drivers/clk/clk-gate.c

18  * DOC: basic gatable clock which can gate and ungate its output
27 static inline u32 clk_gate_readl(struct clk_gate *gate)
29 	if (gate->flags & CLK_GATE_BIG_ENDIAN)
30 		return ioread32be(gate->reg);
32 	return readl(gate->reg);
35 static inline void clk_gate_writel(struct clk_gate *gate, u32 val)
37 	if (gate->flags & CLK_GATE_BIG_ENDIAN)
38 		iowrite32be(val, gate->reg);
40 		writel(val, gate->reg);
58 	struct clk_gate *gate = to_clk_gate(hw);
59 	int set = gate->flags & CLK_GATE_SET_TO_DISABLE ? 1 : 0;
65 	if (gate->lock)
66 		spin_lock_irqsave(gate->lock, flags);
68 		__acquire(gate->lock);
70 	if (gate->flags & CLK_GATE_HIWORD_MASK) {
71 		reg = BIT(gate->bit_idx + 16);
73 			reg |= BIT(gate->bit_idx);
75 		reg = clk_gate_readl(gate);
78 			reg |= BIT(gate->bit_idx);
80 			reg &= ~BIT(gate->bit_idx);
83 	clk_gate_writel(gate, reg);
85 	if (gate->lock)
86 		spin_unlock_irqrestore(gate->lock, flags);
88 		__release(gate->lock);
106 	struct clk_gate *gate = to_clk_gate(hw);
108 	reg = clk_gate_readl(gate);
111 	if (gate->flags & CLK_GATE_SET_TO_DISABLE)
112 		reg ^= BIT(gate->bit_idx);
114 	reg &= BIT(gate->bit_idx);
135 	struct clk_gate *gate;
142 			pr_err("gate bit exceeds LOWORD field\n");
147 	/* allocate the gate */
148 	gate = kzalloc(sizeof(*gate), GFP_KERNEL);
149 	if (!gate)
164 	gate->reg = reg;
165 	gate->bit_idx = bit_idx;
166 	gate->flags = clk_gate_flags;
167 	gate->lock = lock;
168 	gate->hw.init = &init;
170 	hw = &gate->hw;
176 		kfree(gate);
202 	struct clk_gate *gate;
209 	gate = to_clk_gate(hw);
212 	kfree(gate);
218 	struct clk_gate *gate;
220 	gate = to_clk_gate(hw);
223 	kfree(gate);