1 // SPDX-License-Identifier: GPL-2.0-or-later 2 // Copyright IBM Corp 3 // Copyright ASPEED Technology 4 5 #define pr_fmt(fmt) "clk-ast2600: " fmt 6 7 #include <linux/mfd/syscon.h> 8 #include <linux/of_address.h> 9 #include <linux/of_device.h> 10 #include <linux/platform_device.h> 11 #include <linux/regmap.h> 12 #include <linux/slab.h> 13 14 #include <dt-bindings/clock/ast2600-clock.h> 15 16 #include "clk-aspeed.h" 17 18 #define ASPEED_G6_NUM_CLKS 71 19 20 #define ASPEED_G6_SILICON_REV 0x004 21 22 #define ASPEED_G6_RESET_CTRL 0x040 23 #define ASPEED_G6_RESET_CTRL2 0x050 24 25 #define ASPEED_G6_CLK_STOP_CTRL 0x080 26 #define ASPEED_G6_CLK_STOP_CTRL2 0x090 27 28 #define ASPEED_G6_MISC_CTRL 0x0C0 29 #define UART_DIV13_EN BIT(12) 30 31 #define ASPEED_G6_CLK_SELECTION1 0x300 32 #define ASPEED_G6_CLK_SELECTION2 0x304 33 #define ASPEED_G6_CLK_SELECTION4 0x310 34 35 #define ASPEED_HPLL_PARAM 0x200 36 #define ASPEED_APLL_PARAM 0x210 37 #define ASPEED_MPLL_PARAM 0x220 38 #define ASPEED_EPLL_PARAM 0x240 39 #define ASPEED_DPLL_PARAM 0x260 40 41 #define ASPEED_G6_STRAP1 0x500 42 43 #define ASPEED_MAC12_CLK_DLY 0x340 44 #define ASPEED_MAC34_CLK_DLY 0x350 45 46 /* Globally visible clocks */ 47 static DEFINE_SPINLOCK(aspeed_g6_clk_lock); 48 49 /* Keeps track of all clocks */ 50 static struct clk_hw_onecell_data *aspeed_g6_clk_data; 51 52 static void __iomem *scu_g6_base; 53 54 /* 55 * Clocks marked with CLK_IS_CRITICAL: 56 * 57 * ref0 and ref1 are essential for the SoC to operate 58 * mpll is required if SDRAM is used 59 */ 60 static const struct aspeed_gate_data aspeed_g6_gates[] = { 61 /* clk rst name parent flags */ 62 [ASPEED_CLK_GATE_MCLK] = { 0, -1, "mclk-gate", "mpll", CLK_IS_CRITICAL }, /* SDRAM */ 63 [ASPEED_CLK_GATE_ECLK] = { 1, -1, "eclk-gate", "eclk", 0 }, /* Video Engine */ 64 [ASPEED_CLK_GATE_GCLK] = { 2, 7, "gclk-gate", NULL, 0 }, /* 2D engine */ 65 /* vclk parent - dclk/d1clk/hclk/mclk */ 66 [ASPEED_CLK_GATE_VCLK] = { 3, 6, "vclk-gate", NULL, 0 }, /* Video Capture */ 67 [ASPEED_CLK_GATE_BCLK] = { 4, 8, "bclk-gate", "bclk", 0 }, /* PCIe/PCI */ 68 /* From dpll */ 69 [ASPEED_CLK_GATE_DCLK] = { 5, -1, "dclk-gate", NULL, CLK_IS_CRITICAL }, /* DAC */ 70 [ASPEED_CLK_GATE_REF0CLK] = { 6, -1, "ref0clk-gate", "clkin", CLK_IS_CRITICAL }, 71 [ASPEED_CLK_GATE_USBPORT2CLK] = { 7, 3, "usb-port2-gate", NULL, 0 }, /* USB2.0 Host port 2 */ 72 /* Reserved 8 */ 73 [ASPEED_CLK_GATE_USBUHCICLK] = { 9, 15, "usb-uhci-gate", NULL, 0 }, /* USB1.1 (requires port 2 enabled) */ 74 /* From dpll/epll/40mhz usb p1 phy/gpioc6/dp phy pll */ 75 [ASPEED_CLK_GATE_D1CLK] = { 10, 13, "d1clk-gate", "d1clk", 0 }, /* GFX CRT */ 76 /* Reserved 11/12 */ 77 [ASPEED_CLK_GATE_YCLK] = { 13, 4, "yclk-gate", NULL, 0 }, /* HAC */ 78 [ASPEED_CLK_GATE_USBPORT1CLK] = { 14, 14, "usb-port1-gate", NULL, 0 }, /* USB2 hub/USB2 host port 1/USB1.1 dev */ 79 [ASPEED_CLK_GATE_UART5CLK] = { 15, -1, "uart5clk-gate", "uart", 0 }, /* UART5 */ 80 /* Reserved 16/19 */ 81 [ASPEED_CLK_GATE_MAC1CLK] = { 20, 11, "mac1clk-gate", "mac12", 0 }, /* MAC1 */ 82 [ASPEED_CLK_GATE_MAC2CLK] = { 21, 12, "mac2clk-gate", "mac12", 0 }, /* MAC2 */ 83 /* Reserved 22/23 */ 84 [ASPEED_CLK_GATE_RSACLK] = { 24, 4, "rsaclk-gate", NULL, 0 }, /* HAC */ 85 [ASPEED_CLK_GATE_RVASCLK] = { 25, 9, "rvasclk-gate", NULL, 0 }, /* RVAS */ 86 /* Reserved 26 */ 87 [ASPEED_CLK_GATE_EMMCCLK] = { 27, 16, "emmcclk-gate", NULL, 0 }, /* For card clk */ 88 /* Reserved 28/29/30 */ 89 [ASPEED_CLK_GATE_LCLK] = { 32, 32, "lclk-gate", NULL, 0 }, /* LPC */ 90 [ASPEED_CLK_GATE_ESPICLK] = { 33, -1, "espiclk-gate", NULL, 0 }, /* eSPI */ 91 [ASPEED_CLK_GATE_REF1CLK] = { 34, -1, "ref1clk-gate", "clkin", CLK_IS_CRITICAL }, 92 /* Reserved 35 */ 93 [ASPEED_CLK_GATE_SDCLK] = { 36, 56, "sdclk-gate", NULL, 0 }, /* SDIO/SD */ 94 [ASPEED_CLK_GATE_LHCCLK] = { 37, -1, "lhclk-gate", "lhclk", 0 }, /* LPC master/LPC+ */ 95 /* Reserved 38 RSA: no longer used */ 96 /* Reserved 39 */ 97 [ASPEED_CLK_GATE_I3C0CLK] = { 40, 40, "i3c0clk-gate", NULL, 0 }, /* I3C0 */ 98 [ASPEED_CLK_GATE_I3C1CLK] = { 41, 41, "i3c1clk-gate", NULL, 0 }, /* I3C1 */ 99 [ASPEED_CLK_GATE_I3C2CLK] = { 42, 42, "i3c2clk-gate", NULL, 0 }, /* I3C2 */ 100 [ASPEED_CLK_GATE_I3C3CLK] = { 43, 43, "i3c3clk-gate", NULL, 0 }, /* I3C3 */ 101 [ASPEED_CLK_GATE_I3C4CLK] = { 44, 44, "i3c4clk-gate", NULL, 0 }, /* I3C4 */ 102 [ASPEED_CLK_GATE_I3C5CLK] = { 45, 45, "i3c5clk-gate", NULL, 0 }, /* I3C5 */ 103 [ASPEED_CLK_GATE_I3C6CLK] = { 46, 46, "i3c6clk-gate", NULL, 0 }, /* I3C6 */ 104 [ASPEED_CLK_GATE_I3C7CLK] = { 47, 47, "i3c7clk-gate", NULL, 0 }, /* I3C7 */ 105 [ASPEED_CLK_GATE_UART1CLK] = { 48, -1, "uart1clk-gate", "uart", 0 }, /* UART1 */ 106 [ASPEED_CLK_GATE_UART2CLK] = { 49, -1, "uart2clk-gate", "uart", 0 }, /* UART2 */ 107 [ASPEED_CLK_GATE_UART3CLK] = { 50, -1, "uart3clk-gate", "uart", 0 }, /* UART3 */ 108 [ASPEED_CLK_GATE_UART4CLK] = { 51, -1, "uart4clk-gate", "uart", 0 }, /* UART4 */ 109 [ASPEED_CLK_GATE_MAC3CLK] = { 52, 52, "mac3clk-gate", "mac34", 0 }, /* MAC3 */ 110 [ASPEED_CLK_GATE_MAC4CLK] = { 53, 53, "mac4clk-gate", "mac34", 0 }, /* MAC4 */ 111 [ASPEED_CLK_GATE_UART6CLK] = { 54, -1, "uart6clk-gate", "uartx", 0 }, /* UART6 */ 112 [ASPEED_CLK_GATE_UART7CLK] = { 55, -1, "uart7clk-gate", "uartx", 0 }, /* UART7 */ 113 [ASPEED_CLK_GATE_UART8CLK] = { 56, -1, "uart8clk-gate", "uartx", 0 }, /* UART8 */ 114 [ASPEED_CLK_GATE_UART9CLK] = { 57, -1, "uart9clk-gate", "uartx", 0 }, /* UART9 */ 115 [ASPEED_CLK_GATE_UART10CLK] = { 58, -1, "uart10clk-gate", "uartx", 0 }, /* UART10 */ 116 [ASPEED_CLK_GATE_UART11CLK] = { 59, -1, "uart11clk-gate", "uartx", 0 }, /* UART11 */ 117 [ASPEED_CLK_GATE_UART12CLK] = { 60, -1, "uart12clk-gate", "uartx", 0 }, /* UART12 */ 118 [ASPEED_CLK_GATE_UART13CLK] = { 61, -1, "uart13clk-gate", "uartx", 0 }, /* UART13 */ 119 [ASPEED_CLK_GATE_FSICLK] = { 62, 59, "fsiclk-gate", NULL, 0 }, /* FSI */ 120 }; 121 122 static const struct clk_div_table ast2600_eclk_div_table[] = { 123 { 0x0, 2 }, 124 { 0x1, 2 }, 125 { 0x2, 3 }, 126 { 0x3, 4 }, 127 { 0x4, 5 }, 128 { 0x5, 6 }, 129 { 0x6, 7 }, 130 { 0x7, 8 }, 