drivers/clk/zynq/clkc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Zynq clock controller
   4  *
   5  *  Copyright (C) 2012 - 2013 Xilinx
   6  *
   7  *  Sören Brinkmann <soren.brinkmann@xilinx.com>
   8  */
   9
  10 #include <linux/clk/zynq.h>
  11 #include <linux/clk.h>
  12 #include <linux/clk-provider.h>
  13 #include <linux/of.h>
  14 #include <linux/of_address.h>
  15 #include <linux/slab.h>
  16 #include <linux/string.h>
  17 #include <linux/io.h>
  18
  19 static void __iomem *zynq_clkc_base;
  20
  21 #define SLCR_ARMPLL_CTRL                (zynq_clkc_base + 0x00)
  22 #define SLCR_DDRPLL_CTRL                (zynq_clkc_base + 0x04)
  23 #define SLCR_IOPLL_CTRL                 (zynq_clkc_base + 0x08)
  24 #define SLCR_PLL_STATUS                 (zynq_clkc_base + 0x0c)
  25 #define SLCR_ARM_CLK_CTRL               (zynq_clkc_base + 0x20)
  26 #define SLCR_DDR_CLK_CTRL               (zynq_clkc_base + 0x24)
  27 #define SLCR_DCI_CLK_CTRL               (zynq_clkc_base + 0x28)
  28 #define SLCR_APER_CLK_CTRL              (zynq_clkc_base + 0x2c)
  29 #define SLCR_GEM0_CLK_CTRL              (zynq_clkc_base + 0x40)
  30 #define SLCR_GEM1_CLK_CTRL              (zynq_clkc_base + 0x44)
  31 #define SLCR_SMC_CLK_CTRL               (zynq_clkc_base + 0x48)
  32 #define SLCR_LQSPI_CLK_CTRL             (zynq_clkc_base + 0x4c)
  33 #define SLCR_SDIO_CLK_CTRL              (zynq_clkc_base + 0x50)
  34 #define SLCR_UART_CLK_CTRL              (zynq_clkc_base + 0x54)
  35 #define SLCR_SPI_CLK_CTRL               (zynq_clkc_base + 0x58)
  36 #define SLCR_CAN_CLK_CTRL               (zynq_clkc_base + 0x5c)
  37 #define SLCR_CAN_MIOCLK_CTRL            (zynq_clkc_base + 0x60)
  38 #define SLCR_DBG_CLK_CTRL               (zynq_clkc_base + 0x64)
  39 #define SLCR_PCAP_CLK_CTRL              (zynq_clkc_base + 0x68)
  40 #define SLCR_FPGA0_CLK_CTRL             (zynq_clkc_base + 0x70)
  41 #define SLCR_621_TRUE                   (zynq_clkc_base + 0xc4)
  42 #define SLCR_SWDT_CLK_SEL               (zynq_clkc_base + 0x204)
  43
  44 #define NUM_MIO_PINS    54
  45
  46 #define DBG_CLK_CTRL_CLKACT_TRC         BIT(0)
  47 #define DBG_CLK_CTRL_CPU_1XCLKACT       BIT(1)
  48
  49 enum zynq_clk {
  50         armpll, ddrpll, iopll,
  51         cpu_6or4x, cpu_3or2x, cpu_2x, cpu_1x,
  52         ddr2x, ddr3x, dci,
  53         lqspi, smc, pcap, gem0, gem1, fclk0, fclk1, fclk2, fclk3, can0, can1,
  54         sdio0, sdio1, uart0, uart1, spi0, spi1, dma,
  55         usb0_aper, usb1_aper, gem0_aper, gem1_aper,
  56         sdio0_aper, sdio1_aper, spi0_aper, spi1_aper, can0_aper, can1_aper,
  57         i2c0_aper, i2c1_aper, uart0_aper, uart1_aper, gpio_aper, lqspi_aper,
  58         smc_aper, swdt, dbg_trc, dbg_apb, clk_max};
  59
  60 static struct clk *ps_clk;
  61 static struct clk *clks[clk_max];
  62 static struct clk_onecell_data clk_data;
  63
  64 static DEFINE_SPINLOCK(armpll_lock);
  65 static DEFINE_SPINLOCK(ddrpll_lock);
  66 static DEFINE_SPINLOCK(iopll_lock);
  67 static DEFINE_SPINLOCK(armclk_lock);
  68 static DEFINE_SPINLOCK(swdtclk_lock);
  69 static DEFINE_SPINLOCK(ddrclk_lock);
  70 static DEFINE_SPINLOCK(dciclk_lock);
  71 static DEFINE_SPINLOCK(gem0clk_lock);
  72 static DEFINE_SPINLOCK(gem1clk_lock);
  73 static DEFINE_SPINLOCK(canclk_lock);
  74 static DEFINE_SPINLOCK(canmioclk_lock);
  75 static DEFINE_SPINLOCK(dbgclk_lock);
  76 static DEFINE_SPINLOCK(aperclk_lock);
  77
  78 static const char *const armpll_parents[] __initconst = {"armpll_int",
  79         "ps_clk"};
  80 static const char *const ddrpll_parents[] __initconst = {"ddrpll_int",
  81         "ps_clk"};
  82 static const char *const iopll_parents[] __initconst = {"iopll_int",
  83         "ps_clk"};
  84 static const char *gem0_mux_parents[] __initdata = {"gem0_div1", "dummy_name"};
  85 static const char *gem1_mux_parents[] __initdata = {"gem1_div1", "dummy_name"};
