drivers/clk/zynq/clkc.c

   1 /*
   2  * Zynq clock controller
   3  *
   4  *  Copyright (C) 2012 - 2013 Xilinx
   5  *
   6  *  Sören Brinkmann <soren.brinkmann@xilinx.com>
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License v2 as published by
  10  * the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <linux/clk/zynq.h>
  22 #include <linux/clk-provider.h>
  23 #include <linux/of.h>
  24 #include <linux/slab.h>
  25 #include <linux/string.h>
  26 #include <linux/io.h>
  27
  28 static void __iomem *zynq_slcr_base_priv;
  29
  30 #define SLCR_ARMPLL_CTRL                (zynq_slcr_base_priv + 0x100)
  31 #define SLCR_DDRPLL_CTRL                (zynq_slcr_base_priv + 0x104)
  32 #define SLCR_IOPLL_CTRL                 (zynq_slcr_base_priv + 0x108)
  33 #define SLCR_PLL_STATUS                 (zynq_slcr_base_priv + 0x10c)
  34 #define SLCR_ARM_CLK_CTRL               (zynq_slcr_base_priv + 0x120)
  35 #define SLCR_DDR_CLK_CTRL               (zynq_slcr_base_priv + 0x124)
  36 #define SLCR_DCI_CLK_CTRL               (zynq_slcr_base_priv + 0x128)
  37 #define SLCR_APER_CLK_CTRL              (zynq_slcr_base_priv + 0x12c)
  38 #define SLCR_GEM0_CLK_CTRL              (zynq_slcr_base_priv + 0x140)
  39 #define SLCR_GEM1_CLK_CTRL              (zynq_slcr_base_priv + 0x144)
  40 #define SLCR_SMC_CLK_CTRL               (zynq_slcr_base_priv + 0x148)
  41 #define SLCR_LQSPI_CLK_CTRL             (zynq_slcr_base_priv + 0x14c)
  42 #define SLCR_SDIO_CLK_CTRL              (zynq_slcr_base_priv + 0x150)
  43 #define SLCR_UART_CLK_CTRL              (zynq_slcr_base_priv + 0x154)
  44 #define SLCR_SPI_CLK_CTRL               (zynq_slcr_base_priv + 0x158)
  45 #define SLCR_CAN_CLK_CTRL               (zynq_slcr_base_priv + 0x15c)
  46 #define SLCR_CAN_MIOCLK_CTRL            (zynq_slcr_base_priv + 0x160)
  47 #define SLCR_DBG_CLK_CTRL               (zynq_slcr_base_priv + 0x164)
  48 #define SLCR_PCAP_CLK_CTRL              (zynq_slcr_base_priv + 0x168)
  49 #define SLCR_FPGA0_CLK_CTRL             (zynq_slcr_base_priv + 0x170)
  50 #define SLCR_621_TRUE                   (zynq_slcr_base_priv + 0x1c4)
  51 #define SLCR_SWDT_CLK_SEL               (zynq_slcr_base_priv + 0x304)
  52
  53 #define NUM_MIO_PINS    54
  54
  55 enum zynq_clk {
  56         armpll, ddrpll, iopll,
  57         cpu_6or4x, cpu_3or2x, cpu_2x, cpu_1x,
  58         ddr2x, ddr3x, dci,
  59         lqspi, smc, pcap, gem0, gem1, fclk0, fclk1, fclk2, fclk3, can0, can1,
  60         sdio0, sdio1, uart0, uart1, spi0, spi1, dma,
  61         usb0_aper, usb1_aper, gem0_aper, gem1_aper,
  62         sdio0_aper, sdio1_aper, spi0_aper, spi1_aper, can0_aper, can1_aper,
  63         i2c0_aper, i2c1_aper, uart0_aper, uart1_aper, gpio_aper, lqspi_aper,
  64         smc_aper, swdt, dbg_trc, dbg_apb, clk_max};
  65
  66 static struct clk *ps_clk;
  67 static struct clk *clks[clk_max];
  68 static struct clk_onecell_data clk_data;
  69
  70 static DEFINE_SPINLOCK(armpll_lock);
  71 static DEFINE_SPINLOCK(ddrpll_lock);
  72 static DEFINE_SPINLOCK(iopll_lock);
  73 static DEFINE_SPINLOCK(armclk_lock);
  74 static DEFINE_SPINLOCK(swdtclk_lock);
  75 static DEFINE_SPINLOCK(ddrclk_lock);
  76 static DEFINE_SPINLOCK(dciclk_lock);
  77 static DEFINE_SPINLOCK(gem0clk_lock);
  78 static DEFINE_SPINLOCK(gem1clk_lock);
  79 static DEFINE_SPINLOCK(canclk_lock);
  80 static DEFINE_SPINLOCK(canmioclk_lock);
  81 static DEFINE_SPINLOCK(dbgclk_lock);
  82 static DEFINE_SPINLOCK(aperclk_lock);
  83
  84 static const char dummy_nm[] __initconst = "dummy_name";
  85
  86 static const char *armpll_parents[] __initdata = {"armpll_int", "ps_clk"};
  87 static const char *ddrpll_parents[] __initdata = {"ddrpll_int", "ps_clk"};
  88 static const char *iopll_parents[] __initdata = {"iopll_int", "ps_clk"};
  89 static const char *gem0_mux_parents[] __initdata = {"gem0_div1", dummy_nm};
  90 static const char *gem1_mux_parents[] __initdata = {"gem1_div1", dummy_nm};
  91 static const char *can0_mio_mux2_parents[] __initdata = {"can0_gate",
  92         "can0_mio_mux"};
  93 static const char *can1_mio_mux2_parents[] __initdata = {"can1_gate",
