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