74 lines
2.8 KiB
Diff
74 lines
2.8 KiB
Diff
From de7bfadd1022613ab2c7eeca124bb1e4a6f4c072 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Emilio=20L=C3=B3pez?= <emilio@elopez.com.ar>
|
|
Date: Thu, 5 Sep 2013 19:43:33 -0300
|
|
Subject: [PATCH] clk: composite: .determine_rate support
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
This commit adds .determine_rate support to the composite clock. It will
|
|
use the .determine_rate callback from the rate component if available,
|
|
and fall back on the mux component otherwise. This allows composite
|
|
clocks to enjoy the benefits of automatic clock reparenting.
|
|
|
|
Signed-off-by: Emilio López <emilio@elopez.com.ar>
|
|
---
|
|
drivers/clk/clk-composite.c | 28 ++++++++++++++++++++++++++++
|
|
1 file changed, 28 insertions(+)
|
|
|
|
diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
|
|
index a33f46f..753d0b7 100644
|
|
--- a/drivers/clk/clk-composite.c
|
|
+++ b/drivers/clk/clk-composite.c
|
|
@@ -55,6 +55,30 @@ static unsigned long clk_composite_recalc_rate(struct clk_hw *hw,
|
|
return rate_ops->recalc_rate(rate_hw, parent_rate);
|
|
}
|
|
|
|
+static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
|
|
+ unsigned long *best_parent_rate,
|
|
+ struct clk **best_parent_p)
|
|
+{
|
|
+ struct clk_composite *composite = to_clk_composite(hw);
|
|
+ const struct clk_ops *rate_ops = composite->rate_ops;
|
|
+ const struct clk_ops *mux_ops = composite->mux_ops;
|
|
+ struct clk_hw *rate_hw = composite->rate_hw;
|
|
+ struct clk_hw *mux_hw = composite->mux_hw;
|
|
+
|
|
+ if (rate_hw && rate_ops && rate_ops->determine_rate) {
|
|
+ rate_hw->clk = hw->clk;
|
|
+ return rate_ops->determine_rate(rate_hw, rate, best_parent_rate,
|
|
+ best_parent_p);
|
|
+ } else if (mux_hw && mux_ops && mux_ops->determine_rate) {
|
|
+ mux_hw->clk = hw->clk;
|
|
+ return mux_ops->determine_rate(rate_hw, rate, best_parent_rate,
|
|
+ best_parent_p);
|
|
+ } else {
|
|
+ pr_err("clk: clk_composite_determine_rate function called, but no mux or rate callback set!\n");
|
|
+ return 0;
|
|
+ }
|
|
+}
|
|
+
|
|
static long clk_composite_round_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long *prate)
|
|
{
|
|
@@ -147,6 +171,8 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
|
|
composite->mux_ops = mux_ops;
|
|
clk_composite_ops->get_parent = clk_composite_get_parent;
|
|
clk_composite_ops->set_parent = clk_composite_set_parent;
|
|
+ if (mux_ops->determine_rate)
|
|
+ clk_composite_ops->determine_rate = clk_composite_determine_rate;
|
|
}
|
|
|
|
if (rate_hw && rate_ops) {
|
|
@@ -170,6 +196,8 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
|
|
composite->rate_hw = rate_hw;
|
|
composite->rate_ops = rate_ops;
|
|
clk_composite_ops->recalc_rate = clk_composite_recalc_rate;
|
|
+ if (rate_ops->determine_rate)
|
|
+ clk_composite_ops->determine_rate = clk_composite_determine_rate;
|
|
}
|
|
|
|
if (gate_hw && gate_ops) {
|
|
--
|
|
1.8.5.1
|
|
|