kernel/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.h>
  23 #include <linux/clk-provider.h>
  24 #include <linux/of.h>
  25 #include <linux/of_address.h>
  26 #include <linux/slab.h>
  27 #include <linux/string.h>
  28 #include <linux/io.h>
  29
  30 static void __iomem *zynq_clkc_base;
  31
  32 #define SLCR_ARMPLL_CTRL                (zynq_clkc_base + 0x00)
  33 #define SLCR_DDRPLL_CTRL                (zynq_clkc_base + 0x04)
  34 #define SLCR_IOPLL_CTRL                 (zynq_clkc_base + 0x08)
  35 #define SLCR_PLL_STATUS                 (zynq_clkc_base + 0x0c)
  36 #define SLCR_ARM_CLK_CTRL               (zynq_clkc_base + 0x20)
  37 #define SLCR_DDR_CLK_CTRL               (zynq_clkc_base + 0x24)
  38 #define SLCR_DCI_CLK_CTRL               (zynq_clkc_base + 0x28)
  39 #define SLCR_APER_CLK_CTRL              (zynq_clkc_base + 0x2c)
  40 #define SLCR_GEM0_CLK_CTRL              (zynq_clkc_base + 0x40)
  41 #define SLCR_GEM1_CLK_CTRL              (zynq_clkc_base + 0x44)
  42 #define SLCR_SMC_CLK_CTRL               (zynq_clkc_base + 0x48)
  43 #define SLCR_LQSPI_CLK_CTRL             (zynq_clkc_base + 0x4c)
  44 #define SLCR_SDIO_CLK_CTRL              (zynq_clkc_base + 0x50)
  45 #define SLCR_UART_CLK_CTRL              (zynq_clkc_base + 0x54)
  46 #define SLCR_SPI_CLK_CTRL               (zynq_clkc_base + 0x58)
  47 #define SLCR_CAN_CLK_CTRL               (zynq_clkc_base + 0x5c)
  48 #define SLCR_CAN_MIOCLK_CTRL            (zynq_clkc_base + 0x60)
  49 #define SLCR_DBG_CLK_CTRL               (zynq_clkc_base + 0x64)
  50 #define SLCR_PCAP_CLK_CTRL              (zynq_clkc_base + 0x68)
  51 #define SLCR_FPGA0_CLK_CTRL             (zynq_clkc_base + 0x70)
  52 #define SLCR_621_TRUE                   (zynq_clkc_base + 0xc4)
  53 #define SLCR_SWDT_CLK_SEL               (zynq_clkc_base + 0x204)
  54
  55 #define NUM_MIO_PINS    54
  56
  57 #define DBG_CLK_CTRL_CLKACT_TRC         BIT(0)
  58 #define DBG_CLK_CTRL_CPU_1XCLKACT       BIT(1)
  59
  60 enum zynq_clk {
  61         armpll, ddrpll, iopll,
  62         cpu_6or4x, cpu_3or2x, cpu_2x, cpu_1x,
  63         ddr2x, ddr3x, dci,
  64         lqspi, smc, pcap, gem0, gem1, fclk0, fclk1, fclk2, fclk3, can0, can1,
  65         sdio0, sdio1, uart0, uart1, spi0, spi1, dma,
  66         usb0_aper, usb1_aper, gem0_aper, gem1_aper,
  67         sdio0_aper, sdio1_aper, spi0_aper, spi1_aper, can0_aper, can1_aper,
  68         i2c0_aper, i2c1_aper, uart0_aper, uart1_aper, gpio_aper, lqspi_aper,
  69         smc_aper, swdt, dbg_trc, dbg_apb, clk_max};
  70
  71 static struct clk *ps_clk;
  72 static struct clk *clks[clk_max];
  73 static struct clk_onecell_data clk_data;
  74
  75 static DEFINE_SPINLOCK(armpll_lock);
  76 static DEFINE_SPINLOCK(ddrpll_lock);
  77 static DEFINE_SPINLOCK(iopll_lock);
  78 static DEFINE_SPINLOCK(armclk_lock);
  79 static DEFINE_SPINLOCK(swdtclk_lock);
  80 static DEFINE_SPINLOCK(ddrclk_lock);
  81 static DEFINE_SPINLOCK(dciclk_lock);
  82 static DEFINE_SPINLOCK(gem0clk_lock);
  83 static DEFINE_SPINLOCK(gem1clk_lock);
  84 static DEFINE_SPINLOCK(canclk_lock);
  85 static DEFINE_SPINLOCK(canmioclk_lock);
  86 static DEFINE_SPINLOCK(dbgclk_lock);
  87 static DEFINE_SPINLOCK(aperclk_lock);
  88
  89 static const char *const armpll_parents[] __initconst = {"armpll_int",
  90         "ps_clk"};
  91 static const char *const ddrpll_parents[] __initconst = {"ddrpll_int",
  92         "ps_clk"};
  93 static const char *const iopll_parents[] __initconst = {"iopll_int",
  94         "ps_clk"};
  95 static const char *gem0_mux_parents[] __initdata = {"gem0_div1", "dummy_name"};
  96 static const char *gem1_mux_parents[] __initdata = {"gem1_div1", "dummy_name"};
  97 static const char *const can0_mio_mux2_parents[] __initconst = {"can0_gate",
  98         "can0_mio_mux"};
  99 static const char *const can1_mio_mux2_parents[] __initconst = {"can1_gate",
 100         "can1_mio_mux"};
