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clk: qcom: clk-krait: unlock spin after mux completion

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[ Upstream commit df83d2c9e7 ]

Unlock spinlock after the mux switch is completed to prevent any corner
case of mux request while the switch still needs to be done.

Fixes: 4d7dc77bab ("clk: qcom: Add support for Krait clocks")
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220430054458.31321-3-ansuelsmth@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ansuel Smith 2022-04-30 07:44:57 +02:00 committed by Greg Kroah-Hartman
parent a93f33aeef
commit 42f1827096
1 changed files with 6 additions and 1 deletions
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7
drivers/clk/qcom/clk-krait.c
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@ -32,11 +32,16 @@ static void __krait_mux_set_sel(struct krait_mux_clk *mux, int sel)
regval |= (sel & mux->mask) << (mux->shift + LPL_SHIFT); regval |= (sel & mux->mask) << (mux->shift + LPL_SHIFT);
} }
krait_set_l2_indirect_reg(mux->offset, regval); krait_set_l2_indirect_reg(mux->offset, regval);
spin_unlock_irqrestore(&krait_clock_reg_lock, flags);
/* Wait for switch to complete. */ /* Wait for switch to complete. */
mb(); mb();
udelay(1); udelay(1);
/*
* Unlock now to make sure the mux register is not
* modified while switching to the new parent.
*/
spin_unlock_irqrestore(&krait_clock_reg_lock, flags);
} }
static int krait_mux_set_parent(struct clk_hw *hw, u8 index) static int krait_mux_set_parent(struct clk_hw *hw, u8 index)