Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 1 | /* |
| 2 | * OMAP3-specific clock framework functions |
| 3 | * |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 4 | * Copyright (C) 2007-2008 Texas Instruments, Inc. |
| 5 | * Copyright (C) 2007-2008 Nokia Corporation |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 6 | * |
| 7 | * Written by Paul Walmsley |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 8 | * Testing and integration fixes by Jouni Högander |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 9 | * |
| 10 | * Parts of this code are based on code written by |
| 11 | * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License version 2 as |
| 15 | * published by the Free Software Foundation. |
| 16 | */ |
| 17 | #undef DEBUG |
| 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/device.h> |
| 22 | #include <linux/list.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/delay.h> |
| 25 | #include <linux/clk.h> |
| 26 | #include <linux/io.h> |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 27 | #include <linux/limits.h> |
Russell King | fbd3bdb | 2008-09-06 12:13:59 +0100 | [diff] [blame] | 28 | #include <linux/bitops.h> |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 29 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 30 | #include <mach/clock.h> |
| 31 | #include <mach/sram.h> |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 32 | #include <asm/div64.h> |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 33 | |
| 34 | #include "memory.h" |
| 35 | #include "clock.h" |
| 36 | #include "clock34xx.h" |
| 37 | #include "prm.h" |
| 38 | #include "prm-regbits-34xx.h" |
| 39 | #include "cm.h" |
| 40 | #include "cm-regbits-34xx.h" |
| 41 | |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 42 | /* CM_AUTOIDLE_PLL*.AUTO_* bit values */ |
| 43 | #define DPLL_AUTOIDLE_DISABLE 0x0 |
| 44 | #define DPLL_AUTOIDLE_LOW_POWER_STOP 0x1 |
| 45 | |
| 46 | #define MAX_DPLL_WAIT_TRIES 1000000 |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 47 | |
| 48 | /** |
| 49 | * omap3_dpll_recalc - recalculate DPLL rate |
| 50 | * @clk: DPLL struct clk |
| 51 | * |
| 52 | * Recalculate and propagate the DPLL rate. |
| 53 | */ |
| 54 | static void omap3_dpll_recalc(struct clk *clk) |
| 55 | { |
| 56 | clk->rate = omap2_get_dpll_rate(clk); |
| 57 | |
| 58 | propagate_rate(clk); |
| 59 | } |
| 60 | |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 61 | /* _omap3_dpll_write_clken - write clken_bits arg to a DPLL's enable bits */ |
| 62 | static void _omap3_dpll_write_clken(struct clk *clk, u8 clken_bits) |
| 63 | { |
| 64 | const struct dpll_data *dd; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 65 | u32 v; |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 66 | |
| 67 | dd = clk->dpll_data; |
| 68 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 69 | v = __raw_readl(dd->control_reg); |
| 70 | v &= ~dd->enable_mask; |
| 71 | v |= clken_bits << __ffs(dd->enable_mask); |
| 72 | __raw_writel(v, dd->control_reg); |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | /* _omap3_wait_dpll_status: wait for a DPLL to enter a specific state */ |
| 76 | static int _omap3_wait_dpll_status(struct clk *clk, u8 state) |
| 77 | { |
| 78 | const struct dpll_data *dd; |
| 79 | int i = 0; |
| 80 | int ret = -EINVAL; |
| 81 | u32 idlest_mask; |
| 82 | |
