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1/*
2 * linux/arch/arm/mach-omap2/clock.c
3 *
4 * Copyright (C) 2005-2008 Texas Instruments, Inc.
5 * Copyright (C) 2004-2010 Nokia Corporation
6 *
7 * Contacts:
8 * Richard Woodruff <r-woodruff2@ti.com>
9 * Paul Walmsley
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15#undef DEBUG
16
17#include <linux/kernel.h>
18#include <linux/list.h>
19#include <linux/errno.h>
20#include <linux/err.h>
21#include <linux/delay.h>
22#include <linux/clk.h>
23#include <linux/io.h>
24#include <linux/bitops.h>
25#include <trace/events/power.h>
26
27#include <asm/cpu.h>
28#include <plat/clock.h>
29#include "clockdomain.h"
30#include <plat/cpu.h>
31#include <plat/prcm.h>
32
33#include "clock.h"
34#include "cm2xxx_3xxx.h"
35#include "cm-regbits-24xx.h"
36#include "cm-regbits-34xx.h"
37
38u16 cpu_mask;
39
40/*
41 * clkdm_control: if true, then when a clock is enabled in the
42 * hardware, its clockdomain will first be enabled; and when a clock
43 * is disabled in the hardware, its clockdomain will be disabled
44 * afterwards.
45 */
46static bool clkdm_control = true;
47
48/*
49 * OMAP2+ specific clock functions
50 */
51
52/* Private functions */
53
54/**
55 * _omap2_module_wait_ready - wait for an OMAP module to leave IDLE
56 * @clk: struct clk * belonging to the module
57 *
58 * If the necessary clocks for the OMAP hardware IP block that
59 * corresponds to clock @clk are enabled, then wait for the module to
60 * indicate readiness (i.e., to leave IDLE). This code does not
61 * belong in the clock code and will be moved in the medium term to
62 * module-dependent code. No return value.
63 */
64static void _omap2_module_wait_ready(struct clk *clk)
65{
66 void __iomem *companion_reg, *idlest_reg;
67 u8 other_bit, idlest_bit, idlest_val;
68
69 /* Not all modules have multiple clocks that their IDLEST depends on */
70 if (clk->ops->find_companion) {
71 clk->ops->find_companion(clk, &companion_reg, &other_bit);
72 if (!(__raw_readl(companion_reg) & (1 << other_bit)))
73 return;
74 }
75
76 clk->ops->find_idlest(clk, &idlest_reg, &idlest_bit, &idlest_val);
77
78 omap2_cm_wait_idlest(idlest_reg, (1 << idlest_bit), idlest_val,
79 clk->name);
80}
81
82/* Public functions */
83
84/**
85 * omap2_init_clk_clkdm - look up a clockdomain name, store pointer in clk
86 * @clk: OMAP clock struct ptr to use
87 *
88 * Convert a clockdomain name stored in a struct clk 'clk' into a
89 * clockdomain pointer, and save it into the struct clk. Intended to be
90 * called during clk_register(). No return value.
91 */
92void omap2_init_clk_clkdm(struct clk *clk)
93{
94 struct clockdomain *clkdm;
95
96 if (!clk->clkdm_name)
97 return;
98
99 clkdm = clkdm_lookup(clk->clkdm_name);
100 if (clkdm) {
101 pr_debug("clock: associated clk %s to clkdm %s\n",
102 clk->name, clk->clkdm_name);
103 clk->clkdm = clkdm;
104 } else {
105 pr_debug("clock: could not associate clk %s to "
106 "clkdm %s\n", clk->name, clk->clkdm_name);
107 }
108}
109
110/**
111 * omap2_clk_disable_clkdm_control - disable clkdm control on clk enable/disable
112 *
113 * Prevent the OMAP clock code from calling into the clockdomain code
114 * when a hardware clock in that clockdomain is enabled or disabled.
115 * Intended to be called at init time from omap*_clk_init(). No
116 * return value.