131 { 0 } 132 }; 133 134 static const struct clk_div_table ast2600_mac_div_table[] = { 135 { 0x0, 4 }, 136 { 0x1, 4 }, 137 { 0x2, 6 }, 138 { 0x3, 8 }, 139 { 0x4, 10 }, 140 { 0x5, 12 }, 141 { 0x6, 14 }, 142 { 0x7, 16 }, 143 { 0 } 144 }; 145 146 static const struct clk_div_table ast2600_div_table[] = { 147 { 0x0, 4 }, 148 { 0x1, 8 }, 149 { 0x2, 12 }, 150 { 0x3, 16 }, 151 { 0x4, 20 }, 152 { 0x5, 24 }, 153 { 0x6, 28 }, 154 { 0x7, 32 }, 155 { 0 } 156 }; 157 158 /* For hpll/dpll/epll/mpll */ 159 static struct clk_hw *ast2600_calc_pll(const char *name, u32 val) 160 { 161 unsigned int mult, div; 162 163 if (val & BIT(24)) { 164 /* Pass through mode */ 165 mult = div = 1; 166 } else { 167 /* F = 25Mhz * [(M + 2) / (n + 1)] / (p + 1) */ 168 u32 m = val & 0x1fff; 169 u32 n = (val >> 13) & 0x3f; 170 u32 p = (val >> 19) & 0xf; 171 mult = (m + 1) / (n + 1); 172 div = (p + 1); 173 } 174 return clk_hw_register_fixed_factor(NULL, name, "clkin", 0, 175 mult, div); 176 }; 177 178 static struct clk_hw *ast2600_calc_apll(const char *name, u32 val) 179 { 180 unsigned int mult, div; 181 182 if (val & BIT(20)) { 183 /* Pass through mode */ 184 mult = div = 1; 185 } else { 186 /* F = 25Mhz * (2-od) * [(m + 2) / (n + 1)] */ 187 u32 m = (val >> 5) & 0x3f; 188 u32 od = (val >> 4) & 0x1; 189 u32 n = val & 0xf; 190 191 mult = (2 - od) * (m + 2); 192 div = n + 1; 193 } 194 return clk_hw_register_fixed_factor(NULL, name, "clkin", 0, 195 mult, div); 196 }; 197 198 static u32 get_bit(u8 idx) 199 { 200 return BIT(idx % 32); 201 } 202 203 static u32 get_reset_reg(struct aspeed_clk_gate *gate) 204 { 205 if (gate->reset_idx < 32) 206 return ASPEED_G6_RESET_CTRL; 207 208 return ASPEED_G6_RESET_CTRL2; 209 } 210 211 static u32 get_clock_reg(struct aspeed_clk_gate *gate) 212 { 213 if (gate->clock_idx < 32) 214 return ASPEED_G6_CLK_STOP_CTRL; 215 216 return ASPEED_G6_CLK_STOP_CTRL2; 217 } 218 219 static int aspeed_g6_clk_is_enabled(struct clk_hw *hw) 220 { 221 struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw); 222 u32 clk = get_bit(gate->clock_idx); 223 u32 rst = get_bit(gate->reset_idx); 224 u32 reg; 225 u32 enval; 226 227 /* 228 * If the IP is in reset, treat the clock as not enabled, 229 * this happens with some clocks such as the USB one when 230 * coming from cold reset. Without this, aspeed_clk_enable() 231 * will fail to lift the reset. 232 */ 233 if (gate->reset_idx >= 0) { 234 regmap_read(gate->map, get_reset_reg(gate), ®); 235 236 if (reg & rst) 237 return 0; 238 } 239 240 regmap_read(gate->map, get_clock_reg(gate), ®); 241 242 enval = (gate->flags & CLK_GATE_SET_TO_DISABLE) ? 0 : clk; 243 244 return ((reg & clk) == enval) ? 