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clk: qcom: Add rcg ops to return floor value closest to the requested rate

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The default behaviour with clk_rcg2_ops is for the
clk_round_rate()/clk_set_rate() to return/set a ceil clock
rate closest to the requested rate by looking up the corresponding
frequency table.
However, we do have some instances (mainly sdcc on various platforms)
of clients expecting a clk_set_rate() to set a floor value instead.
Add a new clk_rcg2_floor_ops to handle this for such specific
rcg instances

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Rajendra Nayak
2016-11-21 12:07:11 +05:30
committed by Stephen Boyd
parent c705d22b64
commit 081ba80206
4 changed files with 86 additions and 9 deletions
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2
drivers/clk/qcom/common.h
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@@ -41,6 +41,8 @@ struct qcom_cc_desc {
extern const struct freq_tbl *qcom_find_freq(const struct freq_tbl *f,
unsigned long rate);
extern const struct freq_tbl *qcom_find_freq_floor(const struct freq_tbl *f,
unsigned long rate);
extern void
qcom_pll_set_fsm_mode(struct regmap *m, u32 reg, u8 bias_count, u8 lock_count);
extern int qcom_find_src_index(struct clk_hw *hw, const struct parent_map *map,