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clk: qcom: clock-local2: Add support for RCGs with dynamic pll

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Some RCGSs can have sources with dynamic frequencies.
Add a member in clk_freq_tbl to represent source frequency
which rcg_set_rate uses to set its parent frequency.

Set src_freq to 0 for fixed frequency sources.

Change-Id: I4fddf707924e73706eda45df203cbb3ac1502f0c
Signed-off-by: Arun KS <arunks@codeaurora.org>
This commit is contained in:
Arun KS 2015-03-27 20:17:35 +05:30
parent 8a6c25445d
commit 36f0c149bd
2 changed files with 9 additions and 0 deletions
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6
drivers/clk/qcom/clock-local2.c
View file

@ -263,6 +263,12 @@ static int rcg_clk_set_rate(struct clk *c, unsigned long rate)
cf = rcg->current_freq;
if (nf->src_freq != FIXED_CLK_SRC) {
rc = clk_set_rate(nf->src_clk, nf->src_freq);
if (rc)
return rc;
}
rc = __clk_pre_reparent(c, nf->src_clk, &flags);
if (rc)
return rc;

3
include/soc/qcom/clock-local2.h
View file

@ -24,6 +24,7 @@
/**
* @freq_hz: output rate
* @src_freq: source freq for dynamic pll. For fixed plls, set to 0.
* @src_clk: source clock for freq_hz
* @m_val: M value corresponding to freq_hz
* @n_val: N value corresponding to freq_hz
@ -33,6 +34,7 @@
*/
struct clk_freq_tbl {
unsigned long freq_hz;
unsigned long src_freq;
struct clk *src_clk;
u32 m_val;
u32 n_val;
@ -43,6 +45,7 @@ struct clk_freq_tbl {
#define FREQ_END (ULONG_MAX-1)
#define F_END { .freq_hz = FREQ_END }
#define FIXED_CLK_SRC 0
/*
* Generic clock-definition struct and macros