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/of_address.h>
  25 #include <linux/slab.h>
  26 #include <linux/string.h>
  27 #include <linux/io.h>
  28
  29 static void __iomem *zynq_clkc_base;
  30
  31 #define SLCR_ARMPLL_CTRL                (zynq_clkc_base + 0x00)
  32 #define SLCR_DDRPLL_CTRL                (zynq_clkc_base + 0x04)
  33 #define SLCR_IOPLL_CTRL                 (zynq_clkc_base + 0x08)
  34 #define SLCR_PLL_STATUS                 (zynq_clkc_base + 0x0c)
  35 #define SLCR_ARM_CLK_CTRL               (zynq_clkc_base + 0x20)
  36 #define SLCR_DDR_CLK_CTRL               (zynq_clkc_base + 0x24)
  37 #define SLCR_DCI_CLK_CTRL               (zynq_clkc_base + 0x28)
  38 #define SLCR_APER_CLK_CTRL              (zynq_clkc_base + 0x2c)
  39 #define SLCR_GEM0_CLK_CTRL              (zynq_clkc_base + 0x40)
  40 #define SLCR_GEM1_CLK_CTRL              (zynq_clkc_base + 0x44)
  41 #define SLCR_SMC_CLK_CTRL               (zynq_clkc_base + 0x48)
  42 #define SLCR_LQSPI_CLK_CTRL             (zynq_clkc_base + 0x4c)
  43 #define SLCR_SDIO_CLK_CTRL              (zynq_clkc_base + 0x50)
  44 #define SLCR_UART_CLK_CTRL              (zynq_clkc_base + 0x54)
  45 #define SLCR_SPI_CLK_CTRL               (zynq_clkc_base + 0x58)
  46 #define SLCR_CAN_CLK_CTRL               (zynq_clkc_base + 0x5c)
  47 #define SLCR_CAN_MIOCLK_CTRL            (zynq_clkc_base + 0x60)
  48 #define SLCR_DBG_CLK_CTRL               (zynq_clkc_base + 0x64)
  49 #define SLCR_PCAP_CLK_CTRL              (zynq_clkc_base + 0x68)
  50 #define SLCR_FPGA0_CLK_CTRL             (zynq_clkc_base + 0x70)
  51 #define SLCR_621_TRUE                   (zynq_clkc_base + 0xc4)
  52 #define SLCR_SWDT_CLK_SEL               (zynq_clkc_base + 0x204)
  53
  54 #define NUM_MIO_PINS    54
  55
  56 #define DBG_CLK_CTRL_CLKACT_TRC         BIT(0)
  57 #define DBG_CLK_CTRL_CPU_1XCLKACT       BIT(1)
  58
  59 enum zynq_clk {
  60         armpll, ddrpll, iopll,
  61         cpu_6or4x, cpu_3or2x, cpu_2x, cpu_1x,
  62         ddr2x, ddr3x, dci,
  63         lqspi, smc, pcap, gem0, gem1, fclk0, fclk1, fclk2, fclk3, can0, can1,
  64         sdio0, sdio1, uart0, uart1, spi0, spi1, dma,
  65         usb0_aper, usb1_aper, gem0_aper, gem1_aper,
  66         sdio0_aper, sdio1_aper, spi0_aper, spi1_aper, can0_aper, can1_aper,
  67         i2c0_aper, i2c1_aper, uart0_aper, uart1_aper, gpio_aper, lqspi_aper,
  68         smc_aper, swdt, dbg_trc, dbg_apb, clk_max};
  69
  70 static struct clk *ps_clk;
  71 static struct clk *clks[clk_max];
  72 static struct clk_onecell_data clk_data;
  73
  74 static DEFINE_SPINLOCK(armpll_lock);
  75 static DEFINE_SPINLOCK(ddrpll_lock);
  76 static DEFINE_SPINLOCK(iopll_lock);
  77 static DEFINE_SPINLOCK(armclk_lock);
  78 static DEFINE_SPINLOCK(swdtclk_lock);
  79 static DEFINE_SPINLOCK(ddrclk_lock);
  80 static DEFINE_SPINLOCK(dciclk_lock);
  81 static DEFINE_SPINLOCK(gem0clk_lock);
  82 static DEFINE_SPINLOCK(gem1clk_lock);
  83 static DEFINE_SPINLOCK(canclk_lock);
  84 static DEFINE_SPINLOCK(canmioclk_lock);
  85 static DEFINE_SPINLOCK(dbgclk_lock);
  86 static DEFINE_SPINLOCK(aperclk_lock);
  87
  88 static const char dummy_nm[] __initconst = "dummy_name";
  89
  90 static const char *armpll_parents[] __initdata = {"armpll_int", "ps_clk"};
  91 static const char *ddrpll_parents[] __initdata = {"ddrpll_int", "ps_clk"};
  92 static const char *iopll_parents[] __initdata = {"iopll_int", "ps_clk"};
  93 static const char *gem0_mux_parents[] __initdata = {"gem0_div1", dummy_nm};
  94 static const char *gem1_mux_parents[] __initdata = {"gem1_div1", dummy_nm};
  95 static const char *can0_mio_mux2_parents[] __initdata = {"can0_gate",
  96         "can0_mio_mux"};
  97 static const char *can1_mio_mux2_parents[] __initdata = {"can1_gate",
  98         "can1_mio_mux"};
  99 static const char *dbg_emio_mux_parents[] __initdata = {"dbg_div",
