1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2013, 2018, The Linux Foundation. All rights reserved.
6 #include <linux/kernel.h>
7 #include <linux/bitops.h>
10 #include <linux/export.h>
11 #include <linux/clk-provider.h>
12 #include <linux/delay.h>
13 #include <linux/rational.h>
14 #include <linux/regmap.h>
15 #include <linux/math64.h>
16 #include <linux/slab.h>
18 #include <asm/div64.h>
24 #define CMD_UPDATE BIT(0)
25 #define CMD_ROOT_EN BIT(1)
26 #define CMD_DIRTY_CFG BIT(4)
27 #define CMD_DIRTY_N BIT(5)
28 #define CMD_DIRTY_M BIT(6)
29 #define CMD_DIRTY_D BIT(7)
30 #define CMD_ROOT_OFF BIT(31)
33 #define CFG_SRC_DIV_SHIFT 0
34 #define CFG_SRC_SEL_SHIFT 8
35 #define CFG_SRC_SEL_MASK (0x7 << CFG_SRC_SEL_SHIFT)
36 #define CFG_MODE_SHIFT 12
37 #define CFG_MODE_MASK (0x3 << CFG_MODE_SHIFT)
38 #define CFG_MODE_DUAL_EDGE (0x2 << CFG_MODE_SHIFT)
39 #define CFG_HW_CLK_CTRL_MASK BIT(20)
45 #define RCG_CFG_OFFSET(rcg) ((rcg)->cmd_rcgr + (rcg)->cfg_off + CFG_REG)
46 #define RCG_M_OFFSET(rcg) ((rcg)->cmd_rcgr + (rcg)->cfg_off + M_REG)
47 #define RCG_N_OFFSET(rcg) ((rcg)->cmd_rcgr + (rcg)->cfg_off + N_REG)
48 #define RCG_D_OFFSET(rcg) ((rcg)->cmd_rcgr + (rcg)->cfg_off + D_REG)
50 /* Dynamic Frequency Scaling */
51 #define MAX_PERF_LEVEL 8
52 #define SE_CMD_DFSR_OFFSET 0x14
53 #define SE_CMD_DFS_EN BIT(0)
54 #define SE_PERF_DFSR(level) (0x1c + 0x4 * (level))
55 #define SE_PERF_M_DFSR(level) (0x5c + 0x4 * (level))
56 #define SE_PERF_N_DFSR(level) (0x9c + 0x4 * (level))
63 static int clk_rcg2_is_enabled(struct clk_hw *hw)
65 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
69 ret = regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CMD_REG, &cmd);
73 return (cmd & CMD_ROOT_OFF) == 0;
76 static u8 clk_rcg2_get_parent(struct clk_hw *hw)
78 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
79 int num_parents = clk_hw_get_num_parents(hw);
83 ret = regmap_read(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg), &cfg);
87 cfg &= CFG_SRC_SEL_MASK;
88 cfg >>= CFG_SRC_SEL_SHIFT;
90 for (i = 0; i < num_parents; i++)
91 if (cfg == rcg->parent_map[i].cfg)
95 pr_debug("%s: Clock %s has invalid parent, using default.\n",
96 __func__, clk_hw_get_name(hw));
100 static int update_config(struct clk_rcg2 *rcg)
104 struct clk_hw *hw = &rcg->clkr.hw;
105 const char *name = clk_hw_get_name(hw);
107 ret = regmap_update_bits(rcg->clkr.regmap, rcg->cmd_rcgr + CMD_REG,
108 CMD_UPDATE, CMD_UPDATE);
112 /* Wait for update to take effect */
113 for (count = 500; count > 0; count--) {
114 ret = regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CMD_REG, &cmd);
117 if (!(cmd & CMD_UPDATE))
122 WARN(1, "%s: rcg didn't update its configuration.", name);
126 static int clk_rcg2_set_parent(struct clk_hw *hw, u8 index)
128 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
130 u32 cfg = rcg->parent_map[index].cfg << CFG_SRC_SEL_SHIFT;
132 ret = regmap_update_bits(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg),
133 CFG_SRC_SEL_MASK, cfg);
137 return update_config(rcg);
141 * Calculate m/n:d rate
144 * rate = ----------- x ---
148 calc_rate(unsigned long rate, u32 m, u32 n, u32 mode, u32 hid_div)
166 clk_rcg2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
168 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
169 u32 cfg, hid_div, m = 0, n = 0, mode = 0, mask;
171 regmap_read(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg), &cfg);
173 if (rcg->mnd_width) {
174 mask = BIT(rcg->mnd_width) - 1;
175 regmap_read(rcg->clkr.regmap, RCG_M_OFFSET(rcg), &m);
177 regmap_read(rcg->clkr.regmap, RCG_N_OFFSET(rcg), &n);
181 mode = cfg & CFG_MODE_MASK;