117 */
118void __init omap2_clk_disable_clkdm_control(void)
119{
120 clkdm_control = false;
121}
122
123/**
124 * omap2_clk_dflt_find_companion - find companion clock to @clk
125 * @clk: struct clk * to find the companion clock of
126 * @other_reg: void __iomem ** to return the companion clock CM_*CLKEN va in
127 * @other_bit: u8 ** to return the companion clock bit shift in
128 *
129 * Note: We don't need special code here for INVERT_ENABLE for the
130 * time being since INVERT_ENABLE only applies to clocks enabled by
131 * CM_CLKEN_PLL
132 *
133 * Convert CM_ICLKEN* <-> CM_FCLKEN*. This conversion assumes it's
134 * just a matter of XORing the bits.
135 *
136 * Some clocks don't have companion clocks. For example, modules with
137 * only an interface clock (such as MAILBOXES) don't have a companion
138 * clock. Right now, this code relies on the hardware exporting a bit
139 * in the correct companion register that indicates that the
140 * nonexistent 'companion clock' is active. Future patches will
141 * associate this type of code with per-module data structures to
142 * avoid this issue, and remove the casts. No return value.
143 */
144void omap2_clk_dflt_find_companion(struct clk *clk, void __iomem **other_reg,
145 u8 *other_bit)
146{
147 u32 r;
148
149 /*
150 * Convert CM_ICLKEN* <-> CM_FCLKEN*. This conversion assumes
151 * it's just a matter of XORing the bits.
152 */
153 r = ((__force u32)clk->enable_reg ^ (CM_FCLKEN ^ CM_ICLKEN));
154
155 *other_reg = (__force void __iomem *)r;
156 *other_bit = clk->enable_bit;
157}
158
159/**
160 * omap2_clk_dflt_find_idlest - find CM_IDLEST reg va, bit shift for @clk
161 * @clk: struct clk * to find IDLEST info for
162 * @idlest_reg: void __iomem ** to return the CM_IDLEST va in
163 * @idlest_bit: u8 * to return the CM_IDLEST bit shift in
164 * @idlest_val: u8 * to return the idle status indicator
165 *
166 * Return the CM_IDLEST register address and bit shift corresponding
167 * to the module that "owns" this clock. This default code assumes
168 * that the CM_IDLEST bit shift is the CM_*CLKEN bit shift, and that
169 * the IDLEST register address ID corresponds to the CM_*CLKEN
170 * register address ID (e.g., that CM_FCLKEN2 corresponds to
171 * CM_IDLEST2). This is not true for all modules. No return value.
172 */
173void omap2_clk_dflt_find_idlest(struct clk *clk, void __iomem **idlest_reg,
174 u8 *idlest_bit, u8 *idlest_val)
175{
176 u32 r;
177
178 r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20);
179 *idlest_reg = (__force void __iomem *)r;
180 *idlest_bit = clk->enable_bit;
181
182 /*
183 * 24xx uses 0 to indicate not ready, and 1 to indicate ready.
184 * 34xx reverses this, just to keep us on our toes
185 * AM35xx uses both, depending on the module.
186 */
187 if (cpu_is_omap24xx())
188 *idlest_val = OMAP24XX_CM_IDLEST_VAL;
189 else if (cpu_is_omap34xx())
190 *idlest_val = OMAP34XX_CM_IDLEST_VAL;
191 else
192 BUG();
193
194}
195
196int omap2_dflt_clk_enable(struct clk *clk)
197{
198 u32 v;
199
200 if (unlikely(clk->enable_reg == NULL)) {
201 pr_err("clock.c: Enable for %s without enable code\n",
202 clk->name);
203 return 0; /* REVISIT: -EINVAL */
204 }
205
206 v = __raw_readl(clk->enable_reg);
207 if (clk->flags & INVERT_ENABLE)
208 v &= ~(1 << clk->enable_bit);
209 else
210 v |= (1 << clk->enable_bit);
211 __raw_writel(v, clk->enable_reg);
212 v = __raw_readl(clk->enable_reg); /* OCP barrier */
213
214 if (clk->ops->find_idlest)
215 _omap2_module_wait_ready(clk);
216
217 return 0;
218}
219
220void omap2_dflt_clk_disable(struct clk *clk)
221{
222 u32 v;
223
224 if (!clk->enable_reg) {
225 /*
226 * 'Independent' here refers to a clock which is not
227 * controlled by its parent.