 100         dummy_nm};
 101
 102 static const char *dbgtrc_emio_input_names[] __initdata = {"trace_emio_clk"};
 103 static const char *gem0_emio_input_names[] __initdata = {"gem0_emio_clk"};
 104 static const char *gem1_emio_input_names[] __initdata = {"gem1_emio_clk"};
 105 static const char *swdt_ext_clk_input_names[] __initdata = {"swdt_ext_clk"};
 106
 107 static void __init zynq_clk_register_fclk(enum zynq_clk fclk,
 108                 const char *clk_name, void __iomem *fclk_ctrl_reg,
 109                 const char **parents, int enable)
 110 {
 111         struct clk *clk;
 112         u32 enable_reg;
 113         char *mux_name;
 114         char *div0_name;
 115         char *div1_name;
 116         spinlock_t *fclk_lock;
 117         spinlock_t *fclk_gate_lock;
 118         void __iomem *fclk_gate_reg = fclk_ctrl_reg + 8;
 119
 120         fclk_lock = kmalloc(sizeof(*fclk_lock), GFP_KERNEL);
 121         if (!fclk_lock)
 122                 goto err;
 123         fclk_gate_lock = kmalloc(sizeof(*fclk_gate_lock), GFP_KERNEL);
 124         if (!fclk_gate_lock)
 125                 goto err_fclk_gate_lock;
 126         spin_lock_init(fclk_lock);
 127         spin_lock_init(fclk_gate_lock);
 128
 129         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name);
 130         if (!mux_name)
 131                 goto err_mux_name;
 132         div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name);
 133         if (!div0_name)
 134                 goto err_div0_name;
 135         div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name);
 136         if (!div1_name)
 137                 goto err_div1_name;
 138
 139         clk = clk_register_mux(NULL, mux_name, parents, 4,
 140                         CLK_SET_RATE_NO_REPARENT, fclk_ctrl_reg, 4, 2, 0,
 141                         fclk_lock);
 142
 143         clk = clk_register_divider(NULL, div0_name, mux_name,
 144                         0, fclk_ctrl_reg, 8, 6, CLK_DIVIDER_ONE_BASED |
 145                         CLK_DIVIDER_ALLOW_ZERO, fclk_lock);
 146
 147         clk = clk_register_divider(NULL, div1_name, div0_name,
 148                         CLK_SET_RATE_PARENT, fclk_ctrl_reg, 20, 6,
 149                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 150                         fclk_lock);
 151
 152         clks[fclk] = clk_register_gate(NULL, clk_name,
 153                         div1_name, CLK_SET_RATE_PARENT, fclk_gate_reg,
 154                         0, CLK_GATE_SET_TO_DISABLE, fclk_gate_lock);
 155         enable_reg = clk_readl(fclk_gate_reg) & 1;
 156         if (enable && !enable_reg) {
 157                 if (clk_prepare_enable(clks[fclk]))
 158                         pr_warn("%s: FCLK%u enable failed\n", __func__,
 159                                         fclk - fclk0);
 160         }
 161         kfree(mux_name);
 162         kfree(div0_name);
 163         kfree(div1_name);
 164
 165         return;
 166
 167 err_div1_name:
 168         kfree(div0_name);
 169 err_div0_name:
 170         kfree(mux_name);
 171 err_mux_name:
 172         kfree(fclk_gate_lock);
 173 err_fclk_gate_lock:
 174         kfree(fclk_lock);
 175 err:
 176         clks[fclk] = ERR_PTR(-ENOMEM);
 177 }
 178
 179 static void __init zynq_clk_register_periph_clk(enum zynq_clk clk0,
 180                 enum zynq_clk clk1, const char *clk_name0,
 181                 const char *clk_name1, void __iomem *clk_ctrl,
 182                 const char **parents, unsigned int two_gates)
 183 {
 184         struct clk *clk;
 185         char *mux_name;
 186         char *div_name;
 187         spinlock_t *lock;
 188
 189         lock = kmalloc(sizeof(*lock), GFP_KERNEL);
 190         if (!lock)
 191                 goto err;
 192         spin_lock_init(lock);
 193
 194         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name0);