  86 static const char *const can0_mio_mux2_parents[] __initconst = {"can0_gate",
  87         "can0_mio_mux"};
  88 static const char *const can1_mio_mux2_parents[] __initconst = {"can1_gate",
  89         "can1_mio_mux"};
  90 static const char *dbg_emio_mux_parents[] __initdata = {"dbg_div",
  91         "dummy_name"};
  92
  93 static const char *const dbgtrc_emio_input_names[] __initconst = {
  94         "trace_emio_clk"};
  95 static const char *const gem0_emio_input_names[] __initconst = {
  96         "gem0_emio_clk"};
  97 static const char *const gem1_emio_input_names[] __initconst = {
  98         "gem1_emio_clk"};
  99 static const char *const swdt_ext_clk_input_names[] __initconst = {
 100         "swdt_ext_clk"};
 101
 102 static void __init zynq_clk_register_fclk(enum zynq_clk fclk,
 103                 const char *clk_name, void __iomem *fclk_ctrl_reg,
 104                 const char **parents, int enable)
 105 {
 106         u32 enable_reg;
 107         char *mux_name;
 108         char *div0_name;
 109         char *div1_name;
 110         spinlock_t *fclk_lock;
 111         spinlock_t *fclk_gate_lock;
 112         void __iomem *fclk_gate_reg = fclk_ctrl_reg + 8;
 113
 114         fclk_lock = kmalloc(sizeof(*fclk_lock), GFP_KERNEL);
 115         if (!fclk_lock)
 116                 goto err;
 117         fclk_gate_lock = kmalloc(sizeof(*fclk_gate_lock), GFP_KERNEL);
 118         if (!fclk_gate_lock)
 119                 goto err_fclk_gate_lock;
 120         spin_lock_init(fclk_lock);
 121         spin_lock_init(fclk_gate_lock);
 122
 123         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name);
 124         if (!mux_name)
 125                 goto err_mux_name;
 126         div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name);
 127         if (!div0_name)
 128                 goto err_div0_name;
 129         div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name);
 130         if (!div1_name)
 131                 goto err_div1_name;
 132
 133         clk_register_mux(NULL, mux_name, parents, 4,
 134                         CLK_SET_RATE_NO_REPARENT, fclk_ctrl_reg, 4, 2, 0,
 135                         fclk_lock);
 136
 137         clk_register_divider(NULL, div0_name, mux_name,
 138                         0, fclk_ctrl_reg, 8, 6, CLK_DIVIDER_ONE_BASED |
 139                         CLK_DIVIDER_ALLOW_ZERO, fclk_lock);
 140
 141         clk_register_divider(NULL, div1_name, div0_name,
 142                         CLK_SET_RATE_PARENT, fclk_ctrl_reg, 20, 6,
 143                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 144                         fclk_lock);
 145
 146         clks[fclk] = clk_register_gate(NULL, clk_name,
 147                         div1_name, CLK_SET_RATE_PARENT, fclk_gate_reg,
 148                         0, CLK_GATE_SET_TO_DISABLE, fclk_gate_lock);
 149         enable_reg = readl(fclk_gate_reg) & 1;
 150         if (enable && !enable_reg) {
 151                 if (clk_prepare_enable(clks[fclk]))
 152                         pr_warn("%s: FCLK%u enable failed\n", __func__,
 153                                         fclk - fclk0);
 154         }
 155         kfree(mux_name);
 156         kfree(div0_name);
 157         kfree(div1_name);
 158
 159         return;
 160
 161 err_div1_name:
 162         kfree(div0_name);
 163 err_div0_name:
 164         kfree(mux_name);
 165 err_mux_name:
 166         kfree(fclk_gate_lock);
 167 err_fclk_gate_lock:
 168         kfree(fclk_lock);
 169 err:
 170         clks[fclk] = ERR_PTR(-ENOMEM);
 171 }
 172
 173 static void __init zynq_clk_register_periph_clk(enum zynq_clk clk0,
 174                 enum zynq_clk clk1, const char *clk_name0,
 175                 const char *clk_name1, void __iomem *clk_ctrl,
 176                 const char **parents, unsigned int two_gates)
 177 {
 178         char *mux_name;
