1 // SPDX-License-Identifier: GPL-2.0
5  * Simple HiSilicon phase clock implementation.
14 #include "clk.h"
30 static int hisi_phase_regval_to_degrees(struct clk_hisi_phase *phase,  in hisi_phase_regval_to_degrees()  argument
35 	for (i = 0; i < phase->phase_num; i++)  in hisi_phase_regval_to_degrees()
36 		if (phase->phase_regvals[i] == regval)  in hisi_phase_regval_to_degrees()
37 			return phase->phase_degrees[i];  in hisi_phase_regval_to_degrees()
39 	return -EINVAL;  in hisi_phase_regval_to_degrees()
44 	struct clk_hisi_phase *phase = to_clk_hisi_phase(hw);  in hisi_clk_get_phase()  local
47 	regval = readl(phase->reg);  in hisi_clk_get_phase()
48 	regval = (regval & phase->mask) >> phase->shift;  in hisi_clk_get_phase()
50 	return hisi_phase_regval_to_degrees(phase, regval);  in hisi_clk_get_phase()
53 static int hisi_phase_degrees_to_regval(struct clk_hisi_phase *phase,  in hisi_phase_degrees_to_regval()  argument
58 	for (i = 0; i < phase->phase_num; i++)  in hisi_phase_degrees_to_regval()
59 		if (phase->phase_degrees[i] == degrees)  in hisi_phase_degrees_to_regval()
60 			return phase->phase_regvals[i];  in hisi_phase_degrees_to_regval()
62 	return -EINVAL;  in hisi_phase_degrees_to_regval()
67 	struct clk_hisi_phase *phase = to_clk_hisi_phase(hw);  in hisi_clk_set_phase()  local
72 	regval = hisi_phase_degrees_to_regval(phase, degrees);  in hisi_clk_set_phase()
76 	spin_lock_irqsave(phase->lock, flags);  in hisi_clk_set_phase()
78 	val = readl(phase->reg);  in hisi_clk_set_phase()
79 	val &= ~phase->mask;  in hisi_clk_set_phase()
80 	val |= regval << phase->shift;  in hisi_clk_set_phase()
81 	writel(val, phase->reg);  in hisi_clk_set_phase()
83 	spin_unlock_irqrestore(phase->lock, flags);  in hisi_clk_set_phase()
93 struct clk *clk_register_hisi_phase(struct device *dev,  in clk_register_hisi_phase()
97 	struct clk_hisi_phase *phase;  in clk_register_hisi_phase()  local
100 	phase = devm_kzalloc(dev, sizeof(struct clk_hisi_phase), GFP_KERNEL);  in clk_register_hisi_phase()
101 	if (!phase)  in clk_register_hisi_phase()
102 		return ERR_PTR(-ENOMEM);  in clk_register_hisi_phase()
104 	init.name = clks->name;  in clk_register_hisi_phase()
106 	init.flags = clks->flags;  in clk_register_hisi_phase()
107 	init.parent_names = clks->parent_names ? &clks->parent_names : NULL;  in clk_register_hisi_phase()
108 	init.num_parents = clks->parent_names ? 1 : 0;  in clk_register_hisi_phase()
110 	phase->reg = base + clks->offset;  in clk_register_hisi_phase()
111 	phase->shift = clks->shift;  in clk_register_hisi_phase()
112 	phase->mask = (BIT(clks->width) - 1) << clks->shift;  in clk_register_hisi_phase()
113 	phase->lock = lock;  in clk_register_hisi_phase()
114 	phase->phase_degrees = clks->phase_degrees;  in clk_register_hisi_phase()
115 	phase->phase_regvals = clks->phase_regvals;  in clk_register_hisi_phase()
116 	phase->phase_num = clks->phase_num;  in clk_register_hisi_phase()
117 	phase->hw.init = &init;  in clk_register_hisi_phase()
119 	return devm_clk_register(dev, &phase->hw);  in clk_register_hisi_phase()