 195         div_name = kasprintf(GFP_KERNEL, "%s_div", clk_name0);
 196
 197         clk = clk_register_mux(NULL, mux_name, parents, 4,
 198                         CLK_SET_RATE_NO_REPARENT, clk_ctrl, 4, 2, 0, lock);
 199
 200         clk = clk_register_divider(NULL, div_name, mux_name, 0, clk_ctrl, 8, 6,
 201                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, lock);
 202
 203         clks[clk0] = clk_register_gate(NULL, clk_name0, div_name,
 204                         CLK_SET_RATE_PARENT, clk_ctrl, 0, 0, lock);
 205         if (two_gates)
 206                 clks[clk1] = clk_register_gate(NULL, clk_name1, div_name,
 207                                 CLK_SET_RATE_PARENT, clk_ctrl, 1, 0, lock);
 208
 209         kfree(mux_name);
 210         kfree(div_name);
 211
 212         return;
 213
 214 err:
 215         clks[clk0] = ERR_PTR(-ENOMEM);
 216         if (two_gates)
 217                 clks[clk1] = ERR_PTR(-ENOMEM);
 218 }
 219
 220 static void __init zynq_clk_setup(struct device_node *np)
 221 {
 222         int i;
 223         u32 tmp;
 224         int ret;
 225         struct clk *clk;
 226         char *clk_name;
 227         unsigned int fclk_enable = 0;
 228         const char *clk_output_name[clk_max];
 229         const char *cpu_parents[4];
 230         const char *periph_parents[4];
 231         const char *swdt_ext_clk_mux_parents[2];
 232         const char *can_mio_mux_parents[NUM_MIO_PINS];
 233
 234         pr_info("Zynq clock init\n");
 235
 236         /* get clock output names from DT */
 237         for (i = 0; i < clk_max; i++) {
 238                 if (of_property_read_string_index(np, "clock-output-names",
 239                                   i, &clk_output_name[i])) {
 240                         pr_err("%s: clock output name not in DT\n", __func__);
 241                         BUG();
 242                 }
 243         }
 244         cpu_parents[0] = clk_output_name[armpll];
 245         cpu_parents[1] = clk_output_name[armpll];
 246         cpu_parents[2] = clk_output_name[ddrpll];
 247         cpu_parents[3] = clk_output_name[iopll];
 248         periph_parents[0] = clk_output_name[iopll];
 249         periph_parents[1] = clk_output_name[iopll];
 250         periph_parents[2] = clk_output_name[armpll];
 251         periph_parents[3] = clk_output_name[ddrpll];
 252
 253         of_property_read_u32(np, "fclk-enable", &fclk_enable);
 254
 255         /* ps_clk */
 256         ret = of_property_read_u32(np, "ps-clk-frequency", &tmp);
 257         if (ret) {
 258                 pr_warn("ps_clk frequency not specified, using 33 MHz.\n");
 259                 tmp = 33333333;
 260         }
 261         ps_clk = clk_register_fixed_rate(NULL, "ps_clk", NULL, CLK_IS_ROOT,
 262                         tmp);
 263
 264         /* PLLs */
 265         clk = clk_register_zynq_pll("armpll_int", "ps_clk", SLCR_ARMPLL_CTRL,
 266                         SLCR_PLL_STATUS, 0, &armpll_lock);
 267         clks[armpll] = clk_register_mux(NULL, clk_output_name[armpll],
 268                         armpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 269                         SLCR_ARMPLL_CTRL, 4, 1, 0, &armpll_lock);
 270
 271         clk = clk_register_zynq_pll("ddrpll_int", "ps_clk", SLCR_DDRPLL_CTRL,
 272                         SLCR_PLL_STATUS, 1, &ddrpll_lock);
 273         clks[ddrpll] = clk_register_mux(NULL, clk_output_name[ddrpll],
 274                         ddrpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 275                         SLCR_DDRPLL_CTRL, 4, 1, 0, &ddrpll_lock);
 276
 277         clk = clk_register_zynq_pll("iopll_int", "ps_clk", SLCR_IOPLL_CTRL,
 278                         SLCR_PLL_STATUS, 2, &iopll_lock);
 279         clks[iopll] = clk_register_mux(NULL, clk_output_name[iopll],
