2 * Copyright 2013 Freescale Semiconductor, Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * clock driver for Freescale QorIQ SoCs.
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13 #include <linux/clk.h>
14 #include <linux/clk-provider.h>
15 #include <linux/clkdev.h>
16 #include <linux/fsl/guts.h>
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/of_address.h>
21 #include <linux/of_platform.h>
23 #include <linux/slab.h>
30 #define PLATFORM_PLL 0
34 #define CGA_PLL4 4 /* only on clockgen-1.0, which lacks CGB */
38 struct clockgen_pll_div {
44 struct clockgen_pll_div div[8];
47 #define CLKSEL_VALID 1
48 #define CLKSEL_80PCT 2 /* Only allowed if PLL <= 80% of max cpu freq */
50 struct clockgen_sourceinfo {
51 u32 flags; /* CLKSEL_xxx */
52 int pll; /* CGx_PLLn */
53 int div; /* PLL_DIVn */
56 #define NUM_MUX_PARENTS 16
58 struct clockgen_muxinfo {
59 struct clockgen_sourceinfo clksel[NUM_MUX_PARENTS];
68 * cmux freq must be >= platform pll.
69 * If not set, cmux freq must be >= platform pll/2
71 #define CG_CMUX_GE_PLAT 1
73 #define CG_PLL_8BIT 2 /* PLLCnGSR[CFG] is 8 bits, not 6 */
74 #define CG_VER3 4 /* version 3 cg: reg layout different */
75 #define CG_LITTLE_ENDIAN 8
77 struct clockgen_chipinfo {
78 const char *compat, *guts_compat;
79 const struct clockgen_muxinfo *cmux_groups[2];
80 const struct clockgen_muxinfo *hwaccel[NUM_HWACCEL];
81 void (*init_periph)(struct clockgen *cg);
82 int cmux_to_group[NUM_CMUX]; /* -1 terminates if fewer than NUM_CMUX */
83 u32 pll_mask; /* 1 << n bit set if PLL n is valid */
84 u32 flags; /* CG_xxx */
88 struct device_node *node;
90 struct clockgen_chipinfo info; /* mutable copy */
91 struct clk *sysclk, *coreclk;
92 struct clockgen_pll pll[6];
93 struct clk *cmux[NUM_CMUX];
94 struct clk *hwaccel[NUM_HWACCEL];
96 struct ccsr_guts __iomem *guts;
99 static struct clockgen clockgen;
101 static void cg_out(struct clockgen *cg, u32 val, u32 __iomem *reg)
103 if (cg->info.flags & CG_LITTLE_ENDIAN)
106 iowrite32be(val, reg);
109 static u32 cg_in(struct clockgen *cg, u32 __iomem *reg)
113 if (cg->info.flags & CG_LITTLE_ENDIAN)
116 val = ioread32be(reg);
121 static const struct clockgen_muxinfo p2041_cmux_grp1 = {
123 [0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
124 [1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
125 [4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
129 static const struct clockgen_muxinfo p2041_cmux_grp2 = {
131 [0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
132 [4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
133 [5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
137 static const struct clockgen_muxinfo p5020_cmux_grp1 = {
139 [0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
140 [1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
141 [4] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL2, PLL_DIV1 },
145 static const struct clockgen_muxinfo p5020_cmux_grp2 = {
147 [0] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL1, PLL_DIV1 },
148 [4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
149 [5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
153 static const struct clockgen_muxinfo p5040_cmux_grp1 = {
155 [0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
156 [1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
157 [4] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL2, PLL_DIV1 },
158 [5] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL2, PLL_DIV2 },
162 static const struct clockgen_muxinfo p5040_cmux_grp2 = {
164 [0] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL1, PLL_DIV1 },
165 [1] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL1, PLL_DIV2 },
166 [4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
167 [5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
171 static const struct clockgen_muxinfo p4080_cmux_grp1 = {
173 [0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