228 */
229 printk(KERN_ERR "clock: clk_disable called on independent "
230 "clock %s which has no enable_reg\n", clk->name);
231 return;
232 }
233
234 v = __raw_readl(clk->enable_reg);
235 if (clk->flags & INVERT_ENABLE)
236 v |= (1 << clk->enable_bit);
237 else
238 v &= ~(1 << clk->enable_bit);
239 __raw_writel(v, clk->enable_reg);
240 /* No OCP barrier needed here since it is a disable operation */
241}
242
243const struct clkops clkops_omap2_dflt_wait = {
244 .enable = omap2_dflt_clk_enable,
245 .disable = omap2_dflt_clk_disable,
246 .find_companion = omap2_clk_dflt_find_companion,
247 .find_idlest = omap2_clk_dflt_find_idlest,
248};
249
250const struct clkops clkops_omap2_dflt = {
251 .enable = omap2_dflt_clk_enable,
252 .disable = omap2_dflt_clk_disable,
253};
254
255/**
256 * omap2_clk_disable - disable a clock, if the system is not using it
257 * @clk: struct clk * to disable
258 *
259 * Decrements the usecount on struct clk @clk. If there are no users
260 * left, call the clkops-specific clock disable function to disable it
261 * in hardware. If the clock is part of a clockdomain (which they all
262 * should be), request that the clockdomain be disabled. (It too has
263 * a usecount, and so will not be disabled in the hardware until it no
264 * longer has any users.) If the clock has a parent clock (most of
265 * them do), then call ourselves, recursing on the parent clock. This
266 * can cause an entire branch of the clock tree to be powered off by
267 * simply disabling one clock. Intended to be called with the clockfw_lock
268 * spinlock held. No return value.
269 */
270void omap2_clk_disable(struct clk *clk)
271{
272 if (clk->usecount == 0) {
273 WARN(1, "clock: %s: omap2_clk_disable() called, but usecount "
274 "already 0?", clk->name);
275 return;
276 }
277
278 pr_debug("clock: %s: decrementing usecount\n", clk->name);
279
280 clk->usecount--;
281
282 if (clk->usecount > 0)
283 return;
284
285 pr_debug("clock: %s: disabling in hardware\n", clk->name);
286
287 if (clk->ops && clk->ops->disable) {
288 trace_clock_disable(clk->name, 0, smp_processor_id());
289 clk->ops->disable(clk);
290 }
291
292 if (clkdm_control && clk->clkdm)
293 clkdm_clk_disable(clk->clkdm, clk);
294
295 if (clk->parent)
296 omap2_clk_disable(clk->parent);
297}
298
299/**
300 * omap2_clk_enable - request that the system enable a clock
301 * @clk: struct clk * to enable
302 *
303 * Increments the usecount on struct clk @clk. If there were no users
304 * previously, then recurse up the clock tree, enabling all of the
305 * clock's parents and all of the parent clockdomains, and finally,
306 * enabling @clk's clockdomain, and @clk itself. Intended to be
307 * called with the clockfw_lock spinlock held. Returns 0 upon success
308 * or a negative error code upon failure.