 101 static const char *dbg_emio_mux_parents[] __initdata = {"dbg_div",
 102         "dummy_name"};
 103
 104 static const char *const dbgtrc_emio_input_names[] __initconst = {
 105         "trace_emio_clk"};
 106 static const char *const gem0_emio_input_names[] __initconst = {
 107         "gem0_emio_clk"};
 108 static const char *const gem1_emio_input_names[] __initconst = {
 109         "gem1_emio_clk"};
 110 static const char *const swdt_ext_clk_input_names[] __initconst = {
 111         "swdt_ext_clk"};
 112
 113 static void __init zynq_clk_register_fclk(enum zynq_clk fclk,
 114                 const char *clk_name, void __iomem *fclk_ctrl_reg,
 115                 const char **parents, int enable)
 116 {
 117         struct clk *clk;
 118         u32 enable_reg;
 119         char *mux_name;
 120         char *div0_name;
 121         char *div1_name;
 122         spinlock_t *fclk_lock;
 123         spinlock_t *fclk_gate_lock;
 124         void __iomem *fclk_gate_reg = fclk_ctrl_reg + 8;
 125
 126         fclk_lock = kmalloc(sizeof(*fclk_lock), GFP_KERNEL);
 127         if (!fclk_lock)
 128                 goto err;
 129         fclk_gate_lock = kmalloc(sizeof(*fclk_gate_lock), GFP_KERNEL);
 130         if (!fclk_gate_lock)
 131                 goto err_fclk_gate_lock;
 132         spin_lock_init(fclk_lock);
 133         spin_lock_init(fclk_gate_lock);
 134
 135         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name);
 136         if (!mux_name)
 137                 goto err_mux_name;
 138         div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name);
 139         if (!div0_name)
 140                 goto err_div0_name;
 141         div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name);
 142         if (!div1_name)
 143                 goto err_div1_name;
 144
 145         clk = clk_register_mux(NULL, mux_name, parents, 4,
 146                         CLK_SET_RATE_NO_REPARENT, fclk_ctrl_reg, 4, 2, 0,
 147                         fclk_lock);
 148
 149         clk = clk_register_divider(NULL, div0_name, mux_name,
 150                         0, fclk_ctrl_reg, 8, 6, CLK_DIVIDER_ONE_BASED |
 151                         CLK_DIVIDER_ALLOW_ZERO, fclk_lock);
 152
 153         clk = clk_register_divider(NULL, div1_name, div0_name,
 154                         CLK_SET_RATE_PARENT, fclk_ctrl_reg, 20, 6,
 155                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 156                         fclk_lock);
 157
 158         clks[fclk] = clk_register_gate(NULL, clk_name,
 159                         div1_name, CLK_SET_RATE_PARENT, fclk_gate_reg,
 160                         0, CLK_GATE_SET_TO_DISABLE, fclk_gate_lock);
 161         enable_reg = clk_readl(fclk_gate_reg) & 1;
 162         if (enable && !enable_reg) {
 163                 if (clk_prepare_enable(clks[fclk]))
 164                         pr_warn("%s: FCLK%u enable failed\n", __func__,
 165                                         fclk - fclk0);
 166         }
 167         kfree(mux_name);
 168         kfree(div0_name);
 169         kfree(div1_name);
 170
 171         return;
 172
 173 err_div1_name:
 174         kfree(div0_name);
 175 err_div0_name:
 176         kfree(mux_name);
 177 err_mux_name:
 178         kfree(fclk_gate_lock);
 179 err_fclk_gate_lock:
 180         kfree(fclk_lock);
 181 err:
 182         clks[fclk] = ERR_PTR(-ENOMEM);
 183 }
 184
 185 static void __init zynq_clk_register_periph_clk(enum zynq_clk clk0,
 186                 enum zynq_clk clk1, const char *clk_name0,
 187                 const char *clk_name1, void __iomem *clk_ctrl,
 188                 const char **parents, unsigned int two_gates)
 189 {
 190         struct clk *clk;
 191         char *mux_name;
 192         char *div_name;
 193         spinlock_t *lock;
 194
 195         lock = kmalloc(sizeof(*lock), GFP_KERNEL);
 196         if (!lock)
 197                 goto err;
