4  * Copyright (C) 2011-2012 Mike Turquette, Linaro Ltd <mturquette@linaro.org>
13 #include <linux/clk-provider.h>
23  * prepare - clk_prepare only ensures that parents are prepared
24  * enable - clk_enable only ensures that parents are enabled
25  * rate - rate is only affected by parent switching.  No clk_set_rate support
26  * parent - parent is adjustable through clk_set_parent
40 		return -EINVAL;  in clk_mux_val_to_index()
44 		val = ffs(val) - 1;  in clk_mux_val_to_index()
47 		val--;  in clk_mux_val_to_index()
50 		return -EINVAL;  in clk_mux_val_to_index()
76 	struct clk_mux *mux = to_clk_mux(hw);  in clk_mux_get_parent()  local
79 	val = clk_readl(mux->reg) >> mux->shift;  in clk_mux_get_parent()
80 	val &= mux->mask;  in clk_mux_get_parent()
82 	return clk_mux_val_to_index(hw, mux->table, mux->flags, val);  in clk_mux_get_parent()
87 	struct clk_mux *mux = to_clk_mux(hw);  in clk_mux_set_parent()  local
88 	u32 val = clk_mux_index_to_val(mux->table, mux->flags, index);  in clk_mux_set_parent()
90 	u32 reg;  in clk_mux_set_parent()  local
92 	if (mux->lock)  in clk_mux_set_parent()
93 		spin_lock_irqsave(mux->lock, flags);  in clk_mux_set_parent()
95 		__acquire(mux->lock);  in clk_mux_set_parent()
97 	if (mux->flags & CLK_MUX_HIWORD_MASK) {  in clk_mux_set_parent()
98 		reg = mux->mask << (mux->shift + 16);  in clk_mux_set_parent()
100 		reg = clk_readl(mux->reg);  in clk_mux_set_parent()
101 		reg &= ~(mux->mask << mux->shift);  in clk_mux_set_parent()
103 	val = val << mux->shift;  in clk_mux_set_parent()
104 	reg |= val;  in clk_mux_set_parent()
105 	clk_writel(reg, mux->reg);  in clk_mux_set_parent()
107 	if (mux->lock)  in clk_mux_set_parent()
108 		spin_unlock_irqrestore(mux->lock, flags);  in clk_mux_set_parent()
110 		__release(mux->lock);  in clk_mux_set_parent()
118 	struct clk_mux *mux = to_clk_mux(hw);  in clk_mux_determine_rate()  local
120 	return clk_mux_determine_rate_flags(hw, req, mux->flags);  in clk_mux_determine_rate()
138 		void __iomem *reg, u8 shift, u32 mask,  in clk_hw_register_mux_table()  argument
141 	struct clk_mux *mux;  in clk_hw_register_mux_table()  local
148 		width = fls(mask) - ffs(mask) + 1;  in clk_hw_register_mux_table()
150 			pr_err("mux value exceeds LOWORD field\n");  in clk_hw_register_mux_table()
151 			return ERR_PTR(-EINVAL);  in clk_hw_register_mux_table()
155 	/* allocate the mux */  in clk_hw_register_mux_table()
156 	mux = kzalloc(sizeof(*mux), GFP_KERNEL);  in clk_hw_register_mux_table()
157 	if (!mux)  in clk_hw_register_mux_table()
158 		return ERR_PTR(-ENOMEM);  in clk_hw_register_mux_table()
170 	mux->reg = reg;  in clk_hw_register_mux_table()
171 	mux->shift = shift;  in clk_hw_register_mux_table()
172 	mux->mask = mask;  in clk_hw_register_mux_table()
173 	mux->flags = clk_mux_flags;  in clk_hw_register_mux_table()
174 	mux->lock = lock;  in clk_hw_register_mux_table()
175 	mux->table = table;  in clk_hw_register_mux_table()
176 	mux->hw.init = &init;  in clk_hw_register_mux_table()
178 	hw = &mux->hw;  in clk_hw_register_mux_table()
181 		kfree(mux);  in clk_hw_register_mux_table()
192 		void __iomem *reg, u8 shift, u32 mask,  in clk_register_mux_table()  argument
198 				       flags, reg, shift, mask, clk_mux_flags,  in clk_register_mux_table()
202 	return hw->clk;  in clk_register_mux_table()
209 		void __iomem *reg, u8 shift, u8 width,  in clk_register_mux()  argument
212 	u32 mask = BIT(width) - 1;  in clk_register_mux()
215 				      flags, reg, shift, mask, clk_mux_flags,  in clk_register_mux()
223 		void __iomem *reg, u8 shift, u8 width,  in clk_hw_register_mux()  argument
226 	u32 mask = BIT(width) - 1;  in clk_hw_register_mux()
229 				      flags, reg, shift, mask, clk_mux_flags,  in clk_hw_register_mux()
236 	struct clk_mux *mux;  in clk_unregister_mux()  local
243 	mux = to_clk_mux(hw);  in clk_unregister_mux()
246 	kfree(mux);  in clk_unregister_mux()
252 	struct clk_mux *mux;  in clk_hw_unregister_mux()  local
254 	mux = to_clk_mux(hw);  in clk_hw_unregister_mux()
257 	kfree(mux);  in clk_hw_unregister_mux()