 280                         iopll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 281                         SLCR_IOPLL_CTRL, 4, 1, 0, &iopll_lock);
 282
 283         /* CPU clocks */
 284         tmp = clk_readl(SLCR_621_TRUE) & 1;
 285         clk = clk_register_mux(NULL, "cpu_mux", cpu_parents, 4,
 286                         CLK_SET_RATE_NO_REPARENT, SLCR_ARM_CLK_CTRL, 4, 2, 0,
 287                         &armclk_lock);
 288         clk = clk_register_divider(NULL, "cpu_div", "cpu_mux", 0,
 289                         SLCR_ARM_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 290                         CLK_DIVIDER_ALLOW_ZERO, &armclk_lock);
 291
 292         clks[cpu_6or4x] = clk_register_gate(NULL, clk_output_name[cpu_6or4x],
 293                         "cpu_div", CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
 294                         SLCR_ARM_CLK_CTRL, 24, 0, &armclk_lock);
 295
 296         clk = clk_register_fixed_factor(NULL, "cpu_3or2x_div", "cpu_div", 0,
 297                         1, 2);
 298         clks[cpu_3or2x] = clk_register_gate(NULL, clk_output_name[cpu_3or2x],
 299                         "cpu_3or2x_div", CLK_IGNORE_UNUSED,
 300                         SLCR_ARM_CLK_CTRL, 25, 0, &armclk_lock);
 301
 302         clk = clk_register_fixed_factor(NULL, "cpu_2x_div", "cpu_div", 0, 1,
 303                         2 + tmp);
 304         clks[cpu_2x] = clk_register_gate(NULL, clk_output_name[cpu_2x],
 305                         "cpu_2x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL,
 306                         26, 0, &armclk_lock);
 307
 308         clk = clk_register_fixed_factor(NULL, "cpu_1x_div", "cpu_div", 0, 1,
 309                         4 + 2 * tmp);
 310         clks[cpu_1x] = clk_register_gate(NULL, clk_output_name[cpu_1x],
 311                         "cpu_1x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL, 27,
 312                         0, &armclk_lock);
 313
 314         /* Timers */
 315         swdt_ext_clk_mux_parents[0] = clk_output_name[cpu_1x];
 316         for (i = 0; i < ARRAY_SIZE(swdt_ext_clk_input_names); i++) {
 317                 int idx = of_property_match_string(np, "clock-names",
 318                                 swdt_ext_clk_input_names[i]);
 319                 if (idx >= 0)
 320                         swdt_ext_clk_mux_parents[i + 1] =
 321                                 of_clk_get_parent_name(np, idx);
 322                 else
 323                         swdt_ext_clk_mux_parents[i + 1] = dummy_nm;
 324         }
 325         clks[swdt] = clk_register_mux(NULL, clk_output_name[swdt],
 326                         swdt_ext_clk_mux_parents, 2, CLK_SET_RATE_PARENT |
 327                         CLK_SET_RATE_NO_REPARENT, SLCR_SWDT_CLK_SEL, 0, 1, 0,
 328                         &swdtclk_lock);
 329
 330         /* DDR clocks */
 331         clk = clk_register_divider(NULL, "ddr2x_div", "ddrpll", 0,
 332                         SLCR_DDR_CLK_CTRL, 26, 6, CLK_DIVIDER_ONE_BASED |
 333                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 334         clks[ddr2x] = clk_register_gate(NULL, clk_output_name[ddr2x],
 335                         "ddr2x_div", 0, SLCR_DDR_CLK_CTRL, 1, 0, &ddrclk_lock);
 336         clk_prepare_enable(clks[ddr2x]);
 337         clk = clk_register_divider(NULL, "ddr3x_div", "ddrpll", 0,
 338                         SLCR_DDR_CLK_CTRL, 20, 6, CLK_DIVIDER_ONE_BASED |
 339                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 340         clks[ddr3x] = clk_register_gate(NULL, clk_output_name[ddr3x],
 341                         "ddr3x_div", 0, SLCR_DDR_CLK_CTRL, 0, 0, &ddrclk_lock);
 342         clk_prepare_enable(clks[ddr3x]);
 343
 344         clk = clk_register_divider(NULL, "dci_div0", "ddrpll", 0,
 345                         SLCR_DCI_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 346                         CLK_DIVIDER_ALLOW_ZERO, &dciclk_lock);