 198         spin_lock_init(lock);
 199
 200         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name0);
 201         div_name = kasprintf(GFP_KERNEL, "%s_div", clk_name0);
 202
 203         clk = clk_register_mux(NULL, mux_name, parents, 4,
 204                         CLK_SET_RATE_NO_REPARENT, clk_ctrl, 4, 2, 0, lock);
 205
 206         clk = clk_register_divider(NULL, div_name, mux_name, 0, clk_ctrl, 8, 6,
 207                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, lock);
 208
 209         clks[clk0] = clk_register_gate(NULL, clk_name0, div_name,
 210                         CLK_SET_RATE_PARENT, clk_ctrl, 0, 0, lock);
 211         if (two_gates)
 212                 clks[clk1] = clk_register_gate(NULL, clk_name1, div_name,
 213                                 CLK_SET_RATE_PARENT, clk_ctrl, 1, 0, lock);
 214
 215         kfree(mux_name);
 216         kfree(div_name);
 217
 218         return;
 219
 220 err:
 221         clks[clk0] = ERR_PTR(-ENOMEM);
 222         if (two_gates)
 223                 clks[clk1] = ERR_PTR(-ENOMEM);
 224 }
 225
 226 static void __init zynq_clk_setup(struct device_node *np)
 227 {
 228         int i;
 229         u32 tmp;
 230         int ret;
 231         struct clk *clk;
 232         char *clk_name;
 233         unsigned int fclk_enable = 0;
 234         const char *clk_output_name[clk_max];
 235         const char *cpu_parents[4];
 236         const char *periph_parents[4];
 237         const char *swdt_ext_clk_mux_parents[2];
 238         const char *can_mio_mux_parents[NUM_MIO_PINS];
 239         const char *dummy_nm = "dummy_name";
 240
 241         pr_info("Zynq clock init\n");
 242
 243         /* get clock output names from DT */
 244         for (i = 0; i < clk_max; i++) {
 245                 if (of_property_read_string_index(np, "clock-output-names",
 246                                   i, &clk_output_name[i])) {
 247                         pr_err("%s: clock output name not in DT\n", __func__);
 248                         BUG();
 249                 }
 250         }
 251         cpu_parents[0] = clk_output_name[armpll];
 252         cpu_parents[1] = clk_output_name[armpll];
 253         cpu_parents[2] = clk_output_name[ddrpll];
 254         cpu_parents[3] = clk_output_name[iopll];
 255         periph_parents[0] = clk_output_name[iopll];
 256         periph_parents[1] = clk_output_name[iopll];
 257         periph_parents[2] = clk_output_name[armpll];
 258         periph_parents[3] = clk_output_name[ddrpll];
 259
 260         of_property_read_u32(np, "fclk-enable", &fclk_enable);
 261
 262         /* ps_clk */
 263         ret = of_property_read_u32(np, "ps-clk-frequency", &tmp);
 264         if (ret) {
 265                 pr_warn("ps_clk frequency not specified, using 33 MHz.\n");
 266                 tmp = 33333333;
 267         }
 268         ps_clk = clk_register_fixed_rate(NULL, "ps_clk", NULL, CLK_IS_ROOT,
 269                         tmp);
 270
 271         /* PLLs */
 272         clk = clk_register_zynq_pll("armpll_int", "ps_clk", SLCR_ARMPLL_CTRL,
 273                         SLCR_PLL_STATUS, 0, &armpll_lock);
 274         clks[armpll] = clk_register_mux(NULL, clk_output_name[armpll],
 275                         armpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 276                         SLCR_ARMPLL_CTRL, 4, 1, 0, &armpll_lock);
 277
 278         clk = clk_register_zynq_pll("ddrpll_int", "ps_clk", SLCR_DDRPLL_CTRL,
 279                         SLCR_PLL_STATUS, 1, &ddrpll_lock);
 280         clks[ddrpll] = clk_register_mux(NULL, clk_output_name[ddrpll],
 281                         ddrpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 282                         SLCR_DDRPLL_CTRL, 4, 1, 0, &ddrpll_lock);
 283
 284         clk = clk_register_zynq_pll("iopll_int", "ps_clk", SLCR_IOPLL_CTRL,
 285                         SLCR_PLL_STATUS, 2, &iopll_lock);
