1 files changed, 187 insertions, 5 deletions

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index 2a4b0c9f5c4d..6860f5b1db88 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -47,6 +47,7 @@
 # define PLL_POST_DIV_SHIFT	8
 # define PLL_POST_DIV_MASK	0xf
 # define PLL_ALPHA_EN		BIT(24)
+# define PLL_ALPHA_MODE		BIT(25)
 # define PLL_VCO_SHIFT		20
 # define PLL_VCO_MASK		0x3
 
@@ -70,6 +71,16 @@ const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = {
 		[PLL_OFF_TEST_CTL_U] = 0x20,
 		[PLL_OFF_STATUS] = 0x24,
 	},
+	[CLK_ALPHA_PLL_TYPE_HUAYRA] =  {
+		[PLL_OFF_L_VAL] = 0x04,
+		[PLL_OFF_ALPHA_VAL] = 0x08,
+		[PLL_OFF_USER_CTL] = 0x10,
+		[PLL_OFF_CONFIG_CTL] = 0x14,
+		[PLL_OFF_CONFIG_CTL_U] = 0x18,
+		[PLL_OFF_TEST_CTL] = 0x1c,
+		[PLL_OFF_TEST_CTL_U] = 0x20,
+		[PLL_OFF_STATUS] = 0x24,
+	},
 };
 EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
 
@@ -81,6 +92,13 @@ EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
 #define ALPHA_BITWIDTH		32U
 #define ALPHA_SHIFT(w)		min(w, ALPHA_BITWIDTH)
 
+#define PLL_HUAYRA_M_WIDTH		8
+#define PLL_HUAYRA_M_SHIFT		8
+#define PLL_HUAYRA_M_MASK		0xff
+#define PLL_HUAYRA_N_SHIFT		0
+#define PLL_HUAYRA_N_MASK		0xff
+#define PLL_HUAYRA_ALPHA_WIDTH		16
+
 #define pll_alpha_width(p)					\
 		((PLL_ALPHA_VAL_U(p) - PLL_ALPHA_VAL(p) == 4) ?	\
 				 ALPHA_REG_BITWIDTH : ALPHA_REG_16BIT_WIDTH)
@@ -473,7 +491,7 @@ static int __clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 
 	rate = alpha_pll_round_rate(rate, prate, &l, &a, alpha_width);
 	vco = alpha_pll_find_vco(pll, rate);
-	if (!vco) {
+	if (pll->vco_table && !vco) {
 		pr_err("alpha pll not in a valid vco range\n");
 		return -EINVAL;
 	}
@@ -488,9 +506,11 @@ static int __clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 
 	regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a);
 
-	regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
-			   PLL_VCO_MASK << PLL_VCO_SHIFT,
-			   vco->val << PLL_VCO_SHIFT);
+	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);
@@ -521,7 +541,7 @@ static long clk_alpha_pll_round_rate(struct clk_hw *hw, unsigned long rate,
 	unsigned long min_freq, max_freq;
 
 	rate = alpha_pll_round_rate(rate, *prate, &l, &a, alpha_width);
-	if (alpha_pll_find_vco(pll, rate))
+	if (!pll->vco_table || alpha_pll_find_vco(pll, rate))
 		return rate;
 
 	min_freq = pll->vco_table[0].min_freq;
@@ -530,6 +550,158 @@ static long clk_alpha_pll_round_rate(struct clk_hw *hw, unsigned long rate,
 	return clamp(rate, min_freq, max_freq);
 }
 
