1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2015, 2018, The Linux Foundation. All rights reserved.
6 #include <linux/kernel.h>
7 #include <linux/export.h>
8 #include <linux/clk-provider.h>
9 #include <linux/regmap.h>
10 #include <linux/delay.h>
12 #include "clk-alpha-pll.h"
15 #define PLL_MODE(p) ((p)->offset + 0x0)
16 # define PLL_OUTCTRL BIT(0)
17 # define PLL_BYPASSNL BIT(1)
18 # define PLL_RESET_N BIT(2)
19 # define PLL_OFFLINE_REQ BIT(7)
20 # define PLL_LOCK_COUNT_SHIFT 8
21 # define PLL_LOCK_COUNT_MASK 0x3f
22 # define PLL_BIAS_COUNT_SHIFT 14
23 # define PLL_BIAS_COUNT_MASK 0x3f
24 # define PLL_VOTE_FSM_ENA BIT(20)
25 # define PLL_FSM_ENA BIT(20)
26 # define PLL_VOTE_FSM_RESET BIT(21)
27 # define PLL_UPDATE BIT(22)
28 # define PLL_UPDATE_BYPASS BIT(23)
29 # define PLL_OFFLINE_ACK BIT(28)
30 # define ALPHA_PLL_ACK_LATCH BIT(29)
31 # define PLL_ACTIVE_FLAG BIT(30)
32 # define PLL_LOCK_DET BIT(31)
34 #define PLL_L_VAL(p) ((p)->offset + (p)->regs[PLL_OFF_L_VAL])
35 #define PLL_ALPHA_VAL(p) ((p)->offset + (p)->regs[PLL_OFF_ALPHA_VAL])
36 #define PLL_ALPHA_VAL_U(p) ((p)->offset + (p)->regs[PLL_OFF_ALPHA_VAL_U])
38 #define PLL_USER_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_USER_CTL])
39 # define PLL_POST_DIV_SHIFT 8
40 # define PLL_POST_DIV_MASK(p) GENMASK((p)->width, 0)
41 # define PLL_ALPHA_EN BIT(24)
42 # define PLL_ALPHA_MODE BIT(25)
43 # define PLL_VCO_SHIFT 20
44 # define PLL_VCO_MASK 0x3
46 #define PLL_USER_CTL_U(p) ((p)->offset + (p)->regs[PLL_OFF_USER_CTL_U])
48 #define PLL_CONFIG_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_CONFIG_CTL])
49 #define PLL_CONFIG_CTL_U(p) ((p)->offset + (p)->regs[PLL_OFF_CONFIG_CTL_U])
50 #define PLL_TEST_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_TEST_CTL])
51 #define PLL_TEST_CTL_U(p) ((p)->offset + (p)->regs[PLL_OFF_TEST_CTL_U])
52 #define PLL_STATUS(p) ((p)->offset + (p)->regs[PLL_OFF_STATUS])
53 #define PLL_OPMODE(p) ((p)->offset + (p)->regs[PLL_OFF_OPMODE])
54 #define PLL_FRAC(p) ((p)->offset + (p)->regs[PLL_OFF_FRAC])
56 const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = {
57 [CLK_ALPHA_PLL_TYPE_DEFAULT] = {
58 [PLL_OFF_L_VAL] = 0x04,
59 [PLL_OFF_ALPHA_VAL] = 0x08,
60 [PLL_OFF_ALPHA_VAL_U] = 0x0c,
61 [PLL_OFF_USER_CTL] = 0x10,
62 [PLL_OFF_USER_CTL_U] = 0x14,
63 [PLL_OFF_CONFIG_CTL] = 0x18,
64 [PLL_OFF_TEST_CTL] = 0x1c,
65 [PLL_OFF_TEST_CTL_U] = 0x20,
66 [PLL_OFF_STATUS] = 0x24,
68 [CLK_ALPHA_PLL_TYPE_HUAYRA] = {
69 [PLL_OFF_L_VAL] = 0x04,
70 [PLL_OFF_ALPHA_VAL] = 0x08,
71 [PLL_OFF_USER_CTL] = 0x10,
72 [PLL_OFF_CONFIG_CTL] = 0x14,
73 [PLL_OFF_CONFIG_CTL_U] = 0x18,
74 [PLL_OFF_TEST_CTL] = 0x1c,
75 [PLL_OFF_TEST_CTL_U] = 0x20,
76 [PLL_OFF_STATUS] = 0x24,
78 [CLK_ALPHA_PLL_TYPE_BRAMMO] = {
79 [PLL_OFF_L_VAL] = 0x04,
80 [PLL_OFF_ALPHA_VAL] = 0x08,
81 [PLL_OFF_ALPHA_VAL_U] = 0x0c,
82 [PLL_OFF_USER_CTL] = 0x10,
83 [PLL_OFF_CONFIG_CTL] = 0x18,