 347         clk = clk_register_divider(NULL, "dci_div1", "dci_div0",
 348                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 20, 6,
 349                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 350                         &dciclk_lock);
 351         clks[dci] = clk_register_gate(NULL, clk_output_name[dci], "dci_div1",
 352                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 0, 0,
 353                         &dciclk_lock);
 354         clk_prepare_enable(clks[dci]);
 355
 356         /* Peripheral clocks */
 357         for (i = fclk0; i <= fclk3; i++) {
 358                 int enable = !!(fclk_enable & BIT(i - fclk0));
 359                 zynq_clk_register_fclk(i, clk_output_name[i],
 360                                 SLCR_FPGA0_CLK_CTRL + 0x10 * (i - fclk0),
 361                                 periph_parents, enable);
 362         }
 363
 364         zynq_clk_register_periph_clk(lqspi, 0, clk_output_name[lqspi], NULL,
 365                         SLCR_LQSPI_CLK_CTRL, periph_parents, 0);
 366
 367         zynq_clk_register_periph_clk(smc, 0, clk_output_name[smc], NULL,
 368                         SLCR_SMC_CLK_CTRL, periph_parents, 0);
 369
 370         zynq_clk_register_periph_clk(pcap, 0, clk_output_name[pcap], NULL,
 371                         SLCR_PCAP_CLK_CTRL, periph_parents, 0);
 372
 373         zynq_clk_register_periph_clk(sdio0, sdio1, clk_output_name[sdio0],
 374                         clk_output_name[sdio1], SLCR_SDIO_CLK_CTRL,
 375                         periph_parents, 1);
 376
 377         zynq_clk_register_periph_clk(uart0, uart1, clk_output_name[uart0],
 378                         clk_output_name[uart1], SLCR_UART_CLK_CTRL,
 379                         periph_parents, 1);
 380
 381         zynq_clk_register_periph_clk(spi0, spi1, clk_output_name[spi0],
 382                         clk_output_name[spi1], SLCR_SPI_CLK_CTRL,
 383                         periph_parents, 1);
 384
 385         for (i = 0; i < ARRAY_SIZE(gem0_emio_input_names); i++) {
 386                 int idx = of_property_match_string(np, "clock-names",
 387                                 gem0_emio_input_names[i]);
 388                 if (idx >= 0)
 389                         gem0_mux_parents[i + 1] = of_clk_get_parent_name(np,
 390                                         idx);
 391         }
 392         clk = clk_register_mux(NULL, "gem0_mux", periph_parents, 4,
 393                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM0_CLK_CTRL, 4, 2, 0,
 394                         &gem0clk_lock);
 395         clk = clk_register_divider(NULL, "gem0_div0", "gem0_mux", 0,
 396                         SLCR_GEM0_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 397                         CLK_DIVIDER_ALLOW_ZERO, &gem0clk_lock);
 398         clk = clk_register_divider(NULL, "gem0_div1", "gem0_div0",
 399                         CLK_SET_RATE_PARENT, SLCR_GEM0_CLK_CTRL, 20, 6,
 400                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 401                         &gem0clk_lock);
 402         clk = clk_register_mux(NULL, "gem0_emio_mux", gem0_mux_parents, 2,
 403                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 404                         SLCR_GEM0_CLK_CTRL, 6, 1, 0,
 405                         &gem0clk_lock);
 406         clks[gem0] = clk_register_gate(NULL, clk_output_name[gem0],
 407                         "gem0_emio_mux", CLK_SET_RATE_PARENT,
 408                         SLCR_GEM0_CLK_CTRL, 0, 0, &gem0clk_lock);
 409
 410         for (i = 0; i < ARRAY_SIZE(gem1_emio_input_names); i++) {
 411                 int idx = of_property_match_string(np, "clock-names",
 412                                 gem1_emio_input_names[i]);
 413                 if (idx >= 0)
 414                         gem1_mux_parents[i + 1] = of_clk_get_parent_name(np,