182 mode >>= CFG_MODE_SHIFT;
185 mask = BIT(rcg->hid_width) - 1;
186 hid_div = cfg >> CFG_SRC_DIV_SHIFT;
189 return calc_rate(parent_rate, m, n, mode, hid_div);
192 static int _freq_tbl_determine_rate(struct clk_hw *hw, const struct freq_tbl *f,
193 struct clk_rate_request *req,
194 enum freq_policy policy)
196 unsigned long clk_flags, rate = req->rate;
198 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
203 f = qcom_find_freq_floor(f, rate);
206 f = qcom_find_freq(f, rate);
215 index = qcom_find_src_index(hw, rcg->parent_map, f->src);
219 clk_flags = clk_hw_get_flags(hw);
220 p = clk_hw_get_parent_by_index(hw, index);
224 if (clk_flags & CLK_SET_RATE_PARENT) {
230 rate *= f->pre_div + 1;
240 rate = clk_hw_get_rate(p);
242 req->best_parent_hw = p;
243 req->best_parent_rate = rate;
249 static int clk_rcg2_determine_rate(struct clk_hw *hw,
250 struct clk_rate_request *req)
252 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
254 return _freq_tbl_determine_rate(hw, rcg->freq_tbl, req, CEIL);
257 static int clk_rcg2_determine_floor_rate(struct clk_hw *hw,
258 struct clk_rate_request *req)
260 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
262 return _freq_tbl_determine_rate(hw, rcg->freq_tbl, req, FLOOR);
265 static int __clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f)
267 u32 cfg, mask, d_val, not2d_val, n_minus_m;
268 struct clk_hw *hw = &rcg->clkr.hw;
269 int ret, index = qcom_find_src_index(hw, rcg->parent_map, f->src);
274 if (rcg->mnd_width && f->n) {
275 mask = BIT(rcg->mnd_width) - 1;
276 ret = regmap_update_bits(rcg->clkr.regmap,
277 RCG_M_OFFSET(rcg), mask, f->m);
281 ret = regmap_update_bits(rcg->clkr.regmap,
282 RCG_N_OFFSET(rcg), mask, ~(f->n - f->m));
286 /* Calculate 2d value */
289 n_minus_m = f->n - f->m;
292 d_val = clamp_t(u32, d_val, f->m, n_minus_m);
293 not2d_val = ~d_val & mask;
295 ret = regmap_update_bits(rcg->clkr.regmap,
296 RCG_D_OFFSET(rcg), mask, not2d_val);
301 mask = BIT(rcg->hid_width) - 1;
302 mask |= CFG_SRC_SEL_MASK | CFG_MODE_MASK | CFG_HW_CLK_CTRL_MASK;
303 cfg = f->pre_div << CFG_SRC_DIV_SHIFT;
304 cfg |= rcg->parent_map[index].cfg << CFG_SRC_SEL_SHIFT;
305 if (rcg->mnd_width && f->n && (f->m != f->n))
306 cfg |= CFG_MODE_DUAL_EDGE;
307 return regmap_update_bits(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg),
311 static int clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f)
315 ret = __clk_rcg2_configure(rcg, f);
319 return update_config(rcg);
322 static int __clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate,
323 enum freq_policy policy)
325 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
326 const struct freq_tbl *f;
330 f = qcom_find_freq_floor(rcg->freq_tbl, rate);
333 f = qcom_find_freq(rcg->freq_tbl, rate);
342 return clk_rcg2_configure(rcg, f);
345 static int clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate,
346 unsigned long parent_rate)
348 return __clk_rcg2_set_rate(hw, rate, CEIL);
351 static int clk_rcg2_set_floor_rate(struct clk_hw *hw, unsigned long rate,
352 unsigned long parent_rate)
354 return __clk_rcg2_set_rate(hw, rate, FLOOR);
357 static int clk_rcg2_set_rate_and_parent(struct clk_hw *hw,
358 unsigned long rate, unsigned long parent_rate, u8 index)
360 return __clk_rcg2_set_rate(hw, rate, CEIL);
363 static int clk_rcg2_set_floor_rate_and_parent(struct clk_hw *hw,
364 unsigned long rate, unsigned long parent_rate, u8 index)
366 return __clk_rcg2_set_rate(hw, rate, FLOOR);
369 const struct clk_ops clk_rcg2_ops = {
370 .is_enabled = clk_rcg2_is_enabled,
371 .get_parent = clk_rcg2_get_parent,
372 .set_parent = clk_rcg2_set_parent,