  94         "can1_mio_mux"};
  95 static const char *dbg_emio_mux_parents[] __initdata = {"dbg_div",
  96         dummy_nm};
  97
  98 static const char *dbgtrc_emio_input_names[] __initdata = {"trace_emio_clk"};
  99 static const char *gem0_emio_input_names[] __initdata = {"gem0_emio_clk"};
 100 static const char *gem1_emio_input_names[] __initdata = {"gem1_emio_clk"};
 101 static const char *swdt_ext_clk_input_names[] __initdata = {"swdt_ext_clk"};
 102
 103 static void __init zynq_clk_register_fclk(enum zynq_clk fclk,
 104                 const char *clk_name, void __iomem *fclk_ctrl_reg,
 105                 const char **parents)
 106 {
 107         struct clk *clk;
 108         char *mux_name;
 109         char *div0_name;
 110         char *div1_name;
 111         spinlock_t *fclk_lock;
 112         spinlock_t *fclk_gate_lock;
 113         void __iomem *fclk_gate_reg = fclk_ctrl_reg + 8;
 114
 115         fclk_lock = kmalloc(sizeof(*fclk_lock), GFP_KERNEL);
 116         if (!fclk_lock)
 117                 goto err;
 118         fclk_gate_lock = kmalloc(sizeof(*fclk_gate_lock), GFP_KERNEL);
 119         if (!fclk_gate_lock)
 120                 goto err;
 121         spin_lock_init(fclk_lock);
 122         spin_lock_init(fclk_gate_lock);
 123
 124         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name);
 125         div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name);
 126         div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name);
 127
 128         clk = clk_register_mux(NULL, mux_name, parents, 4,
 129                         CLK_SET_RATE_NO_REPARENT, fclk_ctrl_reg, 4, 2, 0,
 130                         fclk_lock);
 131
 132         clk = clk_register_divider(NULL, div0_name, mux_name,
 133                         0, fclk_ctrl_reg, 8, 6, CLK_DIVIDER_ONE_BASED |
 134                         CLK_DIVIDER_ALLOW_ZERO, fclk_lock);
 135
 136         clk = clk_register_divider(NULL, div1_name, div0_name,
 137                         CLK_SET_RATE_PARENT, fclk_ctrl_reg, 20, 6,
 138                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 139                         fclk_lock);
 140
 141         clks[fclk] = clk_register_gate(NULL, clk_name,
 142                         div1_name, CLK_SET_RATE_PARENT, fclk_gate_reg,
 143                         0, CLK_GATE_SET_TO_DISABLE, fclk_gate_lock);
 144         kfree(mux_name);
 145         kfree(div0_name);
 146         kfree(div1_name);
 147
 148         return;
 149
 150 err:
 151         clks[fclk] = ERR_PTR(-ENOMEM);
 152 }
 153
 154 static void __init zynq_clk_register_periph_clk(enum zynq_clk clk0,
 155                 enum zynq_clk clk1, const char *clk_name0,
 156                 const char *clk_name1, void __iomem *clk_ctrl,
 157                 const char **parents, unsigned int two_gates)
 158 {
 159         struct clk *clk;
 160         char *mux_name;
 161         char *div_name;
 162         spinlock_t *lock;
 163
 164         lock = kmalloc(sizeof(*lock), GFP_KERNEL);
 165         if (!lock)
 166                 goto err;
 167         spin_lock_init(lock);
 168
 169         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name0);
 170         div_name = kasprintf(GFP_KERNEL, "%s_div", clk_name0);
 171
 172         clk = clk_register_mux(NULL, mux_name, parents, 4,
 173                         CLK_SET_RATE_NO_REPARENT, clk_ctrl, 4, 2, 0, lock);
 174
 175         clk = clk_register_divider(NULL, div_name, mux_name, 0, clk_ctrl, 8, 6,
 176                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, lock);
 177
 178         clks[clk0] = clk_register_gate(NULL, clk_name0, div_name,
 179                         CLK_SET_RATE_PARENT, clk_ctrl, 0, 0, lock);
 180         if (two_gates)
 181                 clks[clk1] = clk_register_gate(NULL, clk_name1, div_name,
 182                                 CLK_SET_RATE_PARENT, clk_ctrl, 1, 0, lock);
 183
 184         kfree(mux_name);
 185         kfree(div_name);
 186
 187         return;
 188
 189 err:
 190         clks[clk0] = ERR_PTR(-ENOMEM);
 191         if (two_gates)
 192                 clks[clk1] = ERR_PTR(-ENOMEM);