84 [PLL_OFF_TEST_CTL] = 0x1c,
85 [PLL_OFF_STATUS] = 0x24,
87 [CLK_ALPHA_PLL_TYPE_FABIA] = {
88 [PLL_OFF_L_VAL] = 0x04,
89 [PLL_OFF_USER_CTL] = 0x0c,
90 [PLL_OFF_USER_CTL_U] = 0x10,
91 [PLL_OFF_CONFIG_CTL] = 0x14,
92 [PLL_OFF_CONFIG_CTL_U] = 0x18,
93 [PLL_OFF_TEST_CTL] = 0x1c,
94 [PLL_OFF_TEST_CTL_U] = 0x20,
95 [PLL_OFF_STATUS] = 0x24,
96 [PLL_OFF_OPMODE] = 0x2c,
97 [PLL_OFF_FRAC] = 0x38,
100 EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
103 * Even though 40 bits are present, use only 32 for ease of calculation.
105 #define ALPHA_REG_BITWIDTH 40
106 #define ALPHA_REG_16BIT_WIDTH 16
107 #define ALPHA_BITWIDTH 32U
108 #define ALPHA_SHIFT(w) min(w, ALPHA_BITWIDTH)
110 #define PLL_HUAYRA_M_WIDTH 8
111 #define PLL_HUAYRA_M_SHIFT 8
112 #define PLL_HUAYRA_M_MASK 0xff
113 #define PLL_HUAYRA_N_SHIFT 0
114 #define PLL_HUAYRA_N_MASK 0xff
115 #define PLL_HUAYRA_ALPHA_WIDTH 16
117 #define FABIA_OPMODE_STANDBY 0x0
118 #define FABIA_OPMODE_RUN 0x1
120 #define FABIA_PLL_OUT_MASK 0x7
121 #define FABIA_PLL_RATE_MARGIN 500
123 #define pll_alpha_width(p) \
124 ((PLL_ALPHA_VAL_U(p) - PLL_ALPHA_VAL(p) == 4) ? \
125 ALPHA_REG_BITWIDTH : ALPHA_REG_16BIT_WIDTH)
127 #define pll_has_64bit_config(p) ((PLL_CONFIG_CTL_U(p) - PLL_CONFIG_CTL(p)) == 4)
129 #define to_clk_alpha_pll(_hw) container_of(to_clk_regmap(_hw), \
130 struct clk_alpha_pll, clkr)
132 #define to_clk_alpha_pll_postdiv(_hw) container_of(to_clk_regmap(_hw), \
133 struct clk_alpha_pll_postdiv, clkr)
135 static int wait_for_pll(struct clk_alpha_pll *pll, u32 mask, bool inverse,
141 const char *name = clk_hw_get_name(&pll->clkr.hw);
143 ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
147 for (count = 100; count > 0; count--) {
148 ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
151 if (inverse && !(val & mask))
153 else if ((val & mask) == mask)
159 WARN(1, "%s failed to %s!\n", name, action);
163 #define wait_for_pll_enable_active(pll) \
164 wait_for_pll(pll, PLL_ACTIVE_FLAG, 0, "enable")
166 #define wait_for_pll_enable_lock(pll) \
167 wait_for_pll(pll, PLL_LOCK_DET, 0, "enable")
169 #define wait_for_pll_disable(pll) \
170 wait_for_pll(pll, PLL_ACTIVE_FLAG, 1, "disable")
172 #define wait_for_pll_offline(pll) \
173 wait_for_pll(pll, PLL_OFFLINE_ACK, 0, "offline")
175 #define wait_for_pll_update(pll) \
176 wait_for_pll(pll, PLL_UPDATE, 1, "update")
178 #define wait_for_pll_update_ack_set(pll) \
179 wait_for_pll(pll, ALPHA_PLL_ACK_LATCH, 0, "update_ack_set")
181 #define wait_for_pll_update_ack_clear(pll) \
182 wait_for_pll(pll, ALPHA_PLL_ACK_LATCH, 1, "update_ack_clear")
184 void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
185 const struct alpha_pll_config *config)
189 regmap_write(regmap, PLL_L_VAL(pll), config->l);
190 regmap_write(regmap, PLL_ALPHA_VAL(pll), config->alpha);
191 regmap_write(regmap, PLL_CONFIG_CTL(pll), config->config_ctl_val);
193 if (pll_has_64bit_config(pll))