373 .recalc_rate = clk_rcg2_recalc_rate,
374 .determine_rate = clk_rcg2_determine_rate,
375 .set_rate = clk_rcg2_set_rate,
376 .set_rate_and_parent = clk_rcg2_set_rate_and_parent,
378 EXPORT_SYMBOL_GPL(clk_rcg2_ops);
380 const struct clk_ops clk_rcg2_floor_ops = {
381 .is_enabled = clk_rcg2_is_enabled,
382 .get_parent = clk_rcg2_get_parent,
383 .set_parent = clk_rcg2_set_parent,
384 .recalc_rate = clk_rcg2_recalc_rate,
385 .determine_rate = clk_rcg2_determine_floor_rate,
386 .set_rate = clk_rcg2_set_floor_rate,
387 .set_rate_and_parent = clk_rcg2_set_floor_rate_and_parent,
389 EXPORT_SYMBOL_GPL(clk_rcg2_floor_ops);
396 static const struct frac_entry frac_table_675m[] = { /* link rate of 270M */
397 { 52, 295 }, /* 119 M */
398 { 11, 57 }, /* 130.25 M */
399 { 63, 307 }, /* 138.50 M */
400 { 11, 50 }, /* 148.50 M */
401 { 47, 206 }, /* 154 M */
402 { 31, 100 }, /* 205.25 M */
403 { 107, 269 }, /* 268.50 M */
407 static struct frac_entry frac_table_810m[] = { /* Link rate of 162M */
408 { 31, 211 }, /* 119 M */
409 { 32, 199 }, /* 130.25 M */
410 { 63, 307 }, /* 138.50 M */
411 { 11, 60 }, /* 148.50 M */
412 { 50, 263 }, /* 154 M */
413 { 31, 120 }, /* 205.25 M */
414 { 119, 359 }, /* 268.50 M */
418 static int clk_edp_pixel_set_rate(struct clk_hw *hw, unsigned long rate,
419 unsigned long parent_rate)
421 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
422 struct freq_tbl f = *rcg->freq_tbl;
423 const struct frac_entry *frac;
425 s64 src_rate = parent_rate;
427 u32 mask = BIT(rcg->hid_width) - 1;
430 if (src_rate == 810000000)
431 frac = frac_table_810m;
433 frac = frac_table_675m;
435 for (; frac->num; frac++) {
437 request *= frac->den;
438 request = div_s64(request, frac->num);
439 if ((src_rate < (request - delta)) ||
440 (src_rate > (request + delta)))
443 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,
446 f.pre_div >>= CFG_SRC_DIV_SHIFT;
451 return clk_rcg2_configure(rcg, &f);
457 static int clk_edp_pixel_set_rate_and_parent(struct clk_hw *hw,
458 unsigned long rate, unsigned long parent_rate, u8 index)
460 /* Parent index is set statically in frequency table */
461 return clk_edp_pixel_set_rate(hw, rate, parent_rate);
464 static int clk_edp_pixel_determine_rate(struct clk_hw *hw,
465 struct clk_rate_request *req)
467 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
468 const struct freq_tbl *f = rcg->freq_tbl;
469 const struct frac_entry *frac;
472 u32 mask = BIT(rcg->hid_width) - 1;
474 int index = qcom_find_src_index(hw, rcg->parent_map, f->src);
476 /* Force the correct parent */
477 req->best_parent_hw = clk_hw_get_parent_by_index(hw, index);
478 req->best_parent_rate = clk_hw_get_rate(req->best_parent_hw);
480 if (req->best_parent_rate == 810000000)
481 frac = frac_table_810m;
483 frac = frac_table_675m;
485 for (; frac->num; frac++) {
487 request *= frac->den;
488 request = div_s64(request, frac->num);
489 if ((req->best_parent_rate < (request - delta)) ||
490 (req->best_parent_rate > (request + delta)))
493 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,
495 hid_div >>= CFG_SRC_DIV_SHIFT;
498 req->rate = calc_rate(req->best_parent_rate,
499 frac->num, frac->den,
500 !!frac->den, hid_div);
507 const struct clk_ops clk_edp_pixel_ops = {
508 .is_enabled = clk_rcg2_is_enabled,
509 .get_parent = clk_rcg2_get_parent,
510 .set_parent = clk_rcg2_set_parent,
511 .recalc_rate = clk_rcg2_recalc_rate,
512 .set_rate = clk_edp_pixel_set_rate,
513 .set_rate_and_parent = clk_edp_pixel_set_rate_and_parent,
514 .determine_rate = clk_edp_pixel_determine_rate,
516 EXPORT_SYMBOL_GPL(clk_edp_pixel_ops);
518 static int clk_byte_determine_rate(struct clk_hw *hw,