 286         clks[iopll] = clk_register_mux(NULL, clk_output_name[iopll],
 287                         iopll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 288                         SLCR_IOPLL_CTRL, 4, 1, 0, &iopll_lock);
 289
 290         /* CPU clocks */
 291         tmp = clk_readl(SLCR_621_TRUE) & 1;
 292         clk = clk_register_mux(NULL, "cpu_mux", cpu_parents, 4,
 293                         CLK_SET_RATE_NO_REPARENT, SLCR_ARM_CLK_CTRL, 4, 2, 0,
 294                         &armclk_lock);
 295         clk = clk_register_divider(NULL, "cpu_div", "cpu_mux", 0,
 296                         SLCR_ARM_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 297                         CLK_DIVIDER_ALLOW_ZERO, &armclk_lock);
 298
 299         clks[cpu_6or4x] = clk_register_gate(NULL, clk_output_name[cpu_6or4x],
 300                         "cpu_div", CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
 301                         SLCR_ARM_CLK_CTRL, 24, 0, &armclk_lock);
 302
 303         clk = clk_register_fixed_factor(NULL, "cpu_3or2x_div", "cpu_div", 0,
 304                         1, 2);
 305         clks[cpu_3or2x] = clk_register_gate(NULL, clk_output_name[cpu_3or2x],
 306                         "cpu_3or2x_div", CLK_IGNORE_UNUSED,
 307                         SLCR_ARM_CLK_CTRL, 25, 0, &armclk_lock);
 308
 309         clk = clk_register_fixed_factor(NULL, "cpu_2x_div", "cpu_div", 0, 1,
 310                         2 + tmp);
 311         clks[cpu_2x] = clk_register_gate(NULL, clk_output_name[cpu_2x],
 312                         "cpu_2x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL,
 313                         26, 0, &armclk_lock);
 314         clk_prepare_enable(clks[cpu_2x]);
 315
 316         clk = clk_register_fixed_factor(NULL, "cpu_1x_div", "cpu_div", 0, 1,
 317                         4 + 2 * tmp);
 318         clks[cpu_1x] = clk_register_gate(NULL, clk_output_name[cpu_1x],
 319                         "cpu_1x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL, 27,
 320                         0, &armclk_lock);
 321
 322         /* Timers */
 323         swdt_ext_clk_mux_parents[0] = clk_output_name[cpu_1x];
 324         for (i = 0; i < ARRAY_SIZE(swdt_ext_clk_input_names); i++) {
 325                 int idx = of_property_match_string(np, "clock-names",
 326                                 swdt_ext_clk_input_names[i]);
 327                 if (idx >= 0)
 328                         swdt_ext_clk_mux_parents[i + 1] =
 329                                 of_clk_get_parent_name(np, idx);
 330                 else
 331                         swdt_ext_clk_mux_parents[i + 1] = dummy_nm;
 332         }
 333         clks[swdt] = clk_register_mux(NULL, clk_output_name[swdt],
 334                         swdt_ext_clk_mux_parents, 2, CLK_SET_RATE_PARENT |
 335                         CLK_SET_RATE_NO_REPARENT, SLCR_SWDT_CLK_SEL, 0, 1, 0,
 336                         &swdtclk_lock);
 337
 338         /* DDR clocks */
 339         clk = clk_register_divider(NULL, "ddr2x_div", "ddrpll", 0,
 340                         SLCR_DDR_CLK_CTRL, 26, 6, CLK_DIVIDER_ONE_BASED |
 341                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 342         clks[ddr2x] = clk_register_gate(NULL, clk_output_name[ddr2x],
 343                         "ddr2x_div", 0, SLCR_DDR_CLK_CTRL, 1, 0, &ddrclk_lock);
 344         clk_prepare_enable(clks[ddr2x]);
 345         clk = clk_register_divider(NULL, "ddr3x_div", "ddrpll", 0,
 346                         SLCR_DDR_CLK_CTRL, 20, 6, CLK_DIVIDER_ONE_BASED |
 347                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 348         clks[ddr3x] = clk_register_gate(NULL, clk_output_name[ddr3x],
 349                         "ddr3x_div", 0, SLCR_DDR_CLK_CTRL, 0, 0, &ddrclk_lock);
 350         clk_prepare_enable(clks[ddr3x]);
 351
 352         clk = clk_register_divider(NULL, "dci_div0", "ddrpll", 0,