 179         char *div_name;
 180         spinlock_t *lock;
 181
 182         lock = kmalloc(sizeof(*lock), GFP_KERNEL);
 183         if (!lock)
 184                 goto err;
 185         spin_lock_init(lock);
 186
 187         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name0);
 188         div_name = kasprintf(GFP_KERNEL, "%s_div", clk_name0);
 189
 190         clk_register_mux(NULL, mux_name, parents, 4,
 191                         CLK_SET_RATE_NO_REPARENT, clk_ctrl, 4, 2, 0, lock);
 192
 193         clk_register_divider(NULL, div_name, mux_name, 0, clk_ctrl, 8, 6,
 194                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, lock);
 195
 196         clks[clk0] = clk_register_gate(NULL, clk_name0, div_name,
 197                         CLK_SET_RATE_PARENT, clk_ctrl, 0, 0, lock);
 198         if (two_gates)
 199                 clks[clk1] = clk_register_gate(NULL, clk_name1, div_name,
 200                                 CLK_SET_RATE_PARENT, clk_ctrl, 1, 0, lock);
 201
 202         kfree(mux_name);
 203         kfree(div_name);
 204
 205         return;
 206
 207 err:
 208         clks[clk0] = ERR_PTR(-ENOMEM);
 209         if (two_gates)
 210                 clks[clk1] = ERR_PTR(-ENOMEM);
 211 }
 212
 213 static void __init zynq_clk_setup(struct device_node *np)
 214 {
 215         int i;
 216         u32 tmp;
 217         int ret;
 218         char *clk_name;
 219         unsigned int fclk_enable = 0;
 220         const char *clk_output_name[clk_max];
 221         const char *cpu_parents[4];
 222         const char *periph_parents[4];
 223         const char *swdt_ext_clk_mux_parents[2];
 224         const char *can_mio_mux_parents[NUM_MIO_PINS];
 225         const char *dummy_nm = "dummy_name";
 226
 227         pr_info("Zynq clock init\n");
 228
 229         /* get clock output names from DT */
 230         for (i = 0; i < clk_max; i++) {
 231                 if (of_property_read_string_index(np, "clock-output-names",
 232                                   i, &clk_output_name[i])) {
 233                         pr_err("%s: clock output name not in DT\n", __func__);
 234                         BUG();
 235                 }
 236         }
 237         cpu_parents[0] = clk_output_name[armpll];
 238         cpu_parents[1] = clk_output_name[armpll];
 239         cpu_parents[2] = clk_output_name[ddrpll];
 240         cpu_parents[3] = clk_output_name[iopll];
 241         periph_parents[0] = clk_output_name[iopll];
 242         periph_parents[1] = clk_output_name[iopll];
 243         periph_parents[2] = clk_output_name[armpll];
 244         periph_parents[3] = clk_output_name[ddrpll];
 245
 246         of_property_read_u32(np, "fclk-enable", &fclk_enable);
 247
 248         /* ps_clk */
 249         ret = of_property_read_u32(np, "ps-clk-frequency", &tmp);
 250         if (ret) {
 251                 pr_warn("ps_clk frequency not specified, using 33 MHz.\n");
 252                 tmp = 33333333;
 253         }
 254         ps_clk = clk_register_fixed_rate(NULL, "ps_clk", NULL, 0, tmp);
 255
 256         /* PLLs */
 257         clk_register_zynq_pll("armpll_int", "ps_clk", SLCR_ARMPLL_CTRL,
 258                         SLCR_PLL_STATUS, 0, &armpll_lock);
 259         clks[armpll] = clk_register_mux(NULL, clk_output_name[armpll],
 260                         armpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 261                         SLCR_ARMPLL_CTRL, 4, 1, 0, &armpll_lock);
 262
 263         clk_register_zynq_pll("ddrpll_int", "ps_clk", SLCR_DDRPLL_CTRL,
 264                         SLCR_PLL_STATUS, 1, &ddrpll_lock);
 265         clks[ddrpll] = clk_register_mux(NULL, clk_output_name[ddrpll],
 266                         ddrpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 267                         SLCR_DDRPLL_CTRL, 4, 1, 0, &ddrpll_lock);
 268
 269         clk_register_zynq_pll("iopll_int", "ps_clk", SLCR_IOPLL_CTRL,