| 83 | dd = clk->dpll_data; |
| 84 | |
| 85 | state <<= dd->idlest_bit; |
| 86 | idlest_mask = 1 << dd->idlest_bit; |
| 87 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 88 | while (((__raw_readl(dd->idlest_reg) & idlest_mask) != state) && |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 89 | i < MAX_DPLL_WAIT_TRIES) { |
| 90 | i++; |
| 91 | udelay(1); |
| 92 | } |
| 93 | |
| 94 | if (i == MAX_DPLL_WAIT_TRIES) { |
| 95 | printk(KERN_ERR "clock: %s failed transition to '%s'\n", |
| 96 | clk->name, (state) ? "locked" : "bypassed"); |
| 97 | } else { |
| 98 | pr_debug("clock: %s transition to '%s' in %d loops\n", |
| 99 | clk->name, (state) ? "locked" : "bypassed", i); |
| 100 | |
| 101 | ret = 0; |
| 102 | } |
| 103 | |
| 104 | return ret; |
| 105 | } |
| 106 | |
| 107 | /* Non-CORE DPLL (e.g., DPLLs that do not control SDRC) clock functions */ |
| 108 | |
| 109 | /* |
| 110 | * _omap3_noncore_dpll_lock - instruct a DPLL to lock and wait for readiness |
| 111 | * @clk: pointer to a DPLL struct clk |
| 112 | * |
| 113 | * Instructs a non-CORE DPLL to lock. Waits for the DPLL to report |
| 114 | * readiness before returning. Will save and restore the DPLL's |
| 115 | * autoidle state across the enable, per the CDP code. If the DPLL |
| 116 | * locked successfully, return 0; if the DPLL did not lock in the time |
| 117 | * allotted, or DPLL3 was passed in, return -EINVAL. |
| 118 | */ |
| 119 | static int _omap3_noncore_dpll_lock(struct clk *clk) |
| 120 | { |
| 121 | u8 ai; |
| 122 | int r; |
| 123 | |
| 124 | if (clk == &dpll3_ck) |
| 125 | return -EINVAL; |
| 126 | |
| 127 | pr_debug("clock: locking DPLL %s\n", clk->name); |
| 128 | |
| 129 | ai = omap3_dpll_autoidle_read(clk); |
| 130 | |
| 131 | _omap3_dpll_write_clken(clk, DPLL_LOCKED); |
| 132 | |
| 133 | if (ai) { |
| 134 | /* |
| 135 | * If no downstream clocks are enabled, CM_IDLEST bit |
| 136 | * may never become active, so don't wait for DPLL to lock. |
| 137 | */ |
| 138 | r = 0; |
| 139 | omap3_dpll_allow_idle(clk); |
| 140 | } else { |
| 141 | r = _omap3_wait_dpll_status(clk, 1); |
| 142 | omap3_dpll_deny_idle(clk); |
| 143 | }; |
| 144 | |
| 145 | return r; |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * omap3_noncore_dpll_bypass - instruct a DPLL to bypass and wait for readiness |
| 150 | * @clk: pointer to a DPLL struct clk |
| 151 | * |
| 152 | * Instructs a non-CORE DPLL to enter low-power bypass mode. In |
| 153 | * bypass mode, the DPLL's rate is set equal to its parent clock's |
| 154 | * rate. Waits for the DPLL to report readiness before returning. |
| 155 | * Will save and restore the DPLL's autoidle state across the enable, |
| 156 | * per the CDP code. If the DPLL entered bypass mode successfully, |
| 157 | * return 0; if the DPLL did not enter bypass in the time allotted, or |
| 158 | * DPLL3 was passed in, or the DPLL does not support low-power bypass, |
| 159 | * return -EINVAL. |
| 160 | */ |
| 161 | static int _omap3_noncore_dpll_bypass(struct clk *clk) |
| 162 | { |
| 163 | int r; |
| 164 | u8 ai; |
| 165 | |
| 166 | if (clk == &dpll3_ck) |
| 167 | return -EINVAL; |
| 168 | |
| 169 | if (!(clk->dpll_data->modes & (1 << DPLL_LOW_POWER_BYPASS))) |
| 170 | return -EINVAL; |
| 171 | |
| 172 | pr_debug("clock: configuring DPLL %s for low-power bypass\n", |
| 173 | clk->name); |
| 174 | |