519 struct clk_rate_request *req)
521 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
522 const struct freq_tbl *f = rcg->freq_tbl;
523 int index = qcom_find_src_index(hw, rcg->parent_map, f->src);
524 unsigned long parent_rate, div;
525 u32 mask = BIT(rcg->hid_width) - 1;
531 req->best_parent_hw = p = clk_hw_get_parent_by_index(hw, index);
532 req->best_parent_rate = parent_rate = clk_hw_round_rate(p, req->rate);
534 div = DIV_ROUND_UP((2 * parent_rate), req->rate) - 1;
535 div = min_t(u32, div, mask);
537 req->rate = calc_rate(parent_rate, 0, 0, 0, div);
542 static int clk_byte_set_rate(struct clk_hw *hw, unsigned long rate,
543 unsigned long parent_rate)
545 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
546 struct freq_tbl f = *rcg->freq_tbl;
548 u32 mask = BIT(rcg->hid_width) - 1;
550 div = DIV_ROUND_UP((2 * parent_rate), rate) - 1;
551 div = min_t(u32, div, mask);
555 return clk_rcg2_configure(rcg, &f);
558 static int clk_byte_set_rate_and_parent(struct clk_hw *hw,
559 unsigned long rate, unsigned long parent_rate, u8 index)
561 /* Parent index is set statically in frequency table */
562 return clk_byte_set_rate(hw, rate, parent_rate);
565 const struct clk_ops clk_byte_ops = {
566 .is_enabled = clk_rcg2_is_enabled,
567 .get_parent = clk_rcg2_get_parent,
568 .set_parent = clk_rcg2_set_parent,
569 .recalc_rate = clk_rcg2_recalc_rate,
570 .set_rate = clk_byte_set_rate,
571 .set_rate_and_parent = clk_byte_set_rate_and_parent,
572 .determine_rate = clk_byte_determine_rate,
574 EXPORT_SYMBOL_GPL(clk_byte_ops);
576 static int clk_byte2_determine_rate(struct clk_hw *hw,
577 struct clk_rate_request *req)
579 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
580 unsigned long parent_rate, div;
581 u32 mask = BIT(rcg->hid_width) - 1;
583 unsigned long rate = req->rate;
588 p = req->best_parent_hw;
589 req->best_parent_rate = parent_rate = clk_hw_round_rate(p, rate);
591 div = DIV_ROUND_UP((2 * parent_rate), rate) - 1;
592 div = min_t(u32, div, mask);
594 req->rate = calc_rate(parent_rate, 0, 0, 0, div);
599 static int clk_byte2_set_rate(struct clk_hw *hw, unsigned long rate,
600 unsigned long parent_rate)
602 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
603 struct freq_tbl f = { 0 };
605 int i, num_parents = clk_hw_get_num_parents(hw);
606 u32 mask = BIT(rcg->hid_width) - 1;
609 div = DIV_ROUND_UP((2 * parent_rate), rate) - 1;
610 div = min_t(u32, div, mask);
614 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG, &cfg);
615 cfg &= CFG_SRC_SEL_MASK;
616 cfg >>= CFG_SRC_SEL_SHIFT;
618 for (i = 0; i < num_parents; i++) {
619 if (cfg == rcg->parent_map[i].cfg) {
620 f.src = rcg->parent_map[i].src;
621 return clk_rcg2_configure(rcg, &f);
628 static int clk_byte2_set_rate_and_parent(struct clk_hw *hw,
629 unsigned long rate, unsigned long parent_rate, u8 index)
631 /* Read the hardware to determine parent during set_rate */
632 return clk_byte2_set_rate(hw, rate, parent_rate);
635 const struct clk_ops clk_byte2_ops = {
636 .is_enabled = clk_rcg2_is_enabled,
637 .get_parent = clk_rcg2_get_parent,
638 .set_parent = clk_rcg2_set_parent,
639 .recalc_rate = clk_rcg2_recalc_rate,
640 .set_rate = clk_byte2_set_rate,
641 .set_rate_and_parent = clk_byte2_set_rate_and_parent,
642 .determine_rate = clk_byte2_determine_rate,
644 EXPORT_SYMBOL_GPL(clk_byte2_ops);
646 static const struct frac_entry frac_table_pixel[] = {
655 static int clk_pixel_determine_rate(struct clk_hw *hw,
656 struct clk_rate_request *req)
658 unsigned long request, src_rate;
660 const struct frac_entry *frac = frac_table_pixel;
662 for (; frac->num; frac++) {