1 : 0; 245 } 246 247 static int aspeed_g6_clk_enable(struct clk_hw *hw) 248 { 249 struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw); 250 unsigned long flags; 251 u32 clk = get_bit(gate->clock_idx); 252 u32 rst = get_bit(gate->reset_idx); 253 254 spin_lock_irqsave(gate->lock, flags); 255 256 if (aspeed_g6_clk_is_enabled(hw)) { 257 spin_unlock_irqrestore(gate->lock, flags); 258 return 0; 259 } 260 261 if (gate->reset_idx >= 0) { 262 /* Put IP in reset */ 263 regmap_write(gate->map, get_reset_reg(gate), rst); 264 /* Delay 100us */ 265 udelay(100); 266 } 267 268 /* Enable clock */ 269 if (gate->flags & CLK_GATE_SET_TO_DISABLE) { 270 /* Clock is clear to enable, so use set to clear register */ 271 regmap_write(gate->map, get_clock_reg(gate) + 0x04, clk); 272 } else { 273 /* Clock is set to enable, so use write to set register */ 274 regmap_write(gate->map, get_clock_reg(gate), clk); 275 } 276 277 if (gate->reset_idx >= 0) { 278 /* A delay of 10ms is specified by the ASPEED docs */ 279 mdelay(10); 280 /* Take IP out of reset */ 281 regmap_write(gate->map, get_reset_reg(gate) + 0x4, rst); 282 } 283 284 spin_unlock_irqrestore(gate->lock, flags); 285 286 return 0; 287 } 288 289 static void aspeed_g6_clk_disable(struct clk_hw *hw) 290 { 291 struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw); 292 unsigned long flags; 293 u32 clk = get_bit(gate->clock_idx); 294 295 spin_lock_irqsave(gate->lock, flags); 296 297 if (gate->flags & CLK_GATE_SET_TO_DISABLE) { 298 regmap_write(gate->map, get_clock_reg(gate), clk); 299 } else { 300 /* Use set to clear register */ 301 regmap_write(gate->map, get_clock_reg(gate) + 0x4, clk); 302 } 303 304 spin_unlock_irqrestore(gate->lock, flags); 305 } 306 307 static const struct clk_ops aspeed_g6_clk_gate_ops = { 308 .enable = aspeed_g6_clk_enable, 309 .disable = aspeed_g6_clk_disable, 310 .is_enabled = aspeed_g6_clk_is_enabled, 311 }; 312 313 static int aspeed_g6_reset_deassert(struct reset_controller_dev *rcdev, 314 unsigned long id) 315 { 316 struct aspeed_reset *ar = to_aspeed_reset(rcdev); 317 u32 rst = get_bit(id); 318 u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL; 319 320 /* Use set to clear register */ 321 return regmap_write(ar->map, reg + 0x04, rst); 322 } 323 324 static int aspeed_g6_reset_assert(struct reset_controller_dev *rcdev, 325 unsigned long id) 326 { 327 struct aspeed_reset *ar = to_aspeed_reset(rcdev); 328 u32 rst = get_bit(id); 329 u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL; 330 331 return regmap_write(ar->map, reg, rst); 332 } 333 334 static int aspeed_g6_reset_status(struct reset_controller_dev *rcdev, 335 unsigned long id) 336 { 337 struct aspeed_reset *ar = to_aspeed_reset(rcdev); 338 int ret; 339 u32 val; 340 u32 rst = get_bit(id); 341 u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL; 342 343 ret = regmap_read(ar->map, reg, &val); 344 if (ret) 345 return ret; 346 347 return !!(val & rst); 348 } 349 350 static const struct reset_control_ops aspeed_g6_reset_ops = { 351 .assert = aspeed_g6_reset_assert, 352 .deassert = aspeed_g6_reset_deassert, 353 .status = aspeed_g6_reset_status, 354 }; 355 356 static struct clk_hw *aspeed_g6_clk_hw_register_gate(struct device *dev, 357 const char *name, const char *parent_name, unsigned long flags, 358 struct regmap *map, u8 clock_idx, u8 reset_idx, 359 u8 clk_gate_flags, spinlock_t *lock) 360 { 361 struct aspeed_clk_gate *gate; 362 struct clk_init_data init; 363 struct clk_hw *hw; 364 int ret; 365 366 gate = kzalloc(sizeof(*gate), GFP_KERNEL); 367 if (!gate) 368 return ERR_PTR(-ENOMEM); 369 370 init.name = name; 371 init.ops = &aspeed_g6_clk_gate_ops; 372 init.flags = flags; 373 init.parent_names = parent_name ? &parent_name : NULL; 374 init.num_parents = parent_name ? 