| 175 | ai = omap3_dpll_autoidle_read(clk); |
| 176 | |
| 177 | _omap3_dpll_write_clken(clk, DPLL_LOW_POWER_BYPASS); |
| 178 | |
| 179 | r = _omap3_wait_dpll_status(clk, 0); |
| 180 | |
| 181 | if (ai) |
| 182 | omap3_dpll_allow_idle(clk); |
| 183 | else |
| 184 | omap3_dpll_deny_idle(clk); |
| 185 | |
| 186 | return r; |
| 187 | } |
| 188 | |
| 189 | /* |
| 190 | * _omap3_noncore_dpll_stop - instruct a DPLL to stop |
| 191 | * @clk: pointer to a DPLL struct clk |
| 192 | * |
| 193 | * Instructs a non-CORE DPLL to enter low-power stop. Will save and |
| 194 | * restore the DPLL's autoidle state across the stop, per the CDP |
| 195 | * code. If DPLL3 was passed in, or the DPLL does not support |
| 196 | * low-power stop, return -EINVAL; otherwise, return 0. |
| 197 | */ |
| 198 | static int _omap3_noncore_dpll_stop(struct clk *clk) |
| 199 | { |
| 200 | u8 ai; |
| 201 | |
| 202 | if (clk == &dpll3_ck) |
| 203 | return -EINVAL; |
| 204 | |
| 205 | if (!(clk->dpll_data->modes & (1 << DPLL_LOW_POWER_STOP))) |
| 206 | return -EINVAL; |
| 207 | |
| 208 | pr_debug("clock: stopping DPLL %s\n", clk->name); |
| 209 | |
| 210 | ai = omap3_dpll_autoidle_read(clk); |
| 211 | |
| 212 | _omap3_dpll_write_clken(clk, DPLL_LOW_POWER_STOP); |
| 213 | |
| 214 | if (ai) |
| 215 | omap3_dpll_allow_idle(clk); |
| 216 | else |
| 217 | omap3_dpll_deny_idle(clk); |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * omap3_noncore_dpll_enable - instruct a DPLL to enter bypass or lock mode |
| 224 | * @clk: pointer to a DPLL struct clk |
| 225 | * |
| 226 | * Instructs a non-CORE DPLL to enable, e.g., to enter bypass or lock. |
| 227 | * The choice of modes depends on the DPLL's programmed rate: if it is |
| 228 | * the same as the DPLL's parent clock, it will enter bypass; |
| 229 | * otherwise, it will enter lock. This code will wait for the DPLL to |
| 230 | * indicate readiness before returning, unless the DPLL takes too long |
| 231 | * to enter the target state. Intended to be used as the struct clk's |
| 232 | * enable function. If DPLL3 was passed in, or the DPLL does not |
| 233 | * support low-power stop, or if the DPLL took too long to enter |
| 234 | * bypass or lock, return -EINVAL; otherwise, return 0. |
| 235 | */ |
| 236 | static int omap3_noncore_dpll_enable(struct clk *clk) |
| 237 | { |
| 238 | int r; |
| 239 | |
| 240 | if (clk == &dpll3_ck) |
| 241 | return -EINVAL; |
| 242 | |
| 243 | if (clk->parent->rate == clk_get_rate(clk)) |
| 244 | r = _omap3_noncore_dpll_bypass(clk); |
| 245 | else |
| 246 | r = _omap3_noncore_dpll_lock(clk); |
| 247 | |
| 248 | return r; |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * omap3_noncore_dpll_enable - instruct a DPLL to enter bypass or lock mode |
| 253 | * @clk: pointer to a DPLL struct clk |
| 254 | * |
| 255 | * Instructs a non-CORE DPLL to enable, e.g., to enter bypass or lock. |
| 256 | * The choice of modes depends on the DPLL's programmed rate: if it is |
| 257 | * the same as the DPLL's parent clock, it will enter bypass; |
| 258 | * otherwise, it will enter lock. This code will wait for the DPLL to |
| 259 | * indicate readiness before returning, unless the DPLL takes too long |
| 260 | * to enter the target state. Intended to be used as the struct clk's |
| 261 | * enable function. If DPLL3 was passed in, or the DPLL does not |
| 262 | * support low-power stop, or if the DPLL took too long to enter |