663 request = (req->rate * frac->den) / frac->num;
665 src_rate = clk_hw_round_rate(req->best_parent_hw, request);
666 if ((src_rate < (request - delta)) ||
667 (src_rate > (request + delta)))
670 req->best_parent_rate = src_rate;
671 req->rate = (src_rate * frac->num) / frac->den;
678 static int clk_pixel_set_rate(struct clk_hw *hw, unsigned long rate,
679 unsigned long parent_rate)
681 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
682 struct freq_tbl f = { 0 };
683 const struct frac_entry *frac = frac_table_pixel;
684 unsigned long request;
686 u32 mask = BIT(rcg->hid_width) - 1;
688 int i, num_parents = clk_hw_get_num_parents(hw);
690 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG, &cfg);
691 cfg &= CFG_SRC_SEL_MASK;
692 cfg >>= CFG_SRC_SEL_SHIFT;
694 for (i = 0; i < num_parents; i++)
695 if (cfg == rcg->parent_map[i].cfg) {
696 f.src = rcg->parent_map[i].src;
700 for (; frac->num; frac++) {
701 request = (rate * frac->den) / frac->num;
703 if ((parent_rate < (request - delta)) ||
704 (parent_rate > (request + delta)))
707 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,
710 f.pre_div >>= CFG_SRC_DIV_SHIFT;
715 return clk_rcg2_configure(rcg, &f);
720 static int clk_pixel_set_rate_and_parent(struct clk_hw *hw, unsigned long rate,
721 unsigned long parent_rate, u8 index)
723 return clk_pixel_set_rate(hw, rate, parent_rate);
726 const struct clk_ops clk_pixel_ops = {
727 .is_enabled = clk_rcg2_is_enabled,
728 .get_parent = clk_rcg2_get_parent,
729 .set_parent = clk_rcg2_set_parent,
730 .recalc_rate = clk_rcg2_recalc_rate,
731 .set_rate = clk_pixel_set_rate,
732 .set_rate_and_parent = clk_pixel_set_rate_and_parent,
733 .determine_rate = clk_pixel_determine_rate,
735 EXPORT_SYMBOL_GPL(clk_pixel_ops);
737 static int clk_gfx3d_determine_rate(struct clk_hw *hw,
738 struct clk_rate_request *req)
740 struct clk_rate_request parent_req = { };
741 struct clk_hw *p2, *p8, *p9, *xo;
742 unsigned long p9_rate;
745 xo = clk_hw_get_parent_by_index(hw, 0);
746 if (req->rate == clk_hw_get_rate(xo)) {
747 req->best_parent_hw = xo;
751 p9 = clk_hw_get_parent_by_index(hw, 2);
752 p2 = clk_hw_get_parent_by_index(hw, 3);
753 p8 = clk_hw_get_parent_by_index(hw, 4);
755 /* PLL9 is a fixed rate PLL */
756 p9_rate = clk_hw_get_rate(p9);
758 parent_req.rate = req->rate = min(req->rate, p9_rate);
759 if (req->rate == p9_rate) {
760 req->rate = req->best_parent_rate = p9_rate;
761 req->best_parent_hw = p9;
765 if (req->best_parent_hw == p9) {
766 /* Are we going back to a previously used rate? */
767 if (clk_hw_get_rate(p8) == req->rate)
768 req->best_parent_hw = p8;
770 req->best_parent_hw = p2;
771 } else if (req->best_parent_hw == p8) {
772 req->best_parent_hw = p2;
774 req->best_parent_hw = p8;
777 ret = __clk_determine_rate(req->best_parent_hw, &parent_req);
781 req->rate = req->best_parent_rate = parent_req.rate;
786 static int clk_gfx3d_set_rate_and_parent(struct clk_hw *hw, unsigned long rate,
787 unsigned long parent_rate, u8 index)
789 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
793 /* Just mux it, we don't use the division or m/n hardware */
794 cfg = rcg->parent_map[index].cfg << CFG_SRC_SEL_SHIFT;
795 ret = regmap_write(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG, cfg);
799 return update_config(rcg);
802 static int clk_gfx3d_set_rate(struct clk_hw *hw, unsigned long rate,
803 unsigned long parent_rate)
806 * We should never get here; clk_gfx3d_determine_rate() should always
807 * make us use a different parent than what we're currently using, so
808 * clk_gfx3d_set_rate_and_parent() should always be called.