174 [1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
175 [4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
176 [5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
177 [8] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL3, PLL_DIV1 },
181 static const struct clockgen_muxinfo p4080_cmux_grp2 = {
183 [0] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL1, PLL_DIV1 },
184 [8] = { CLKSEL_VALID, CGA_PLL3, PLL_DIV1 },
185 [9] = { CLKSEL_VALID, CGA_PLL3, PLL_DIV2 },
186 [12] = { CLKSEL_VALID, CGA_PLL4, PLL_DIV1 },
187 [13] = { CLKSEL_VALID, CGA_PLL4, PLL_DIV2 },
191 static const struct clockgen_muxinfo t1023_cmux = {
193 [0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
194 [1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
198 static const struct clockgen_muxinfo t1040_cmux = {
200 [0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
201 [1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
202 [4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
203 [5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
208 static const struct clockgen_muxinfo clockgen2_cmux_cga = {
210 { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
211 { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
212 { CLKSEL_VALID, CGA_PLL1, PLL_DIV4 },
214 { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
215 { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
216 { CLKSEL_VALID, CGA_PLL2, PLL_DIV4 },
218 { CLKSEL_VALID, CGA_PLL3, PLL_DIV1 },
219 { CLKSEL_VALID, CGA_PLL3, PLL_DIV2 },
220 { CLKSEL_VALID, CGA_PLL3, PLL_DIV4 },
224 static const struct clockgen_muxinfo clockgen2_cmux_cga12 = {
226 { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
227 { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
228 { CLKSEL_VALID, CGA_PLL1, PLL_DIV4 },
230 { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
231 { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
232 { CLKSEL_VALID, CGA_PLL2, PLL_DIV4 },
236 static const struct clockgen_muxinfo clockgen2_cmux_cgb = {
238 { CLKSEL_VALID, CGB_PLL1, PLL_DIV1 },
239 { CLKSEL_VALID, CGB_PLL1, PLL_DIV2 },
240 { CLKSEL_VALID, CGB_PLL1, PLL_DIV4 },
242 { CLKSEL_VALID, CGB_PLL2, PLL_DIV1 },
243 { CLKSEL_VALID, CGB_PLL2, PLL_DIV2 },
244 { CLKSEL_VALID, CGB_PLL2, PLL_DIV4 },
248 static const struct clockgen_muxinfo ls1043a_hwa1 = {
252 { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
253 { CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
256 { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
257 { CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
261 static const struct clockgen_muxinfo ls1043a_hwa2 = {
264 { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
266 { CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
270 static const struct clockgen_muxinfo ls1046a_hwa1 = {
274 { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
275 { CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
276 { CLKSEL_VALID, CGA_PLL1, PLL_DIV4 },
277 { CLKSEL_VALID, PLATFORM_PLL, PLL_DIV1 },
278 { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
279 { CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
283 static const struct clockgen_muxinfo ls1046a_hwa2 = {
286 { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
287 { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
288 { CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
291 { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
295 static const struct clockgen_muxinfo ls1012a_cmux = {
297 [0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
299 [2] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
303 static const struct clockgen_muxinfo t1023_hwa1 = {
306 { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
307 { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
308 { CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