1 : 0; 375 376 gate->map = map; 377 gate->clock_idx = clock_idx; 378 gate->reset_idx = reset_idx; 379 gate->flags = clk_gate_flags; 380 gate->lock = lock; 381 gate->hw.init = &init; 382 383 hw = &gate->hw; 384 ret = clk_hw_register(dev, hw); 385 if (ret) { 386 kfree(gate); 387 hw = ERR_PTR(ret); 388 } 389 390 return hw; 391 } 392 393 static const char * const vclk_parent_names[] = { 394 "dpll", 395 "d1pll", 396 "hclk", 397 "mclk", 398 }; 399 400 static const char * const d1clk_parent_names[] = { 401 "dpll", 402 "epll", 403 "usb-phy-40m", 404 "gpioc6_clkin", 405 "dp_phy_pll", 406 }; 407 408 static int aspeed_g6_clk_probe(struct platform_device *pdev) 409 { 410 struct device *dev = &pdev->dev; 411 struct aspeed_reset *ar; 412 struct regmap *map; 413 struct clk_hw *hw; 414 u32 val, rate; 415 int i, ret; 416 417 map = syscon_node_to_regmap(dev->of_node); 418 if (IS_ERR(map)) { 419 dev_err(dev, "no syscon regmap\n"); 420 return PTR_ERR(map); 421 } 422 423 ar = devm_kzalloc(dev, sizeof(*ar), GFP_KERNEL); 424 if (!ar) 425 return -ENOMEM; 426 427 ar->map = map; 428 429 ar->rcdev.owner = THIS_MODULE; 430 ar->rcdev.nr_resets = 64; 431 ar->rcdev.ops = &aspeed_g6_reset_ops; 432 ar->rcdev.of_node = dev->of_node; 433 434 ret = devm_reset_controller_register(dev, &ar->rcdev); 435 if (ret) { 436 dev_err(dev, "could not register reset controller\n"); 437 return ret; 438 } 439 440 /* UART clock div13 setting */ 441 regmap_read(map, ASPEED_G6_MISC_CTRL, &val); 442 if (val & UART_DIV13_EN) 443 rate = 24000000 / 13; 444 else 445 rate = 24000000; 446 hw = clk_hw_register_fixed_rate(dev, "uart", NULL, 0, rate); 447 if (IS_ERR(hw)) 448 return PTR_ERR(hw); 449 aspeed_g6_clk_data->hws[ASPEED_CLK_UART] = hw; 450 451 /* UART6~13 clock div13 setting */ 452 regmap_read(map, 0x80, &val); 453 if (val & BIT(31)) 454 rate = 24000000 / 13; 455 else 456 rate = 24000000; 457 hw = clk_hw_register_fixed_rate(dev, "uartx", NULL, 0, rate); 458 if (IS_ERR(hw)) 459 return PTR_ERR(hw); 460 aspeed_g6_clk_data->hws[ASPEED_CLK_UARTX] = hw; 461 462 /* EMMC ext clock divider */ 463 hw = clk_hw_register_gate(dev, "emmc_extclk_gate", "hpll", 0, 464 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 15, 0, 465 &aspeed_g6_clk_lock); 466 if (IS_ERR(hw)) 467 return PTR_ERR(hw); 468 hw = clk_hw_register_divider_table(dev, "emmc_extclk", "emmc_extclk_gate", 0, 469 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 12, 3, 0, 470 ast2600_div_table, 471 &aspeed_g6_clk_lock); 472 if (IS_ERR(hw)) 473 return PTR_ERR(hw); 474 aspeed_g6_clk_data->hws[ASPEED_CLK_EMMC] = hw; 475 476 /* SD/SDIO clock divider and gate */ 477 hw = clk_hw_register_gate(dev, "sd_extclk_gate", "hpll", 