 270                         SLCR_PLL_STATUS, 2, &iopll_lock);
 271         clks[iopll] = clk_register_mux(NULL, clk_output_name[iopll],
 272                         iopll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 273                         SLCR_IOPLL_CTRL, 4, 1, 0, &iopll_lock);
 274
 275         /* CPU clocks */
 276         tmp = readl(SLCR_621_TRUE) & 1;
 277         clk_register_mux(NULL, "cpu_mux", cpu_parents, 4,
 278                         CLK_SET_RATE_NO_REPARENT, SLCR_ARM_CLK_CTRL, 4, 2, 0,
 279                         &armclk_lock);
 280         clk_register_divider(NULL, "cpu_div", "cpu_mux", 0,
 281                         SLCR_ARM_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 282                         CLK_DIVIDER_ALLOW_ZERO, &armclk_lock);
 283
 284         clks[cpu_6or4x] = clk_register_gate(NULL, clk_output_name[cpu_6or4x],
 285                         "cpu_div", CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
 286                         SLCR_ARM_CLK_CTRL, 24, 0, &armclk_lock);
 287
 288         clk_register_fixed_factor(NULL, "cpu_3or2x_div", "cpu_div", 0,
 289                         1, 2);
 290         clks[cpu_3or2x] = clk_register_gate(NULL, clk_output_name[cpu_3or2x],
 291                         "cpu_3or2x_div", CLK_IGNORE_UNUSED,
 292                         SLCR_ARM_CLK_CTRL, 25, 0, &armclk_lock);
 293
 294         clk_register_fixed_factor(NULL, "cpu_2x_div", "cpu_div", 0, 1,
 295                         2 + tmp);
 296         clks[cpu_2x] = clk_register_gate(NULL, clk_output_name[cpu_2x],
 297                         "cpu_2x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL,
 298                         26, 0, &armclk_lock);
 299         clk_prepare_enable(clks[cpu_2x]);
 300
 301         clk_register_fixed_factor(NULL, "cpu_1x_div", "cpu_div", 0, 1,
 302                         4 + 2 * tmp);
 303         clks[cpu_1x] = clk_register_gate(NULL, clk_output_name[cpu_1x],
 304                         "cpu_1x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL, 27,
 305                         0, &armclk_lock);
 306
 307         /* Timers */
 308         swdt_ext_clk_mux_parents[0] = clk_output_name[cpu_1x];
 309         for (i = 0; i < ARRAY_SIZE(swdt_ext_clk_input_names); i++) {
 310                 int idx = of_property_match_string(np, "clock-names",
 311                                 swdt_ext_clk_input_names[i]);
 312                 if (idx >= 0)
 313                         swdt_ext_clk_mux_parents[i + 1] =
 314                                 of_clk_get_parent_name(np, idx);
 315                 else
 316                         swdt_ext_clk_mux_parents[i + 1] = dummy_nm;
 317         }
 318         clks[swdt] = clk_register_mux(NULL, clk_output_name[swdt],
 319                         swdt_ext_clk_mux_parents, 2, CLK_SET_RATE_PARENT |
 320                         CLK_SET_RATE_NO_REPARENT, SLCR_SWDT_CLK_SEL, 0, 1, 0,
 321                         &swdtclk_lock);
 322
 323         /* DDR clocks */
 324         clk_register_divider(NULL, "ddr2x_div", "ddrpll", 0,
 325                         SLCR_DDR_CLK_CTRL, 26, 6, CLK_DIVIDER_ONE_BASED |
 326                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 327         clks[ddr2x] = clk_register_gate(NULL, clk_output_name[ddr2x],
 328                         "ddr2x_div", 0, SLCR_DDR_CLK_CTRL, 1, 0, &ddrclk_lock);
 329         clk_prepare_enable(clks[ddr2x]);
 330         clk_register_divider(NULL, "ddr3x_div", "ddrpll", 0,
 331                         SLCR_DDR_CLK_CTRL, 20, 6, CLK_DIVIDER_ONE_BASED |
 332                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 333         clks[ddr3x] = clk_register_gate(NULL, clk_output_name[ddr3x],
 334                         "ddr3x_div", 0, SLCR_DDR_CLK_CTRL, 0, 0, &ddrclk_lock);
 335         clk_prepare_enable(clks[ddr3x]);
 336