312 static const struct clockgen_muxinfo t1023_hwa2 = {
314 [6] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
318 static const struct clockgen_muxinfo t2080_hwa1 = {
321 { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
322 { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
323 { CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
324 { CLKSEL_VALID, CGA_PLL1, PLL_DIV4 },
325 { CLKSEL_VALID, PLATFORM_PLL, PLL_DIV1 },
326 { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
327 { CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
331 static const struct clockgen_muxinfo t2080_hwa2 = {
334 { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
335 { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
336 { CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
337 { CLKSEL_VALID, CGA_PLL2, PLL_DIV4 },
338 { CLKSEL_VALID, PLATFORM_PLL, PLL_DIV1 },
339 { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
340 { CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
344 static const struct clockgen_muxinfo t4240_hwa1 = {
346 { CLKSEL_VALID, PLATFORM_PLL, PLL_DIV2 },
347 { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
348 { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
349 { CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
350 { CLKSEL_VALID, CGA_PLL1, PLL_DIV4 },
352 { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
353 { CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
357 static const struct clockgen_muxinfo t4240_hwa4 = {
359 [2] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV2 },
360 [3] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV3 },
361 [4] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV4 },
362 [5] = { CLKSEL_VALID, PLATFORM_PLL, PLL_DIV1 },
363 [6] = { CLKSEL_VALID, CGB_PLL2, PLL_DIV2 },
367 static const struct clockgen_muxinfo t4240_hwa5 = {
369 [2] = { CLKSEL_VALID, CGB_PLL2, PLL_DIV2 },
370 [3] = { CLKSEL_VALID, CGB_PLL2, PLL_DIV3 },
371 [4] = { CLKSEL_VALID, CGB_PLL2, PLL_DIV4 },
372 [5] = { CLKSEL_VALID, PLATFORM_PLL, PLL_DIV1 },
373 [6] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV2 },
374 [7] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV3 },
378 #define RCWSR7_FM1_CLK_SEL 0x40000000
379 #define RCWSR7_FM2_CLK_SEL 0x20000000
380 #define RCWSR7_HWA_ASYNC_DIV 0x04000000
382 static void __init p2041_init_periph(struct clockgen *cg)
386 reg = ioread32be(&cg->guts->rcwsr[7]);
388 if (reg & RCWSR7_FM1_CLK_SEL)
389 cg->fman[0] = cg->pll[CGA_PLL2].div[PLL_DIV2].clk;
391 cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
394 static void __init p4080_init_periph(struct clockgen *cg)
398 reg = ioread32be(&cg->guts->rcwsr[7]);
400 if (reg & RCWSR7_FM1_CLK_SEL)
401 cg->fman[0] = cg->pll[CGA_PLL3].div[PLL_DIV2].clk;
403 cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
405 if (reg & RCWSR7_FM2_CLK_SEL)
406 cg->fman[1] = cg->pll[CGA_PLL3].div[PLL_DIV2].clk;
408 cg->fman[1] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
411 static void __init p5020_init_periph(struct clockgen *cg)
416 reg = ioread32be(&cg->guts->rcwsr[7]);
417 if (reg & RCWSR7_HWA_ASYNC_DIV)
420 if (reg & RCWSR7_FM1_CLK_SEL)
421 cg->fman[0] = cg->pll[CGA_PLL2].div[div].clk;
423 cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
426 static void __init p5040_init_periph(struct clockgen *cg)
431 reg = ioread32be(&cg->guts->rcwsr[7]);
432 if (reg & RCWSR7_HWA_ASYNC_DIV)
435 if (reg & RCWSR7_FM1_CLK_SEL)
436 cg->fman[0] = cg->pll[CGA_PLL3].div[div].clk;
438 cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
440 if (reg & RCWSR7_FM2_CLK_SEL)
441 cg->fman[1] = cg->pll[CGA_PLL3].div[div].clk;
443 cg->fman[1] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
446 static void __init t1023_init_periph(struct clockgen *cg)
448 cg->fman[0] = cg->hwaccel[1];
451 static void __init t1040_init_periph(struct clockgen *cg)
453 cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV1].clk;
