clk: clk-gate: Create clk_gate_endisable() (fbc42aab) · Commits · 戴 / test

drivers/clk/clk-gate.c

+25 −29

Original line number	Diff line number	Diff line
		@@ -28,32 +28,38 @@

		#define to_clk_gate(_hw) container_of(_hw, struct clk_gate, hw)

		static void clk_gate_set_bit(struct clk_gate *gate)
		/*
		* It works on following logic:
		*
		* For enabling clock, enable = 1
		* set2dis = 1 -> clear bit -> set = 0
		* set2dis = 0 -> set bit -> set = 1
		*
		* For disabling clock, enable = 0
		* set2dis = 1 -> set bit -> set = 1
		* set2dis = 0 -> clear bit -> set = 0
		*
		* So, result is always: enable xor set2dis.
		*/
		static void clk_gate_endisable(struct clk_hw *hw, int enable)
		{
		u32 reg;
		struct clk_gate *gate = to_clk_gate(hw);
		int set = gate->flags & CLK_GATE_SET_TO_DISABLE ? 1 : 0;
		unsigned long flags = 0;

		if (gate->lock)
		spin_lock_irqsave(gate->lock, flags);

		reg = readl(gate->reg);
		reg \|= BIT(gate->bit_idx);
		writel(reg, gate->reg);

		if (gate->lock)
		spin_unlock_irqrestore(gate->lock, flags);
		}

		static void clk_gate_clear_bit(struct clk_gate *gate)
		{
		u32 reg;
		unsigned long flags = 0;

		set ^= enable;

		if (gate->lock)
		spin_lock_irqsave(gate->lock, flags);

		reg = readl(gate->reg);

		if (set)
		reg \|= BIT(gate->bit_idx);
		else
		reg &= ~BIT(gate->bit_idx);

		writel(reg, gate->reg);

		if (gate->lock)
		@@ -62,24 +68,14 @@ static void clk_gate_clear_bit(struct clk_gate *gate)

		static int clk_gate_enable(struct clk_hw *hw)
		{
		struct clk_gate *gate = to_clk_gate(hw);

		if (gate->flags & CLK_GATE_SET_TO_DISABLE)
		clk_gate_clear_bit(gate);
		else
		clk_gate_set_bit(gate);
		clk_gate_endisable(hw, 1);

		return 0;
		}

		static void clk_gate_disable(struct clk_hw *hw)
		{
		struct clk_gate *gate = to_clk_gate(hw);

		if (gate->flags & CLK_GATE_SET_TO_DISABLE)
		clk_gate_set_bit(gate);
		else
		clk_gate_clear_bit(gate);
		clk_gate_endisable(hw, 0);
		}

		static int clk_gate_is_enabled(struct clk_hw *hw)

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