 193 }
 194
 195 static void __init zynq_clk_setup(struct device_node *np)
 196 {
 197         int i;
 198         u32 tmp;
 199         int ret;
 200         struct clk *clk;
 201         char *clk_name;
 202         const char *clk_output_name[clk_max];
 203         const char *cpu_parents[4];
 204         const char *periph_parents[4];
 205         const char *swdt_ext_clk_mux_parents[2];
 206         const char *can_mio_mux_parents[NUM_MIO_PINS];
 207
 208         pr_info("Zynq clock init\n");
 209
 210         /* get clock output names from DT */
 211         for (i = 0; i < clk_max; i++) {
 212                 if (of_property_read_string_index(np, "clock-output-names",
 213                                   i, &clk_output_name[i])) {
 214                         pr_err("%s: clock output name not in DT\n", __func__);
 215                         BUG();
 216                 }
 217         }
 218         cpu_parents[0] = clk_output_name[armpll];
 219         cpu_parents[1] = clk_output_name[armpll];
 220         cpu_parents[2] = clk_output_name[ddrpll];
 221         cpu_parents[3] = clk_output_name[iopll];
 222         periph_parents[0] = clk_output_name[iopll];
 223         periph_parents[1] = clk_output_name[iopll];
 224         periph_parents[2] = clk_output_name[armpll];
 225         periph_parents[3] = clk_output_name[ddrpll];
 226
 227         /* ps_clk */
 228         ret = of_property_read_u32(np, "ps-clk-frequency", &tmp);
 229         if (ret) {
 230                 pr_warn("ps_clk frequency not specified, using 33 MHz.\n");
 231                 tmp = 33333333;
 232         }
 233         ps_clk = clk_register_fixed_rate(NULL, "ps_clk", NULL, CLK_IS_ROOT,
 234                         tmp);
 235
 236         /* PLLs */
 237         clk = clk_register_zynq_pll("armpll_int", "ps_clk", SLCR_ARMPLL_CTRL,
 238                         SLCR_PLL_STATUS, 0, &armpll_lock);
 239         clks[armpll] = clk_register_mux(NULL, clk_output_name[armpll],
 240                         armpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 241                         SLCR_ARMPLL_CTRL, 4, 1, 0, &armpll_lock);
 242
 243         clk = clk_register_zynq_pll("ddrpll_int", "ps_clk", SLCR_DDRPLL_CTRL,
 244                         SLCR_PLL_STATUS, 1, &ddrpll_lock);
 245         clks[ddrpll] = clk_register_mux(NULL, clk_output_name[ddrpll],
 246                         ddrpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 247                         SLCR_DDRPLL_CTRL, 4, 1, 0, &ddrpll_lock);
 248
 249         clk = clk_register_zynq_pll("iopll_int", "ps_clk", SLCR_IOPLL_CTRL,
 250                         SLCR_PLL_STATUS, 2, &iopll_lock);
 251         clks[iopll] = clk_register_mux(NULL, clk_output_name[iopll],
 252                         iopll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 253                         SLCR_IOPLL_CTRL, 4, 1, 0, &iopll_lock);
 254
 255         /* CPU clocks */
 256         tmp = readl(SLCR_621_TRUE) & 1;
 257         clk = clk_register_mux(NULL, "cpu_mux", cpu_parents, 4,
 258                         CLK_SET_RATE_NO_REPARENT, SLCR_ARM_CLK_CTRL, 4, 2, 0,
 259                         &armclk_lock);
 260         clk = clk_register_divider(NULL, "cpu_div", "cpu_mux", 0,
 261                         SLCR_ARM_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 262                         CLK_DIVIDER_ALLOW_ZERO, &armclk_lock);
 263
 264         clks[cpu_6or4x] = clk_register_gate(NULL, clk_output_name[cpu_6or4x],
 265                         "cpu_div", CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
 266                         SLCR_ARM_CLK_CTRL, 24, 0, &armclk_lock);
 267
 268         clk = clk_register_fixed_factor(NULL, "cpu_3or2x_div", "cpu_div", 0,
 269                         1, 2);
 270         clks[cpu_3or2x] = clk_register_gate(NULL, clk_output_name[cpu_3or2x],
 271                         "cpu_3or2x_div", CLK_IGNORE_UNUSED,
 272                         SLCR_ARM_CLK_CTRL, 25, 0, &armclk_lock);
 273
 274         clk = clk_register_fixed_factor(NULL, "cpu_2x_div", "cpu_div", 0, 1,
