drivers/clk/sunxi-ng/ccu-sun9i-a80-de.c

   1 /*
   2  * Copyright (c) 2016 Chen-Yu Tsai. All rights reserved.
   3  *
   4  * This software is licensed under the terms of the GNU General Public
   5  * License version 2, as published by the Free Software Foundation, and
   6  * may be copied, distributed, and modified under those terms.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <linux/clk.h>
  15 #include <linux/clk-provider.h>
  16 #include <linux/of_address.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/reset.h>
  19
  20 #include "ccu_common.h"
  21 #include "ccu_div.h"
  22 #include "ccu_gate.h"
  23 #include "ccu_reset.h"
  24
  25 #include "ccu-sun9i-a80-de.h"
  26
  27 static SUNXI_CCU_GATE(fe0_clk,          "fe0",          "fe0-div",
  28                       0x00, BIT(0), 0);
  29 static SUNXI_CCU_GATE(fe1_clk,          "fe1",          "fe1-div",
  30                       0x00, BIT(1), 0);
  31 static SUNXI_CCU_GATE(fe2_clk,          "fe2",          "fe2-div",
  32                       0x00, BIT(2), 0);
  33 static SUNXI_CCU_GATE(iep_deu0_clk,     "iep-deu0",     "de",
  34                       0x00, BIT(4), 0);
  35 static SUNXI_CCU_GATE(iep_deu1_clk,     "iep-deu1",     "de",
  36                       0x00, BIT(5), 0);
  37 static SUNXI_CCU_GATE(be0_clk,          "be0",          "be0-div",
  38                       0x00, BIT(8), 0);
  39 static SUNXI_CCU_GATE(be1_clk,          "be1",          "be1-div",
  40                       0x00, BIT(9), 0);
  41 static SUNXI_CCU_GATE(be2_clk,          "be2",          "be2-div",
  42                       0x00, BIT(10), 0);
  43 static SUNXI_CCU_GATE(iep_drc0_clk,     "iep-drc0",     "de",
  44                       0x00, BIT(12), 0);
  45 static SUNXI_CCU_GATE(iep_drc1_clk,     "iep-drc1",     "de",
  46                       0x00, BIT(13), 0);
  47 static SUNXI_CCU_GATE(merge_clk,        "merge",        "de",
  48                       0x00, BIT(20), 0);
  49
  50 static SUNXI_CCU_GATE(dram_fe0_clk,     "dram-fe0",     "sdram",
  51                       0x04, BIT(0), 0);
  52 static SUNXI_CCU_GATE(dram_fe1_clk,     "dram-fe1",     "sdram",
  53                       0x04, BIT(1), 0);
  54 static SUNXI_CCU_GATE(dram_fe2_clk,     "dram-fe2",     "sdram",
  55                       0x04, BIT(2), 0);
  56 static SUNXI_CCU_GATE(dram_deu0_clk,    "dram-deu0",    "sdram",
  57                       0x04, BIT(4), 0);
  58 static SUNXI_CCU_GATE(dram_deu1_clk,    "dram-deu1",    "sdram",
  59                       0x04, BIT(5), 0);
  60 static SUNXI_CCU_GATE(dram_be0_clk,     "dram-be0",     "sdram",
  61                       0x04, BIT(8), 0);
  62 static SUNXI_CCU_GATE(dram_be1_clk,     "dram-be1",     "sdram",
  63                       0x04, BIT(9), 0);
  64 static SUNXI_CCU_GATE(dram_be2_clk,     "dram-be2",     "sdram",
  65                       0x04, BIT(10), 0);
  66 static SUNXI_CCU_GATE(dram_drc0_clk,    "dram-drc0",    "sdram",
  67                       0x04, BIT(12), 0);
  68 static SUNXI_CCU_GATE(dram_drc1_clk,    "dram-drc1",    "sdram",
  69                       0x04, BIT(13), 0);
  70
  71 static SUNXI_CCU_GATE(bus_fe0_clk,      "bus-fe0",      "bus-de",
  72                       0x08, BIT(0), 0);
  73 static SUNXI_CCU_GATE(bus_fe1_clk,      "bus-fe1",      "bus-de",
  74                       0x08, BIT(1), 0);
  75 static SUNXI_CCU_GATE(bus_fe2_clk,      "bus-fe2",      "bus-de",
  76                       0x08, BIT(2), 0);
  77 static SUNXI_CCU_GATE(bus_deu0_clk,     "bus-deu0",     "bus-de",
  78                       0x08, BIT(4), 0);
  79 static SUNXI_CCU_GATE(bus_deu1_clk,     "bus-deu1",     "bus-de",
  80                       0x08, BIT(5), 0);
  81 static SUNXI_CCU_GATE(bus_be0_clk,      "bus-be0",      "bus-de",
  82                       0x08, BIT(8), 0);
  83 static SUNXI_CCU_GATE(bus_be1_clk,      "bus-be1",      "bus-de",
  84                       0x08, BIT(9), 0);
  85 static SUNXI_CCU_GATE(bus_be2_clk,      "bus-be2",      "bus-de",
  86                       0x08, BIT(10), 0);
