1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * StarFive JH7110 Video-Output Clock Driver 4 * 5 * Copyright (C) 2022-2023 StarFive Technology Co., Ltd. 6 */ 7 8 #include <linux/clk.h> 9 #include <linux/clk-provider.h> 10 #include <linux/io.h> 11 #include <linux/platform_device.h> 12 #include <linux/pm_runtime.h> 13 #include <linux/reset.h> 14 15 #include <dt-bindings/clock/starfive,jh7110-crg.h> 16 17 #include "clk-starfive-jh7110.h" 18 19 /* external clocks */ 20 #define JH7110_VOUTCLK_VOUT_SRC (JH7110_VOUTCLK_END + 0) 21 #define JH7110_VOUTCLK_VOUT_TOP_AHB (JH7110_VOUTCLK_END + 1) 22 #define JH7110_VOUTCLK_VOUT_TOP_AXI (JH7110_VOUTCLK_END + 2) 23 #define JH7110_VOUTCLK_VOUT_TOP_HDMITX0_MCLK (JH7110_VOUTCLK_END + 3) 24 #define JH7110_VOUTCLK_I2STX0_BCLK (JH7110_VOUTCLK_END + 4) 25 #define JH7110_VOUTCLK_HDMITX0_PIXELCLK (JH7110_VOUTCLK_END + 5) 26 #define JH7110_VOUTCLK_EXT_END (JH7110_VOUTCLK_END + 6) 27 28 static struct clk_bulk_data jh7110_vout_top_clks[] = { 29 { .id = "vout_src" }, 30 { .id = "vout_top_ahb" } 31 }; 32 33 static const struct jh71x0_clk_data jh7110_voutclk_data[] = { 34 /* divider */ 35 JH71X0__DIV(JH7110_VOUTCLK_APB, "apb", 8, JH7110_VOUTCLK_VOUT_TOP_AHB), 36 JH71X0__DIV(JH7110_VOUTCLK_DC8200_PIX, "dc8200_pix", 63, JH7110_VOUTCLK_VOUT_SRC), 37 JH71X0__DIV(JH7110_VOUTCLK_DSI_SYS, "dsi_sys", 31, JH7110_VOUTCLK_VOUT_SRC), 38 JH71X0__DIV(JH7110_VOUTCLK_TX_ESC, "tx_esc", 31, JH7110_VOUTCLK_VOUT_TOP_AHB), 39 /* dc8200 */ 40 JH71X0_GATE(JH7110_VOUTCLK_DC8200_AXI, "dc8200_axi", 0, JH7110_VOUTCLK_VOUT_TOP_AXI), 41 JH71X0_GATE(JH7110_VOUTCLK_DC8200_CORE, "dc8200_core", 0, JH7110_VOUTCLK_VOUT_TOP_AXI), 42 JH71X0_GATE(JH7110_VOUTCLK_DC8200_AHB, "dc8200_ahb", 0, JH7110_VOUTCLK_VOUT_TOP_AHB), 43 JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX0, "dc8200_pix0", 0, 2, 44 JH7110_VOUTCLK_DC8200_PIX, 45 JH7110_VOUTCLK_HDMITX0_PIXELCLK), 46 JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX1, "dc8200_pix1", 0, 2, 47 JH7110_VOUTCLK_DC8200_PIX, 48 JH7110_VOUTCLK_HDMITX0_PIXELCLK), 49 /* LCD */ 50 JH71X0_GMUX(JH7110_VOUTCLK_DOM_VOUT_TOP_LCD, "dom_vout_top_lcd", 0, 2, 51 JH7110_VOUTCLK_DC8200_PIX0, 52 JH7110_VOUTCLK_DC8200_PIX1), 53 /* dsiTx */ 54 JH71X0_GATE(JH7110_VOUTCLK_DSITX_APB, "dsiTx_apb", 0, JH7110_VOUTCLK_DSI_SYS), 55 JH71X0_GATE(JH7110_VOUTCLK_DSITX_SYS, "dsiTx_sys", 0, JH7110_VOUTCLK_DSI_SYS), 56 JH71X0_GMUX(JH7110_VOUTCLK_DSITX_DPI, "dsiTx_dpi", 0, 2, 57 JH7110_VOUTCLK_DC8200_PIX, 58 JH7110_VOUTCLK_HDMITX0_PIXELCLK), 59 JH71X0_GATE(JH7110_VOUTCLK_DSITX_TXESC, "dsiTx_txesc", 0, JH7110_VOUTCLK_TX_ESC), 60 /* mipitx DPHY */ 61 