1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * Maxime Ripard <maxime.ripard@free-electrons.com>
9 #include <linux/clk-provider.h>
28 	struct sun4i_dclk *dclk = hw_to_dclk(hw);  in sun4i_dclk_disable()  local
30 	regmap_update_bits(dclk->regmap, SUN4I_TCON0_DCLK_REG,  in sun4i_dclk_disable()
36 	struct sun4i_dclk *dclk = hw_to_dclk(hw);  in sun4i_dclk_enable()  local
38 	return regmap_update_bits(dclk->regmap, SUN4I_TCON0_DCLK_REG,  in sun4i_dclk_enable()
45 	struct sun4i_dclk *dclk = hw_to_dclk(hw);  in sun4i_dclk_is_enabled()  local
48 	regmap_read(dclk->regmap, SUN4I_TCON0_DCLK_REG, &val);  in sun4i_dclk_is_enabled()
56 	struct sun4i_dclk *dclk = hw_to_dclk(hw);  in sun4i_dclk_recalc_rate()  local
59 	regmap_read(dclk->regmap, SUN4I_TCON0_DCLK_REG, &val);  in sun4i_dclk_recalc_rate()
62 	val &= (1 << SUN4I_TCON0_DCLK_DIV_WIDTH) - 1;  in sun4i_dclk_recalc_rate()
73 	struct sun4i_dclk *dclk = hw_to_dclk(hw);  in sun4i_dclk_round_rate()  local
74 	struct sun4i_tcon *tcon = dclk->tcon;  in sun4i_dclk_round_rate()
79 	for (i = tcon->dclk_min_div; i <= tcon->dclk_max_div; i++) {  in sun4i_dclk_round_rate()
102 		if (abs(rate - rounded / i) <  in sun4i_dclk_round_rate()
103 		    abs(rate - best_parent / best_div)) {  in sun4i_dclk_round_rate()
118 	struct sun4i_dclk *dclk = hw_to_dclk(hw);  in sun4i_dclk_set_rate()  local
119 	u8 div = parent_rate / rate;  in sun4i_dclk_set_rate()  local
121 	return regmap_update_bits(dclk->regmap, SUN4I_TCON0_DCLK_REG,  in sun4i_dclk_set_rate()
122 				  GENMASK(6, 0), div);  in sun4i_dclk_set_rate()
127 	struct sun4i_dclk *dclk = hw_to_dclk(hw);  in sun4i_dclk_get_phase()  local
130 	regmap_read(dclk->regmap, SUN4I_TCON0_IO_POL_REG, &val);  in sun4i_dclk_get_phase()
140 	struct sun4i_dclk *dclk = hw_to_dclk(hw);  in sun4i_dclk_set_phase()  local
145 	regmap_update_bits(dclk->regmap, SUN4I_TCON0_IO_POL_REG,  in sun4i_dclk_set_phase()
169 	struct sun4i_dclk *dclk;  in sun4i_dclk_create()  local
172 	parent_name = __clk_get_name(tcon->sclk0);  in sun4i_dclk_create()
173 	ret = of_property_read_string_index(dev->of_node,  in sun4i_dclk_create()
174 					    "clock-output-names", 0,  in sun4i_dclk_create()
179 	dclk = devm_kzalloc(dev, sizeof(*dclk), GFP_KERNEL);  in sun4i_dclk_create()
180 	if (!dclk)  in sun4i_dclk_create()
181 		return -ENOMEM;  in sun4i_dclk_create()
182 	dclk->tcon = tcon;  in sun4i_dclk_create()
190 	dclk->regmap = tcon->regs;  in sun4i_dclk_create()
191 	dclk->hw.init = &init;  in sun4i_dclk_create()
193 	tcon->dclk = clk_register(dev, &dclk->hw);  in sun4i_dclk_create()
194 	if (IS_ERR(tcon->dclk))  in sun4i_dclk_create()
195 		return PTR_ERR(tcon->dclk);  in sun4i_dclk_create()
203 	clk_unregister(tcon->dclk);  in sun4i_dclk_free()