| 263 | * bypass or lock, return -EINVAL; otherwise, return 0. |
| 264 | */ |
| 265 | static void omap3_noncore_dpll_disable(struct clk *clk) |
| 266 | { |
| 267 | if (clk == &dpll3_ck) |
| 268 | return; |
| 269 | |
| 270 | _omap3_noncore_dpll_stop(clk); |
| 271 | } |
| 272 | |
| 273 | /** |
| 274 | * omap3_dpll_autoidle_read - read a DPLL's autoidle bits |
| 275 | * @clk: struct clk * of the DPLL to read |
| 276 | * |
| 277 | * Return the DPLL's autoidle bits, shifted down to bit 0. Returns |
| 278 | * -EINVAL if passed a null pointer or if the struct clk does not |
| 279 | * appear to refer to a DPLL. |
| 280 | */ |
| 281 | static u32 omap3_dpll_autoidle_read(struct clk *clk) |
| 282 | { |
| 283 | const struct dpll_data *dd; |
| 284 | u32 v; |
| 285 | |
| 286 | if (!clk || !clk->dpll_data) |
| 287 | return -EINVAL; |
| 288 | |
| 289 | dd = clk->dpll_data; |
| 290 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 291 | v = __raw_readl(dd->autoidle_reg); |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 292 | v &= dd->autoidle_mask; |
| 293 | v >>= __ffs(dd->autoidle_mask); |
| 294 | |
| 295 | return v; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * omap3_dpll_allow_idle - enable DPLL autoidle bits |
| 300 | * @clk: struct clk * of the DPLL to operate on |
| 301 | * |
| 302 | * Enable DPLL automatic idle control. This automatic idle mode |
| 303 | * switching takes effect only when the DPLL is locked, at least on |
| 304 | * OMAP3430. The DPLL will enter low-power stop when its downstream |
| 305 | * clocks are gated. No return value. |
| 306 | */ |
| 307 | static void omap3_dpll_allow_idle(struct clk *clk) |
| 308 | { |
| 309 | const struct dpll_data *dd; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 310 | u32 v; |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 311 | |
| 312 | if (!clk || !clk->dpll_data) |
| 313 | return; |
| 314 | |
| 315 | dd = clk->dpll_data; |
| 316 | |
| 317 | /* |
| 318 | * REVISIT: CORE DPLL can optionally enter low-power bypass |
| 319 | * by writing 0x5 instead of 0x1. Add some mechanism to |
| 320 | * optionally enter this mode. |
| 321 | */ |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 322 | v = __raw_readl(dd->autoidle_reg); |
| 323 | v &= ~dd->autoidle_mask; |
| 324 | v |= DPLL_AUTOIDLE_LOW_POWER_STOP << __ffs(dd->autoidle_mask); |
| 325 | __raw_writel(v, dd->autoidle_reg); |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | /** |
| 329 | * omap3_dpll_deny_idle - prevent DPLL from automatically idling |
| 330 | * @clk: struct clk * of the DPLL to operate on |
| 331 | * |
| 332 | * Disable DPLL automatic idle control. No return value. |
| 333 | */ |
| 334 | static void omap3_dpll_deny_idle(struct clk *clk) |
| 335 | { |
| 336 | const struct dpll_data *dd; |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 337 | u32 v; |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 338 | |
| 339 | if (!clk || !clk->dpll_data) |
| 340 | return; |
| 341 | |
| 342 | dd = clk->dpll_data; |
| 343 | |
Paul Walmsley | ad67ef6 | 2008-08-19 11:08:40 +0300 | [diff] [blame] | 344 | v = __raw_readl(dd->autoidle_reg); |
| 345 | v &= ~dd->autoidle_mask; |
| 346 | v |= DPLL_AUTOIDLE_DISABLE << __ffs(dd->autoidle_mask); |
| 347 | __raw_writel(v, dd->autoidle_reg); |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | /* Clock control for DPLL outputs */ |