 337         clk_register_divider(NULL, "dci_div0", "ddrpll", 0,
 338                         SLCR_DCI_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 339                         CLK_DIVIDER_ALLOW_ZERO, &dciclk_lock);
 340         clk_register_divider(NULL, "dci_div1", "dci_div0",
 341                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 20, 6,
 342                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 343                         &dciclk_lock);
 344         clks[dci] = clk_register_gate(NULL, clk_output_name[dci], "dci_div1",
 345                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 0, 0,
 346                         &dciclk_lock);
 347         clk_prepare_enable(clks[dci]);
 348
 349         /* Peripheral clocks */
 350         for (i = fclk0; i <= fclk3; i++) {
 351                 int enable = !!(fclk_enable & BIT(i - fclk0));
 352                 zynq_clk_register_fclk(i, clk_output_name[i],
 353                                 SLCR_FPGA0_CLK_CTRL + 0x10 * (i - fclk0),
 354                                 periph_parents, enable);
 355         }
 356
 357         zynq_clk_register_periph_clk(lqspi, 0, clk_output_name[lqspi], NULL,
 358                         SLCR_LQSPI_CLK_CTRL, periph_parents, 0);
 359
 360         zynq_clk_register_periph_clk(smc, 0, clk_output_name[smc], NULL,
 361                         SLCR_SMC_CLK_CTRL, periph_parents, 0);
 362
 363         zynq_clk_register_periph_clk(pcap, 0, clk_output_name[pcap], NULL,
 364                         SLCR_PCAP_CLK_CTRL, periph_parents, 0);
 365
 366         zynq_clk_register_periph_clk(sdio0, sdio1, clk_output_name[sdio0],
 367                         clk_output_name[sdio1], SLCR_SDIO_CLK_CTRL,
 368                         periph_parents, 1);
 369
 370         zynq_clk_register_periph_clk(uart0, uart1, clk_output_name[uart0],
 371                         clk_output_name[uart1], SLCR_UART_CLK_CTRL,
 372                         periph_parents, 1);
 373
 374         zynq_clk_register_periph_clk(spi0, spi1, clk_output_name[spi0],
 375                         clk_output_name[spi1], SLCR_SPI_CLK_CTRL,
 376                         periph_parents, 1);
 377
 378         for (i = 0; i < ARRAY_SIZE(gem0_emio_input_names); i++) {
 379                 int idx = of_property_match_string(np, "clock-names",
 380                                 gem0_emio_input_names[i]);
 381                 if (idx >= 0)
 382                         gem0_mux_parents[i + 1] = of_clk_get_parent_name(np,
 383                                         idx);
 384         }
 385         clk_register_mux(NULL, "gem0_mux", periph_parents, 4,
 386                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM0_CLK_CTRL, 4, 2, 0,
 387                         &gem0clk_lock);
 388         clk_register_divider(NULL, "gem0_div0", "gem0_mux", 0,
 389                         SLCR_GEM0_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 390                         CLK_DIVIDER_ALLOW_ZERO, &gem0clk_lock);
 391         clk_register_divider(NULL, "gem0_div1", "gem0_div0",
 392                         CLK_SET_RATE_PARENT, SLCR_GEM0_CLK_CTRL, 20, 6,
 393                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 394                         &gem0clk_lock);
 395         clk_register_mux(NULL, "gem0_emio_mux", gem0_mux_parents, 2,
 396                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 397                         SLCR_GEM0_CLK_CTRL, 6, 1, 0,
 398                         &gem0clk_lock);
 399         clks[gem0] = clk_register_gate(NULL, clk_output_name[gem0],
 400                         "gem0_emio_mux", CLK_SET_RATE_PARENT,
 401                         SLCR_GEM0_CLK_CTRL, 0, 0, &gem0clk_lock);
 402
 403         for (i = 0; i < ARRAY_SIZE(gem1_emio_input_names); i++) {
 404                 int idx = of_property_match_string(np, "clock-names",