456 static void __init t2080_init_periph(struct clockgen *cg)
458 cg->fman[0] = cg->hwaccel[0];
461 static void __init t4240_init_periph(struct clockgen *cg)
463 cg->fman[0] = cg->hwaccel[3];
464 cg->fman[1] = cg->hwaccel[4];
467 static const struct clockgen_chipinfo chipinfo[] = {
469 .compat = "fsl,b4420-clockgen",
470 .guts_compat = "fsl,b4860-device-config",
471 .init_periph = t2080_init_periph,
473 &clockgen2_cmux_cga12, &clockgen2_cmux_cgb
482 .flags = CG_PLL_8BIT,
485 .compat = "fsl,b4860-clockgen",
486 .guts_compat = "fsl,b4860-device-config",
487 .init_periph = t2080_init_periph,
489 &clockgen2_cmux_cga12, &clockgen2_cmux_cgb
498 .flags = CG_PLL_8BIT,
501 .compat = "fsl,ls1021a-clockgen",
511 .compat = "fsl,ls1043a-clockgen",
512 .init_periph = t2080_init_periph,
517 &ls1043a_hwa1, &ls1043a_hwa2
523 .flags = CG_PLL_8BIT,
526 .compat = "fsl,ls1046a-clockgen",
527 .init_periph = t2080_init_periph,
532 &ls1046a_hwa1, &ls1046a_hwa2
538 .flags = CG_PLL_8BIT,
541 .compat = "fsl,ls1088a-clockgen",
543 &clockgen2_cmux_cga12
549 .flags = CG_VER3 | CG_LITTLE_ENDIAN,
552 .compat = "fsl,ls1012a-clockgen",
562 .compat = "fsl,ls2080a-clockgen",
564 &clockgen2_cmux_cga12, &clockgen2_cmux_cgb
570 .flags = CG_VER3 | CG_LITTLE_ENDIAN,
573 .compat = "fsl,p2041-clockgen",
574 .guts_compat = "fsl,qoriq-device-config-1.0",
575 .init_periph = p2041_init_periph,
577 &p2041_cmux_grp1, &p2041_cmux_grp2
585 .compat = "fsl,p3041-clockgen",
586 .guts_compat = "fsl,qoriq-device-config-1.0",
587 .init_periph = p2041_init_periph,
589 &p2041_cmux_grp1, &p2041_cmux_grp2
597 .compat = "fsl,p4080-clockgen",
598 .guts_compat = "fsl,qoriq-device-config-1.0",
599 .init_periph = p4080_init_periph,
601 &p4080_cmux_grp1, &p4080_cmux_grp2
604 0, 0, 0, 0, 1, 1, 1, 1
609 .compat = "fsl,p5020-clockgen",
610 .guts_compat = "fsl,qoriq-device-config-1.0",
611 .init_periph = p5020_init_periph,
613 &p2041_cmux_grp1, &p2041_cmux_grp2
621 .compat = "fsl,p5040-clockgen",
622 .guts_compat = "fsl,p5040-device-config",
623 .init_periph = p5040_init_periph,
625 &p5040_cmux_grp1, &p5040_cmux_grp2
633 .compat = "fsl,t1023-clockgen",
634 .guts_compat = "fsl,t1023-device-config",
635 .init_periph = t1023_init_periph,
640 &t1023_hwa1, &t1023_hwa2
646 .flags = CG_PLL_8BIT,
649 .compat = "fsl,t1040-clockgen",
650 .guts_compat = "fsl,t1040-device-config",
651 .init_periph = t1040_init_periph,
659 .flags = CG_PLL_8BIT,
662 .compat = "fsl,t2080-clockgen",
663 .guts_compat = "fsl,t2080-device-config",
664 .init_periph = t2080_init_periph,
666 &clockgen2_cmux_cga12
669 &t2080_hwa1, &t2080_hwa2
675 .flags = CG_PLL_8BIT,
678 .compat = "fsl,t4240-clockgen",
679 .guts_compat = "fsl,t4240-device-config",
680 .init_periph = t4240_init_periph,
682 &clockgen2_cmux_cga, &clockgen2_cmux_cgb
685 &t4240_hwa1, NULL, NULL, &t4240_hwa4, &t4240_hwa5
691 .flags = CG_PLL_8BIT,
699 const struct clockgen_muxinfo *info;
701 u8 parent_to_clksel[NUM_MUX_PARENTS];
702 s8 clksel_to_parent[NUM_MUX_PARENTS];
706 #define to_mux_hwclock(p) container_of(p, struct mux_hwclock, hw)
707 #define CLKSEL_MASK 0x78000000
708 #define CLKSEL_SHIFT 27
710 static int mux_set_parent(struct clk_hw *hw, u8 idx)
712 struct mux_hwclock *hwc = to_mux_hwclock(hw);
715 if (idx >= hwc->num_parents)
718 clksel = hwc->parent_to_clksel[idx];
719 cg_out(hwc->cg, (clksel << CLKSEL_SHIFT) & CLKSEL_MASK, hwc->reg);
724 static u8 mux_get_parent(struct clk_hw *hw)
726 struct mux_hwclock *hwc = to_mux_hwclock(hw);
730 clksel = (cg_in(hwc->cg, hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
732 ret = hwc->clksel_to_parent[clksel];
734 pr_err("%s: mux at %p has bad clksel\n", __func__, hwc->reg);
741 static const struct clk_ops cmux_ops = {
742 .get_parent = mux_get_parent,
743 .set_parent = mux_set_parent,
747 * Don't allow setting for now, as the clock options haven't been
748 * sanitized for additional restrictions.