309 */
310int omap2_clk_enable(struct clk *clk)
311{
312 int ret;
313
314 pr_debug("clock: %s: incrementing usecount\n", clk->name);
315
316 clk->usecount++;
317
318 if (clk->usecount > 1)
319 return 0;
320
321 pr_debug("clock: %s: enabling in hardware\n", clk->name);
322
323 if (clk->parent) {
324 ret = omap2_clk_enable(clk->parent);
325 if (ret) {
326 WARN(1, "clock: %s: could not enable parent %s: %d\n",
327 clk->name, clk->parent->name, ret);
328 goto oce_err1;
329 }
330 }
331
332 if (clkdm_control && clk->clkdm) {
333 ret = clkdm_clk_enable(clk->clkdm, clk);
334 if (ret) {
335 WARN(1, "clock: %s: could not enable clockdomain %s: "
336 "%d\n", clk->name, clk->clkdm->name, ret);
337 goto oce_err2;
338 }
339 }
340
341 if (clk->ops && clk->ops->enable) {
342 trace_clock_enable(clk->name, 1, smp_processor_id());
343 ret = clk->ops->enable(clk);
344 if (ret) {
345 WARN(1, "clock: %s: could not enable: %d\n",
346 clk->name, ret);
347 goto oce_err3;
348 }
349 }
350
351 return 0;
352
353oce_err3:
354 if (clkdm_control && clk->clkdm)
355 clkdm_clk_disable(clk->clkdm, clk);
356oce_err2:
357 if (clk->parent)
358 omap2_clk_disable(clk->parent);
359oce_err1:
360 clk->usecount--;
361
362 return ret;
363}
364
365/* Given a clock and a rate apply a clock specific rounding function */
366long omap2_clk_round_rate(struct clk *clk, unsigned long rate)
367{
368 if (clk->round_rate)
369 return clk->round_rate(clk, rate);
370
371 return clk->rate;
372}
373
374/* Set the clock rate for a clock source */
375int omap2_clk_set_rate(struct clk *clk, unsigned long rate)
376{
377 int ret = -EINVAL;
378
379 pr_debug("clock: set_rate for clock %s to rate %ld\n", clk->name, rate);
380
381 /* dpll_ck, core_ck, virt_prcm_set; plus all clksel clocks */
382 if (clk->set_rate) {
383 trace_clock_set_rate(clk->name, rate, smp_processor_id());
384 ret = clk->set_rate(clk, rate);
385 }
386
387 return ret;
388}
389
390int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent)
391{
392 if (!clk->clksel)
393 return -EINVAL;
394
395 if (clk->parent == new_parent)
396 return 0;
397
398 return omap2_clksel_set_parent(clk, new_parent);
399}
400
401/* OMAP3/4 non-CORE DPLL clkops */
402
403#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
404
405const struct clkops clkops_omap3_noncore_dpll_ops = {
406 .enable = omap3_noncore_dpll_enable,
407 .disable = omap3_noncore_dpll_disable,
408 .allow_idle = omap3_dpll_allow_idle,
409 .deny_idle = omap3_dpll_deny_idle,
410};
411
412const struct clkops clkops_omap3_core_dpll_ops = {
413 .allow_idle = omap3_dpll_allow_idle,
414 .deny_idle = omap3_dpll_deny_idle,
415};
416
417#endif
418
419/*
420 * OMAP2+ clock reset and init functions
421 */
422
423#ifdef CONFIG_OMAP_RESET_CLOCKS
424void omap2_clk_disable_unused(struct clk *clk)
425{
426 u32 regval32, v;
427
428 v = (clk->flags & INVERT_ENABLE) ? (1 << clk->enable_bit) : 0;
429
430 regval32 = __raw_readl(clk->enable_reg);
431 if ((regval32 & (1 << clk->enable_bit)) == v)
432 return;
433
434 pr_debug("Disabling unused clock \"%s\"\n", clk->name);
435 if (cpu_is_omap34xx()) {
436 omap2_clk_enable(clk);
437 omap2_clk_disable(clk);
438 } else {
439 clk->ops->disable(clk);
440 }
441 if (clk->clkdm != NULL)
442 pwrdm_state_switch(clk->clkdm->pwrdm.ptr);
443}
444#endif
445
446/**
447 * omap2_clk_switch_mpurate_at_boot - switch ARM MPU rate by boot-time argument
448 * @mpurate_ck_name: clk name of the clock to change rate
449 *
450 * Change the ARM MPU clock rate to the rate specified on the command
451 * line, if one was specified. @mpurate_ck_name should be
452 * "virt_prcm_set" on OMAP2xxx and "dpll1_ck" on OMAP34xx/OMAP36xx.
453 * XXX Does not handle voltage scaling - on OMAP2xxx this is currently
454 * handled by the virt_prcm_set clock, but this should be handled by
455 * the OPP layer. XXX This is intended to be handled by the OPP layer
456 * code in the near future and should be removed from the clock code.
457 * Returns -EINVAL if 'mpurate' is zero or if clk_set_rate() rejects
458 * the rate, -ENOENT if the struct clk referred to by @mpurate_ck_name
459 * cannot be found, or 0 upon success.