  87 static SUNXI_CCU_GATE(bus_drc0_clk,     "bus-drc0",     "bus-de",
  88                       0x08, BIT(12), 0);
  89 static SUNXI_CCU_GATE(bus_drc1_clk,     "bus-drc1",     "bus-de",
  90                       0x08, BIT(13), 0);
  91
  92 static SUNXI_CCU_M(fe0_div_clk, "fe0-div", "de", 0x20, 0, 4, 0);
  93 static SUNXI_CCU_M(fe1_div_clk, "fe1-div", "de", 0x20, 4, 4, 0);
  94 static SUNXI_CCU_M(fe2_div_clk, "fe2-div", "de", 0x20, 8, 4, 0);
  95 static SUNXI_CCU_M(be0_div_clk, "be0-div", "de", 0x20, 16, 4, 0);
  96 static SUNXI_CCU_M(be1_div_clk, "be1-div", "de", 0x20, 20, 4, 0);
  97 static SUNXI_CCU_M(be2_div_clk, "be2-div", "de", 0x20, 24, 4, 0);
  98
  99 static struct ccu_common *sun9i_a80_de_clks[] = {
 100         &fe0_clk.common,
 101         &fe1_clk.common,
 102         &fe2_clk.common,
 103         &iep_deu0_clk.common,
 104         &iep_deu1_clk.common,
 105         &be0_clk.common,
 106         &be1_clk.common,
 107         &be2_clk.common,
 108         &iep_drc0_clk.common,
 109         &iep_drc1_clk.common,
 110         &merge_clk.common,
 111
 112         &dram_fe0_clk.common,
 113         &dram_fe1_clk.common,
 114         &dram_fe2_clk.common,
 115         &dram_deu0_clk.common,
 116         &dram_deu1_clk.common,
 117         &dram_be0_clk.common,
 118         &dram_be1_clk.common,
 119         &dram_be2_clk.common,
 120         &dram_drc0_clk.common,
 121         &dram_drc1_clk.common,
 122
 123         &bus_fe0_clk.common,
 124         &bus_fe1_clk.common,
 125         &bus_fe2_clk.common,
 126         &bus_deu0_clk.common,
 127         &bus_deu1_clk.common,
 128         &bus_be0_clk.common,
 129         &bus_be1_clk.common,
 130         &bus_be2_clk.common,
 131         &bus_drc0_clk.common,
 132         &bus_drc1_clk.common,
 133
 134         &fe0_div_clk.common,
 135         &fe1_div_clk.common,
 136         &fe2_div_clk.common,
 137         &be0_div_clk.common,
 138         &be1_div_clk.common,
 139         &be2_div_clk.common,
 140 };
 141
 142 static struct clk_hw_onecell_data sun9i_a80_de_hw_clks = {
 143         .hws    = {
 144                 [CLK_FE0]       = &fe0_clk.common.hw,
 145                 [CLK_FE1]       = &fe1_clk.common.hw,
 146                 [CLK_FE2]       = &fe2_clk.common.hw,
 147                 [CLK_IEP_DEU0]  = &iep_deu0_clk.common.hw,
 148                 [CLK_IEP_DEU1]  = &iep_deu1_clk.common.hw,
 149                 [CLK_BE0]       = &be0_clk.common.hw,
 150                 [CLK_BE1]       = &be1_clk.common.hw,
 151                 [CLK_BE2]       = &be2_clk.common.hw,
 152                 [CLK_IEP_DRC0]  = &iep_drc0_clk.common.hw,
 153                 [CLK_IEP_DRC1]  = &iep_drc1_clk.common.hw,
 154                 [CLK_MERGE]     = &merge_clk.common.hw,
 155
 156                 [CLK_DRAM_FE0]  = &dram_fe0_clk.common.hw,
 157                 [CLK_DRAM_FE1]  = &dram_fe1_clk.common.hw,
 158                 [CLK_DRAM_FE2]  = &dram_fe2_clk.common.hw,
 159                 [CLK_DRAM_DEU0] = &dram_deu0_clk.common.hw,
 160                 [CLK_DRAM_DEU1] = &dram_deu1_clk.common.hw,
 161                 [CLK_DRAM_BE0]  = &dram_be0_clk.common.hw,
 162                 [CLK_DRAM_BE1]  = &dram_be1_clk.common.hw,
 163                 [CLK_DRAM_BE2]  = &dram_be2_clk.common.hw,
 164                 [CLK_DRAM_DRC0] = &dram_drc0_clk.common.hw,
 165                 [CLK_DRAM_DRC1] = &dram_drc1_clk.common.hw,
 166
 167                 [CLK_BUS_FE0]   = &bus_fe0_clk.common.hw,
 168                 [CLK_BUS_FE1]   = &bus_fe1_clk.common.hw,
 169                 [CLK_BUS_FE2]   = &bus_fe2_clk.common.hw,
 170                 [CLK_BUS_DEU0]  = &bus_deu0_clk.common.hw,
 171                 [CLK_BUS_DEU1]  = &bus_deu1_clk.common.hw,
 172                 [CLK_BUS_BE0]   = &bus_be0_clk.common.hw,
 173                 [CLK_BUS_BE1]   = &bus_be1_clk.common.hw,
 174                 [CLK_BUS_BE2]   = &bus_be2_clk.common.hw,
 175                 [CLK_BUS_DRC0]  = &bus_drc0_clk.common.hw,
 176                 [CLK_BUS_DRC1]  = &bus_drc1_clk.common.hw,
 177
