1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * Maxime Ripard <maxime.ripard@free-electrons.com>
9 #include <linux/clk-provider.h>
49 			    (rate - tmp_rate) < (rate - best_rate)) {  in sun4i_tmds_calc_divider()
72 	unsigned long rate = req->rate;  in sun4i_tmds_determine_rate()
88 			for (j = tmds->div_offset ?: 1;  in sun4i_tmds_determine_rate()
89 			     j < (16 + tmds->div_offset); j++) {  in sun4i_tmds_determine_rate()
103 				    abs(rate - rounded / i / j) <  in sun4i_tmds_determine_rate()
104 				    abs(rate - best_parent / best_half /  in sun4i_tmds_determine_rate()
115 		return -EINVAL;  in sun4i_tmds_determine_rate()
118 	req->rate = best_parent / best_half / best_div;  in sun4i_tmds_determine_rate()
119 	req->best_parent_rate = best_parent;  in sun4i_tmds_determine_rate()
120 	req->best_parent_hw = parent;  in sun4i_tmds_determine_rate()
129 	u32 reg;  in sun4i_tmds_recalc_rate()  local
131 	reg = readl(tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);  in sun4i_tmds_recalc_rate()
132 	if (reg & SUN4I_HDMI_PAD_CTRL1_HALVE_CLK)  in sun4i_tmds_recalc_rate()
135 	reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);  in sun4i_tmds_recalc_rate()
136 	reg = ((reg >> 4) & 0xf) + tmds->div_offset;  in sun4i_tmds_recalc_rate()
137 	if (!reg)  in sun4i_tmds_recalc_rate()
138 		reg = 1;  in sun4i_tmds_recalc_rate()
140 	return parent_rate / reg;  in sun4i_tmds_recalc_rate()
148 	u32 reg;  in sun4i_tmds_set_rate()  local
151 	sun4i_tmds_calc_divider(rate, parent_rate, tmds->div_offset,  in sun4i_tmds_set_rate()
154 	reg = readl(tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);  in sun4i_tmds_set_rate()
155 	reg &= ~SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;  in sun4i_tmds_set_rate()
157 		reg |= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;  in sun4i_tmds_set_rate()
158 	writel(reg, tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);  in sun4i_tmds_set_rate()
160 	reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);  in sun4i_tmds_set_rate()
161 	reg &= ~SUN4I_HDMI_PLL_CTRL_DIV_MASK;  in sun4i_tmds_set_rate()
162 	writel(reg | SUN4I_HDMI_PLL_CTRL_DIV(div - tmds->div_offset),  in sun4i_tmds_set_rate()
163 	       tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);  in sun4i_tmds_set_rate()
171 	u32 reg;  in sun4i_tmds_get_parent()  local
173 	reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_DBG0_REG);  in sun4i_tmds_get_parent()
174 	return ((reg & SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_MASK) >>  in sun4i_tmds_get_parent()
181 	u32 reg;  in sun4i_tmds_set_parent()  local
184 		return -EINVAL;  in sun4i_tmds_set_parent()
186 	reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_DBG0_REG);  in sun4i_tmds_set_parent()
187 	reg &= ~SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_MASK;  in sun4i_tmds_set_parent()
188 	writel(reg | SUN4I_HDMI_PLL_DBG0_TMDS_PARENT(index),  in sun4i_tmds_set_parent()
189 	       tmds->hdmi->base + SUN4I_HDMI_PLL_DBG0_REG);  in sun4i_tmds_set_parent()
205 	struct clk_init_data init;  in sun4i_tmds_create()  local
209 	parents[0] = __clk_get_name(hdmi->pll0_clk);  in sun4i_tmds_create()
211 		return -ENODEV;  in sun4i_tmds_create()
213 	parents[1] = __clk_get_name(hdmi->pll1_clk);  in sun4i_tmds_create()
215 		return -ENODEV;  in sun4i_tmds_create()
217 	tmds = devm_kzalloc(hdmi->dev, sizeof(*tmds), GFP_KERNEL);  in sun4i_tmds_create()
219 		return -ENOMEM;  in sun4i_tmds_create()
221 	init.name = "hdmi-tmds";  in sun4i_tmds_create()
222 	init.ops = &sun4i_tmds_ops;  in sun4i_tmds_create()
223 	init.parent_names = parents;  in sun4i_tmds_create()
224 	init.num_parents = 2;  in sun4i_tmds_create()
225 	init.flags = CLK_SET_RATE_PARENT;  in sun4i_tmds_create()
227 	tmds->hdmi = hdmi;  in sun4i_tmds_create()
228 	tmds->hw.init = &init;  in sun4i_tmds_create()
229 	tmds->div_offset = hdmi->variant->tmds_clk_div_offset;  in sun4i_tmds_create()
231 	hdmi->tmds_clk = devm_clk_register(hdmi->dev, &tmds->hw);  in sun4i_tmds_create()
232 	if (IS_ERR(hdmi->tmds_clk))  in sun4i_tmds_create()
233 		return PTR_ERR(hdmi->tmds_clk);  in sun4i_tmds_create()