JH71X0_GATE(JH7110_VOUTCLK_MIPITX_DPHY_TXESC, "mipitx_dphy_txesc", 0, 62 JH7110_VOUTCLK_TX_ESC), 63 /* hdmi */ 64 JH71X0_GATE(JH7110_VOUTCLK_HDMI_TX_MCLK, "hdmi_tx_mclk", 0, 65 JH7110_VOUTCLK_VOUT_TOP_HDMITX0_MCLK), 66 JH71X0_GATE(JH7110_VOUTCLK_HDMI_TX_BCLK, "hdmi_tx_bclk", 0, 67 JH7110_VOUTCLK_I2STX0_BCLK), 68 JH71X0_GATE(JH7110_VOUTCLK_HDMI_TX_SYS, "hdmi_tx_sys", 0, JH7110_VOUTCLK_APB), 69 }; 70 71 static int jh7110_vout_top_rst_init(struct jh71x0_clk_priv *priv) 72 { 73 struct reset_control *top_rst; 74 75 /* The reset should be shared and other Vout modules will use its. */ 76 top_rst = devm_reset_control_get_shared(priv->dev, NULL); 77 if (IS_ERR(top_rst)) 78 return dev_err_probe(priv->dev, PTR_ERR(top_rst), "failed to get top reset\n"); 79 80 return reset_control_deassert(top_rst); 81 } 82 83 static struct clk_hw *jh7110_voutclk_get(struct of_phandle_args *clkspec, void *data) 84 { 85 struct jh71x0_clk_priv *priv = data; 86 unsigned int idx = clkspec->args[0]; 87 88 if (idx < JH7110_VOUTCLK_END) 89 return &priv->reg[idx].hw; 90 91 return ERR_PTR(-EINVAL); 92 } 93 94 #ifdef CONFIG_PM 95 static int jh7110_voutcrg_suspend(struct device *dev) 96 { 97 struct jh7110_top_sysclk *top = dev_get_drvdata(dev); 98 99 clk_bulk_disable_unprepare(top->top_clks_num, top->top_clks); 100 101 return 0; 102 } 103 104 static int jh7110_voutcrg_resume(struct device *dev) 105 { 106 struct jh7110_top_sysclk *top = dev_get_drvdata(dev); 107 108 return clk_bulk_prepare_enable(top->top_clks_num, top->top_clks); 109 } 110 111 static const struct dev_pm_ops jh7110_voutcrg_pm_ops = { 112 RUNTIME_PM_OPS(jh7110_voutcrg_suspend, jh7110_voutcrg_resume, NULL) 113 }; 114 #endif 115 116 static int jh7110_voutcrg_probe(struct platform_device *pdev) 117 { 118 struct jh71x0_clk_priv *priv; 119 struct jh7110_top_sysclk *top; 120 unsigned int idx; 121 int ret; 122 123 priv = devm_kzalloc(&pdev->dev, 124 struct_size(priv, reg, JH7110_VOUTCLK_END), 125 GFP_KERNEL); 126 if (!priv) 127 return -ENOMEM; 128 129 top = devm_kzalloc(&pdev->dev, sizeof(*top), GFP_KERNEL); 130 if (!top) 131 return -ENOMEM; 132 133 spin_lock_init(&priv->rmw_lock); 134 priv->dev = &pdev->dev; 135 priv->base = devm_platform_ioremap_resource(pdev, 0); 136 if (IS_ERR(priv->base)) 137 return PTR_ERR(priv->base); 138 139 top->top_clks = jh7110_vout_top_clks; 140 top->top_clks_num = ARRAY_SIZE(jh7110_vout_top_clks); 141 ret = devm_clk_bulk_get(priv->dev, top->top_clks_num, top->top_clks); 142 if (ret) 143 return dev_err_probe(priv->dev, ret, "failed to get top clocks\n"); 144 dev_set_drvdata(priv->dev, top); 145 146 /* enable power domain and clocks */ 147 pm_runtime_enable(priv->dev); 