 178                 [CLK_FE0_DIV]   = &fe0_div_clk.common.hw,
 179                 [CLK_FE1_DIV]   = &fe1_div_clk.common.hw,
 180                 [CLK_FE2_DIV]   = &fe2_div_clk.common.hw,
 181                 [CLK_BE0_DIV]   = &be0_div_clk.common.hw,
 182                 [CLK_BE1_DIV]   = &be1_div_clk.common.hw,
 183                 [CLK_BE2_DIV]   = &be2_div_clk.common.hw,
 184         },
 185         .num    = CLK_NUMBER,
 186 };
 187
 188 static struct ccu_reset_map sun9i_a80_de_resets[] = {
 189         [RST_FE0]       = { 0x0c, BIT(0) },
 190         [RST_FE1]       = { 0x0c, BIT(1) },
 191         [RST_FE2]       = { 0x0c, BIT(2) },
 192         [RST_DEU0]      = { 0x0c, BIT(4) },
 193         [RST_DEU1]      = { 0x0c, BIT(5) },
 194         [RST_BE0]       = { 0x0c, BIT(8) },
 195         [RST_BE1]       = { 0x0c, BIT(9) },
 196         [RST_BE2]       = { 0x0c, BIT(10) },
 197         [RST_DRC0]      = { 0x0c, BIT(12) },
 198         [RST_DRC1]      = { 0x0c, BIT(13) },
 199         [RST_MERGE]     = { 0x0c, BIT(20) },
 200 };
 201
 202 static const struct sunxi_ccu_desc sun9i_a80_de_clk_desc = {
 203         .ccu_clks       = sun9i_a80_de_clks,
 204         .num_ccu_clks   = ARRAY_SIZE(sun9i_a80_de_clks),
 205
 206         .hw_clks        = &sun9i_a80_de_hw_clks,
 207
 208         .resets         = sun9i_a80_de_resets,
 209         .num_resets     = ARRAY_SIZE(sun9i_a80_de_resets),
 210 };
 211
 212 static int sun9i_a80_de_clk_probe(struct platform_device *pdev)
 213 {
 214         struct resource *res;
 215         struct clk *bus_clk;
 216         struct reset_control *rstc;
 217         void __iomem *reg;
 218         int ret;
 219
 220         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 221         reg = devm_ioremap_resource(&pdev->dev, res);
 222         if (IS_ERR(reg))
 223                 return PTR_ERR(reg);
 224
 225         bus_clk = devm_clk_get(&pdev->dev, "bus");
 226         if (IS_ERR(bus_clk)) {
 227                 ret = PTR_ERR(bus_clk);
 228                 if (ret != -EPROBE_DEFER)
 229                         dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);
 230                 return ret;
 231         }
 232
 233         rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 234         if (IS_ERR(rstc)) {
 235                 ret = PTR_ERR(rstc);
 236                 if (ret != -EPROBE_DEFER)
 237                         dev_err(&pdev->dev,
 238                                 "Couldn't get reset control: %d\n", ret);
 239                 return ret;
 240         }
 241
 242         /* The bus clock needs to be enabled for us to access the registers */
 243         ret = clk_prepare_enable(bus_clk);
 244         if (ret) {
 245                 dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
 246                 return ret;
 247         }
 248
 249         /* The reset control needs to be asserted for the controls to work */
 250         ret = reset_control_deassert(rstc);
 251         if (ret) {
 252                 dev_err(&pdev->dev,
 253                         "Couldn't deassert reset control: %d\n", ret);
 254                 goto err_disable_clk;
 255         }
 256
 257         ret = sunxi_ccu_probe(pdev->dev.of_node, reg,
 258                               &sun9i_a80_de_clk_desc);
 259         if (ret)
 260                 goto err_assert_reset;
 261
 262         return 0;
 263
 264 err_assert_reset:
 265         reset_control_assert(rstc);
 266 err_disable_clk:
 267         clk_disable_unprepare(bus_clk);
 268         return ret;
 269 }
 270
 271 static const struct of_device_id sun9i_a80_de_clk_ids[] = {
 272         { .compatible = "allwinner,sun9i-a80-de-clks" },
 273         { }
 274 };
 275
 276 static struct platform_driver sun9i_a80_de_clk_driver = {
 277         .probe  = sun9i_a80_de_clk_probe,
 278         .driver = {
 279                 .name   = "sun9i-a80-de-clks",
 280                 .of_match_table = sun9i_a80_de_clk_ids,
 281         },
 282 };
 283 builtin_platform_driver(sun9i_a80_de_clk_driver);