[PATCH V3 6/8] SPEAr: clk: Add General Purpose Timer Synthesizer clock
From: Viresh Kumar <hidden>
Date: 2012-04-27 04:46:17
Subsystem:
common clk framework, spear platform/clock/pinctrl support, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Viresh Kumar, Linus Torvalds
On 4/24/2012 12:20 PM, Viresh KUMAR wrote:
All SPEAr SoC's contain GPT Synthesizers. Their Fout is derived from following equations: Fout= Fin/((2 ^ (N+1)) * (M+1)) This patch adds in support for this type of clock.
fixup! SPEAr: clk: Add General Purpose Timer Synthesizer clock
---
drivers/clk/spear/clk-gpt-synth.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/clk/spear/clk-gpt-synth.c b/drivers/clk/spear/clk-gpt-synth.c
index 514539c..f3b252a 100644
--- a/drivers/clk/spear/clk-gpt-synth.c
+++ b/drivers/clk/spear/clk-gpt-synth.c@@ -46,10 +46,11 @@ static long clk_gpt_round_rate(struct clk_hw *hw, unsigned long drate, unsigned long *prate) { struct clk_gpt *gpt = to_clk_gpt(hw); + unsigned long parent_rate = __clk_get_rate(__clk_get_parent(hw->clk)); int unused; - return clk_round_rate_index(hw, drate, gpt_calc_rate, gpt->rtbl_cnt, - &unused); + return clk_round_rate_index(hw, drate, parent_rate, gpt_calc_rate, + gpt->rtbl_cnt, &unused); } static unsigned long clk_gpt_recalc_rate(struct clk_hw *hw,
@@ -77,14 +78,16 @@ static unsigned long clk_gpt_recalc_rate(struct clk_hw *hw, } /* Configures new clock rate of gpt */ -static int clk_gpt_set_rate(struct clk_hw *hw, unsigned long drate) +static int clk_gpt_set_rate(struct clk_hw *hw, unsigned long drate, + unsigned long prate) { struct clk_gpt *gpt = to_clk_gpt(hw); struct gpt_rate_tbl *rtbl = gpt->rtbl; unsigned long flags = 0, val; int i; - clk_round_rate_index(hw, drate, gpt_calc_rate, gpt->rtbl_cnt, &i); + clk_round_rate_index(hw, drate, prate, gpt_calc_rate, gpt->rtbl_cnt, + &i); if (gpt->lock) spin_lock_irqsave(gpt->lock, flags);
--
viresh