0, 478 scu_g6_base + ASPEED_G6_CLK_SELECTION4, 31, 0, 479 &aspeed_g6_clk_lock); 480 if (IS_ERR(hw)) 481 return PTR_ERR(hw); 482 hw = clk_hw_register_divider_table(dev, "sd_extclk", "sd_extclk_gate", 483 0, scu_g6_base + ASPEED_G6_CLK_SELECTION4, 28, 3, 0, 484 ast2600_div_table, 485 &aspeed_g6_clk_lock); 486 if (IS_ERR(hw)) 487 return PTR_ERR(hw); 488 aspeed_g6_clk_data->hws[ASPEED_CLK_SDIO] = hw; 489 490 /* MAC1/2 RMII 50MHz RCLK */ 491 hw = clk_hw_register_fixed_rate(dev, "mac12rclk", "hpll", 0, 50000000); 492 if (IS_ERR(hw)) 493 return PTR_ERR(hw); 494 495 /* MAC1/2 AHB bus clock divider */ 496 hw = clk_hw_register_divider_table(dev, "mac12", "hpll", 0, 497 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 16, 3, 0, 498 ast2600_mac_div_table, 499 &aspeed_g6_clk_lock); 500 if (IS_ERR(hw)) 501 return PTR_ERR(hw); 502 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC12] = hw; 503 504 /* RMII1 50MHz (RCLK) output enable */ 505 hw = clk_hw_register_gate(dev, "mac1rclk", "mac12rclk", 0, 506 scu_g6_base + ASPEED_MAC12_CLK_DLY, 29, 0, 507 &aspeed_g6_clk_lock); 508 if (IS_ERR(hw)) 509 return PTR_ERR(hw); 510 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC1RCLK] = hw; 511 512 /* RMII2 50MHz (RCLK) output enable */ 513 hw = clk_hw_register_gate(dev, "mac2rclk", "mac12rclk", 0, 514 scu_g6_base + ASPEED_MAC12_CLK_DLY, 30, 0, 515 &aspeed_g6_clk_lock); 516 if (IS_ERR(hw)) 517 return PTR_ERR(hw); 518 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC2RCLK] = hw; 519 520 /* MAC1/2 RMII 50MHz RCLK */ 521 hw = clk_hw_register_fixed_rate(dev, "mac34rclk", "hclk", 0, 50000000); 522 if (IS_ERR(hw)) 523 return PTR_ERR(hw); 524 525 /* MAC3/4 AHB bus clock divider */ 526 hw = clk_hw_register_divider_table(dev, "mac34", "hpll", 0, 527 scu_g6_base + 0x310, 24, 3, 0, 528 ast2600_mac_div_table, 529 &aspeed_g6_clk_lock); 530 if (IS_ERR(hw)) 531 return PTR_ERR(hw); 532 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC34] = hw; 533 534 /* RMII3 50MHz (RCLK) output enable */ 535 hw = clk_hw_register_gate(dev, "mac3rclk", "mac34rclk", 0, 536 scu_g6_base + ASPEED_MAC34_CLK_DLY, 29, 0, 537 &aspeed_g6_clk_lock); 538 if (IS_ERR(hw)) 539 return PTR_ERR(hw); 540 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC3RCLK] = hw; 541 542 /* RMII4 50MHz (RCLK) output enable */ 543 hw = clk_hw_register_gate(dev, "mac4rclk", "mac34rclk", 0, 544 scu_g6_base + ASPEED_MAC34_CLK_DLY, 30, 0, 545 &aspeed_g6_clk_lock); 546 if (IS_ERR(hw)) 547 return PTR_ERR(hw); 548 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC4RCLK] = hw; 549 550 /* LPC Host (LHCLK) clock divider */ 551 hw = clk_hw_register_divider_table(dev, "lhclk", "hpll", 0, 552 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 20, 3, 0, 553 ast2600_div_table, 554 &aspeed_g6_clk_lock); 555 if (IS_ERR(hw)) 556 return PTR_ERR(hw); 557 aspeed_g6_clk_data->hws[ASPEED_CLK_LHCLK] = hw; 558 559 /* gfx d1clk : use dp clk */ 560 regmap_update_bits(map, ASPEED_G6_CLK_SELECTION1, GENMASK(10, 8), BIT(10)); 561 /* SoC Display clock