lkml.org 
[lkml]   [2017]   [Jul]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC 07/12] clk: qcom: add flag for VCO operation
Date
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 <absahu@codeaurora.org>
---
drivers/clk/qcom/clk-alpha-pll.c | 19 ++++++++++++-------
drivers/clk/qcom/clk-alpha-pll.h | 1 +
2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index e38f4d2..0ac9f96 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -415,10 +415,13 @@ 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 & HAVE_NO_VCO_CONF)) {
+ 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);
@@ -428,8 +431,10 @@ static int clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
regmap_write(pll->clkr.regmap, pll_alpha(pll), a);
regmap_write(pll->clkr.regmap, pll_alpha_u(pll), a >> 32);

- regmap_update_bits(pll->clkr.regmap, pll_alpha(pll),
- GENMASK(0, alpha_width - 1), a);
+ if (!(pll->flags & HAVE_NO_VCO_CONF))
+ 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);
@@ -479,7 +484,7 @@ 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 & HAVE_NO_VCO_CONF) || 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 6e40e09..01869a8 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 HAVE_NO_VCO_CONF BIT(5)
u8 flags;

struct clk_regmap clkr;
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
\
 
 \ /
  Last update: 2017-07-27 13:13    [W:0.166 / U:36.824 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site