 353                         SLCR_DCI_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 354                         CLK_DIVIDER_ALLOW_ZERO, &dciclk_lock);
 355         clk = clk_register_divider(NULL, "dci_div1", "dci_div0",
 356                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 20, 6,
 357                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 358                         &dciclk_lock);
 359         clks[dci] = clk_register_gate(NULL, clk_output_name[dci], "dci_div1",
 360                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 0, 0,
 361                         &dciclk_lock);
 362         clk_prepare_enable(clks[dci]);
 363
 364         /* Peripheral clocks */
 365         for (i = fclk0; i <= fclk3; i++) {
 366                 int enable = !!(fclk_enable & BIT(i - fclk0));
 367                 zynq_clk_register_fclk(i, clk_output_name[i],
 368                                 SLCR_FPGA0_CLK_CTRL + 0x10 * (i - fclk0),
 369                                 periph_parents, enable);
 370         }
 371
 372         zynq_clk_register_periph_clk(lqspi, 0, clk_output_name[lqspi], NULL,
 373                         SLCR_LQSPI_CLK_CTRL, periph_parents, 0);
 374
 375         zynq_clk_register_periph_clk(smc, 0, clk_output_name[smc], NULL,
 376                         SLCR_SMC_CLK_CTRL, periph_parents, 0);
 377
 378         zynq_clk_register_periph_clk(pcap, 0, clk_output_name[pcap], NULL,
 379                         SLCR_PCAP_CLK_CTRL, periph_parents, 0);
 380
 381         zynq_clk_register_periph_clk(sdio0, sdio1, clk_output_name[sdio0],
 382                         clk_output_name[sdio1], SLCR_SDIO_CLK_CTRL,
 383                         periph_parents, 1);
 384
 385         zynq_clk_register_periph_clk(uart0, uart1, clk_output_name[uart0],
 386                         clk_output_name[uart1], SLCR_UART_CLK_CTRL,
 387                         periph_parents, 1);
 388
 389         zynq_clk_register_periph_clk(spi0, spi1, clk_output_name[spi0],
 390                         clk_output_name[spi1], SLCR_SPI_CLK_CTRL,
 391                         periph_parents, 1);
 392
 393         for (i = 0; i < ARRAY_SIZE(gem0_emio_input_names); i++) {
 394                 int idx = of_property_match_string(np, "clock-names",
 395                                 gem0_emio_input_names[i]);
 396                 if (idx >= 0)
 397                         gem0_mux_parents[i + 1] = of_clk_get_parent_name(np,
 398                                         idx);
 399         }
 400         clk = clk_register_mux(NULL, "gem0_mux", periph_parents, 4,
 401                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM0_CLK_CTRL, 4, 2, 0,
 402                         &gem0clk_lock);
 403         clk = clk_register_divider(NULL, "gem0_div0", "gem0_mux", 0,
 404                         SLCR_GEM0_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 405                         CLK_DIVIDER_ALLOW_ZERO, &gem0clk_lock);
 406         clk = clk_register_divider(NULL, "gem0_div1", "gem0_div0",
 407                         CLK_SET_RATE_PARENT, SLCR_GEM0_CLK_CTRL, 20, 6,
 408                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 409                         &gem0clk_lock);
 410         clk = clk_register_mux(NULL, "gem0_emio_mux", gem0_mux_parents, 2,
 411                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 412                         SLCR_GEM0_CLK_CTRL, 6, 1, 0,
 413                         &gem0clk_lock);
 414         clks[gem0] = clk_register_gate(NULL, clk_output_name[gem0],
 415                         "gem0_emio_mux", CLK_SET_RATE_PARENT,
 416                         SLCR_GEM0_CLK_CTRL, 0, 0, &gem0clk_lock);
 417
 418         for (i = 0; i < ARRAY_SIZE(gem1_emio_input_names); i++) {
 419                 int idx = of_property_match_string(np, "clock-names",
 420                                 gem1_emio_input_names[i]);
