diff options
| author | Xiaolong Zhang <xiaolong.zhang@unisoc.com> | 2020-03-04 10:27:24 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2020-03-25 05:03:56 +0300 |
| commit | 187e5cd2d133771e978e7e4ea6aa684dfd1ce6ab (patch) | |
| tree | cb09afa67e7e7b1743cd51b76cedad563fc59713 /drivers/clk/sprd/gate.c | |
| parent | bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9 (diff) | |
| download | linux-187e5cd2d133771e978e7e4ea6aa684dfd1ce6ab.tar.xz | |
clk: sprd: add gate for pll clocks
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>
Diffstat (limited to 'drivers/clk/sprd/gate.c')
| -rw-r--r-- | drivers/clk/sprd/gate.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/clk/sprd/gate.c b/drivers/clk/sprd/gate.c index f59d1936b412..574cfc116bbc 100644 --- a/drivers/clk/sprd/gate.c +++ b/drivers/clk/sprd/gate.c @@ -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); |