 275                         2 + tmp);
 276         clks[cpu_2x] = clk_register_gate(NULL, clk_output_name[cpu_2x],
 277                         "cpu_2x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL,
 278                         26, 0, &armclk_lock);
 279         clk_prepare_enable(clks[cpu_2x]);
 280
 281         clk = clk_register_fixed_factor(NULL, "cpu_1x_div", "cpu_div", 0, 1,
 282                         4 + 2 * tmp);
 283         clks[cpu_1x] = clk_register_gate(NULL, clk_output_name[cpu_1x],
 284                         "cpu_1x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL, 27,
 285                         0, &armclk_lock);
 286
 287         /* Timers */
 288         swdt_ext_clk_mux_parents[0] = clk_output_name[cpu_1x];
 289         for (i = 0; i < ARRAY_SIZE(swdt_ext_clk_input_names); i++) {
 290                 int idx = of_property_match_string(np, "clock-names",
 291                                 swdt_ext_clk_input_names[i]);
 292                 if (idx >= 0)
 293                         swdt_ext_clk_mux_parents[i + 1] =
 294                                 of_clk_get_parent_name(np, idx);
 295                 else
 296                         swdt_ext_clk_mux_parents[i + 1] = dummy_nm;
 297         }
 298         clks[swdt] = clk_register_mux(NULL, clk_output_name[swdt],
 299                         swdt_ext_clk_mux_parents, 2, CLK_SET_RATE_PARENT |
 300                         CLK_SET_RATE_NO_REPARENT, SLCR_SWDT_CLK_SEL, 0, 1, 0,
 301                         &swdtclk_lock);
 302
 303         /* DDR clocks */
 304         clk = clk_register_divider(NULL, "ddr2x_div", "ddrpll", 0,
 305                         SLCR_DDR_CLK_CTRL, 26, 6, CLK_DIVIDER_ONE_BASED |
 306                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 307         clks[ddr2x] = clk_register_gate(NULL, clk_output_name[ddr2x],
 308                         "ddr2x_div", 0, SLCR_DDR_CLK_CTRL, 1, 0, &ddrclk_lock);
 309         clk_prepare_enable(clks[ddr2x]);
 310         clk = clk_register_divider(NULL, "ddr3x_div", "ddrpll", 0,
 311                         SLCR_DDR_CLK_CTRL, 20, 6, CLK_DIVIDER_ONE_BASED |
 312                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 313         clks[ddr3x] = clk_register_gate(NULL, clk_output_name[ddr3x],
 314                         "ddr3x_div", 0, SLCR_DDR_CLK_CTRL, 0, 0, &ddrclk_lock);
 315         clk_prepare_enable(clks[ddr3x]);
 316
 317         clk = clk_register_divider(NULL, "dci_div0", "ddrpll", 0,
 318                         SLCR_DCI_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 319                         CLK_DIVIDER_ALLOW_ZERO, &dciclk_lock);
 320         clk = clk_register_divider(NULL, "dci_div1", "dci_div0",
 321                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 20, 6,
 322                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 323                         &dciclk_lock);
 324         clks[dci] = clk_register_gate(NULL, clk_output_name[dci], "dci_div1",
 325                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 0, 0,
 326                         &dciclk_lock);
 327         clk_prepare_enable(clks[dci]);
 328
 329         /* Peripheral clocks */
 330         for (i = fclk0; i <= fclk3; i++)
 331                 zynq_clk_register_fclk(i, clk_output_name[i],
 332                                 SLCR_FPGA0_CLK_CTRL + 0x10 * (i - fclk0),
 333                                 periph_parents);
 334
 335         zynq_clk_register_periph_clk(lqspi, 0, clk_output_name[lqspi], NULL,
 336                         SLCR_LQSPI_CLK_CTRL, periph_parents, 0);
 337
 338         zynq_clk_register_periph_clk(smc, 0, clk_output_name[smc], NULL,
 339                         SLCR_SMC_CLK_CTRL, periph_parents, 0);
 340
 341         zynq_clk_register_periph_clk(pcap, 0, clk_output_name[pcap], NULL,
 342                         SLCR_PCAP_CLK_CTRL, periph_parents, 0);
 343
 344         zynq_clk_register_periph_clk(sdio0, sdio1, clk_output_name[sdio0],
 345                         clk_output_name[sdio1], SLCR_SDIO_CLK_CTRL,
 346                         periph_parents, 1);
 347