148 ret = pm_runtime_resume_and_get(priv->dev); 149 if (ret < 0) 150 return dev_err_probe(priv->dev, ret, "failed to turn on power\n"); 151 152 ret = jh7110_vout_top_rst_init(priv); 153 if (ret) 154 goto err_exit; 155 156 for (idx = 0; idx < JH7110_VOUTCLK_END; idx++) { 157 u32 max = jh7110_voutclk_data[idx].max; 158 struct clk_parent_data parents[4] = {}; 159 struct clk_init_data init = { 160 .name = jh7110_voutclk_data[idx].name, 161 .ops = starfive_jh71x0_clk_ops(max), 162 .parent_data = parents, 163 .num_parents = 164 ((max & JH71X0_CLK_MUX_MASK) >> JH71X0_CLK_MUX_SHIFT) + 1, 165 .flags = jh7110_voutclk_data[idx].flags, 166 }; 167 struct jh71x0_clk *clk = &priv->reg[idx]; 168 unsigned int i; 169 const char *fw_name[JH7110_VOUTCLK_EXT_END - JH7110_VOUTCLK_END] = { 170 "vout_src", 171 "vout_top_ahb", 172 "vout_top_axi", 173 "vout_top_hdmitx0_mclk", 174 "i2stx0_bclk", 175 "hdmitx0_pixelclk" 176 }; 177 178 for (i = 0; i < init.num_parents; i++) { 179 unsigned int pidx = jh7110_voutclk_data[idx].parents[i]; 180 181 if (pidx < JH7110_VOUTCLK_END) 182 parents[i].hw = &priv->reg[pidx].hw; 183 else if (pidx < JH7110_VOUTCLK_EXT_END) 184 parents[i].fw_name = fw_name[pidx - JH7110_VOUTCLK_END]; 185 } 186 187 clk->hw.init = &init; 188 clk->idx = idx; 189 clk->max_div = max & JH71X0_CLK_DIV_MASK; 190 191 ret = devm_clk_hw_register(&pdev->dev, &clk->hw); 192 if (ret) 193 goto err_exit; 194 } 195 196 ret = devm_of_clk_add_hw_provider(&pdev->dev, jh7110_voutclk_get, priv); 197 if (ret) 198 goto err_exit; 199 200 ret = jh7110_reset_controller_register(priv, "rst-vo", 4); 201 if (ret) 202 goto err_exit; 203 204 return 0; 205 206 err_exit: 207 pm_runtime_put_sync(priv->dev); 208 pm_runtime_disable(priv->dev); 209 return ret; 210 } 211 212 static int jh7110_voutcrg_remove(struct platform_device *pdev) 213 { 214 pm_runtime_put_sync(&pdev->dev); 215 pm_runtime_disable(&pdev->dev); 216 217 return 0; 218 } 219 220 static const struct of_device_id jh7110_voutcrg_match[] = { 221 { .compatible = "starfive,jh7110-voutcrg" }, 222 { /* sentinel */ } 223 }; 224 MODULE_DEVICE_TABLE(of, jh7110_voutcrg_match); 225 226 static struct platform_driver jh7110_voutcrg_driver = { 227 .probe = jh7110_voutcrg_probe, 228 .remove = jh7110_voutcrg_remove, 229 .driver = { 230 .name = "clk-starfive-jh7110-vout", 231 .of_match_table = jh7110_voutcrg_match, 232 .pm = pm_ptr(&jh7110_voutcrg_pm_ops), 233 }, 234 }; 235 module_platform_driver(jh7110_voutcrg_driver); 236 237 MODULE_AUTHOR("Xingyu Wu <xingyu.wu@starfivetech.com>"); 238 MODULE_DESCRIPTION("StarFive JH7110 Video-Output clock driver"); 239 MODULE_LICENSE("GPL"); 240