| 351 | |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 352 | /** |
| 353 | * omap3_clkoutx2_recalc - recalculate DPLL X2 output virtual clock rate |
| 354 | * @clk: DPLL output struct clk |
| 355 | * |
| 356 | * Using parent clock DPLL data, look up DPLL state. If locked, set our |
| 357 | * rate to the dpll_clk * 2; otherwise, just use dpll_clk. |
| 358 | */ |
| 359 | static void omap3_clkoutx2_recalc(struct clk *clk) |
| 360 | { |
| 361 | const struct dpll_data *dd; |
| 362 | u32 v; |
| 363 | struct clk *pclk; |
| 364 | |
| 365 | /* Walk up the parents of clk, looking for a DPLL */ |
| 366 | pclk = clk->parent; |
| 367 | while (pclk && !pclk->dpll_data) |
| 368 | pclk = pclk->parent; |
| 369 | |
| 370 | /* clk does not have a DPLL as a parent? */ |
| 371 | WARN_ON(!pclk); |
| 372 | |
| 373 | dd = pclk->dpll_data; |
| 374 | |
| 375 | WARN_ON(!dd->control_reg || !dd->enable_mask); |
| 376 | |
| 377 | v = __raw_readl(dd->control_reg) & dd->enable_mask; |
| 378 | v >>= __ffs(dd->enable_mask); |
| 379 | if (v != DPLL_LOCKED) |
| 380 | clk->rate = clk->parent->rate; |
| 381 | else |
| 382 | clk->rate = clk->parent->rate * 2; |
| 383 | |
| 384 | if (clk->flags & RATE_PROPAGATES) |
| 385 | propagate_rate(clk); |
| 386 | } |
| 387 | |
Paul Walmsley | 542313c | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 388 | /* Common clock code */ |
| 389 | |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 390 | /* |
| 391 | * As it is structured now, this will prevent an OMAP2/3 multiboot |
| 392 | * kernel from compiling. This will need further attention. |
| 393 | */ |
| 394 | #if defined(CONFIG_ARCH_OMAP3) |
| 395 | |
| 396 | static struct clk_functions omap2_clk_functions = { |
| 397 | .clk_enable = omap2_clk_enable, |
| 398 | .clk_disable = omap2_clk_disable, |
| 399 | .clk_round_rate = omap2_clk_round_rate, |
| 400 | .clk_set_rate = omap2_clk_set_rate, |
| 401 | .clk_set_parent = omap2_clk_set_parent, |
| 402 | .clk_disable_unused = omap2_clk_disable_unused, |
| 403 | }; |
| 404 | |
| 405 | /* |
| 406 | * Set clocks for bypass mode for reboot to work. |
| 407 | */ |
| 408 | void omap2_clk_prepare_for_reboot(void) |
| 409 | { |
| 410 | /* REVISIT: Not ready for 343x */ |
| 411 | #if 0 |
| 412 | u32 rate; |
| 413 | |
| 414 | if (vclk == NULL || sclk == NULL) |
| 415 | return; |
| 416 | |
| 417 | rate = clk_get_rate(sclk); |
| 418 | clk_set_rate(vclk, rate); |
| 419 | #endif |
| 420 | } |
| 421 | |
| 422 | /* REVISIT: Move this init stuff out into clock.c */ |
| 423 | |
| 424 | /* |
| 425 | * Switch the MPU rate if specified on cmdline. |
| 426 | * We cannot do this early until cmdline is parsed. |
| 427 | */ |
| 428 | static int __init omap2_clk_arch_init(void) |
| 429 | { |
| 430 | if (!mpurate) |
| 431 | return -EINVAL; |
| 432 | |
| 433 | /* REVISIT: not yet ready for 343x */ |
| 434 | #if 0 |
| 435 | if (omap2_select_table_rate(&virt_prcm_set, mpurate)) |
| 436 | printk(KERN_ERR "Could not find matching MPU rate\n"); |
| 437 | #endif |
| 438 | |
| 439 | recalculate_root_clocks(); |
| 440 | |
| 441 | printk(KERN_INFO "Switched to new clocking rate (Crystal/DPLL3/MPU): " |
| 442 | "%ld.%01ld/%ld/%ld MHz\n", |
| 443 | (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10, |
| 444 | (core_ck.rate / 1000000), (dpll1_fck.rate / 1000000)) ; |
| 445 | |
| 446 | return 0; |
