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clk: sprd: add gate for pll clocks

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Some sprd's gate clocks are used to the switch of pll, which
need to wait a certain time for stable after being enabled.

Signed-off-by: Xiaolong Zhang <xiaolong.zhang@unisoc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lkml.kernel.org/r/20200304072730.9193-2-zhang.lyra@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Xiaolong Zhang
2020-03-04 15:27:24 +08:00
committed by Stephen Boyd
parent bb6d3fb354
commit 187e5cd2d1
2 changed files with 36 additions and 2 deletions
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17
drivers/clk/sprd/gate.c
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@@ -79,6 +79,17 @@ static int sprd_sc_gate_enable(struct clk_hw *hw)
return 0;
}
static int sprd_pll_sc_gate_prepare(struct clk_hw *hw)
{
struct sprd_gate *sg = hw_to_sprd_gate(hw);
clk_sc_gate_toggle(sg, true);
udelay(sg->udelay);
return 0;
}
static int sprd_gate_is_enabled(struct clk_hw *hw)
{
struct sprd_gate *sg = hw_to_sprd_gate(hw);
@@ -109,3 +120,9 @@ const struct clk_ops sprd_sc_gate_ops = {
};
EXPORT_SYMBOL_GPL(sprd_sc_gate_ops);
const struct clk_ops sprd_pll_sc_gate_ops = {
.unprepare = sprd_sc_gate_disable,
.prepare = sprd_pll_sc_gate_prepare,
.is_enabled = sprd_gate_is_enabled,
};
EXPORT_SYMBOL_GPL(sprd_pll_sc_gate_ops);