 421                 if (idx >= 0)
 422                         gem1_mux_parents[i + 1] = of_clk_get_parent_name(np,
 423                                         idx);
 424         }
 425         clk = clk_register_mux(NULL, "gem1_mux", periph_parents, 4,
 426                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM1_CLK_CTRL, 4, 2, 0,
 427                         &gem1clk_lock);
 428         clk = clk_register_divider(NULL, "gem1_div0", "gem1_mux", 0,
 429                         SLCR_GEM1_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 430                         CLK_DIVIDER_ALLOW_ZERO, &gem1clk_lock);
 431         clk = clk_register_divider(NULL, "gem1_div1", "gem1_div0",
 432                         CLK_SET_RATE_PARENT, SLCR_GEM1_CLK_CTRL, 20, 6,
 433                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 434                         &gem1clk_lock);
 435         clk = clk_register_mux(NULL, "gem1_emio_mux", gem1_mux_parents, 2,
 436                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 437                         SLCR_GEM1_CLK_CTRL, 6, 1, 0,
 438                         &gem1clk_lock);
 439         clks[gem1] = clk_register_gate(NULL, clk_output_name[gem1],
 440                         "gem1_emio_mux", CLK_SET_RATE_PARENT,
 441                         SLCR_GEM1_CLK_CTRL, 0, 0, &gem1clk_lock);
 442
 443         tmp = strlen("mio_clk_00x");
 444         clk_name = kmalloc(tmp, GFP_KERNEL);
 445         for (i = 0; i < NUM_MIO_PINS; i++) {
 446                 int idx;
 447
 448                 snprintf(clk_name, tmp, "mio_clk_%2.2d", i);
 449                 idx = of_property_match_string(np, "clock-names", clk_name);
 450                 if (idx >= 0)
 451                         can_mio_mux_parents[i] = of_clk_get_parent_name(np,
 452                                                 idx);
 453                 else
 454                         can_mio_mux_parents[i] = dummy_nm;
 455         }
 456         kfree(clk_name);
 457         clk = clk_register_mux(NULL, "can_mux", periph_parents, 4,
 458                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_CLK_CTRL, 4, 2, 0,
 459                         &canclk_lock);
 460         clk = clk_register_divider(NULL, "can_div0", "can_mux", 0,
 461                         SLCR_CAN_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 462                         CLK_DIVIDER_ALLOW_ZERO, &canclk_lock);
 463         clk = clk_register_divider(NULL, "can_div1", "can_div0",
 464                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 20, 6,
 465                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 466                         &canclk_lock);
 467         clk = clk_register_gate(NULL, "can0_gate", "can_div1",
 468                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 0, 0,
 469                         &canclk_lock);
 470         clk = clk_register_gate(NULL, "can1_gate", "can_div1",
 471                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 1, 0,
 472                         &canclk_lock);
 473         clk = clk_register_mux(NULL, "can0_mio_mux",
 474                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 475                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 0, 6, 0,
 476                         &canmioclk_lock);
 477         clk = clk_register_mux(NULL, "can1_mio_mux",
 478                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 479                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 16, 6,
 480                         0, &canmioclk_lock);
 481         clks[can0] = clk_register_mux(NULL, clk_output_name[can0],
 482                         can0_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 483                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 6, 1, 0,
