1 // SPDX-License-Identifier: GPL-2.0-only
3  * Clk driver for NXP LPC18xx/43xx Configuration Registers (CREG)
8 #include <linux/clk-provider.h>
11 #include <linux/mfd/syscon.h>
50 	ret = regmap_update_bits(creg->reg, LPC18XX_CREG_CREG0,  in clk_creg_32k_prepare()
67 	regmap_update_bits(creg->reg, LPC18XX_CREG_CREG0,  in clk_creg_32k_unprepare()
77 	regmap_read(creg->reg, LPC18XX_CREG_CREG0, &reg);  in clk_creg_32k_is_prepared()
93 	return regmap_update_bits(creg->reg, LPC18XX_CREG_CREG0,  in clk_creg_enable()
94 				  creg->en_mask, creg->en_mask);  in clk_creg_enable()
101 	regmap_update_bits(creg->reg, LPC18XX_CREG_CREG0,  in clk_creg_disable()
102 			   creg->en_mask, 0);  in clk_creg_disable()
110 	regmap_read(creg->reg, LPC18XX_CREG_CREG0, &reg);  in clk_creg_is_enabled()
112 	return !!(reg & creg->en_mask);  in clk_creg_is_enabled()
136 static struct clk *clk_register_creg_clk(struct device *dev,  in clk_register_creg_clk()
139 					 struct regmap *syscon)  in clk_register_creg_clk()  argument
143 	init.ops = creg_clk->ops;  in clk_register_creg_clk()
144 	init.name = creg_clk->name;  in clk_register_creg_clk()
149 	creg_clk->reg = syscon;  in clk_register_creg_clk()
150 	creg_clk->hw.init = &init;  in clk_register_creg_clk()
153 		return devm_clk_register(dev, &creg_clk->hw);  in clk_register_creg_clk()
155 	return clk_register(NULL, &creg_clk->hw);  in clk_register_creg_clk()
158 static struct clk *clk_creg_early[CREG_CLK_MAX];
167 	struct regmap *syscon;  in lpc18xx_creg_clk_init()  local
169 	syscon = syscon_node_to_regmap(np->parent);  in lpc18xx_creg_clk_init()
170 	if (IS_ERR(syscon)) {  in lpc18xx_creg_clk_init()
171 		pr_err("%s: syscon lookup failed\n", __func__);  in lpc18xx_creg_clk_init()
179 				      &clk_32khz_parent, syscon);  in lpc18xx_creg_clk_init()
180 	clk_creg_early[CREG_CLK_1KHZ] = ERR_PTR(-EPROBE_DEFER);  in lpc18xx_creg_clk_init()
184 CLK_OF_DECLARE_DRIVER(lpc18xx_creg_clk, "nxp,lpc1850-creg-clk",
187 static struct clk *clk_creg[CREG_CLK_MAX];
195 	struct device_node *np = pdev->dev.of_node;  in lpc18xx_creg_clk_probe()
196 	struct regmap *syscon;  in lpc18xx_creg_clk_probe()  local
198 	syscon = syscon_node_to_regmap(np->parent);  in lpc18xx_creg_clk_probe()
199 	if (IS_ERR(syscon)) {  in lpc18xx_creg_clk_probe()
200 		dev_err(&pdev->dev, "syscon lookup failed\n");  in lpc18xx_creg_clk_probe()
201 		return PTR_ERR(syscon);  in lpc18xx_creg_clk_probe()
208 				      syscon);  in lpc18xx_creg_clk_probe()
214 	{ .compatible = "nxp,lpc1850-creg-clk" },
221 		.name = "lpc18xx-creg-clk",