 405                                 gem1_emio_input_names[i]);
 406                 if (idx >= 0)
 407                         gem1_mux_parents[i + 1] = of_clk_get_parent_name(np,
 408                                         idx);
 409         }
 410         clk_register_mux(NULL, "gem1_mux", periph_parents, 4,
 411                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM1_CLK_CTRL, 4, 2, 0,
 412                         &gem1clk_lock);
 413         clk_register_divider(NULL, "gem1_div0", "gem1_mux", 0,
 414                         SLCR_GEM1_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 415                         CLK_DIVIDER_ALLOW_ZERO, &gem1clk_lock);
 416         clk_register_divider(NULL, "gem1_div1", "gem1_div0",
 417                         CLK_SET_RATE_PARENT, SLCR_GEM1_CLK_CTRL, 20, 6,
 418                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 419                         &gem1clk_lock);
 420         clk_register_mux(NULL, "gem1_emio_mux", gem1_mux_parents, 2,
 421                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 422                         SLCR_GEM1_CLK_CTRL, 6, 1, 0,
 423                         &gem1clk_lock);
 424         clks[gem1] = clk_register_gate(NULL, clk_output_name[gem1],
 425                         "gem1_emio_mux", CLK_SET_RATE_PARENT,
 426                         SLCR_GEM1_CLK_CTRL, 0, 0, &gem1clk_lock);
 427
 428         tmp = strlen("mio_clk_00x");
 429         clk_name = kmalloc(tmp, GFP_KERNEL);
 430         for (i = 0; i < NUM_MIO_PINS; i++) {
 431                 int idx;
 432
 433                 snprintf(clk_name, tmp, "mio_clk_%2.2d", i);
 434                 idx = of_property_match_string(np, "clock-names", clk_name);
 435                 if (idx >= 0)
 436                         can_mio_mux_parents[i] = of_clk_get_parent_name(np,
 437                                                 idx);
 438                 else
 439                         can_mio_mux_parents[i] = dummy_nm;
 440         }
 441         kfree(clk_name);
 442         clk_register_mux(NULL, "can_mux", periph_parents, 4,
 443                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_CLK_CTRL, 4, 2, 0,
 444                         &canclk_lock);
 445         clk_register_divider(NULL, "can_div0", "can_mux", 0,
 446                         SLCR_CAN_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 447                         CLK_DIVIDER_ALLOW_ZERO, &canclk_lock);
 448         clk_register_divider(NULL, "can_div1", "can_div0",
 449                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 20, 6,
 450                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 451                         &canclk_lock);
 452         clk_register_gate(NULL, "can0_gate", "can_div1",
 453                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 0, 0,
 454                         &canclk_lock);
 455         clk_register_gate(NULL, "can1_gate", "can_div1",
 456                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 1, 0,
 457                         &canclk_lock);
 458         clk_register_mux(NULL, "can0_mio_mux",
 459                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 460                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 0, 6, 0,
 461                         &canmioclk_lock);
 462         clk_register_mux(NULL, "can1_mio_mux",
 463                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 464                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 16, 6,
 465                         0, &canmioclk_lock);
 466         clks[can0] = clk_register_mux(NULL, clk_output_name[can0],
 467                         can0_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 468                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 6, 1, 0,
 469                         &canmioclk_lock);