 348         zynq_clk_register_periph_clk(uart0, uart1, clk_output_name[uart0],
 349                         clk_output_name[uart1], SLCR_UART_CLK_CTRL,
 350                         periph_parents, 1);
 351
 352         zynq_clk_register_periph_clk(spi0, spi1, clk_output_name[spi0],
 353                         clk_output_name[spi1], SLCR_SPI_CLK_CTRL,
 354                         periph_parents, 1);
 355
 356         for (i = 0; i < ARRAY_SIZE(gem0_emio_input_names); i++) {
 357                 int idx = of_property_match_string(np, "clock-names",
 358                                 gem0_emio_input_names[i]);
 359                 if (idx >= 0)
 360                         gem0_mux_parents[i + 1] = of_clk_get_parent_name(np,
 361                                         idx);
 362         }
 363         clk = clk_register_mux(NULL, "gem0_mux", periph_parents, 4,
 364                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM0_CLK_CTRL, 4, 2, 0,
 365                         &gem0clk_lock);
 366         clk = clk_register_divider(NULL, "gem0_div0", "gem0_mux", 0,
 367                         SLCR_GEM0_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 368                         CLK_DIVIDER_ALLOW_ZERO, &gem0clk_lock);
 369         clk = clk_register_divider(NULL, "gem0_div1", "gem0_div0",
 370                         CLK_SET_RATE_PARENT, SLCR_GEM0_CLK_CTRL, 20, 6,
 371                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 372                         &gem0clk_lock);
 373         clk = clk_register_mux(NULL, "gem0_emio_mux", gem0_mux_parents, 2,
 374                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 375                         SLCR_GEM0_CLK_CTRL, 6, 1, 0,
 376                         &gem0clk_lock);
 377         clks[gem0] = clk_register_gate(NULL, clk_output_name[gem0],
 378                         "gem0_emio_mux", CLK_SET_RATE_PARENT,
 379                         SLCR_GEM0_CLK_CTRL, 0, 0, &gem0clk_lock);
 380
 381         for (i = 0; i < ARRAY_SIZE(gem1_emio_input_names); i++) {
 382                 int idx = of_property_match_string(np, "clock-names",
 383                                 gem1_emio_input_names[i]);
 384                 if (idx >= 0)
 385                         gem1_mux_parents[i + 1] = of_clk_get_parent_name(np,
 386                                         idx);
 387         }
 388         clk = clk_register_mux(NULL, "gem1_mux", periph_parents, 4,
 389                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM1_CLK_CTRL, 4, 2, 0,
 390                         &gem1clk_lock);
 391         clk = clk_register_divider(NULL, "gem1_div0", "gem1_mux", 0,
 392                         SLCR_GEM1_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 393                         CLK_DIVIDER_ALLOW_ZERO, &gem1clk_lock);
 394         clk = clk_register_divider(NULL, "gem1_div1", "gem1_div0",
 395                         CLK_SET_RATE_PARENT, SLCR_GEM1_CLK_CTRL, 20, 6,
 396                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 397                         &gem1clk_lock);
 398         clk = clk_register_mux(NULL, "gem1_emio_mux", gem1_mux_parents, 2,
 399                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 400                         SLCR_GEM1_CLK_CTRL, 6, 1, 0,
 401                         &gem1clk_lock);
 402         clks[gem1] = clk_register_gate(NULL, clk_output_name[gem1],
 403                         "gem1_emio_mux", CLK_SET_RATE_PARENT,
 404                         SLCR_GEM1_CLK_CTRL, 0, 0, &gem1clk_lock);
 405
 406         tmp = strlen("mio_clk_00x");
 407         clk_name = kmalloc(tmp, GFP_KERNEL);
 408         for (i = 0; i < NUM_MIO_PINS; i++) {
 409                 int idx;
 410
 411                 snprintf(clk_name, tmp, "mio_clk_%2.2d", i);
 412                 idx = of_property_match_string(np, "clock-names", clk_name);
 413                 if (idx >= 0)
 414                         can_mio_mux_parents[i] = of_clk_get_parent_name(np,
 415                                                 idx);
 416                 else
 417                         can_mio_mux_parents[i] = dummy_nm;