750 static const struct clk_ops hwaccel_ops = {
751 .get_parent = mux_get_parent,
754 static const struct clockgen_pll_div *get_pll_div(struct clockgen *cg,
755 struct mux_hwclock *hwc,
760 if (!(hwc->info->clksel[idx].flags & CLKSEL_VALID))
763 pll = hwc->info->clksel[idx].pll;
764 div = hwc->info->clksel[idx].div;
766 return &cg->pll[pll].div[div];
769 static struct clk * __init create_mux_common(struct clockgen *cg,
770 struct mux_hwclock *hwc,
771 const struct clk_ops *ops,
772 unsigned long min_rate,
773 unsigned long max_rate,
774 unsigned long pct80_rate,
775 const char *fmt, int idx)
777 struct clk_init_data init = {};
779 const struct clockgen_pll_div *div;
780 const char *parent_names[NUM_MUX_PARENTS];
784 snprintf(name, sizeof(name), fmt, idx);
786 for (i = 0, j = 0; i < NUM_MUX_PARENTS; i++) {
789 hwc->clksel_to_parent[i] = -1;
791 div = get_pll_div(cg, hwc, i);
795 rate = clk_get_rate(div->clk);
797 if (hwc->info->clksel[i].flags & CLKSEL_80PCT &&
805 parent_names[j] = div->name;
806 hwc->parent_to_clksel[j] = i;
807 hwc->clksel_to_parent[i] = j;
813 init.parent_names = parent_names;
814 init.num_parents = hwc->num_parents = j;
816 hwc->hw.init = &init;
819 clk = clk_register(NULL, &hwc->hw);
821 pr_err("%s: Couldn't register %s: %ld\n", __func__, name,
830 static struct clk * __init create_one_cmux(struct clockgen *cg, int idx)
832 struct mux_hwclock *hwc;
833 const struct clockgen_pll_div *div;
834 unsigned long plat_rate, min_rate;
835 u64 max_rate, pct80_rate;
838 hwc = kzalloc(sizeof(*hwc), GFP_KERNEL);
842 if (cg->info.flags & CG_VER3)
843 hwc->reg = cg->regs + 0x70000 + 0x20 * idx;
845 hwc->reg = cg->regs + 0x20 * idx;
847 hwc->info = cg->info.cmux_groups[cg->info.cmux_to_group[idx]];
850 * Find the rate for the default clksel, and treat it as the
851 * maximum rated core frequency. If this is an incorrect
852 * assumption, certain clock options (possibly including the
853 * default clksel) may be inappropriately excluded on certain
856 clksel = (cg_in(cg, hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
857 div = get_pll_div(cg, hwc, clksel);
863 max_rate = clk_get_rate(div->clk);
864 pct80_rate = max_rate * 8;
865 do_div(pct80_rate, 10);
867 plat_rate = clk_get_rate(cg->pll[PLATFORM_PLL].div[PLL_DIV1].clk);
869 if (cg->info.flags & CG_CMUX_GE_PLAT)
870 min_rate = plat_rate;
872 min_rate = plat_rate / 2;
874 return create_mux_common(cg, hwc, &cmux_ops, min_rate, max_rate,
875 pct80_rate, "cg-cmux%d", idx);
878 static struct clk * __init create_one_hwaccel(struct clockgen *cg, int idx)
880 struct mux_hwclock *hwc;
882 hwc = kzalloc(sizeof(*hwc), GFP_KERNEL);
886 hwc->reg = cg->regs + 0x20 * idx + 0x10;
887 hwc->info = cg->info.hwaccel[idx];
889 return create_mux_common(cg, hwc, &hwaccel_ops, 0, ULONG_MAX, 0,
890 "cg-hwaccel%d", idx);
893 static void __init create_muxes(struct clockgen *cg)
897 for (i = 0; i < ARRAY_SIZE(cg->cmux); i++) {
898 if (cg->info.cmux_to_group[i] < 0)
900 if (cg->info.cmux_to_group[i] >=
901 ARRAY_SIZE(cg->info.cmux_groups)) {
906 cg->cmux[i] = create_one_cmux(cg, i);
909 for (i = 0; i < ARRAY_SIZE(cg->hwaccel); i++) {
910 if (!cg->info.hwaccel[i])
913 cg->hwaccel[i] = create_one_hwaccel(cg, i);
917 static void __init clockgen_init(struct device_node *np);
920 * Legacy nodes may get probed before the parent clockgen node.
921 * It is assumed that device trees with legacy nodes will not
922 * contain a "clocks" property -- otherwise the input clocks may
923 * not be initialized at this point.