selection */ 562 hw = clk_hw_register_mux(dev, "d1clk", d1clk_parent_names, 563 ARRAY_SIZE(d1clk_parent_names), 0, 564 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 8, 3, 0, 565 &aspeed_g6_clk_lock); 566 if (IS_ERR(hw)) 567 return PTR_ERR(hw); 568 aspeed_g6_clk_data->hws[ASPEED_CLK_D1CLK] = hw; 569 570 /* d1 clk div 0x308[17:15] x [14:12] - 8,7,6,5,4,3,2,1 */ 571 regmap_write(map, 0x308, 0x12000); /* 3x3 = 9 */ 572 573 /* P-Bus (BCLK) clock divider */ 574 hw = clk_hw_register_divider_table(dev, "bclk", "hpll", 0, 575 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 20, 3, 0, 576 ast2600_div_table, 577 &aspeed_g6_clk_lock); 578 if (IS_ERR(hw)) 579 return PTR_ERR(hw); 580 aspeed_g6_clk_data->hws[ASPEED_CLK_BCLK] = hw; 581 582 /* Video Capture clock selection */ 583 hw = clk_hw_register_mux(dev, "vclk", vclk_parent_names, 584 ARRAY_SIZE(vclk_parent_names), 0, 585 scu_g6_base + ASPEED_G6_CLK_SELECTION2, 12, 3, 0, 586 &aspeed_g6_clk_lock); 587 if (IS_ERR(hw)) 588 return PTR_ERR(hw); 589 aspeed_g6_clk_data->hws[ASPEED_CLK_VCLK] = hw; 590 591 /* Video Engine clock divider */ 592 hw = clk_hw_register_divider_table(dev, "eclk", NULL, 0, 593 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 28, 3, 0, 594 ast2600_eclk_div_table, 595 &aspeed_g6_clk_lock); 596 if (IS_ERR(hw)) 597 return PTR_ERR(hw); 598 aspeed_g6_clk_data->hws[ASPEED_CLK_ECLK] = hw; 599 600 for (i = 0; i < ARRAY_SIZE(aspeed_g6_gates); i++) { 601 const struct aspeed_gate_data *gd = &aspeed_g6_gates[i]; 602 u32 gate_flags; 603 604 /* 605 * Special case: the USB port 1 clock (bit 14) is always 606 * working the opposite way from the other ones. 607 */ 608 gate_flags = (gd->clock_idx == 14) ? 0 : CLK_GATE_SET_TO_DISABLE; 609 hw = aspeed_g6_clk_hw_register_gate(dev, 610 gd->name, 611 gd->parent_name, 612 gd->flags, 613 map, 614 gd->clock_idx, 615 gd->reset_idx, 616 gate_flags, 617 &aspeed_g6_clk_lock); 618 if (IS_ERR(hw)) 619 return PTR_ERR(hw); 620 aspeed_g6_clk_data->hws[i] = hw; 621 } 622 623 return 0; 624 }; 625 626 static const struct of_device_id aspeed_g6_clk_dt_ids[] = { 627 { .compatible = "aspeed,ast2600-scu" }, 628 { } 629 }; 630 631 static struct platform_driver aspeed_g6_clk_driver = { 632 .probe = aspeed_g6_clk_probe, 633 .driver = { 634 .name = "ast2600-clk", 635 .of_match_table = aspeed_g6_clk_dt_ids, 636 .suppress_bind_attrs = true, 637 }, 638 }; 639 builtin_platform_driver(aspeed_g6_clk_driver); 640 641 static const u32 ast2600_a0_axi_ahb_div_table[] = { 642 2, 2, 3, 5, 643 }; 644 645 static const u32 ast2600_a1_axi_ahb_div_table[] = { 646 4, 6, 2, 4, 647 }; 648 649 static void __init aspeed_g6_cc(struct regmap *map) 650 { 651 struct clk_hw *hw; 652 u32 val, div, chip_id, axi_div, ahb_div; 653 654 clk_hw_register_fixed_rate(NULL, "clkin", NULL, 0, 25000000); 655 656 /* 657 * High-speed PLL clock derived from the crystal. This the CPU clock, 658 * and we assume that it is enabled 659 */ 660 regmap_read(map, ASPEED_HPLL_PARAM, &val); 661 aspeed_g6_clk_data->hws[ASPEED_CLK_HPLL] = ast2600_calc_pll("hpll", val); 