 418         }
 419         kfree(clk_name);
 420         clk = clk_register_mux(NULL, "can_mux", periph_parents, 4,
 421                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_CLK_CTRL, 4, 2, 0,
 422                         &canclk_lock);
 423         clk = clk_register_divider(NULL, "can_div0", "can_mux", 0,
 424                         SLCR_CAN_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 425                         CLK_DIVIDER_ALLOW_ZERO, &canclk_lock);
 426         clk = clk_register_divider(NULL, "can_div1", "can_div0",
 427                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 20, 6,
 428                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 429                         &canclk_lock);
 430         clk = clk_register_gate(NULL, "can0_gate", "can_div1",
 431                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 0, 0,
 432                         &canclk_lock);
 433         clk = clk_register_gate(NULL, "can1_gate", "can_div1",
 434                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 1, 0,
 435                         &canclk_lock);
 436         clk = clk_register_mux(NULL, "can0_mio_mux",
 437                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 438                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 0, 6, 0,
 439                         &canmioclk_lock);
 440         clk = clk_register_mux(NULL, "can1_mio_mux",
 441                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 442                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 16, 6,
 443                         0, &canmioclk_lock);
 444         clks[can0] = clk_register_mux(NULL, clk_output_name[can0],
 445                         can0_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 446                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 6, 1, 0,
 447                         &canmioclk_lock);
 448         clks[can1] = clk_register_mux(NULL, clk_output_name[can1],
 449                         can1_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 450                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 22, 1,
 451                         0, &canmioclk_lock);
 452
 453         for (i = 0; i < ARRAY_SIZE(dbgtrc_emio_input_names); i++) {
 454                 int idx = of_property_match_string(np, "clock-names",
 455                                 dbgtrc_emio_input_names[i]);
 456                 if (idx >= 0)
 457                         dbg_emio_mux_parents[i + 1] = of_clk_get_parent_name(np,
 458                                         idx);
 459         }
 460         clk = clk_register_mux(NULL, "dbg_mux", periph_parents, 4,
 461                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 4, 2, 0,
 462                         &dbgclk_lock);
 463         clk = clk_register_divider(NULL, "dbg_div", "dbg_mux", 0,
 464                         SLCR_DBG_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 465                         CLK_DIVIDER_ALLOW_ZERO, &dbgclk_lock);
 466         clk = clk_register_mux(NULL, "dbg_emio_mux", dbg_emio_mux_parents, 2,
 467                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 6, 1, 0,
 468                         &dbgclk_lock);
 469         clks[dbg_trc] = clk_register_gate(NULL, clk_output_name[dbg_trc],
 470                         "dbg_emio_mux", CLK_SET_RATE_PARENT, SLCR_DBG_CLK_CTRL,
 471                         0, 0, &dbgclk_lock);
 472         clks[dbg_apb] = clk_register_gate(NULL, clk_output_name[dbg_apb],
 473                         clk_output_name[cpu_1x], 0, SLCR_DBG_CLK_CTRL, 1, 0,
 474                         &dbgclk_lock);
 475
 476         /* One gated clock for all APER clocks. */
 477         clks[dma] = clk_register_gate(NULL, clk_output_name[dma],
 478                         clk_output_name[cpu_2x], 0, SLCR_APER_CLK_CTRL, 0, 0,
 479                         &aperclk_lock);
 480         clks[usb0_aper] = clk_register_gate(NULL, clk_output_name[usb0_aper],
 481                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 2, 0,