 484                         &canmioclk_lock);
 485         clks[can1] = clk_register_mux(NULL, clk_output_name[can1],
 486                         can1_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 487                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 22, 1,
 488                         0, &canmioclk_lock);
 489
 490         for (i = 0; i < ARRAY_SIZE(dbgtrc_emio_input_names); i++) {
 491                 int idx = of_property_match_string(np, "clock-names",
 492                                 dbgtrc_emio_input_names[i]);
 493                 if (idx >= 0)
 494                         dbg_emio_mux_parents[i + 1] = of_clk_get_parent_name(np,
 495                                         idx);
 496         }
 497         clk = clk_register_mux(NULL, "dbg_mux", periph_parents, 4,
 498                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 4, 2, 0,
 499                         &dbgclk_lock);
 500         clk = clk_register_divider(NULL, "dbg_div", "dbg_mux", 0,
 501                         SLCR_DBG_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 502                         CLK_DIVIDER_ALLOW_ZERO, &dbgclk_lock);
 503         clk = clk_register_mux(NULL, "dbg_emio_mux", dbg_emio_mux_parents, 2,
 504                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 6, 1, 0,
 505                         &dbgclk_lock);
 506         clks[dbg_trc] = clk_register_gate(NULL, clk_output_name[dbg_trc],
 507                         "dbg_emio_mux", CLK_SET_RATE_PARENT, SLCR_DBG_CLK_CTRL,
 508                         0, 0, &dbgclk_lock);
 509         clks[dbg_apb] = clk_register_gate(NULL, clk_output_name[dbg_apb],
 510                         clk_output_name[cpu_1x], 0, SLCR_DBG_CLK_CTRL, 1, 0,
 511                         &dbgclk_lock);
 512
 513         /* leave debug clocks in the state the bootloader set them up to */
 514         tmp = clk_readl(SLCR_DBG_CLK_CTRL);
 515         if (tmp & DBG_CLK_CTRL_CLKACT_TRC)
 516                 if (clk_prepare_enable(clks[dbg_trc]))
 517                         pr_warn("%s: trace clk enable failed\n", __func__);
 518         if (tmp & DBG_CLK_CTRL_CPU_1XCLKACT)
 519                 if (clk_prepare_enable(clks[dbg_apb]))
 520                         pr_warn("%s: debug APB clk enable failed\n", __func__);
 521
 522         /* One gated clock for all APER clocks. */
 523         clks[dma] = clk_register_gate(NULL, clk_output_name[dma],
 524                         clk_output_name[cpu_2x], 0, SLCR_APER_CLK_CTRL, 0, 0,
 525                         &aperclk_lock);
 526         clks[usb0_aper] = clk_register_gate(NULL, clk_output_name[usb0_aper],
 527                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 2, 0,
 528                         &aperclk_lock);
 529         clks[usb1_aper] = clk_register_gate(NULL, clk_output_name[usb1_aper],
 530                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 3, 0,
 531                         &aperclk_lock);
 532         clks[gem0_aper] = clk_register_gate(NULL, clk_output_name[gem0_aper],
 533                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 6, 0,
 534                         &aperclk_lock);
 535         clks[gem1_aper] = clk_register_gate(NULL, clk_output_name[gem1_aper],
 536                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 7, 0,
 537                         &aperclk_lock);
 538         clks[sdio0_aper] = clk_register_gate(NULL, clk_output_name[sdio0_aper],
 539                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 10, 0,
 540                         &aperclk_lock);
 541         clks[sdio1_aper] = clk_register_gate(NULL, clk_output_name[sdio1_aper],
 542                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 11, 0,
 543                         &aperclk_lock);
 544         clks[spi0_aper] = clk_register_gate(NULL, clk_output_name[spi0_aper],