194 regmap_write(regmap, PLL_CONFIG_CTL_U(pll),
195 config->config_ctl_hi_val);
197 if (pll_alpha_width(pll) > 32)
198 regmap_write(regmap, PLL_ALPHA_VAL_U(pll), config->alpha_hi);
200 val = config->main_output_mask;
201 val |= config->aux_output_mask;
202 val |= config->aux2_output_mask;
203 val |= config->early_output_mask;
204 val |= config->pre_div_val;
205 val |= config->post_div_val;
206 val |= config->vco_val;
207 val |= config->alpha_en_mask;
208 val |= config->alpha_mode_mask;
210 mask = config->main_output_mask;
211 mask |= config->aux_output_mask;
212 mask |= config->aux2_output_mask;
213 mask |= config->early_output_mask;
214 mask |= config->pre_div_mask;
215 mask |= config->post_div_mask;
216 mask |= config->vco_mask;
218 regmap_update_bits(regmap, PLL_USER_CTL(pll), mask, val);
220 if (pll->flags & SUPPORTS_FSM_MODE)
221 qcom_pll_set_fsm_mode(regmap, PLL_MODE(pll), 6, 0);
223 EXPORT_SYMBOL_GPL(clk_alpha_pll_configure);
225 static int clk_alpha_pll_hwfsm_enable(struct clk_hw *hw)
228 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
231 ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
237 if (pll->flags & SUPPORTS_OFFLINE_REQ)
238 val &= ~PLL_OFFLINE_REQ;
240 ret = regmap_write(pll->clkr.regmap, PLL_MODE(pll), val);
244 /* Make sure enable request goes through before waiting for update */
247 return wait_for_pll_enable_active(pll);
250 static void clk_alpha_pll_hwfsm_disable(struct clk_hw *hw)
253 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
256 ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
260 if (pll->flags & SUPPORTS_OFFLINE_REQ) {
261 ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
262 PLL_OFFLINE_REQ, PLL_OFFLINE_REQ);
266 ret = wait_for_pll_offline(pll);
272 ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
277 wait_for_pll_disable(pll);
280 static int pll_is_enabled(struct clk_hw *hw, u32 mask)
283 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
286 ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
290 return !!(val & mask);
293 static int clk_alpha_pll_hwfsm_is_enabled(struct clk_hw *hw)
295 return pll_is_enabled(hw, PLL_ACTIVE_FLAG);
298 static int clk_alpha_pll_is_enabled(struct clk_hw *hw)
300 return pll_is_enabled(hw, PLL_LOCK_DET);
303 static int clk_alpha_pll_enable(struct clk_hw *hw)
306 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
309 mask = PLL_OUTCTRL | PLL_RESET_N | PLL_BYPASSNL;
310 ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
314 /* If in FSM mode, just vote for it */
315 if (val & PLL_VOTE_FSM_ENA) {
316 ret = clk_enable_regmap(hw);
319 return wait_for_pll_enable_active(pll);
322 /* Skip if already enabled */
323 if ((val & mask) == mask)
326 ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
327 PLL_BYPASSNL, PLL_BYPASSNL);
332 * H/W requires a 5us delay between disabling the bypass and
333 * de-asserting the reset.