 482                         &aperclk_lock);
 483         clks[usb1_aper] = clk_register_gate(NULL, clk_output_name[usb1_aper],
 484                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 3, 0,
 485                         &aperclk_lock);
 486         clks[gem0_aper] = clk_register_gate(NULL, clk_output_name[gem0_aper],
 487                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 6, 0,
 488                         &aperclk_lock);
 489         clks[gem1_aper] = clk_register_gate(NULL, clk_output_name[gem1_aper],
 490                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 7, 0,
 491                         &aperclk_lock);
 492         clks[sdio0_aper] = clk_register_gate(NULL, clk_output_name[sdio0_aper],
 493                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 10, 0,
 494                         &aperclk_lock);
 495         clks[sdio1_aper] = clk_register_gate(NULL, clk_output_name[sdio1_aper],
 496                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 11, 0,
 497                         &aperclk_lock);
 498         clks[spi0_aper] = clk_register_gate(NULL, clk_output_name[spi0_aper],
 499                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 14, 0,
 500                         &aperclk_lock);
 501         clks[spi1_aper] = clk_register_gate(NULL, clk_output_name[spi1_aper],
 502                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 15, 0,
 503                         &aperclk_lock);
 504         clks[can0_aper] = clk_register_gate(NULL, clk_output_name[can0_aper],
 505                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 16, 0,
 506                         &aperclk_lock);
 507         clks[can1_aper] = clk_register_gate(NULL, clk_output_name[can1_aper],
 508                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 17, 0,
 509                         &aperclk_lock);
 510         clks[i2c0_aper] = clk_register_gate(NULL, clk_output_name[i2c0_aper],
 511                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 18, 0,
 512                         &aperclk_lock);
 513         clks[i2c1_aper] = clk_register_gate(NULL, clk_output_name[i2c1_aper],
 514                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 19, 0,
 515                         &aperclk_lock);
 516         clks[uart0_aper] = clk_register_gate(NULL, clk_output_name[uart0_aper],
 517                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 20, 0,
 518                         &aperclk_lock);
 519         clks[uart1_aper] = clk_register_gate(NULL, clk_output_name[uart1_aper],
 520                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 21, 0,
 521                         &aperclk_lock);
 522         clks[gpio_aper] = clk_register_gate(NULL, clk_output_name[gpio_aper],
 523                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 22, 0,
 524                         &aperclk_lock);
 525         clks[lqspi_aper] = clk_register_gate(NULL, clk_output_name[lqspi_aper],
 526                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 23, 0,
 527                         &aperclk_lock);
 528         clks[smc_aper] = clk_register_gate(NULL, clk_output_name[smc_aper],
 529                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 24, 0,
 530                         &aperclk_lock);
 531
 532         for (i = 0; i < ARRAY_SIZE(clks); i++) {
 533                 if (IS_ERR(clks[i])) {
 534                         pr_err("Zynq clk %d: register failed with %ld\n",
 535                                i, PTR_ERR(clks[i]));
 536                         BUG();
 537                 }
 538         }
 539
 540         clk_data.clks = clks;
 541         clk_data.clk_num = ARRAY_SIZE(clks);
 542         of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 543 }
 544
 545 CLK_OF_DECLARE(zynq_clkc, "xlnx,ps7-clkc", zynq_clk_setup);
 546
 547 void __init zynq_clock_init(void __iomem *slcr_base)
 548 {
 549         zynq_slcr_base_priv = slcr_base;
 550         of_clk_init(NULL);
 551 }