 415                                         idx);
 416         }
 417         clk = clk_register_mux(NULL, "gem1_mux", periph_parents, 4,
 418                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM1_CLK_CTRL, 4, 2, 0,
 419                         &gem1clk_lock);
 420         clk = clk_register_divider(NULL, "gem1_div0", "gem1_mux", 0,
 421                         SLCR_GEM1_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 422                         CLK_DIVIDER_ALLOW_ZERO, &gem1clk_lock);
 423         clk = clk_register_divider(NULL, "gem1_div1", "gem1_div0",
 424                         CLK_SET_RATE_PARENT, SLCR_GEM1_CLK_CTRL, 20, 6,
 425                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 426                         &gem1clk_lock);
 427         clk = clk_register_mux(NULL, "gem1_emio_mux", gem1_mux_parents, 2,
 428                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 429                         SLCR_GEM1_CLK_CTRL, 6, 1, 0,
 430                         &gem1clk_lock);
 431         clks[gem1] = clk_register_gate(NULL, clk_output_name[gem1],
 432                         "gem1_emio_mux", CLK_SET_RATE_PARENT,
 433                         SLCR_GEM1_CLK_CTRL, 0, 0, &gem1clk_lock);
 434
 435         tmp = strlen("mio_clk_00x");
 436         clk_name = kmalloc(tmp, GFP_KERNEL);
 437         for (i = 0; i < NUM_MIO_PINS; i++) {
 438                 int idx;
 439
 440                 snprintf(clk_name, tmp, "mio_clk_%2.2d", i);
 441                 idx = of_property_match_string(np, "clock-names", clk_name);
 442                 if (idx >= 0)
 443                         can_mio_mux_parents[i] = of_clk_get_parent_name(np,
 444                                                 idx);
 445                 else
 446                         can_mio_mux_parents[i] = dummy_nm;
 447         }
 448         kfree(clk_name);
 449         clk = clk_register_mux(NULL, "can_mux", periph_parents, 4,
 450                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_CLK_CTRL, 4, 2, 0,
 451                         &canclk_lock);
 452         clk = clk_register_divider(NULL, "can_div0", "can_mux", 0,
 453                         SLCR_CAN_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 454                         CLK_DIVIDER_ALLOW_ZERO, &canclk_lock);
 455         clk = clk_register_divider(NULL, "can_div1", "can_div0",
 456                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 20, 6,
 457                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 458                         &canclk_lock);
 459         clk = clk_register_gate(NULL, "can0_gate", "can_div1",
 460                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 0, 0,
 461                         &canclk_lock);
 462         clk = clk_register_gate(NULL, "can1_gate", "can_div1",
 463                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 1, 0,
 464                         &canclk_lock);
 465         clk = clk_register_mux(NULL, "can0_mio_mux",
 466                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 467                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 0, 6, 0,
 468                         &canmioclk_lock);
 469         clk = clk_register_mux(NULL, "can1_mio_mux",
 470                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 471                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 16, 6,
 472                         0, &canmioclk_lock);
 473         clks[can0] = clk_register_mux(NULL, clk_output_name[can0],
 474                         can0_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 475                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 6, 1, 0,
 476                         &canmioclk_lock);
 477         clks[can1] = clk_register_mux(NULL, clk_output_name[can1],
