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 return; 623 } 624