drivers/clk/hisilicon/clk-hi3519.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Hi3519 Clock Driver
   4  *
   5  * Copyright (c) 2015-2016 HiSilicon Technologies Co., Ltd.
   6  */
   7
   8 #include <dt-bindings/clock/hi3519-clock.h>
   9 #include <linux/clk-provider.h>
  10 #include <linux/module.h>
  11 #include <linux/platform_device.h>
  12 #include "clk.h"
  13 #include "reset.h"
  14
  15 #define HI3519_INNER_CLK_OFFSET 64
  16 #define HI3519_FIXED_24M        65
  17 #define HI3519_FIXED_50M        66
  18 #define HI3519_FIXED_75M        67
  19 #define HI3519_FIXED_125M       68
  20 #define HI3519_FIXED_150M       69
  21 #define HI3519_FIXED_200M       70
  22 #define HI3519_FIXED_250M       71
  23 #define HI3519_FIXED_300M       72
  24 #define HI3519_FIXED_400M       73
  25 #define HI3519_FMC_MUX          74
  26
  27 #define HI3519_NR_CLKS          128
  28
  29 struct hi3519_crg_data {
  30         struct hisi_clock_data *clk_data;
  31         struct hisi_reset_controller *rstc;
  32 };
  33
  34 static const struct hisi_fixed_rate_clock hi3519_fixed_rate_clks[] = {
  35         { HI3519_FIXED_24M, "24m", NULL, 0, 24000000, },
  36         { HI3519_FIXED_50M, "50m", NULL, 0, 50000000, },
  37         { HI3519_FIXED_75M, "75m", NULL, 0, 75000000, },
  38         { HI3519_FIXED_125M, "125m", NULL, 0, 125000000, },
  39         { HI3519_FIXED_150M, "150m", NULL, 0, 150000000, },
  40         { HI3519_FIXED_200M, "200m", NULL, 0, 200000000, },
  41         { HI3519_FIXED_250M, "250m", NULL, 0, 250000000, },
  42         { HI3519_FIXED_300M, "300m", NULL, 0, 300000000, },
  43         { HI3519_FIXED_400M, "400m", NULL, 0, 400000000, },
  44 };
  45
  46 static const char *const fmc_mux_p[] = {
  47                 "24m", "75m", "125m", "150m", "200m", "250m", "300m", "400m", };
  48 static u32 fmc_mux_table[] = {0, 1, 2, 3, 4, 5, 6, 7};
  49
  50 static const struct hisi_mux_clock hi3519_mux_clks[] = {
  51         { HI3519_FMC_MUX, "fmc_mux", fmc_mux_p, ARRAY_SIZE(fmc_mux_p),
  52                 CLK_SET_RATE_PARENT, 0xc0, 2, 3, 0, fmc_mux_table, },
  53 };
  54
  55 static const struct hisi_gate_clock hi3519_gate_clks[] = {
  56         { HI3519_FMC_CLK, "clk_fmc", "fmc_mux",
  57                 CLK_SET_RATE_PARENT, 0xc0, 1, 0, },
  58         { HI3519_UART0_CLK, "clk_uart0", "24m",
  59                 CLK_SET_RATE_PARENT, 0xe4, 20, 0, },
  60         { HI3519_UART1_CLK, "clk_uart1", "24m",
  61                 CLK_SET_RATE_PARENT, 0xe4, 21, 0, },
  62         { HI3519_UART2_CLK, "clk_uart2", "24m",
  63                 CLK_SET_RATE_PARENT, 0xe4, 22, 0, },
  64         { HI3519_UART3_CLK, "clk_uart3", "24m",
  65                 CLK_SET_RATE_PARENT, 0xe4, 23, 0, },
  66         { HI3519_UART4_CLK, "clk_uart4", "24m",
  67                 CLK_SET_RATE_PARENT, 0xe4, 24, 0, },
  68         { HI3519_SPI0_CLK, "clk_spi0", "50m",
  69                 CLK_SET_RATE_PARENT, 0xe4, 16, 0, },
  70         { HI3519_SPI1_CLK, "clk_spi1", "50m",
  71                 CLK_SET_RATE_PARENT, 0xe4, 17, 0, },
  72         { HI3519_SPI2_CLK, "clk_spi2", "50m",
  73                 CLK_SET_RATE_PARENT, 0xe4, 18, 0, },
  74 };
  75
  76 static struct hisi_clock_data *hi3519_clk_register(struct platform_device *pdev)
  77 {
  78         struct hisi_clock_data *clk_data;
  79         int ret;
  80
  81         clk_data = hisi_clk_alloc(pdev, HI3519_NR_CLKS);
  82         if (!clk_data)
  83                 return ERR_PTR(-ENOMEM);
  84
  85         ret = hisi_clk_register_fixed_rate(hi3519_fixed_rate_clks,
  86                                      ARRAY_SIZE(hi3519_fixed_rate_clks),
  87                                      clk_data);
  88         if (ret)
  89                 return ERR_PTR(ret);
  90
  91         ret = hisi_clk_register_mux(hi3519_mux_clks,
  92                                 ARRAY_SIZE(hi3519_mux_clks),
