1 // SPDX-License-Identifier: GPL-2.0
3  * CS2000  --  CIRRUS LOGIC Fractional-N Clock Synthesizer & Clock Multiplier
8 #include <linux/clk-provider.h>
25 #define Ratio_Val(x, nth)	((x >> (24 - (8 * nth))) & 0xFF)
26 #define Val_Ratio(x, nth)	((x & 0xFF) << (24 - (8 * nth)))
71 #define priv_to_client(priv)	(priv->client)
72 #define priv_to_dev(priv)	(&(priv_to_client(priv)->dev))
119 	{ .compatible = "cirrus,cs2000-cp", },
125 	{ "cs2000-cp", },
134 	ret = regmap_update_bits(priv->regmap, DEVICE_CFG1, ENDEV1,  in cs2000_enable_dev_config()
139 	ret = regmap_update_bits(priv->regmap, GLOBAL_CFG,  ENDEV2,  in cs2000_enable_dev_config()
144 	ret = regmap_update_bits(priv->regmap, FUNC_CFG1, CLKSKIPEN,  in cs2000_enable_dev_config()
145 				 (enable && priv->clk_skip) ? CLKSKIPEN : 0);  in cs2000_enable_dev_config()
164 		return -EINVAL;  in cs2000_ref_clk_bound_rate()
166 	return regmap_update_bits(priv->regmap, FUNC_CFG1,  in cs2000_ref_clk_bound_rate()
178 		ret = regmap_read(priv->regmap, DEVICE_CTRL, &val);  in cs2000_wait_pll_lock()
188 	return -ETIMEDOUT;  in cs2000_wait_pll_lock()
194 	return regmap_update_bits(priv->regmap, DEVICE_CTRL,  in cs2000_clk_out_enable()
241 		return -EINVAL;  in cs2000_ratio_set()
243 	val = cs2000_rate_to_ratio(rate_in, rate_out, priv->lf_ratio);  in cs2000_ratio_set()
245 		ret = regmap_write(priv->regmap,  in cs2000_ratio_set()
263 		ret = regmap_read(priv->regmap, Ratio_Add(ch, i), &tmp);  in cs2000_ratio_get()
279 		return -EINVAL;  in cs2000_ratio_select()
281 	ret = regmap_update_bits(priv->regmap, DEVICE_CFG1, RSEL_MASK, RSEL(ch));  in cs2000_ratio_select()
285 	fracnsrc = priv->dynamic_mode ? FRACNSRC_DYNAMIC : FRACNSRC_STATIC;  in cs2000_ratio_select()
287 	ret = regmap_update_bits(priv->regmap, DEVICE_CFG2,  in cs2000_ratio_select()
305 	return cs2000_ratio_to_rate(ratio, parent_rate, priv->lf_ratio);  in cs2000_recalc_rate()
314 	ratio = cs2000_rate_to_ratio(*parent_rate, rate, priv->lf_ratio);  in cs2000_round_rate()
316 	return cs2000_ratio_to_rate(ratio, *parent_rate, priv->lf_ratio);  in cs2000_round_rate()
326 	 * | It is recommended that the 12.20 High-Resolution format be  in cs2000_select_ratio_mode()
334 	priv->lf_ratio = priv->dynamic_mode && ((rate / parent_rate) > 4096);  in cs2000_select_ratio_mode()
336 	return regmap_update_bits(priv->regmap, FUNC_CFG2, LFRATIO_MASK,  in cs2000_select_ratio_mode()
337 				  priv->lf_ratio ? LFRATIO_20_12 : LFRATIO_12_20);  in cs2000_select_ratio_mode()
346 	ret = regmap_update_bits(priv->regmap, GLOBAL_CFG, FREEZE, FREEZE);  in __cs2000_set_rate()
362 	ret = regmap_update_bits(priv->regmap, GLOBAL_CFG, FREEZE, 0);  in __cs2000_set_rate()
366 	priv->saved_rate	= rate;  in __cs2000_set_rate()
367 	priv->saved_parent_rate	= parent_rate;  in __cs2000_set_rate()
386 				 priv->saved_rate,  in cs2000_set_saved_rate()
387 				 priv->saved_parent_rate);  in cs2000_set_saved_rate()
427 	return priv->dynamic_mode ? CLK_IN : REF_CLK;  in cs2000_get_parent()
447 		return -EPROBE_DEFER;  in cs2000_clk_get()
452 		return -EPROBE_DEFER;  in cs2000_clk_get()
454 	priv->clk_in	= clk_in;  in cs2000_clk_get()
455 	priv->ref_clk	= ref_clk;  in cs2000_clk_get()
463 	struct device_node *np = dev->of_node;  in cs2000_clk_register()
465 	const char *name = np->name;  in cs2000_clk_register()
472 	of_property_read_string(np, "clock-output-names", &name);  in cs2000_clk_register()
474 	priv->dynamic_mode = of_property_read_bool(np, "cirrus,dynamic-mode");  in cs2000_clk_register()
476 		 priv->dynamic_mode ? "dynamic" : "static");  in cs2000_clk_register()
478 	of_property_read_u32(np, "cirrus,aux-output-source", &aux_out);  in cs2000_clk_register()
479 	ret = regmap_update_bits(priv->regmap, DEVICE_CFG1,  in cs2000_clk_register()
484 	priv->clk_skip = of_property_read_bool(np, "cirrus,clock-skip");  in cs2000_clk_register()
486 	ref_clk_rate = clk_get_rate(priv->ref_clk);  in cs2000_clk_register()
491 	if (priv->dynamic_mode) {  in cs2000_clk_register()
492 		/* Default to low-frequency mode to allow for large ratios */  in cs2000_clk_register()
493 		priv->lf_ratio = true;  in cs2000_clk_register()
505 	parent_names[CLK_IN]	= __clk_get_name(priv->clk_in);  in cs2000_clk_register()
506 	parent_names[REF_CLK]	= __clk_get_name(priv->ref_clk);  in cs2000_clk_register()
514 	priv->hw.init = &init;  in cs2000_clk_register()
516 	ret = clk_hw_register(dev, &priv->hw);  in cs2000_clk_register()
520 	ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &priv->hw);  in cs2000_clk_register()
522 		clk_hw_unregister(&priv->hw);  in cs2000_clk_register()
536 	ret = regmap_read(priv->regmap, DEVICE_ID, &val);  in cs2000_version_print()
540 	/* CS2000 should be 0x0 */  in cs2000_version_print()
542 		return -EIO;  in cs2000_version_print()
552 		return -EIO;  in cs2000_version_print()
555 	dev_info(dev, "revision - %s\n", revision);  in cs2000_version_print()
564 	struct device_node *np = dev->of_node;  in cs2000_remove()
568 	clk_hw_unregister(&priv->hw);  in cs2000_remove()
574 	struct device *dev = &client->dev;  in cs2000_probe()
579 		return -ENOMEM;  in cs2000_probe()
581 	priv->client = client;  in cs2000_probe()
584 	priv->regmap = devm_regmap_init_i2c(client, &cs2000_regmap_config);  in cs2000_probe()
585 	if (IS_ERR(priv->regmap))  in cs2000_probe()
586 		return PTR_ERR(priv->regmap);  in cs2000_probe()
621 		.name = "cs2000-cp",
632 MODULE_DESCRIPTION("CS2000-CP driver");