338 ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
339 PLL_RESET_N, PLL_RESET_N);
343 ret = wait_for_pll_enable_lock(pll);
347 ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
348 PLL_OUTCTRL, PLL_OUTCTRL);
350 /* Ensure that the write above goes through before returning. */
355 static void clk_alpha_pll_disable(struct clk_hw *hw)
358 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
361 ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
365 /* If in FSM mode, just unvote it */
366 if (val & PLL_VOTE_FSM_ENA) {
367 clk_disable_regmap(hw);
372 regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), mask, 0);
374 /* Delay of 2 output clock ticks required until output is disabled */
378 mask = PLL_RESET_N | PLL_BYPASSNL;
379 regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), mask, 0);
383 alpha_pll_calc_rate(u64 prate, u32 l, u32 a, u32 alpha_width)
385 return (prate * l) + ((prate * a) >> ALPHA_SHIFT(alpha_width));
389 alpha_pll_round_rate(unsigned long rate, unsigned long prate, u32 *l, u64 *a,
396 remainder = do_div(quotient, prate);
404 /* Upper ALPHA_BITWIDTH bits of Alpha */
405 quotient = remainder << ALPHA_SHIFT(alpha_width);
407 remainder = do_div(quotient, prate);
413 return alpha_pll_calc_rate(prate, *l, *a, alpha_width);
416 static const struct pll_vco *
417 alpha_pll_find_vco(const struct clk_alpha_pll *pll, unsigned long rate)
419 const struct pll_vco *v = pll->vco_table;
420 const struct pll_vco *end = v + pll->num_vco;
423 if (rate >= v->min_freq && rate <= v->max_freq)
430 clk_alpha_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
432 u32 l, low, high, ctl;
433 u64 a = 0, prate = parent_rate;
434 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
435 u32 alpha_width = pll_alpha_width(pll);
437 regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l);
439 regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
440 if (ctl & PLL_ALPHA_EN) {
441 regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &low);
442 if (alpha_width > 32) {
443 regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL_U(pll),
445 a = (u64)high << 32 | low;
447 a = low & GENMASK(alpha_width - 1, 0);
450 if (alpha_width > ALPHA_BITWIDTH)
451 a >>= alpha_width - ALPHA_BITWIDTH;
454 return alpha_pll_calc_rate(prate, l, a, alpha_width);
458 static int __clk_alpha_pll_update_latch(struct clk_alpha_pll *pll)
463 regmap_read(pll->clkr.regmap, PLL_MODE(pll), &mode);
465 /* Latch the input to the PLL */
466 regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), PLL_UPDATE,
469 /* Wait for 2 reference cycle before checking ACK bit */
473 * PLL will latch the new L, Alpha and freq control word.
474 * PLL will respond by raising PLL_ACK_LATCH output when new programming
475 * has been latched in and PLL is being updated. When
476 * UPDATE_LOGIC_BYPASS bit is not set, PLL_UPDATE will be cleared
477 * automatically by hardware when PLL_ACK_LATCH is asserted by PLL.