460 */
461int __init omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name)
462{
463 struct clk *mpurate_ck;
464 int r;
465
466 if (!mpurate)
467 return -EINVAL;
468
469 mpurate_ck = clk_get(NULL, mpurate_ck_name);
470 if (WARN(IS_ERR(mpurate_ck), "Failed to get %s.\n", mpurate_ck_name))
471 return -ENOENT;
472
473 r = clk_set_rate(mpurate_ck, mpurate);
474 if (IS_ERR_VALUE(r)) {
475 WARN(1, "clock: %s: unable to set MPU rate to %d: %d\n",
476 mpurate_ck->name, mpurate, r);
477 clk_put(mpurate_ck);
478 return -EINVAL;
479 }
480
481 calibrate_delay();
482 recalculate_root_clocks();
483
484 clk_put(mpurate_ck);
485
486 return 0;
487}
488
489/**
490 * omap2_clk_print_new_rates - print summary of current clock tree rates
491 * @hfclkin_ck_name: clk name for the off-chip HF oscillator
492 * @core_ck_name: clk name for the on-chip CORE_CLK
493 * @mpu_ck_name: clk name for the ARM MPU clock
494 *
495 * Prints a short message to the console with the HFCLKIN oscillator
496 * rate, the rate of the CORE clock, and the rate of the ARM MPU clock.
497 * Called by the boot-time MPU rate switching code. XXX This is intended
498 * to be handled by the OPP layer code in the near future and should be
499 * removed from the clock code. No return value.
500 */
501void __init omap2_clk_print_new_rates(const char *hfclkin_ck_name,
502 const char *core_ck_name,
503 const char *mpu_ck_name)
504{
505 struct clk *hfclkin_ck, *core_ck, *mpu_ck;
506 unsigned long hfclkin_rate;
507
508 mpu_ck = clk_get(NULL, mpu_ck_name);
509 if (WARN(IS_ERR(mpu_ck), "clock: failed to get %s.\n", mpu_ck_name))
510 return;
511
512 core_ck = clk_get(NULL, core_ck_name);
513 if (WARN(IS_ERR(core_ck), "clock: failed to get %s.\n", core_ck_name))
514 return;
515
516 hfclkin_ck = clk_get(NULL, hfclkin_ck_name);
517 if (WARN(IS_ERR(hfclkin_ck), "Failed to get %s.\n", hfclkin_ck_name))
518 return;
519
520 hfclkin_rate = clk_get_rate(hfclkin_ck);
521
522 pr_info("Switched to new clocking rate (Crystal/Core/MPU): "
523 "%ld.%01ld/%ld/%ld MHz\n",
524 (hfclkin_rate / 1000000),
525 ((hfclkin_rate / 100000) % 10),
526 (clk_get_rate(core_ck) / 1000000),
527 (clk_get_rate(mpu_ck) / 1000000));
528}
529
530/* Common data */
531
532struct clk_functions omap2_clk_functions = {
533 .clk_enable = omap2_clk_enable,
534 .clk_disable = omap2_clk_disable,
535 .clk_round_rate = omap2_clk_round_rate,
536 .clk_set_rate = omap2_clk_set_rate,
537 .clk_set_parent = omap2_clk_set_parent,
538 .clk_disable_unused = omap2_clk_disable_unused,
539};
540
1/*
2 * linux/arch/arm/mach-omap2/clock.c
3 *
4 * Copyright (C) 2005-2008 Texas Instruments, Inc.
5 * Copyright (C) 2004-2010 Nokia Corporation
6 *
7 * Contacts:
8 * Richard Woodruff <r-woodruff2@ti.com>
9 * Paul Walmsley
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15#undef DEBUG
16
17#include <linux/kernel.h>
18#include <linux/export.h>
19#include <linux/list.h>
20#include <linux/errno.h>
21#include <linux/err.h>
22#include <linux/delay.h>
23#include <linux/clk.h>
24#include <linux/clk-provider.h>
25#include <linux/io.h>
26#include <linux/bitops.h>
27#include <linux/of_address.h>
28#include <asm/cpu.h>
29
30#include <trace/events/power.h>
31
32#include "soc.h"
33#include "clockdomain.h"
34#include "clock.h"
35#include "cm.h"
36#include "cm2xxx.h"
37#include "cm3xxx.h"
38#include "cm-regbits-24xx.h"
39#include "cm-regbits-34xx.h"
40#include "common.h"
41
42u16 cpu_mask;
43
44/* DPLL valid Fint frequency band limits - from 34xx TRM Section 4.7.6.2 */
45#define OMAP3430_DPLL_FINT_BAND1_MIN 750000
46#define OMAP3430_DPLL_FINT_BAND1_MAX 2100000
47#define OMAP3430_DPLL_FINT_BAND2_MIN 7500000
48#define OMAP3430_DPLL_FINT_BAND2_MAX 21000000
49
50/*
51 * DPLL valid Fint frequency range for OMAP36xx and OMAP4xxx.