+static unsigned long
+alpha_huayra_pll_calc_rate(u64 prate, u32 l, u32 a)
+{
+	/*
+	 * a contains 16 bit alpha_val in two’s compliment number in the range
+	 * of [-0.5, 0.5).
+	 */
+	if (a >= BIT(PLL_HUAYRA_ALPHA_WIDTH - 1))
+		l -= 1;
+
+	return (prate * l) + (prate * a >> PLL_HUAYRA_ALPHA_WIDTH);
+}
+
+static unsigned long
+alpha_huayra_pll_round_rate(unsigned long rate, unsigned long prate,
+			    u32 *l, u32 *a)
+{
+	u64 remainder;
+	u64 quotient;
+
+	quotient = rate;
+	remainder = do_div(quotient, prate);
+	*l = quotient;
+
+	if (!remainder) {
+		*a = 0;
+		return rate;
+	}
+
+	quotient = remainder << PLL_HUAYRA_ALPHA_WIDTH;
+	remainder = do_div(quotient, prate);
+
+	if (remainder)
+		quotient++;
+
+	/*
+	 * alpha_val should be in two’s compliment number in the range
+	 * of [-0.5, 0.5) so if quotient >= 0.5 then increment the l value
+	 * since alpha value will be subtracted in this case.
+	 */
+	if (quotient >= BIT(PLL_HUAYRA_ALPHA_WIDTH - 1))
+		*l += 1;
+
+	*a = quotient;
+	return alpha_huayra_pll_calc_rate(prate, *l, *a);
+}
+
+static unsigned long
+alpha_pll_huayra_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+	u64 rate = parent_rate, tmp;
+	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+	u32 l, alpha = 0, ctl, alpha_m, alpha_n;
+
+	regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l);
+	regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
+
+	if (ctl & PLL_ALPHA_EN) {
+		regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &alpha);
+		/*
+		 * Depending upon alpha_mode, it can be treated as M/N value or
+		 * as a two’s compliment number. When alpha_mode=1,
+		 * pll_alpha_val<15:8>=M and pll_apla_val<7:0>=N
+		 *
+		 *		Fout=FIN*(L+(M/N))
+		 *
+		 * M is a signed number (-128 to 127) and N is unsigned
+		 * (0 to 255). M/N has to be within +/-0.5.
+		 *
+		 * When alpha_mode=0, it is a two’s compliment number in the
+		 * range [-0.5, 0.5).
+		 *
+		 *		Fout=FIN*(L+(alpha_val)/2^16)
+		 *
+		 * where alpha_val is two’s compliment number.
+		 */
+		if (!(ctl & PLL_ALPHA_MODE))
+			return alpha_huayra_pll_calc_rate(rate, l, alpha);
+
+		alpha_m = alpha >> PLL_HUAYRA_M_SHIFT & PLL_HUAYRA_M_MASK;
+		alpha_n = alpha >> PLL_HUAYRA_N_SHIFT & PLL_HUAYRA_N_MASK;
+
+		rate *= l;
+		tmp = parent_rate;
+		if (alpha_m >= BIT(PLL_HUAYRA_M_WIDTH - 1)) {
+			alpha_m = BIT(PLL_HUAYRA_M_WIDTH) - alpha_m;
+			tmp *= alpha_m;
+			do_div(tmp, alpha_n);
+			rate -= tmp;
+		} else {
+			tmp *= alpha_m;
+			do_div(tmp, alpha_n);
+			rate += tmp;
+		}
+
+		return rate;
+	}
+
+	return alpha_huayra_pll_calc_rate(rate, l, alpha);
+}
+
+static int alpha_pll_huayra_set_rate(struct clk_hw *hw, unsigned long rate,
+				     unsigned long prate)
+{
+	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+	u32 l, a, ctl, cur_alpha = 0;
+
+	rate = alpha_huayra_pll_round_rate(rate, prate, &l, &a);
+
+	regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
+
+	if (ctl & PLL_ALPHA_EN)
+		regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &cur_alpha);
+
+	/*
+	 * Huayra PLL supports PLL dynamic programming. User can change L_VAL,
+	 * without having to go through the power on sequence.
+	 */
+	if (clk_alpha_pll_is_enabled(hw)) {
+		if (cur_alpha != a) {
+			pr_err("clock needs to be gated %s\n",
+			       clk_hw_get_name(hw));
+			return -EBUSY;
+		}
+
+		regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
+		/* Ensure that the write above goes to detect L val change. */
+		mb();
+		return wait_for_pll_enable_lock(pll);
+	}
+
+	regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
+	regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a);
+
+	if (a == 0)
+		regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+				   PLL_ALPHA_EN, 0x0);
+	else
+		regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+				   PLL_ALPHA_EN | PLL_ALPHA_MODE, PLL_ALPHA_EN);
+
+	return 0;
+}
+
+static long alpha_pll_huayra_round_rate(struct clk_hw *hw, unsigned long rate,
+					unsigned long *prate)
+{
+	u32 l, a;
+
+	return alpha_huayra_pll_round_rate(rate, *prate, &l, &a);
+}
+
 const struct clk_ops clk_alpha_pll_ops = {
 	.enable = clk_alpha_pll_enable,
 	.disable = clk_alpha_pll_disable,
@@ -540,6 +712,16 @@ const struct clk_ops clk_alpha_pll_ops = {
 };
 EXPORT_SYMBOL_GPL(clk_alpha_pll_ops);
 
+const struct clk_ops clk_alpha_pll_huayra_ops = {
+	.enable = clk_alpha_pll_enable,
+	.disable = clk_alpha_pll_disable,
+	.is_enabled = clk_alpha_pll_is_enabled,
+	.recalc_rate = alpha_pll_huayra_recalc_rate,
+	.round_rate = alpha_pll_huayra_round_rate,
+	.set_rate = alpha_pll_huayra_set_rate,
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_huayra_ops);
+
 const struct clk_ops clk_alpha_pll_hwfsm_ops = {
 	.enable = clk_alpha_pll_hwfsm_enable,
 	.disable = clk_alpha_pll_hwfsm_disable,