925 static void __init legacy_init_clockgen(struct device_node *np)
928 clockgen_init(of_get_parent(np));
932 static void __init core_mux_init(struct device_node *np)
938 legacy_init_clockgen(np);
940 if (of_address_to_resource(np, 0, &res))
943 idx = (res.start & 0xf0) >> 5;
944 clk = clockgen.cmux[idx];
946 rc = of_clk_add_provider(np, of_clk_src_simple_get, clk);
948 pr_err("%s: Couldn't register clk provider for node %pOFn: %d\n",
954 static struct clk __init
955 *sysclk_from_fixed(struct device_node *node, const char *name)
959 if (of_property_read_u32(node, "clock-frequency", &rate))
960 return ERR_PTR(-ENODEV);
962 return clk_register_fixed_rate(NULL, name, NULL, 0, rate);
965 static struct clk __init *input_clock(const char *name, struct clk *clk)
967 const char *input_name;
969 /* Register the input clock under the desired name. */
970 input_name = __clk_get_name(clk);
971 clk = clk_register_fixed_factor(NULL, name, input_name,
974 pr_err("%s: Couldn't register %s: %ld\n", __func__, name,
980 static struct clk __init *input_clock_by_name(const char *name,
985 clk = of_clk_get_by_name(clockgen.node, dtname);
989 return input_clock(name, clk);
992 static struct clk __init *input_clock_by_index(const char *name, int idx)
996 clk = of_clk_get(clockgen.node, 0);
1000 return input_clock(name, clk);
1003 static struct clk * __init create_sysclk(const char *name)
1005 struct device_node *sysclk;
1008 clk = sysclk_from_fixed(clockgen.node, name);
1012 clk = input_clock_by_name(name, "sysclk");
1016 clk = input_clock_by_index(name, 0);
1020 sysclk = of_get_child_by_name(clockgen.node, "sysclk");
1022 clk = sysclk_from_fixed(sysclk, name);
1027 pr_err("%s: No input sysclk\n", __func__);
1031 static struct clk * __init create_coreclk(const char *name)
1035 clk = input_clock_by_name(name, "coreclk");
1040 * This indicates a mix of legacy nodes with the new coreclk
1041 * mechanism, which should never happen. If this error occurs,
1042 * don't use the wrong input clock just because coreclk isn't
1045 if (WARN_ON(PTR_ERR(clk) == -EPROBE_DEFER))
1052 static void __init sysclk_init(struct device_node *node)
1056 legacy_init_clockgen(node);
1058 clk = clockgen.sysclk;
1060 of_clk_add_provider(node, of_clk_src_simple_get, clk);
1063 #define PLL_KILL BIT(31)
1065 static void __init create_one_pll(struct clockgen *cg, int idx)
1069 struct clockgen_pll *pll = &cg->pll[idx];
1070 const char *input = "cg-sysclk";
1073 if (!(cg->info.pll_mask & (1 << idx)))
1076 if (cg->coreclk && idx != PLATFORM_PLL) {
1077 if (IS_ERR(cg->coreclk))
1080 input = "cg-coreclk";
1083 if (cg->info.flags & CG_VER3) {
1086 reg = cg->regs + 0x60080;
1089 reg = cg->regs + 0x80;
1092 reg = cg->regs + 0xa0;
1095 reg = cg->regs + 0x10080;
1098 reg = cg->regs + 0x100a0;
1101 WARN_ONCE(1, "index %d\n", idx);
1105 if (idx == PLATFORM_PLL)
1106 reg = cg->regs + 0xc00;
1108 reg = cg->regs + 0x800 + 0x20 * (idx - 1);
1111 /* Get the multiple of PLL */
1112 mult = cg_in(cg, reg);
1114 /* Check if this PLL is disabled */
1115 if (mult & PLL_KILL) {
1116 pr_debug("%s(): pll %p disabled\n", __func__, reg);
1120 if ((cg->info.flags & CG_VER3) ||
1121 ((cg->info.flags & CG_PLL_8BIT) && idx != PLATFORM_PLL))
1122 mult = (mult & GENMASK(8, 1)) >> 1;
1124 mult = (mult & GENMASK(6, 1)) >> 1;
1126 for (i = 0; i < ARRAY_SIZE(pll->div); i++) {
1131 * For platform PLL, there are 8 divider clocks.
1132 * For core PLL, there are 4 divider clocks at most.