52 * From device data manual section 4.3 "DPLL and DLL Specifications".
53 */
54#define OMAP3PLUS_DPLL_FINT_MIN 32000
55#define OMAP3PLUS_DPLL_FINT_MAX 52000000
56
57static struct ti_clk_ll_ops omap_clk_ll_ops = {
58 .clkdm_clk_enable = clkdm_clk_enable,
59 .clkdm_clk_disable = clkdm_clk_disable,
60 .cm_wait_module_ready = omap_cm_wait_module_ready,
61 .cm_split_idlest_reg = cm_split_idlest_reg,
62};
63
64/**
65 * omap2_clk_setup_ll_ops - setup clock driver low-level ops
66 *
67 * Sets up clock driver low-level platform ops. These are needed
68 * for register accesses and various other misc platform operations.
69 * Returns 0 on success, -EBUSY if low level ops have been registered
70 * already.
71 */
72int __init omap2_clk_setup_ll_ops(void)
73{
74 return ti_clk_setup_ll_ops(&omap_clk_ll_ops);
75}
76
77/*
78 * OMAP2+ specific clock functions
79 */
80
81/* Private functions */
82
83/* Public functions */
84
85/**
86 * omap2_init_clk_clkdm - look up a clockdomain name, store pointer in clk
87 * @clk: OMAP clock struct ptr to use
88 *
89 * Convert a clockdomain name stored in a struct clk 'clk' into a
90 * clockdomain pointer, and save it into the struct clk. Intended to be
91 * called during clk_register(). No return value.
92 */
93void omap2_init_clk_clkdm(struct clk_hw *hw)
94{
95 struct clk_hw_omap *clk = to_clk_hw_omap(hw);
96 struct clockdomain *clkdm;
97 const char *clk_name;
98
99 if (!clk->clkdm_name)
100 return;
101
102 clk_name = __clk_get_name(hw->clk);
103
104 clkdm = clkdm_lookup(clk->clkdm_name);
105 if (clkdm) {
106 pr_debug("clock: associated clk %s to clkdm %s\n",
107 clk_name, clk->clkdm_name);
108 clk->clkdm = clkdm;
109 } else {
110 pr_debug("clock: could not associate clk %s to clkdm %s\n",
111 clk_name, clk->clkdm_name);
112 }
113}
114
115static int __initdata mpurate;
116
117/*
118 * By default we use the rate set by the bootloader.
119 * You can override this with mpurate= cmdline option.
120 */
121static int __init omap_clk_setup(char *str)
122{
123 get_option(&str, &mpurate);
124
125 if (!mpurate)
126 return 1;
127
128 if (mpurate < 1000)
129 mpurate *= 1000000;
130
131 return 1;
132}
133__setup("mpurate=", omap_clk_setup);
134
135/**
136 * omap2_clk_print_new_rates - print summary of current clock tree rates
137 * @hfclkin_ck_name: clk name for the off-chip HF oscillator
138 * @core_ck_name: clk name for the on-chip CORE_CLK
139 * @mpu_ck_name: clk name for the ARM MPU clock
140 *
141 * Prints a short message to the console with the HFCLKIN oscillator
142 * rate, the rate of the CORE clock, and the rate of the ARM MPU clock.
143 * Called by the boot-time MPU rate switching code. XXX This is intended
144 * to be handled by the OPP layer code in the near future and should be
145 * removed from the clock code. No return value.