479 if (mode & PLL_UPDATE_BYPASS) {
480 ret = wait_for_pll_update_ack_set(pll);
484 regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), PLL_UPDATE, 0);
486 ret = wait_for_pll_update(pll);
491 ret = wait_for_pll_update_ack_clear(pll);
495 /* Wait for PLL output to stabilize */
501 static int clk_alpha_pll_update_latch(struct clk_alpha_pll *pll,
502 int (*is_enabled)(struct clk_hw *))
504 if (!is_enabled(&pll->clkr.hw) ||
505 !(pll->flags & SUPPORTS_DYNAMIC_UPDATE))
508 return __clk_alpha_pll_update_latch(pll);
511 static int __clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
513 int (*is_enabled)(struct clk_hw *))
515 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
516 const struct pll_vco *vco;
517 u32 l, alpha_width = pll_alpha_width(pll);
520 rate = alpha_pll_round_rate(rate, prate, &l, &a, alpha_width);
521 vco = alpha_pll_find_vco(pll, rate);
522 if (pll->vco_table && !vco) {
523 pr_err("alpha pll not in a valid vco range\n");
527 regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
529 if (alpha_width > ALPHA_BITWIDTH)
530 a <<= alpha_width - ALPHA_BITWIDTH;
532 if (alpha_width > 32)
533 regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL_U(pll), a >> 32);
535 regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a);
538 regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
539 PLL_VCO_MASK << PLL_VCO_SHIFT,
540 vco->val << PLL_VCO_SHIFT);
543 regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
544 PLL_ALPHA_EN, PLL_ALPHA_EN);
546 return clk_alpha_pll_update_latch(pll, is_enabled);
549 static int clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
552 return __clk_alpha_pll_set_rate(hw, rate, prate,
553 clk_alpha_pll_is_enabled);
556 static int clk_alpha_pll_hwfsm_set_rate(struct clk_hw *hw, unsigned long rate,
559 return __clk_alpha_pll_set_rate(hw, rate, prate,
560 clk_alpha_pll_hwfsm_is_enabled);
563 static long clk_alpha_pll_round_rate(struct clk_hw *hw, unsigned long rate,
564 unsigned long *prate)
566 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
567 u32 l, alpha_width = pll_alpha_width(pll);
569 unsigned long min_freq, max_freq;
571 rate = alpha_pll_round_rate(rate, *prate, &l, &a, alpha_width);
572 if (!pll->vco_table || alpha_pll_find_vco(pll, rate))
575 min_freq = pll->vco_table[0].min_freq;
576 max_freq = pll->vco_table[pll->num_vco - 1].max_freq;
578 return clamp(rate, min_freq, max_freq);
582 alpha_huayra_pll_calc_rate(u64 prate, u32 l, u32 a)
585 * a contains 16 bit alpha_val in two’s compliment number in the range
588 if (a >= BIT(PLL_HUAYRA_ALPHA_WIDTH - 1))
591 return (prate * l) + (prate * a >> PLL_HUAYRA_ALPHA_WIDTH);
595 alpha_huayra_pll_round_rate(unsigned long rate, unsigned long prate,
602 remainder = do_div(quotient, prate);
610 quotient = remainder << PLL_HUAYRA_ALPHA_WIDTH;
611 remainder = do_div(quotient, prate);
617 * alpha_val should be in two’s compliment number in the range
618 * of [-0.5, 0.5) so if quotient >= 0.5 then increment the l value
619 * since alpha value will be subtracted in this case.
621 if (quotient >= BIT(PLL_HUAYRA_ALPHA_WIDTH - 1))
625 return alpha_huayra_pll_calc_rate(prate, *l, *a);
629 alpha_pll_huayra_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
631 u64 rate = parent_rate, tmp;
632 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
633 u32 l, alpha = 0, ctl, alpha_m, alpha_n;
635 regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l);
636 regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
638 if (ctl & PLL_ALPHA_EN) {
639 regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &alpha);
641 * Depending upon alpha_mode, it can be treated as M/N value or
642 * as a two’s compliment number. When alpha_mode=1,
643 * pll_alpha_val<15:8>=M and pll_apla_val<7:0>=N
647 * M is a signed number (-128 to 127) and N is unsigned
648 * (0 to 255). M/N has to be within +/-0.5.
650 * When alpha_mode=0, it is a two’s compliment number in the
653 * Fout=FIN*(L+(alpha_val)/2^16)
655 * where alpha_val is two’s compliment number.
657 if (!(ctl & PLL_ALPHA_MODE))
658 return alpha_huayra_pll_calc_rate(rate, l, alpha);
660 alpha_m = alpha >> PLL_HUAYRA_M_SHIFT & PLL_HUAYRA_M_MASK;
661 alpha_n = alpha >> PLL_HUAYRA_N_SHIFT & PLL_HUAYRA_N_MASK;
665 if (alpha_m >= BIT(PLL_HUAYRA_M_WIDTH - 1)) {
666 alpha_m = BIT(PLL_HUAYRA_M_WIDTH) - alpha_m;
668 do_div(tmp, alpha_n);
672 do_div(tmp, alpha_n);
679 return alpha_huayra_pll_calc_rate(rate, l, alpha);
682 static int alpha_pll_huayra_set_rate(struct clk_hw *hw, unsigned long rate,
685 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
686 u32 l, a, ctl, cur_alpha = 0;
688 rate = alpha_huayra_pll_round_rate(rate, prate, &l, &a);
690 regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
692 if (ctl & PLL_ALPHA_EN)
693 regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &cur_alpha);
696 * Huayra PLL supports PLL dynamic programming. User can change L_VAL,
697 * without having to go through the power on sequence.