813 const struct clk_ops clk_gfx3d_ops = {
814 .is_enabled = clk_rcg2_is_enabled,
815 .get_parent = clk_rcg2_get_parent,
816 .set_parent = clk_rcg2_set_parent,
817 .recalc_rate = clk_rcg2_recalc_rate,
818 .set_rate = clk_gfx3d_set_rate,
819 .set_rate_and_parent = clk_gfx3d_set_rate_and_parent,
820 .determine_rate = clk_gfx3d_determine_rate,
822 EXPORT_SYMBOL_GPL(clk_gfx3d_ops);
824 static int clk_rcg2_set_force_enable(struct clk_hw *hw)
826 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
827 const char *name = clk_hw_get_name(hw);
830 ret = regmap_update_bits(rcg->clkr.regmap, rcg->cmd_rcgr + CMD_REG,
831 CMD_ROOT_EN, CMD_ROOT_EN);
835 /* wait for RCG to turn ON */
836 for (count = 500; count > 0; count--) {
837 if (clk_rcg2_is_enabled(hw))
843 pr_err("%s: RCG did not turn on\n", name);
847 static int clk_rcg2_clear_force_enable(struct clk_hw *hw)
849 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
851 return regmap_update_bits(rcg->clkr.regmap, rcg->cmd_rcgr + CMD_REG,
856 clk_rcg2_shared_force_enable_clear(struct clk_hw *hw, const struct freq_tbl *f)
858 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
861 ret = clk_rcg2_set_force_enable(hw);
865 ret = clk_rcg2_configure(rcg, f);
869 return clk_rcg2_clear_force_enable(hw);
872 static int clk_rcg2_shared_set_rate(struct clk_hw *hw, unsigned long rate,
873 unsigned long parent_rate)
875 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
876 const struct freq_tbl *f;
878 f = qcom_find_freq(rcg->freq_tbl, rate);
883 * In case clock is disabled, update the CFG, M, N and D registers
884 * and don't hit the update bit of CMD register.
886 if (!__clk_is_enabled(hw->clk))
887 return __clk_rcg2_configure(rcg, f);
889 return clk_rcg2_shared_force_enable_clear(hw, f);
892 static int clk_rcg2_shared_set_rate_and_parent(struct clk_hw *hw,
893 unsigned long rate, unsigned long parent_rate, u8 index)
895 return clk_rcg2_shared_set_rate(hw, rate, parent_rate);
898 static int clk_rcg2_shared_enable(struct clk_hw *hw)
900 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
904 * Set the update bit because required configuration has already
905 * been written in clk_rcg2_shared_set_rate()
907 ret = clk_rcg2_set_force_enable(hw);
911 ret = update_config(rcg);
915 return clk_rcg2_clear_force_enable(hw);
918 static void clk_rcg2_shared_disable(struct clk_hw *hw)
920 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
924 * Store current configuration as switching to safe source would clear
925 * the SRC and DIV of CFG register
927 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG, &cfg);
930 * Park the RCG at a safe configuration - sourced off of safe source.
931 * Force enable and disable the RCG while configuring it to safeguard
932 * against any update signal coming from the downstream clock.