  93                                 clk_data);
  94         if (ret)
  95                 goto unregister_fixed_rate;
  96
  97         ret = hisi_clk_register_gate(hi3519_gate_clks,
  98                                 ARRAY_SIZE(hi3519_gate_clks),
  99                                 clk_data);
 100         if (ret)
 101                 goto unregister_mux;
 102
 103         ret = of_clk_add_provider(pdev->dev.of_node,
 104                         of_clk_src_onecell_get, &clk_data->clk_data);
 105         if (ret)
 106                 goto unregister_gate;
 107
 108         return clk_data;
 109
 110 unregister_fixed_rate:
 111         hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
 112                                 ARRAY_SIZE(hi3519_fixed_rate_clks),
 113                                 clk_data);
 114
 115 unregister_mux:
 116         hisi_clk_unregister_mux(hi3519_mux_clks,
 117                                 ARRAY_SIZE(hi3519_mux_clks),
 118                                 clk_data);
 119 unregister_gate:
 120         hisi_clk_unregister_gate(hi3519_gate_clks,
 121                                 ARRAY_SIZE(hi3519_gate_clks),
 122                                 clk_data);
 123         return ERR_PTR(ret);
 124 }
 125
 126 static void hi3519_clk_unregister(struct platform_device *pdev)
 127 {
 128         struct hi3519_crg_data *crg = platform_get_drvdata(pdev);
 129
 130         of_clk_del_provider(pdev->dev.of_node);
 131
 132         hisi_clk_unregister_gate(hi3519_gate_clks,
 133                                 ARRAY_SIZE(hi3519_mux_clks),
 134                                 crg->clk_data);
 135         hisi_clk_unregister_mux(hi3519_mux_clks,
 136                                 ARRAY_SIZE(hi3519_mux_clks),
 137                                 crg->clk_data);
 138         hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
 139                                 ARRAY_SIZE(hi3519_fixed_rate_clks),
 140                                 crg->clk_data);
 141 }
 142
 143 static int hi3519_clk_probe(struct platform_device *pdev)
 144 {
 145         struct hi3519_crg_data *crg;
 146
 147         crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL);
 148         if (!crg)
 149                 return -ENOMEM;
 150
 151         crg->rstc = hisi_reset_init(pdev);
 152         if (!crg->rstc)
 153                 return -ENOMEM;
 154
 155         crg->clk_data = hi3519_clk_register(pdev);
 156         if (IS_ERR(crg->clk_data)) {
 157                 hisi_reset_exit(crg->rstc);
 158                 return PTR_ERR(crg->clk_data);
 159         }
 160
 161         platform_set_drvdata(pdev, crg);
 162         return 0;
 163 }
 164
 165 static int hi3519_clk_remove(struct platform_device *pdev)
 166 {
 167         struct hi3519_crg_data *crg = platform_get_drvdata(pdev);
 168
 169         hisi_reset_exit(crg->rstc);
 170         hi3519_clk_unregister(pdev);
 171         return 0;
 172 }
 173
 174
 175 static const struct of_device_id hi3519_clk_match_table[] = {
 176         { .compatible = "hisilicon,hi3519-crg" },
 177         { }
 178 };
 179 MODULE_DEVICE_TABLE(of, hi3519_clk_match_table);
 180
 181 static struct platform_driver hi3519_clk_driver = {
 182         .probe          = hi3519_clk_probe,
 183         .remove         = hi3519_clk_remove,
 184         .driver         = {
 185                 .name   = "hi3519-clk",
 186                 .of_match_table = hi3519_clk_match_table,
 187         },
 188 };
 189
 190 static int __init hi3519_clk_init(void)
 191 {
 192         return platform_driver_register(&hi3519_clk_driver);
 193 }
 194 core_initcall(hi3519_clk_init);
 195
 196 static void __exit hi3519_clk_exit(void)
 197 {
 198         platform_driver_unregister(&hi3519_clk_driver);
 199 }
 200 module_exit(hi3519_clk_exit);
 201
 202 MODULE_LICENSE("GPL v2");
 203 MODULE_DESCRIPTION("HiSilicon Hi3519 Clock Driver");