 545                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 14, 0,
 546                         &aperclk_lock);
 547         clks[spi1_aper] = clk_register_gate(NULL, clk_output_name[spi1_aper],
 548                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 15, 0,
 549                         &aperclk_lock);
 550         clks[can0_aper] = clk_register_gate(NULL, clk_output_name[can0_aper],
 551                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 16, 0,
 552                         &aperclk_lock);
 553         clks[can1_aper] = clk_register_gate(NULL, clk_output_name[can1_aper],
 554                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 17, 0,
 555                         &aperclk_lock);
 556         clks[i2c0_aper] = clk_register_gate(NULL, clk_output_name[i2c0_aper],
 557                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 18, 0,
 558                         &aperclk_lock);
 559         clks[i2c1_aper] = clk_register_gate(NULL, clk_output_name[i2c1_aper],
 560                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 19, 0,
 561                         &aperclk_lock);
 562         clks[uart0_aper] = clk_register_gate(NULL, clk_output_name[uart0_aper],
 563                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 20, 0,
 564                         &aperclk_lock);
 565         clks[uart1_aper] = clk_register_gate(NULL, clk_output_name[uart1_aper],
 566                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 21, 0,
 567                         &aperclk_lock);
 568         clks[gpio_aper] = clk_register_gate(NULL, clk_output_name[gpio_aper],
 569                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 22, 0,
 570                         &aperclk_lock);
 571         clks[lqspi_aper] = clk_register_gate(NULL, clk_output_name[lqspi_aper],
 572                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 23, 0,
 573                         &aperclk_lock);
 574         clks[smc_aper] = clk_register_gate(NULL, clk_output_name[smc_aper],
 575                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 24, 0,
 576                         &aperclk_lock);
 577
 578         for (i = 0; i < ARRAY_SIZE(clks); i++) {
 579                 if (IS_ERR(clks[i])) {
 580                         pr_err("Zynq clk %d: register failed with %ld\n",
 581                                i, PTR_ERR(clks[i]));
 582                         BUG();
 583                 }
 584         }
 585
 586         clk_data.clks = clks;
 587         clk_data.clk_num = ARRAY_SIZE(clks);
 588         of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 589 }
 590
 591 CLK_OF_DECLARE(zynq_clkc, "xlnx,ps7-clkc", zynq_clk_setup);
 592
 593 void __init zynq_clock_init(void)
 594 {
 595         struct device_node *np;
 596         struct device_node *slcr;
 597         struct resource res;
 598
 599         np = of_find_compatible_node(NULL, NULL, "xlnx,ps7-clkc");
 600         if (!np) {
 601                 pr_err("%s: clkc node not found\n", __func__);
 602                 goto np_err;
 603         }
 604
 605         if (of_address_to_resource(np, 0, &res)) {
 606                 pr_err("%s: failed to get resource\n", np->name);
 607                 goto np_err;
 608         }
 609
 610         slcr = of_get_parent(np);
 611
 612         if (slcr->data) {
 613                 zynq_clkc_base = (__force void __iomem *)slcr->data + res.start;
 614         } else {
 615                 pr_err("%s: Unable to get I/O memory\n", np->name);
 616                 of_node_put(slcr);
 617                 goto np_err;
 618         }
 619
 620         pr_info("%s: clkc starts at %p\n", __func__, zynq_clkc_base);
 621
 622         of_node_put(slcr);
 623         of_node_put(np);
 624
 625         return;
 626
 627 np_err:
 628         of_node_put(np);
 629         BUG();
 630 }