699 if (clk_alpha_pll_is_enabled(hw)) {
700 if (cur_alpha != a) {
701 pr_err("clock needs to be gated %s\n",
702 clk_hw_get_name(hw));
706 regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
707 /* Ensure that the write above goes to detect L val change. */
709 return wait_for_pll_enable_lock(pll);
712 regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
713 regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a);
716 regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
719 regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
720 PLL_ALPHA_EN | PLL_ALPHA_MODE, PLL_ALPHA_EN);
725 static long alpha_pll_huayra_round_rate(struct clk_hw *hw, unsigned long rate,
726 unsigned long *prate)
730 return alpha_huayra_pll_round_rate(rate, *prate, &l, &a);
733 const struct clk_ops clk_alpha_pll_ops = {
734 .enable = clk_alpha_pll_enable,
735 .disable = clk_alpha_pll_disable,
736 .is_enabled = clk_alpha_pll_is_enabled,
737 .recalc_rate = clk_alpha_pll_recalc_rate,
738 .round_rate = clk_alpha_pll_round_rate,
739 .set_rate = clk_alpha_pll_set_rate,
741 EXPORT_SYMBOL_GPL(clk_alpha_pll_ops);
743 const struct clk_ops clk_alpha_pll_huayra_ops = {
744 .enable = clk_alpha_pll_enable,
745 .disable = clk_alpha_pll_disable,
746 .is_enabled = clk_alpha_pll_is_enabled,
747 .recalc_rate = alpha_pll_huayra_recalc_rate,
748 .round_rate = alpha_pll_huayra_round_rate,
749 .set_rate = alpha_pll_huayra_set_rate,
751 EXPORT_SYMBOL_GPL(clk_alpha_pll_huayra_ops);
753 const struct clk_ops clk_alpha_pll_hwfsm_ops = {
754 .enable = clk_alpha_pll_hwfsm_enable,
755 .disable = clk_alpha_pll_hwfsm_disable,
756 .is_enabled = clk_alpha_pll_hwfsm_is_enabled,
757 .recalc_rate = clk_alpha_pll_recalc_rate,
758 .round_rate = clk_alpha_pll_round_rate,
759 .set_rate = clk_alpha_pll_hwfsm_set_rate,
761 EXPORT_SYMBOL_GPL(clk_alpha_pll_hwfsm_ops);
764 clk_alpha_pll_postdiv_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
766 struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
769 regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
771 ctl >>= PLL_POST_DIV_SHIFT;
772 ctl &= PLL_POST_DIV_MASK(pll);
774 return parent_rate >> fls(ctl);
777 static const struct clk_div_table clk_alpha_div_table[] = {
786 static const struct clk_div_table clk_alpha_2bit_div_table[] = {
794 clk_alpha_pll_postdiv_round_rate(struct clk_hw *hw, unsigned long rate,
795 unsigned long *prate)
797 struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
798 const struct clk_div_table *table;
801 table = clk_alpha_2bit_div_table;
803 table = clk_alpha_div_table;
805 return divider_round_rate(hw, rate, prate, table,
806 pll->width, CLK_DIVIDER_POWER_OF_TWO);
810 clk_alpha_pll_postdiv_round_ro_rate(struct clk_hw *hw, unsigned long rate,
811 unsigned long *prate)
813 struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
816 regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
818 ctl >>= PLL_POST_DIV_SHIFT;
819 ctl &= BIT(pll->width) - 1;
822 if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT)
823 *prate = clk_hw_round_rate(clk_hw_get_parent(hw), div * rate);
825 return DIV_ROUND_UP_ULL((u64)*prate, div);
828 static int clk_alpha_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
829 unsigned long parent_rate)
831 struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
834 /* 16 -> 0xf, 8 -> 0x7, 4 -> 0x3, 2 -> 0x1, 1 -> 0x0 */
835 div = DIV_ROUND_UP_ULL((u64)parent_rate, rate) - 1;
837 return regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
838 PLL_POST_DIV_MASK(pll) << PLL_POST_DIV_SHIFT,
839 div << PLL_POST_DIV_SHIFT);
842 const struct clk_ops clk_alpha_pll_postdiv_ops = {