662 663 regmap_read(map, ASPEED_MPLL_PARAM, &val); 664 aspeed_g6_clk_data->hws[ASPEED_CLK_MPLL] = ast2600_calc_pll("mpll", val); 665 666 regmap_read(map, ASPEED_DPLL_PARAM, &val); 667 aspeed_g6_clk_data->hws[ASPEED_CLK_DPLL] = ast2600_calc_pll("dpll", val); 668 669 regmap_read(map, ASPEED_EPLL_PARAM, &val); 670 aspeed_g6_clk_data->hws[ASPEED_CLK_EPLL] = ast2600_calc_pll("epll", val); 671 672 regmap_read(map, ASPEED_APLL_PARAM, &val); 673 aspeed_g6_clk_data->hws[ASPEED_CLK_APLL] = ast2600_calc_apll("apll", val); 674 675 /* Strap bits 12:11 define the AXI/AHB clock frequency ratio (aka HCLK)*/ 676 regmap_read(map, ASPEED_G6_STRAP1, &val); 677 if (val & BIT(16)) 678 axi_div = 1; 679 else 680 axi_div = 2; 681 682 regmap_read(map, ASPEED_G6_SILICON_REV, &chip_id); 683 if (chip_id & BIT(16)) 684 ahb_div = ast2600_a1_axi_ahb_div_table[(val >> 11) & 0x3]; 685 else 686 ahb_div = ast2600_a0_axi_ahb_div_table[(val >> 11) & 0x3]; 687 688 hw = clk_hw_register_fixed_factor(NULL, "ahb", "hpll", 0, 1, axi_div * ahb_div); 689 aspeed_g6_clk_data->hws[ASPEED_CLK_AHB] = hw; 690 691 regmap_read(map, ASPEED_G6_CLK_SELECTION1, &val); 692 val = (val >> 23) & 0x7; 693 div = 4 * (val + 1); 694 hw = clk_hw_register_fixed_factor(NULL, "apb1", "hpll", 0, 1, div); 695 aspeed_g6_clk_data->hws[ASPEED_CLK_APB1] = hw; 696 697 regmap_read(map, ASPEED_G6_CLK_SELECTION4, &val); 698 val = (val >> 9) & 0x7; 699 div = 2 * (val + 1); 700 hw = clk_hw_register_fixed_factor(NULL, "apb2", "ahb", 0, 1, div); 701 aspeed_g6_clk_data->hws[ASPEED_CLK_APB2] = hw; 702 703 /* USB 2.0 port1 phy 40MHz clock */ 704 hw = clk_hw_register_fixed_rate(NULL, "usb-phy-40m", NULL, 0, 40000000); 705 aspeed_g6_clk_data->hws[ASPEED_CLK_USBPHY_40M] = hw; 706 }; 707 708 static void __init aspeed_g6_cc_init(struct device_node *np) 709 { 710 struct regmap *map; 711 int ret; 712 int i; 713 714 scu_g6_base = of_iomap(np, 0); 715 if (!scu_g6_base) 716 return; 717 718 aspeed_g6_clk_data = kzalloc(struct_size(aspeed_g6_clk_data, hws, 719 ASPEED_G6_NUM_CLKS), GFP_KERNEL); 720 if (!aspeed_g6_clk_data) 721 return; 722 723 /* 724 * This way all clocks fetched before the platform device probes, 725 * except those we assign here for early use, will be deferred. 726 */ 727 for (i = 0; i < ASPEED_G6_NUM_CLKS; i++) 728 aspeed_g6_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER); 729 730 /* 731 * We check that the regmap works on this very first access, 732 * but as this is an MMIO-backed regmap, subsequent regmap 733 * access is not going to fail and we skip error checks from 734 * this point. 735 */ 736 map = syscon_node_to_regmap(np); 737 if (IS_ERR(map)) { 738 pr_err("no syscon regmap\n"); 739 return; 740 } 741 742 aspeed_g6_cc(map); 743 aspeed_g6_clk_data->num = ASPEED_G6_NUM_CLKS; 744 ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, aspeed_g6_clk_data); 745 if (ret) 746 pr_err("failed to add DT provider: %d\n", ret); 747 }; 748 CLK_OF_DECLARE_DRIVER(aspeed_cc_g6, "aspeed,ast2600-scu", aspeed_g6_cc_init); 749