 478                         can1_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 479                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 22, 1,
 480                         0, &canmioclk_lock);
 481
 482         for (i = 0; i < ARRAY_SIZE(dbgtrc_emio_input_names); i++) {
 483                 int idx = of_property_match_string(np, "clock-names",
 484                                 dbgtrc_emio_input_names[i]);
 485                 if (idx >= 0)
 486                         dbg_emio_mux_parents[i + 1] = of_clk_get_parent_name(np,
 487                                         idx);
 488         }
 489         clk = clk_register_mux(NULL, "dbg_mux", periph_parents, 4,
 490                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 4, 2, 0,
 491                         &dbgclk_lock);
 492         clk = clk_register_divider(NULL, "dbg_div", "dbg_mux", 0,
 493                         SLCR_DBG_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 494                         CLK_DIVIDER_ALLOW_ZERO, &dbgclk_lock);
 495         clk = clk_register_mux(NULL, "dbg_emio_mux", dbg_emio_mux_parents, 2,
 496                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 6, 1, 0,
 497                         &dbgclk_lock);
 498         clks[dbg_trc] = clk_register_gate(NULL, clk_output_name[dbg_trc],
 499                         "dbg_emio_mux", CLK_SET_RATE_PARENT, SLCR_DBG_CLK_CTRL,
 500                         0, 0, &dbgclk_lock);
 501         clks[dbg_apb] = clk_register_gate(NULL, clk_output_name[dbg_apb],
 502                         clk_output_name[cpu_1x], 0, SLCR_DBG_CLK_CTRL, 1, 0,
 503                         &dbgclk_lock);
 504
 505         /* leave debug clocks in the state the bootloader set them up to */
 506         tmp = clk_readl(SLCR_DBG_CLK_CTRL);
 507         if (tmp & DBG_CLK_CTRL_CLKACT_TRC)
 508                 if (clk_prepare_enable(clks[dbg_trc]))
 509                         pr_warn("%s: trace clk enable failed\n", __func__);
 510         if (tmp & DBG_CLK_CTRL_CPU_1XCLKACT)
 511                 if (clk_prepare_enable(clks[dbg_apb]))
 512                         pr_warn("%s: debug APB clk enable failed\n", __func__);
 513
 514         /* One gated clock for all APER clocks. */
 515         clks[dma] = clk_register_gate(NULL, clk_output_name[dma],
 516                         clk_output_name[cpu_2x], 0, SLCR_APER_CLK_CTRL, 0, 0,
 517                         &aperclk_lock);
 518         clks[usb0_aper] = clk_register_gate(NULL, clk_output_name[usb0_aper],
 519                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 2, 0,
 520                         &aperclk_lock);
 521         clks[usb1_aper] = clk_register_gate(NULL, clk_output_name[usb1_aper],
 522                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 3, 0,
 523                         &aperclk_lock);
 524         clks[gem0_aper] = clk_register_gate(NULL, clk_output_name[gem0_aper],
 525                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 6, 0,
 526                         &aperclk_lock);
 527         clks[gem1_aper] = clk_register_gate(NULL, clk_output_name[gem1_aper],
 528                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 7, 0,
 529                         &aperclk_lock);
 530         clks[sdio0_aper] = clk_register_gate(NULL, clk_output_name[sdio0_aper],
 531                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 10, 0,
 532                         &aperclk_lock);
 533         clks[sdio1_aper] = clk_register_gate(NULL, clk_output_name[sdio1_aper],
 534                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 11, 0,
 535                         &aperclk_lock);
 536         clks[spi0_aper] = clk_register_gate(NULL, clk_output_name[spi0_aper],
 537                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 14, 0,