843 .recalc_rate = clk_alpha_pll_postdiv_recalc_rate,
844 .round_rate = clk_alpha_pll_postdiv_round_rate,
845 .set_rate = clk_alpha_pll_postdiv_set_rate,
847 EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_ops);
849 const struct clk_ops clk_alpha_pll_postdiv_ro_ops = {
850 .round_rate = clk_alpha_pll_postdiv_round_ro_rate,
851 .recalc_rate = clk_alpha_pll_postdiv_recalc_rate,
853 EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_ro_ops);
855 void clk_fabia_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
856 const struct alpha_pll_config *config)
861 regmap_write(regmap, PLL_L_VAL(pll), config->l);
864 regmap_write(regmap, PLL_FRAC(pll), config->alpha);
866 if (config->config_ctl_val)
867 regmap_write(regmap, PLL_CONFIG_CTL(pll),
868 config->config_ctl_val);
870 if (config->post_div_mask) {
871 mask = config->post_div_mask;
872 val = config->post_div_val;
873 regmap_update_bits(regmap, PLL_USER_CTL(pll), mask, val);
876 regmap_update_bits(regmap, PLL_MODE(pll), PLL_UPDATE_BYPASS,
879 regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N);
881 EXPORT_SYMBOL_GPL(clk_fabia_pll_configure);
883 static int alpha_pll_fabia_enable(struct clk_hw *hw)
886 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
888 struct regmap *regmap = pll->clkr.regmap;
890 ret = regmap_read(regmap, PLL_MODE(pll), &val);
894 /* If in FSM mode, just vote for it */
895 if (val & PLL_VOTE_FSM_ENA) {
896 ret = clk_enable_regmap(hw);
899 return wait_for_pll_enable_active(pll);
902 ret = regmap_read(regmap, PLL_OPMODE(pll), &opmode_val);
906 /* Skip If PLL is already running */
907 if ((opmode_val & FABIA_OPMODE_RUN) && (val & PLL_OUTCTRL))
910 ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0);
914 ret = regmap_write(regmap, PLL_OPMODE(pll), FABIA_OPMODE_STANDBY);
918 ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N,
923 ret = regmap_write(regmap, PLL_OPMODE(pll), FABIA_OPMODE_RUN);
927 ret = wait_for_pll_enable_lock(pll);
931 ret = regmap_update_bits(regmap, PLL_USER_CTL(pll),
932 FABIA_PLL_OUT_MASK, FABIA_PLL_OUT_MASK);
936 return regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL,
940 static void alpha_pll_fabia_disable(struct clk_hw *hw)
943 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
945 struct regmap *regmap = pll->clkr.regmap;
947 ret = regmap_read(regmap, PLL_MODE(pll), &val);
951 /* If in FSM mode, just unvote it */
952 if (val & PLL_FSM_ENA) {
953 clk_disable_regmap(hw);
957 ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0);
961 /* Disable main outputs */
962 ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), FABIA_PLL_OUT_MASK,
967 /* Place the PLL in STANDBY */
968 regmap_write(regmap, PLL_OPMODE(pll), FABIA_OPMODE_STANDBY);
971 static unsigned long alpha_pll_fabia_recalc_rate(struct clk_hw *hw,
972 unsigned long parent_rate)
974 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
975 u32 l, frac, alpha_width = pll_alpha_width(pll);
977 regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l);
978 regmap_read(pll->clkr.regmap, PLL_FRAC(pll), &frac);
980 return alpha_pll_calc_rate(parent_rate, l, frac, alpha_width);
983 static int alpha_pll_fabia_set_rate(struct clk_hw *hw, unsigned long rate,
986 struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
987 u32 val, l, alpha_width = pll_alpha_width(pll);
992 ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
996 rrate = alpha_pll_round_rate(rate, prate, &l, &a, alpha_width);
999 * Due to limited number of bits for fractional rate programming, the
1000 * rounded up rate could be marginally higher than the requested rate.