146 */
147void __init omap2_clk_print_new_rates(const char *hfclkin_ck_name,
148 const char *core_ck_name,
149 const char *mpu_ck_name)
150{
151 struct clk *hfclkin_ck, *core_ck, *mpu_ck;
152 unsigned long hfclkin_rate;
153
154 mpu_ck = clk_get(NULL, mpu_ck_name);
155 if (WARN(IS_ERR(mpu_ck), "clock: failed to get %s.\n", mpu_ck_name))
156 return;
157
158 core_ck = clk_get(NULL, core_ck_name);
159 if (WARN(IS_ERR(core_ck), "clock: failed to get %s.\n", core_ck_name))
160 return;
161
162 hfclkin_ck = clk_get(NULL, hfclkin_ck_name);
163 if (WARN(IS_ERR(hfclkin_ck), "Failed to get %s.\n", hfclkin_ck_name))
164 return;
165
166 hfclkin_rate = clk_get_rate(hfclkin_ck);
167
168 pr_info("Switched to new clocking rate (Crystal/Core/MPU): %ld.%01ld/%ld/%ld MHz\n",
169 (hfclkin_rate / 1000000), ((hfclkin_rate / 100000) % 10),
170 (clk_get_rate(core_ck) / 1000000),
171 (clk_get_rate(mpu_ck) / 1000000));
172}
173
174/**
175 * ti_clk_init_features - init clock features struct for the SoC
176 *
177 * Initializes the clock features struct based on the SoC type.
178 */
179void __init ti_clk_init_features(void)
180{
181 struct ti_clk_features features = { 0 };
182 /* Fint setup for DPLLs */
183 if (cpu_is_omap3430()) {
184 features.fint_min = OMAP3430_DPLL_FINT_BAND1_MIN;
185 features.fint_max = OMAP3430_DPLL_FINT_BAND2_MAX;
186 features.fint_band1_max = OMAP3430_DPLL_FINT_BAND1_MAX;
187 features.fint_band2_min = OMAP3430_DPLL_FINT_BAND2_MIN;
188 } else {
189 features.fint_min = OMAP3PLUS_DPLL_FINT_MIN;
190 features.fint_max = OMAP3PLUS_DPLL_FINT_MAX;
191 }
192
193 /* Bypass value setup for DPLLs */
194 if (cpu_is_omap24xx()) {
195 features.dpll_bypass_vals |=
196 (1 << OMAP2XXX_EN_DPLL_LPBYPASS) |
197 (1 << OMAP2XXX_EN_DPLL_FRBYPASS);
198 } else if (cpu_is_omap34xx()) {
199 features.dpll_bypass_vals |=
200 (1 << OMAP3XXX_EN_DPLL_LPBYPASS) |
201 (1 << OMAP3XXX_EN_DPLL_FRBYPASS);
202 } else if (soc_is_am33xx() || cpu_is_omap44xx() || soc_is_am43xx() ||
203 soc_is_omap54xx() || soc_is_dra7xx()) {
204 features.dpll_bypass_vals |=
205 (1 << OMAP4XXX_EN_DPLL_LPBYPASS) |
206 (1 << OMAP4XXX_EN_DPLL_FRBYPASS) |
207 (1 << OMAP4XXX_EN_DPLL_MNBYPASS);
208 }
209
210 /* Jitter correction only available on OMAP343X */
211 if (cpu_is_omap343x())
212 features.flags |= TI_CLK_DPLL_HAS_FREQSEL;
213
214 /* Idlest value for interface clocks.
215 * 24xx uses 0 to indicate not ready, and 1 to indicate ready.
216 * 34xx reverses this, just to keep us on our toes
217 * AM35xx uses both, depending on the module.
218 */
219 if (cpu_is_omap24xx())
220 features.cm_idlest_val = OMAP24XX_CM_IDLEST_VAL;
221 else if (cpu_is_omap34xx())
222 features.cm_idlest_val = OMAP34XX_CM_IDLEST_VAL;
223
224 /* On OMAP3430 ES1.0, DPLL4 can't be re-programmed */
225 if (omap_rev() == OMAP3430_REV_ES1_0)
226 features.flags |= TI_CLK_DPLL4_DENY_REPROGRAM;
227
228 /* Errata I810 for omap5 / dra7 */
229 if (soc_is_omap54xx() || soc_is_dra7xx())
230 features.flags |= TI_CLK_ERRATA_I810;
231
232 ti_clk_setup_features(&features);
233}