 470         clks[can1] = clk_register_mux(NULL, clk_output_name[can1],
 471                         can1_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 472                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 22, 1,
 473                         0, &canmioclk_lock);
 474
 475         for (i = 0; i < ARRAY_SIZE(dbgtrc_emio_input_names); i++) {
 476                 int idx = of_property_match_string(np, "clock-names",
 477                                 dbgtrc_emio_input_names[i]);
 478                 if (idx >= 0)
 479                         dbg_emio_mux_parents[i + 1] = of_clk_get_parent_name(np,
 480                                         idx);
 481         }
 482         clk_register_mux(NULL, "dbg_mux", periph_parents, 4,
 483                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 4, 2, 0,
 484                         &dbgclk_lock);
 485         clk_register_divider(NULL, "dbg_div", "dbg_mux", 0,
 486                         SLCR_DBG_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 487                         CLK_DIVIDER_ALLOW_ZERO, &dbgclk_lock);
 488         clk_register_mux(NULL, "dbg_emio_mux", dbg_emio_mux_parents, 2,
 489                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 6, 1, 0,
 490                         &dbgclk_lock);
 491         clks[dbg_trc] = clk_register_gate(NULL, clk_output_name[dbg_trc],
 492                         "dbg_emio_mux", CLK_SET_RATE_PARENT, SLCR_DBG_CLK_CTRL,
 493                         0, 0, &dbgclk_lock);
 494         clks[dbg_apb] = clk_register_gate(NULL, clk_output_name[dbg_apb],
 495                         clk_output_name[cpu_1x], 0, SLCR_DBG_CLK_CTRL, 1, 0,
 496                         &dbgclk_lock);
 497
 498         /* leave debug clocks in the state the bootloader set them up to */
 499         tmp = readl(SLCR_DBG_CLK_CTRL);
 500         if (tmp & DBG_CLK_CTRL_CLKACT_TRC)
 501                 if (clk_prepare_enable(clks[dbg_trc]))
 502                         pr_warn("%s: trace clk enable failed\n", __func__);
 503         if (tmp & DBG_CLK_CTRL_CPU_1XCLKACT)
 504                 if (clk_prepare_enable(clks[dbg_apb]))
 505                         pr_warn("%s: debug APB clk enable failed\n", __func__);
 506
 507         /* One gated clock for all APER clocks. */
 508         clks[dma] = clk_register_gate(NULL, clk_output_name[dma],
 509                         clk_output_name[cpu_2x], 0, SLCR_APER_CLK_CTRL, 0, 0,
 510                         &aperclk_lock);
 511         clks[usb0_aper] = clk_register_gate(NULL, clk_output_name[usb0_aper],
 512                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 2, 0,
 513                         &aperclk_lock);
 514         clks[usb1_aper] = clk_register_gate(NULL, clk_output_name[usb1_aper],
 515                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 3, 0,
 516                         &aperclk_lock);
 517         clks[gem0_aper] = clk_register_gate(NULL, clk_output_name[gem0_aper],
 518                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 6, 0,
 519                         &aperclk_lock);
 520         clks[gem1_aper] = clk_register_gate(NULL, clk_output_name[gem1_aper],
 521                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 7, 0,
 522                         &aperclk_lock);
 523         clks[sdio0_aper] = clk_register_gate(NULL, clk_output_name[sdio0_aper],
 524                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 10, 0,
 525                         &aperclk_lock);
 526         clks[sdio1_aper] = clk_register_gate(NULL, clk_output_name[sdio1_aper],
 527                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 11, 0,
 528                         &aperclk_lock);
 529         clks[spi0_aper] = clk_register_gate(NULL, clk_output_name[spi0_aper],