933 * The current parent is still prepared and enabled at this point, and
934 * the safe source is always on while application processor subsystem
935 * is online. Therefore, the RCG can safely switch its parent.
937 clk_rcg2_set_force_enable(hw);
939 regmap_write(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,
940 rcg->safe_src_index << CFG_SRC_SEL_SHIFT);
944 clk_rcg2_clear_force_enable(hw);
946 /* Write back the stored configuration corresponding to current rate */
947 regmap_write(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG, cfg);
950 const struct clk_ops clk_rcg2_shared_ops = {
951 .enable = clk_rcg2_shared_enable,
952 .disable = clk_rcg2_shared_disable,
953 .get_parent = clk_rcg2_get_parent,
954 .set_parent = clk_rcg2_set_parent,
955 .recalc_rate = clk_rcg2_recalc_rate,
956 .determine_rate = clk_rcg2_determine_rate,
957 .set_rate = clk_rcg2_shared_set_rate,
958 .set_rate_and_parent = clk_rcg2_shared_set_rate_and_parent,
960 EXPORT_SYMBOL_GPL(clk_rcg2_shared_ops);
962 /* Common APIs to be used for DFS based RCGR */
963 static void clk_rcg2_dfs_populate_freq(struct clk_hw *hw, unsigned int l,
966 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
968 unsigned long prate = 0;
969 u32 val, mask, cfg, mode, src;
972 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + SE_PERF_DFSR(l), &cfg);
974 mask = BIT(rcg->hid_width) - 1;
977 f->pre_div = cfg & mask;
979 src = cfg & CFG_SRC_SEL_MASK;
980 src >>= CFG_SRC_SEL_SHIFT;
982 num_parents = clk_hw_get_num_parents(hw);
983 for (i = 0; i < num_parents; i++) {
984 if (src == rcg->parent_map[i].cfg) {
985 f->src = rcg->parent_map[i].src;
986 p = clk_hw_get_parent_by_index(&rcg->clkr.hw, i);
987 prate = clk_hw_get_rate(p);
991 mode = cfg & CFG_MODE_MASK;
992 mode >>= CFG_MODE_SHIFT;
994 mask = BIT(rcg->mnd_width) - 1;
995 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + SE_PERF_M_DFSR(l),
1000 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + SE_PERF_N_DFSR(l),
1008 f->freq = calc_rate(prate, f->m, f->n, mode, f->pre_div);
1011 static int clk_rcg2_dfs_populate_freq_table(struct clk_rcg2 *rcg)
1013 struct freq_tbl *freq_tbl;
1016 /* Allocate space for 1 extra since table is NULL terminated */
1017 freq_tbl = kcalloc(MAX_PERF_LEVEL + 1, sizeof(*freq_tbl), GFP_KERNEL);
1020 rcg->freq_tbl = freq_tbl;
1022 for (i = 0; i < MAX_PERF_LEVEL; i++)
1023 clk_rcg2_dfs_populate_freq(&rcg->clkr.hw, i, freq_tbl + i);
1028 static int clk_rcg2_dfs_determine_rate(struct clk_hw *hw,
1029 struct clk_rate_request *req)
1031 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
1034 if (!rcg->freq_tbl) {
1035 ret = clk_rcg2_dfs_populate_freq_table(rcg);
1037 pr_err("Failed to update DFS tables for %s\n",
1038 clk_hw_get_name(hw));
1043 return clk_rcg2_determine_rate(hw, req);
1046 static unsigned long
1047 clk_rcg2_dfs_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
1049 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
1050 u32 level, mask, cfg, m = 0, n = 0, mode, pre_div;
1052 regmap_read(rcg->clkr.regmap,
1053 rcg->cmd_rcgr + SE_CMD_DFSR_OFFSET, &level);
1054 level &= GENMASK(4, 1);
1058 return rcg->freq_tbl[level].freq;
1061 * Assume that parent_rate is actually the parent because
1062 * we can't do any better at figuring it out when the table
1063 * hasn't been populated yet. We only populate the table
1064 * in determine_rate because we can't guarantee the parents
1065 * will be registered with the framework until then.
