[RFC,v2,06/12] clk: qcom: add flag for VCO operation

Commit Message

Abhishek Sahu Aug. 8, 2017, 6:24 p.m. UTC

Some of the Alpha PLL’s does not have VCO configuration so this
patch adds the flag and does not perform VCO operation if this
flag is set.

Signed-off-by: Abhishek Sahu <[e-mail]>
---
 drivers/clk/qcom/clk-alpha-pll.c | 19 +++++++++++--------
 drivers/clk/qcom/clk-alpha-pll.h |  1 +
 2 files changed, 12 insertions(+), 8 deletions(-)

Patch

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index 1f37bf8a..c368e7c 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -467,10 +467,12 @@  static int clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 	u64 a;
 
 	rate = alpha_pll_round_rate(rate, prate, &l, &a, alpha_width);
-	vco = alpha_pll_find_vco(pll, rate);
-	if (!vco) {
-		pr_err("alpha pll not in a valid vco range\n");
-		return -EINVAL;
+	if (!(pll->flags & SUPPORTS_NO_VCO)) {
+		vco = alpha_pll_find_vco(pll, rate);
+		if (!vco) {
+			pr_err("alpha pll not in a valid vco range\n");
+			return -EINVAL;
+		}
 	}
 
 	regmap_write(pll->clkr.regmap, pll_l(pll), l);
@@ -483,9 +485,10 @@  static int clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 
 	regmap_write(pll->clkr.regmap, pll_alpha(pll), a);
 
-	regmap_update_bits(pll->clkr.regmap, pll_user_ctl(pll),
-			   PLL_VCO_MASK << PLL_VCO_SHIFT,
-			   vco->val << PLL_VCO_SHIFT);
+	if (!(pll->flags & SUPPORTS_NO_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);
@@ -505,7 +508,7 @@  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->flags & SUPPORTS_NO_VCO) || alpha_pll_find_vco(pll, rate))
 		return rate;
 
 	min_freq = pll->vco_table[0].min_freq;
diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h
index 8b27c05..973673b 100644
--- a/drivers/clk/qcom/clk-alpha-pll.h
+++ b/drivers/clk/qcom/clk-alpha-pll.h
@@ -55,6 +55,7 @@  struct clk_alpha_pll {
 #define SUPPORTS_FSM_MODE		BIT(2)
 #define SUPPORTS_64BIT_CONFIG_CTL	BIT(3)
 #define SUPPORTS_DYNAMIC_UPDATE		BIT(4)
+#define SUPPORTS_NO_VCO			BIT(5)
 	u8 flags;
 
 	struct clk_regmap clkr;