aborting rate change\n",
+			 __func__);
+		return PTR_ERR(grf);
+	}
+
+	pr_debug("%s: changing %s from %lu to %lu with a parent rate of %lu\n",
+		 __func__, clk_hw_get_name(hw), old_rate, drate, prate);
+
+	/* Get required rate settings from table */
+	rate = rockchip_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;
+	}
+
+	return rockchip_rk3066_pll_set_params(pll, rate);
+}
+
 static int rockchip_rk3066_pll_enable(struct clk_hw *hw)
 {
 	struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
@@ -261,9 +288,8 @@ static void rockchip_rk3066_pll_init(struct clk_hw *hw)
 {
 	struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
 	const struct rockchip_pll_rate_table *rate;
-	unsigned int nf, nr, no, nb;
+	struct rockchip_pll_rate_table cur;
 	unsigned long drate;
-	u32 pllcon;
 
 	if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE))
 		return;
@@ -275,34 +301,21 @@ static void rockchip_rk3066_pll_init(struct clk_hw *hw)
 	if (!rate)
 		return;
 
-	pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(0));
-	nr = ((pllcon >> RK3066_PLLCON0_NR_SHIFT) & RK3066_PLLCON0_NR_MASK) + 1;
-	no = ((pllcon >> RK3066_PLLCON0_OD_SHIFT) & RK3066_PLLCON0_OD_MASK) + 1;
-
-	pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(1));
-	nf = ((pllcon >> RK3066_PLLCON1_NF_SHIFT) & RK3066_PLLCON1_NF_MASK) + 1;
-
-	pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(2));
-	nb = ((pllcon >> RK3066_PLLCON2_NB_SHIFT) & RK3066_PLLCON2_NB_MASK) + 1;
+	rockchip_rk3066_pll_get_params(pll, &cur);
 
 	pr_debug("%s: pll %s@%lu: nr (%d:%d); no (%d:%d); nf(%d:%d), nb(%d:%d)\n",
-		 __func__, clk_hw_get_name(hw), drate, rate->nr, nr,
-		rate->no, no, rate->nf, nf, rate->nb, nb);
-	if (rate->nr != nr || rate->no != no || rate->nf != nf
-					     || rate->nb != nb) {
-		struct clk_hw *parent = clk_hw_get_parent(hw);
-		unsigned long prate;
-
-		if (!parent) {
-			pr_warn("%s: parent of %s not available\n",
-				__func__, clk_hw_get_name(hw));
+		 __func__, clk_hw_get_name(hw), drate, rate->nr, cur.nr,
+		 rate->no, cur.no, rate->nf, cur.nf, rate->nb, cur.nb);
+	if (rate->nr != cur.nr || rate->no != cur.no || rate->nf != cur.nf
+						     || rate->nb != cur.nb) {
+		struct regmap *grf = rockchip_clk_get_grf();
+
+		if (IS_ERR(grf))
 			return;
-		}
 
 		pr_debug("%s: pll %s: rate params do not match rate table, adjusting\n",
 			 __func__, clk_hw_get_name(hw));
-		prate = clk_hw_get_rate(parent);
-		rockchip_rk3066_pll_set_rate(hw, drate, prate);
+		rockchip_rk3066_pll_set_params(pll, rate);
 	}
 }
 
diff --git a/drivers/clk/rockchip/clk.c b/drivers/clk/rockchip/clk.c
index 249388156..be6c7fd83 100644
--- a/drivers/clk/rockchip/clk.c
+++ b/drivers/clk/rockchip/clk.c
@@ -135,9 +135,11 @@ static struct clk *rockchip_clk_register_frac_branch(const char *name,
 	div->flags = div_flags;
 	div->reg = base + muxdiv_offset;
 	div->mshift = 16;
-	div->mmask = 0xffff0000;
+	div->mwidth = 16;
+	div->mmask = GENMASK(div->mwidth - 1, 0) << div->mshift;
 	div->nshift = 0;
-	div->nmask = 0xffff;
+	div->nwidth = 16;
+	div->nmask = GENMASK(div->nwidth - 1, 0) << div->nshift;
 	div->lock = lock;
 	div_ops = &clk_fractional_divider_ops;