1134 if (idx != PLATFORM_PLL && i >= 4)
1137 snprintf(pll->div[i].name, sizeof(pll->div[i].name),
1138 "cg-pll%d-div%d", idx, i + 1);
1140 clk = clk_register_fixed_factor(NULL,
1141 pll->div[i].name, input, 0, mult, i + 1);
1143 pr_err("%s: %s: register failed %ld\n",
1144 __func__, pll->div[i].name, PTR_ERR(clk));
1148 pll->div[i].clk = clk;
1149 ret = clk_register_clkdev(clk, pll->div[i].name, NULL);
1151 pr_err("%s: %s: register to lookup table failed %ld\n",
1152 __func__, pll->div[i].name, PTR_ERR(clk));
1157 static void __init create_plls(struct clockgen *cg)
1161 for (i = 0; i < ARRAY_SIZE(cg->pll); i++)
1162 create_one_pll(cg, i);
1165 static void __init legacy_pll_init(struct device_node *np, int idx)
1167 struct clockgen_pll *pll;
1168 struct clk_onecell_data *onecell_data;
1169 struct clk **subclks;
1172 legacy_init_clockgen(np);
1174 pll = &clockgen.pll[idx];
1175 count = of_property_count_strings(np, "clock-output-names");
1177 BUILD_BUG_ON(ARRAY_SIZE(pll->div) < 4);
1178 subclks = kcalloc(4, sizeof(struct clk *), GFP_KERNEL);
1182 onecell_data = kmalloc(sizeof(*onecell_data), GFP_KERNEL);
1187 subclks[0] = pll->div[0].clk;
1188 subclks[1] = pll->div[1].clk;
1189 subclks[2] = pll->div[3].clk;
1191 subclks[0] = pll->div[0].clk;
1192 subclks[1] = pll->div[1].clk;
1193 subclks[2] = pll->div[2].clk;
1194 subclks[3] = pll->div[3].clk;
1197 onecell_data->clks = subclks;
1198 onecell_data->clk_num = count;
1200 rc = of_clk_add_provider(np, of_clk_src_onecell_get, onecell_data);
1202 pr_err("%s: Couldn't register clk provider for node %pOFn: %d\n",
1209 kfree(onecell_data);
1215 static void __init pltfrm_pll_init(struct device_node *np)
1217 legacy_pll_init(np, PLATFORM_PLL);
1221 static void __init core_pll_init(struct device_node *np)
1223 struct resource res;
1226 if (of_address_to_resource(np, 0, &res))
1229 if ((res.start & 0xfff) == 0xc00) {
1231 * ls1021a devtree labels the platform PLL
1232 * with the core PLL compatible
1234 pltfrm_pll_init(np);
1236 idx = (res.start & 0xf0) >> 5;
1237 legacy_pll_init(np, CGA_PLL1 + idx);
1241 static struct clk *clockgen_clk_get(struct of_phandle_args *clkspec, void *data)
1243 struct clockgen *cg = data;
1245 struct clockgen_pll *pll;
1248 if (clkspec->args_count < 2) {
1249 pr_err("%s: insufficient phandle args\n", __func__);
1250 return ERR_PTR(-EINVAL);
1253 type = clkspec->args[0];
1254 idx = clkspec->args[1];
1263 if (idx >= ARRAY_SIZE(cg->cmux))
1265 clk = cg->cmux[idx];
1268 if (idx >= ARRAY_SIZE(cg->hwaccel))
1270 clk = cg->hwaccel[idx];
1273 if (idx >= ARRAY_SIZE(cg->fman))
1275 clk = cg->fman[idx];
1278 pll = &cg->pll[PLATFORM_PLL];
1279 if (idx >= ARRAY_SIZE(pll->div))
1281 clk = pll->div[idx].clk;
1295 return ERR_PTR(-ENOENT);
1299 pr_err("%s: Bad phandle args %u %u\n", __func__, type, idx);
1300 return ERR_PTR(-EINVAL);
1304 #include <asm/mpc85xx.h>
1306 static const u32 a4510_svrs[] __initconst = {
1307 (SVR_P2040 << 8) | 0x10, /* P2040 1.0 */
1308 (SVR_P2040 << 8) | 0x11, /* P2040 1.1 */
1309 (SVR_P2041 << 8) | 0x10, /* P2041 1.0 */
1310 (SVR_P2041 << 8) | 0x11, /* P2041 1.1 */
1311 (SVR_P3041 << 8) | 0x10, /* P3041 1.0 */
1312 (SVR_P3041 << 8) | 0x11, /* P3041 1.1 */
1313 (SVR_P4040 << 8) | 0x20, /* P4040 2.0 */
1314 (SVR_P4080 << 8) | 0x20, /* P4080 2.0 */
1315 (SVR_P5010 << 8) | 0x10, /* P5010 1.0 */
1316 (SVR_P5010 << 8) | 0x20, /* P5010 2.0 */
