1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2016 Socionext Inc. 4 * Author: Masahiro Yamada <yamada.masahiro@socionext.com> 5 */ 6 7 #include <linux/clk-provider.h> 8 #include <linux/init.h> 9 #include <linux/mfd/syscon.h> 10 #include <linux/of.h> 11 #include <linux/of_device.h> 12 #include <linux/platform_device.h> 13 14 #include "clk-uniphier.h" 15 16 static struct clk_hw *uniphier_clk_register(struct device *dev, 17 struct regmap *regmap, 18 const struct uniphier_clk_data *data) 19 { 20 switch (data->type) { 21 case UNIPHIER_CLK_TYPE_CPUGEAR: 22 return uniphier_clk_register_cpugear(dev, regmap, data->name, 23 &data->data.cpugear); 24 case UNIPHIER_CLK_TYPE_FIXED_FACTOR: 25 return uniphier_clk_register_fixed_factor(dev, data->name, 26 &data->data.factor); 27 case UNIPHIER_CLK_TYPE_FIXED_RATE: 28 return uniphier_clk_register_fixed_rate(dev, data->name, 29 &data->data.rate); 30 case UNIPHIER_CLK_TYPE_GATE: 31 return uniphier_clk_register_gate(dev, regmap, data->name, 32 &data->data.gate); 33 case UNIPHIER_CLK_TYPE_MUX: 34 return uniphier_clk_register_mux(dev, regmap, data->name, 35 &data->data.mux); 36 default: 37 dev_err(dev, "unsupported clock type\n"); 38 return ERR_PTR(-EINVAL); 39 } 40 } 41 42 static int uniphier_clk_probe(struct platform_device *pdev) 43 { 44 struct device *dev = &pdev->dev; 45 struct clk_hw_onecell_data *hw_data; 46 const struct uniphier_clk_data *p, *data; 47 struct regmap *regmap; 48 struct device_node *parent; 49 int clk_num = 0; 50 51 data = of_device_get_match_data(dev); 52 if (WARN_ON(!data)) 53 return -EINVAL; 54 55 parent = of_get_parent(dev->of_node); /* parent should be syscon node */ 56 regmap = syscon_node_to_regmap(parent); 57 of_node_put(parent); 58 if (IS_ERR(regmap)) { 59 dev_err(dev, "failed to get regmap (error %ld)\n", 60 PTR_ERR(regmap)); 61 return PTR_ERR(regmap); 62 } 63 64 for (p = data; p->name; p++) 65 clk_num = max(clk_num, p->idx + 1); 66 67 hw_data = devm_kzalloc(dev, 68 sizeof(*hw_data) + clk_num * sizeof(struct clk_hw *), 69 GFP_KERNEL); 70 if (!hw_data) 71 return -ENOMEM; 72 73 hw_data->num = clk_num; 74 75 /* avoid returning NULL for unused idx */ 76 while (--clk_num >= 0) 77 hw_data->hws[clk_num] = ERR_PTR(-EINVAL); 78 79 for (p = data; p->name; p++) { 80 struct clk_hw *hw; 81 82 dev_dbg(dev, "register %s (index=%d)\n", p->name, p->idx); 83 hw = uniphier_clk_register(dev, regmap, p); 84 if (WARN(IS_ERR(hw), "failed to register %s", p->name)) 85 continue; 86 87 if (p->idx >= 0) 88 hw_data->hws[p->idx] = hw; 89 } 90 91 return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get, 92 hw_data); 93 } 94 95 static int uniphier_clk_remove(struct platform_device *pdev) 96 { 97 of_clk_del_provider(pdev->dev.of_node); 98 99 return 0; 100 } 101 102 static const struct of_device_id uniphier_clk_match[] = { 103 /* System clock */ 104 { 105 .compatible = "socionext,uniphier-ld4-clock", 