| 447 | } |
| 448 | arch_initcall(omap2_clk_arch_init); |
| 449 | |
| 450 | int __init omap2_clk_init(void) |
| 451 | { |
| 452 | /* struct prcm_config *prcm; */ |
| 453 | struct clk **clkp; |
| 454 | /* u32 clkrate; */ |
| 455 | u32 cpu_clkflg; |
| 456 | |
| 457 | /* REVISIT: Ultimately this will be used for multiboot */ |
| 458 | #if 0 |
| 459 | if (cpu_is_omap242x()) { |
| 460 | cpu_mask = RATE_IN_242X; |
| 461 | cpu_clkflg = CLOCK_IN_OMAP242X; |
| 462 | clkp = onchip_24xx_clks; |
| 463 | } else if (cpu_is_omap2430()) { |
| 464 | cpu_mask = RATE_IN_243X; |
| 465 | cpu_clkflg = CLOCK_IN_OMAP243X; |
| 466 | clkp = onchip_24xx_clks; |
| 467 | } |
| 468 | #endif |
| 469 | if (cpu_is_omap34xx()) { |
| 470 | cpu_mask = RATE_IN_343X; |
| 471 | cpu_clkflg = CLOCK_IN_OMAP343X; |
| 472 | clkp = onchip_34xx_clks; |
| 473 | |
| 474 | /* |
| 475 | * Update this if there are further clock changes between ES2 |
| 476 | * and production parts |
| 477 | */ |
| 478 | if (is_sil_rev_equal_to(OMAP3430_REV_ES1_0)) { |
| 479 | /* No 3430ES1-only rates exist, so no RATE_IN_3430ES1 */ |
| 480 | cpu_clkflg |= CLOCK_IN_OMAP3430ES1; |
| 481 | } else { |
| 482 | cpu_mask |= RATE_IN_3430ES2; |
| 483 | cpu_clkflg |= CLOCK_IN_OMAP3430ES2; |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | clk_init(&omap2_clk_functions); |
| 488 | |
| 489 | for (clkp = onchip_34xx_clks; |
| 490 | clkp < onchip_34xx_clks + ARRAY_SIZE(onchip_34xx_clks); |
| 491 | clkp++) { |
Paul Walmsley | 333943b | 2008-08-19 11:08:45 +0300 | [diff] [blame] | 492 | if ((*clkp)->flags & cpu_clkflg) { |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 493 | clk_register(*clkp); |
Paul Walmsley | 333943b | 2008-08-19 11:08:45 +0300 | [diff] [blame] | 494 | omap2_init_clk_clkdm(*clkp); |
| 495 | } |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | /* REVISIT: Not yet ready for OMAP3 */ |
| 499 | #if 0 |
| 500 | /* Check the MPU rate set by bootloader */ |
| 501 | clkrate = omap2_get_dpll_rate_24xx(&dpll_ck); |
| 502 | for (prcm = rate_table; prcm->mpu_speed; prcm++) { |
| 503 | if (!(prcm->flags & cpu_mask)) |
| 504 | continue; |
| 505 | if (prcm->xtal_speed != sys_ck.rate) |
| 506 | continue; |
| 507 | if (prcm->dpll_speed <= clkrate) |
| 508 | break; |
| 509 | } |
| 510 | curr_prcm_set = prcm; |
| 511 | #endif |
| 512 | |
| 513 | recalculate_root_clocks(); |
| 514 | |
Roman Tereshonkov | 3760d31 | 2008-03-13 21:35:09 +0200 | [diff] [blame] | 515 | printk(KERN_INFO "Clocking rate (Crystal/DPLL/ARM core): " |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 516 | "%ld.%01ld/%ld/%ld MHz\n", |
| 517 | (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10, |
Roman Tereshonkov | 3760d31 | 2008-03-13 21:35:09 +0200 | [diff] [blame] | 518 | (core_ck.rate / 1000000), (arm_fck.rate / 1000000)); |
Paul Walmsley | 02e19a9 | 2008-03-18 15:09:51 +0200 | [diff] [blame] | 519 | |
| 520 | /* |
| 521 | * Only enable those clocks we will need, let the drivers |
| 522 | * enable other clocks as necessary |
| 523 | */ |
| 524 | clk_enable_init_clocks(); |
| 525 | |
| 526 | /* Avoid sleeping during omap2_clk_prepare_for_reboot() */ |
| 527 | /* REVISIT: not yet ready for 343x */ |
| 528 | #if 0 |
| 529 | vclk = clk_get(NULL, "virt_prcm_set"); |
| 530 | sclk = clk_get(NULL, "sys_ck"); |
| 531 | #endif |
| 532 | return 0; |
| 533 | } |
| 534 | |
| 535 | #endif |