1317 (SVR_P5020 << 8) | 0x10, /* P5020 1.0 */
1318 (SVR_P5021 << 8) | 0x10, /* P5021 1.0 */
1319 (SVR_P5040 << 8) | 0x10, /* P5040 1.0 */
1322 #define SVR_SECURITY 0x80000 /* The Security (E) bit */
1324 static bool __init has_erratum_a4510(void)
1326 u32 svr = mfspr(SPRN_SVR);
1329 svr &= ~SVR_SECURITY;
1331 for (i = 0; i < ARRAY_SIZE(a4510_svrs); i++) {
1332 if (svr == a4510_svrs[i])
1339 static bool __init has_erratum_a4510(void)
1345 static void __init clockgen_init(struct device_node *np)
1348 bool is_old_ls1021a = false;
1350 /* May have already been called by a legacy probe */
1355 clockgen.regs = of_iomap(np, 0);
1356 if (!clockgen.regs &&
1357 of_device_is_compatible(of_root, "fsl,ls1021a")) {
1358 /* Compatibility hack for old, broken device trees */
1359 clockgen.regs = ioremap(0x1ee1000, 0x1000);
1360 is_old_ls1021a = true;
1362 if (!clockgen.regs) {
1363 pr_err("%s(): %pOFn: of_iomap() failed\n", __func__, np);
1367 for (i = 0; i < ARRAY_SIZE(chipinfo); i++) {
1368 if (of_device_is_compatible(np, chipinfo[i].compat))
1370 if (is_old_ls1021a &&
1371 !strcmp(chipinfo[i].compat, "fsl,ls1021a-clockgen"))
1375 if (i == ARRAY_SIZE(chipinfo)) {
1376 pr_err("%s: unknown clockgen node %pOF\n", __func__, np);
1379 clockgen.info = chipinfo[i];
1381 if (clockgen.info.guts_compat) {
1382 struct device_node *guts;
1384 guts = of_find_compatible_node(NULL, NULL,
1385 clockgen.info.guts_compat);
1387 clockgen.guts = of_iomap(guts, 0);
1388 if (!clockgen.guts) {
1389 pr_err("%s: Couldn't map %pOF regs\n", __func__,
1396 if (has_erratum_a4510())
1397 clockgen.info.flags |= CG_CMUX_GE_PLAT;
1399 clockgen.sysclk = create_sysclk("cg-sysclk");
1400 clockgen.coreclk = create_coreclk("cg-coreclk");
1401 create_plls(&clockgen);
1402 create_muxes(&clockgen);
1404 if (clockgen.info.init_periph)
1405 clockgen.info.init_periph(&clockgen);
1407 ret = of_clk_add_provider(np, clockgen_clk_get, &clockgen);
1409 pr_err("%s: Couldn't register clk provider for node %pOFn: %d\n",
1415 iounmap(clockgen.regs);
1416 clockgen.regs = NULL;
1419 CLK_OF_DECLARE(qoriq_clockgen_1, "fsl,qoriq-clockgen-1.0", clockgen_init);
1420 CLK_OF_DECLARE(qoriq_clockgen_2, "fsl,qoriq-clockgen-2.0", clockgen_init);
1421 CLK_OF_DECLARE(qoriq_clockgen_ls1012a, "fsl,ls1012a-clockgen", clockgen_init);
1422 CLK_OF_DECLARE(qoriq_clockgen_ls1021a, "fsl,ls1021a-clockgen", clockgen_init);
1423 CLK_OF_DECLARE(qoriq_clockgen_ls1043a, "fsl,ls1043a-clockgen", clockgen_init);
1424 CLK_OF_DECLARE(qoriq_clockgen_ls1046a, "fsl,ls1046a-clockgen", clockgen_init);
1425 CLK_OF_DECLARE(qoriq_clockgen_ls1088a, "fsl,ls1088a-clockgen", clockgen_init);
1426 CLK_OF_DECLARE(qoriq_clockgen_ls2080a, "fsl,ls2080a-clockgen", clockgen_init);
1429 CLK_OF_DECLARE(qoriq_sysclk_1, "fsl,qoriq-sysclk-1.0", sysclk_init);
1430 CLK_OF_DECLARE(qoriq_sysclk_2, "fsl,qoriq-sysclk-2.0", sysclk_init);
1431 CLK_OF_DECLARE(qoriq_core_pll_1, "fsl,qoriq-core-pll-1.0", core_pll_init);
1432 CLK_OF_DECLARE(qoriq_core_pll_2, "fsl,qoriq-core-pll-2.0", core_pll_init);
1433 CLK_OF_DECLARE(qoriq_core_mux_1, "fsl,qoriq-core-mux-1.0", core_mux_init);
1434 CLK_OF_DECLARE(qoriq_core_mux_2, "fsl,qoriq-core-mux-2.0", core_mux_init);
1435 CLK_OF_DECLARE(qoriq_pltfrm_pll_1, "fsl,qoriq-platform-pll-1.0", pltfrm_pll_init);
1436 CLK_OF_DECLARE(qoriq_pltfrm_pll_2, "fsl,qoriq-platform-pll-2.0", pltfrm_pll_init);