 530                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 14, 0,
 531                         &aperclk_lock);
 532         clks[spi1_aper] = clk_register_gate(NULL, clk_output_name[spi1_aper],
 533                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 15, 0,
 534                         &aperclk_lock);
 535         clks[can0_aper] = clk_register_gate(NULL, clk_output_name[can0_aper],
 536                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 16, 0,
 537                         &aperclk_lock);
 538         clks[can1_aper] = clk_register_gate(NULL, clk_output_name[can1_aper],
 539                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 17, 0,
 540                         &aperclk_lock);
 541         clks[i2c0_aper] = clk_register_gate(NULL, clk_output_name[i2c0_aper],
 542                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 18, 0,
 543                         &aperclk_lock);
 544         clks[i2c1_aper] = clk_register_gate(NULL, clk_output_name[i2c1_aper],
 545                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 19, 0,
 546                         &aperclk_lock);
 547         clks[uart0_aper] = clk_register_gate(NULL, clk_output_name[uart0_aper],
 548                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 20, 0,
 549                         &aperclk_lock);
 550         clks[uart1_aper] = clk_register_gate(NULL, clk_output_name[uart1_aper],
 551                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 21, 0,
 552                         &aperclk_lock);
 553         clks[gpio_aper] = clk_register_gate(NULL, clk_output_name[gpio_aper],
 554                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 22, 0,
 555                         &aperclk_lock);
 556         clks[lqspi_aper] = clk_register_gate(NULL, clk_output_name[lqspi_aper],
 557                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 23, 0,
 558                         &aperclk_lock);
 559         clks[smc_aper] = clk_register_gate(NULL, clk_output_name[smc_aper],
 560                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 24, 0,
 561                         &aperclk_lock);
 562
 563         for (i = 0; i < ARRAY_SIZE(clks); i++) {
 564                 if (IS_ERR(clks[i])) {
 565                         pr_err("Zynq clk %d: register failed with %ld\n",
 566                                i, PTR_ERR(clks[i]));
 567                         BUG();
 568                 }
 569         }
 570
 571         clk_data.clks = clks;
 572         clk_data.clk_num = ARRAY_SIZE(clks);
 573         of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 574 }
 575
 576 CLK_OF_DECLARE(zynq_clkc, "xlnx,ps7-clkc", zynq_clk_setup);
 577
 578 void __init zynq_clock_init(void)
 579 {
 580         struct device_node *np;
 581         struct device_node *slcr;
 582         struct resource res;
 583
 584         np = of_find_compatible_node(NULL, NULL, "xlnx,ps7-clkc");
 585         if (!np) {
 586                 pr_err("%s: clkc node not found\n", __func__);
 587                 goto np_err;
 588         }
 589
 590         if (of_address_to_resource(np, 0, &res)) {
 591                 pr_err("%pOFn: failed to get resource\n", np);
 592                 goto np_err;
 593         }
 594
 595         slcr = of_get_parent(np);
 596
 597         if (slcr->data) {
 598                 zynq_clkc_base = (__force void __iomem *)slcr->data + res.start;
 599         } else {
 600                 pr_err("%pOFn: Unable to get I/O memory\n", np);
 601                 of_node_put(slcr);
 602                 goto np_err;
 603         }
 604
 605         pr_info("%s: clkc starts at %p\n", __func__, zynq_clkc_base);
 606
 607         of_node_put(slcr);
 608         of_node_put(np);
 609
 610         return;
 611
 612 np_err:
 613         of_node_put(np);
 614         BUG();
 615 }