1067 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + SE_PERF_DFSR(level),
1070 mask = BIT(rcg->hid_width) - 1;
1073 pre_div = cfg & mask;
1075 mode = cfg & CFG_MODE_MASK;
1076 mode >>= CFG_MODE_SHIFT;
1078 mask = BIT(rcg->mnd_width) - 1;
1079 regmap_read(rcg->clkr.regmap,
1080 rcg->cmd_rcgr + SE_PERF_M_DFSR(level), &m);
1083 regmap_read(rcg->clkr.regmap,
1084 rcg->cmd_rcgr + SE_PERF_N_DFSR(level), &n);
1090 return calc_rate(parent_rate, m, n, mode, pre_div);
1093 static const struct clk_ops clk_rcg2_dfs_ops = {
1094 .is_enabled = clk_rcg2_is_enabled,
1095 .get_parent = clk_rcg2_get_parent,
1096 .determine_rate = clk_rcg2_dfs_determine_rate,
1097 .recalc_rate = clk_rcg2_dfs_recalc_rate,
1100 static int clk_rcg2_enable_dfs(const struct clk_rcg_dfs_data *data,
1101 struct regmap *regmap)
1103 struct clk_rcg2 *rcg = data->rcg;
1104 struct clk_init_data *init = data->init;
1108 ret = regmap_read(regmap, rcg->cmd_rcgr + SE_CMD_DFSR_OFFSET, &val);
1112 if (!(val & SE_CMD_DFS_EN))
1116 * Rate changes with consumer writing a register in
1117 * their own I/O region
1119 init->flags |= CLK_GET_RATE_NOCACHE;
1120 init->ops = &clk_rcg2_dfs_ops;
1122 rcg->freq_tbl = NULL;
1127 int qcom_cc_register_rcg_dfs(struct regmap *regmap,
1128 const struct clk_rcg_dfs_data *rcgs, size_t len)
1132 for (i = 0; i < len; i++) {
1133 ret = clk_rcg2_enable_dfs(&rcgs[i], regmap);
1140 EXPORT_SYMBOL_GPL(qcom_cc_register_rcg_dfs);
1142 static int clk_rcg2_dp_set_rate(struct clk_hw *hw, unsigned long rate,
1143 unsigned long parent_rate)
1145 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
1146 struct freq_tbl f = { 0 };
1147 u32 mask = BIT(rcg->hid_width) - 1;
1149 int i, num_parents = clk_hw_get_num_parents(hw);
1150 unsigned long num, den;
1152 rational_best_approximation(parent_rate, rate,
1153 GENMASK(rcg->mnd_width - 1, 0),
1154 GENMASK(rcg->mnd_width - 1, 0), &den, &num);
1159 regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG, &cfg);
1161 cfg &= CFG_SRC_SEL_MASK;
1162 cfg >>= CFG_SRC_SEL_SHIFT;
1164 for (i = 0; i < num_parents; i++) {
1165 if (cfg == rcg->parent_map[i].cfg) {
1166 f.src = rcg->parent_map[i].src;
1171 f.pre_div = hid_div;
1172 f.pre_div >>= CFG_SRC_DIV_SHIFT;
1183 return clk_rcg2_configure(rcg, &f);
1186 static int clk_rcg2_dp_set_rate_and_parent(struct clk_hw *hw,
1187 unsigned long rate, unsigned long parent_rate, u8 index)
1189 return clk_rcg2_dp_set_rate(hw, rate, parent_rate);
1192 static int clk_rcg2_dp_determine_rate(struct clk_hw *hw,
1193 struct clk_rate_request *req)
1195 struct clk_rcg2 *rcg = to_clk_rcg2(hw);
1196 unsigned long num, den;
1199 /* Parent rate is a fixed phy link rate */
1200 rational_best_approximation(req->best_parent_rate, req->rate,
1201 GENMASK(rcg->mnd_width - 1, 0),
1202 GENMASK(rcg->mnd_width - 1, 0), &den, &num);
1207 tmp = req->best_parent_rate * num;
1214 const struct clk_ops clk_dp_ops = {
1215 .is_enabled = clk_rcg2_is_enabled,
1216 .get_parent = clk_rcg2_get_parent,
1217 .set_parent = clk_rcg2_set_parent,
1218 .recalc_rate = clk_rcg2_recalc_rate,
1219 .set_rate = clk_rcg2_dp_set_rate,
1220 .set_rate_and_parent = clk_rcg2_dp_set_rate_and_parent,
1221 .determine_rate = clk_rcg2_dp_determine_rate,
1223 EXPORT_SYMBOL_GPL(clk_dp_ops);