1002 if (rrate > (rate + FABIA_PLL_RATE_MARGIN) || rrate < rate) {
1003 pr_err("Call set rate on the PLL with rounded rates!\n");
1007 regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
1008 regmap_write(pll->clkr.regmap, PLL_FRAC(pll), a);
1010 return __clk_alpha_pll_update_latch(pll);
1013 const struct clk_ops clk_alpha_pll_fabia_ops = {
1014 .enable = alpha_pll_fabia_enable,
1015 .disable = alpha_pll_fabia_disable,
1016 .is_enabled = clk_alpha_pll_is_enabled,
1017 .set_rate = alpha_pll_fabia_set_rate,
1018 .recalc_rate = alpha_pll_fabia_recalc_rate,
1019 .round_rate = clk_alpha_pll_round_rate,
1021 EXPORT_SYMBOL_GPL(clk_alpha_pll_fabia_ops);
1023 const struct clk_ops clk_alpha_pll_fixed_fabia_ops = {
1024 .enable = alpha_pll_fabia_enable,
1025 .disable = alpha_pll_fabia_disable,
1026 .is_enabled = clk_alpha_pll_is_enabled,
1027 .recalc_rate = alpha_pll_fabia_recalc_rate,
1028 .round_rate = clk_alpha_pll_round_rate,
1030 EXPORT_SYMBOL_GPL(clk_alpha_pll_fixed_fabia_ops);
1032 static unsigned long clk_alpha_pll_postdiv_fabia_recalc_rate(struct clk_hw *hw,
1033 unsigned long parent_rate)
1035 struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
1036 u32 i, div = 1, val;
1039 if (!pll->post_div_table) {
1040 pr_err("Missing the post_div_table for the PLL\n");
1044 ret = regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &val);
1048 val >>= pll->post_div_shift;
1049 val &= BIT(pll->width) - 1;
1051 for (i = 0; i < pll->num_post_div; i++) {
1052 if (pll->post_div_table[i].val == val) {
1053 div = pll->post_div_table[i].div;
1058 return (parent_rate / div);
1061 static long clk_alpha_pll_postdiv_fabia_round_rate(struct clk_hw *hw,
1062 unsigned long rate, unsigned long *prate)
1064 struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
1066 if (!pll->post_div_table) {
1067 pr_err("Missing the post_div_table for the PLL\n");
1071 return divider_round_rate(hw, rate, prate, pll->post_div_table,
1072 pll->width, CLK_DIVIDER_ROUND_CLOSEST);
1075 static int clk_alpha_pll_postdiv_fabia_set_rate(struct clk_hw *hw,
1076 unsigned long rate, unsigned long parent_rate)
1078 struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
1079 int i, val = 0, div, ret;
1082 * If the PLL is in FSM mode, then treat set_rate callback as a
1085 ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
1089 if (val & PLL_VOTE_FSM_ENA)
1092 if (!pll->post_div_table) {
1093 pr_err("Missing the post_div_table for the PLL\n");
1097 div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
1098 for (i = 0; i < pll->num_post_div; i++) {
1099 if (pll->post_div_table[i].div == div) {
1100 val = pll->post_div_table[i].val;
1105 return regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
1106 (BIT(pll->width) - 1) << pll->post_div_shift,
1107 val << pll->post_div_shift);
1110 const struct clk_ops clk_alpha_pll_postdiv_fabia_ops = {
1111 .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate,
1112 .round_rate = clk_alpha_pll_postdiv_fabia_round_rate,
1113 .set_rate = clk_alpha_pll_postdiv_fabia_set_rate,
1115 EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_fabia_ops);