 538                         &aperclk_lock);
 539         clks[spi1_aper] = clk_register_gate(NULL, clk_output_name[spi1_aper],
 540                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 15, 0,
 541                         &aperclk_lock);
 542         clks[can0_aper] = clk_register_gate(NULL, clk_output_name[can0_aper],
 543                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 16, 0,
 544                         &aperclk_lock);
 545         clks[can1_aper] = clk_register_gate(NULL, clk_output_name[can1_aper],
 546                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 17, 0,
 547                         &aperclk_lock);
 548         clks[i2c0_aper] = clk_register_gate(NULL, clk_output_name[i2c0_aper],
 549                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 18, 0,
 550                         &aperclk_lock);
 551         clks[i2c1_aper] = clk_register_gate(NULL, clk_output_name[i2c1_aper],
 552                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 19, 0,
 553                         &aperclk_lock);
 554         clks[uart0_aper] = clk_register_gate(NULL, clk_output_name[uart0_aper],
 555                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 20, 0,
 556                         &aperclk_lock);
 557         clks[uart1_aper] = clk_register_gate(NULL, clk_output_name[uart1_aper],
 558                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 21, 0,
 559                         &aperclk_lock);
 560         clks[gpio_aper] = clk_register_gate(NULL, clk_output_name[gpio_aper],
 561                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 22, 0,
 562                         &aperclk_lock);
 563         clks[lqspi_aper] = clk_register_gate(NULL, clk_output_name[lqspi_aper],
 564                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 23, 0,
 565                         &aperclk_lock);
 566         clks[smc_aper] = clk_register_gate(NULL, clk_output_name[smc_aper],
 567                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 24, 0,
 568                         &aperclk_lock);
 569
 570         for (i = 0; i < ARRAY_SIZE(clks); i++) {
 571                 if (IS_ERR(clks[i])) {
 572                         pr_err("Zynq clk %d: register failed with %ld\n",
 573                                i, PTR_ERR(clks[i]));
 574                         BUG();
 575                 }
 576         }
 577
 578         clk_data.clks = clks;
 579         clk_data.clk_num = ARRAY_SIZE(clks);
 580         of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 581 }
 582
 583 CLK_OF_DECLARE(zynq_clkc, "xlnx,ps7-clkc", zynq_clk_setup);
 584
 585 void __init zynq_clock_init(void)
 586 {
 587         struct device_node *np;
 588         struct device_node *slcr;
 589         struct resource res;
 590
 591         np = of_find_compatible_node(NULL, NULL, "xlnx,ps7-clkc");
 592         if (!np) {
 593                 pr_err("%s: clkc node not found\n", __func__);
 594                 goto np_err;
 595         }
 596
 597         if (of_address_to_resource(np, 0, &res)) {
 598                 pr_err("%s: failed to get resource\n", np->name);
 599                 goto np_err;
 600         }
 601
 602         slcr = of_get_parent(np);
 603
 604         if (slcr->data) {
 605                 zynq_clkc_base = (__force void __iomem *)slcr->data + res.start;
 606         } else {
 607                 pr_err("%s: Unable to get I/O memory\n", np->name);
 608                 of_node_put(slcr);
 609                 goto np_err;
 610         }
 611
 612         pr_info("%s: clkc starts at %p\n", __func__, zynq_clkc_base);
 613
 614         of_node_put(slcr);
 615         of_node_put(np);
 616
 617         return;
 618
 619 np_err:
 620         of_node_put(np);
 621         BUG();
 622 }