106 .data = uniphier_ld4_sys_clk_data, 107 }, 108 { 109 .compatible = "socionext,uniphier-pro4-clock", 110 .data = uniphier_pro4_sys_clk_data, 111 }, 112 { 113 .compatible = "socionext,uniphier-sld8-clock", 114 .data = uniphier_sld8_sys_clk_data, 115 }, 116 { 117 .compatible = "socionext,uniphier-pro5-clock", 118 .data = uniphier_pro5_sys_clk_data, 119 }, 120 { 121 .compatible = "socionext,uniphier-pxs2-clock", 122 .data = uniphier_pxs2_sys_clk_data, 123 }, 124 { 125 .compatible = "socionext,uniphier-ld11-clock", 126 .data = uniphier_ld11_sys_clk_data, 127 }, 128 { 129 .compatible = "socionext,uniphier-ld20-clock", 130 .data = uniphier_ld20_sys_clk_data, 131 }, 132 { 133 .compatible = "socionext,uniphier-pxs3-clock", 134 .data = uniphier_pxs3_sys_clk_data, 135 }, 136 /* Media I/O clock, SD clock */ 137 { 138 .compatible = "socionext,uniphier-ld4-mio-clock", 139 .data = uniphier_ld4_mio_clk_data, 140 }, 141 { 142 .compatible = "socionext,uniphier-pro4-mio-clock", 143 .data = uniphier_ld4_mio_clk_data, 144 }, 145 { 146 .compatible = "socionext,uniphier-sld8-mio-clock", 147 .data = uniphier_ld4_mio_clk_data, 148 }, 149 { 150 .compatible = "socionext,uniphier-pro5-sd-clock", 151 .data = uniphier_pro5_sd_clk_data, 152 }, 153 { 154 .compatible = "socionext,uniphier-pxs2-sd-clock", 155 .data = uniphier_pro5_sd_clk_data, 156 }, 157 { 158 .compatible = "socionext,uniphier-ld11-mio-clock", 159 .data = uniphier_ld4_mio_clk_data, 160 }, 161 { 162 .compatible = "socionext,uniphier-ld20-sd-clock", 163 .data = uniphier_pro5_sd_clk_data, 164 }, 165 { 166 .compatible = "socionext,uniphier-pxs3-sd-clock", 167 .data = uniphier_pro5_sd_clk_data, 168 }, 169 /* Peripheral clock */ 170 { 171 .compatible = "socionext,uniphier-ld4-peri-clock", 172 .data = uniphier_ld4_peri_clk_data, 173 }, 174 { 175 .compatible = "socionext,uniphier-pro4-peri-clock", 176 .data = uniphier_pro4_peri_clk_data, 177 }, 178 { 179 .compatible = "socionext,uniphier-sld8-peri-clock", 180 .data = uniphier_ld4_peri_clk_data, 181 }, 182 { 183 .compatible = "socionext,uniphier-pro5-peri-clock", 184 .data = uniphier_pro4_peri_clk_data, 185 }, 186 { 187 .compatible = "socionext,uniphier-pxs2-peri-clock", 188 .data = uniphier_pro4_peri_clk_data, 189 }, 190 { 191 .compatible = "socionext,uniphier-ld11-peri-clock", 192 .data = uniphier_pro4_peri_clk_data, 193 }, 194 { 195 .compatible = "socionext,uniphier-ld20-peri-clock", 196 .data = uniphier_pro4_peri_clk_data, 197 }, 198 { 199 .compatible = "socionext,uniphier-pxs3-peri-clock", 200 .data = uniphier_pro4_peri_clk_data, 201 }, 202 { /* sentinel */ } 203 }; 204 205 static struct platform_driver uniphier_clk_driver = { 206 .probe = uniphier_clk_probe, 207 .remove = uniphier_clk_remove, 208 .driver = { 209 .name = "uniphier-clk", 210 .of_match_table = uniphier_clk_match, 211 }, 212 }; 213 builtin_platform_driver(uniphier_clk_driver); 214