2 * r8a73a4 clock framework support
4 * Copyright (C) 2013 Renesas Solutions Corp.
5 * Copyright (C) 2013 Magnus Damm
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include <linux/init.h>
22 #include <linux/kernel.h>
23 #include <linux/sh_clk.h>
24 #include <linux/clkdev.h>
25 #include <mach/clock.h>
26 #include <mach/common.h>
28 #define CPG_BASE 0xe6150000
31 #define SMSTPCR2 0xe6150138
32 #define SMSTPCR3 0xe615013c
33 #define SMSTPCR5 0xe6150144
35 #define FRQCRA 0xE6150000
36 #define FRQCRB 0xE6150004
37 #define VCLKCR1 0xE6150008
38 #define VCLKCR2 0xE615000C
39 #define VCLKCR3 0xE615001C
40 #define VCLKCR4 0xE6150014
41 #define VCLKCR5 0xE6150034
42 #define ZBCKCR 0xE6150010
43 #define SD0CKCR 0xE6150074
44 #define SD1CKCR 0xE6150078
45 #define SD2CKCR 0xE615007C
46 #define MMC0CKCR 0xE6150240
47 #define MMC1CKCR 0xE6150244
48 #define FSIACKCR 0xE6150018
49 #define FSIBCKCR 0xE6150090
50 #define MPCKCR 0xe6150080
51 #define SPUVCKCR 0xE6150094
52 #define HSICKCR 0xE615026C
53 #define M4CKCR 0xE6150098
54 #define PLLECR 0xE61500D0
55 #define PLL1CR 0xE6150028
56 #define PLL2CR 0xE615002C
57 #define PLL2SCR 0xE61501F4
58 #define PLL2HCR 0xE61501E4
59 #define CKSCR 0xE61500C0
61 #define CPG_MAP(o) ((o - CPG_BASE) + cpg_mapping.base)
63 static struct clk_mapping cpg_mapping = {
68 static struct clk extalr_clk = {
70 .mapping = &cpg_mapping,
73 static struct clk extal1_clk = {
75 .mapping = &cpg_mapping,
78 static struct clk extal2_clk = {
80 .mapping = &cpg_mapping,
83 static struct sh_clk_ops followparent_clk_ops = {
84 .recalc = followparent_recalc,
87 static struct clk main_clk = {
88 /* .parent will be set r8a73a4_clock_init */
89 .ops = &followparent_clk_ops,
92 SH_CLK_RATIO(div2, 1, 2);
93 SH_CLK_RATIO(div4, 1, 4);
95 SH_FIXED_RATIO_CLK(main_div2_clk, main_clk, div2);
96 SH_FIXED_RATIO_CLK(extal1_div2_clk, extal1_clk, div2);
97 SH_FIXED_RATIO_CLK(extal2_div2_clk, extal2_clk, div2);
98 SH_FIXED_RATIO_CLK(extal2_div4_clk, extal2_clk, div4);
100 /* External FSIACK/FSIBCK clock */
101 static struct clk fsiack_clk = {
104 static struct clk fsibck_clk = {
110 static struct clk *pll_parent_main[] = {
115 static struct clk *pll_parent_main_extal[8] = {
116 [0] = &main_div2_clk,
117 [1] = &extal2_div2_clk,
118 [3] = &extal2_div4_clk,
123 static unsigned long pll_recalc(struct clk *clk)
125 unsigned long mult = 1;
127 if (ioread32(CPG_MAP(PLLECR)) & (1 << clk->enable_bit))
128 mult = (((ioread32(clk->mapped_reg) >> 24) & 0x7f) + 1);
130 return clk->parent->rate * mult;
133 static int pll_set_parent(struct clk *clk, struct clk *parent)
138 if (!clk->parent_table || !clk->parent_num)
141 /* Search the parent */
142 for (i = 0; i < clk->parent_num; i++)
143 if (clk->parent_table[i] == parent)
146 if (i == clk->parent_num)
149 ret = clk_reparent(clk, parent);
153 val = ioread32(clk->mapped_reg) &
154 ~(((1 << clk->src_width) - 1) << clk->src_shift);
156 iowrite32(val | i << clk->src_shift, clk->mapped_reg);
161 static struct sh_clk_ops pll_clk_ops = {
162 .recalc = pll_recalc,
163 .set_parent = pll_set_parent,
166 #define PLL_CLOCK(name, p, pt, w, s, reg, e) \
167 static struct clk name = { \
168 .ops = &pll_clk_ops, \
169 .flags = CLK_ENABLE_ON_INIT, \
171 .parent_table = pt, \
172 .parent_num = ARRAY_SIZE(pt), \
175 .enable_reg = (void __iomem *)reg, \
177 .mapping = &cpg_mapping, \
180 PLL_CLOCK(pll1_clk, &main_clk, pll_parent_main, 1, 7, PLL1CR, 1);
181 PLL_CLOCK(pll2_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2CR, 2);
182 PLL_CLOCK(pll2s_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2SCR, 4);
183 PLL_CLOCK(pll2h_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2HCR, 5);
185 SH_FIXED_RATIO_CLK(pll1_div2_clk, pll1_clk, div2);
187 static struct clk *main_clks[] = {
206 static void div4_kick(struct clk *clk)
210 /* set KICK bit in FRQCRB to update hardware setting */
211 value = ioread32(CPG_MAP(FRQCRB));
213 iowrite32(value, CPG_MAP(FRQCRB));
216 static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18, 24, 0, 36, 48, 10};
218 static struct clk_div_mult_table div4_div_mult_table = {
219 .divisors = divisors,
220 .nr_divisors = ARRAY_SIZE(divisors),
223 static struct clk_div4_table div4_table = {
224 .div_mult_table = &div4_div_mult_table,
229 DIV4_I, DIV4_M3, DIV4_B, DIV4_M1, DIV4_M2,
230 DIV4_ZX, DIV4_ZS, DIV4_HP,
233 static struct clk div4_clks[DIV4_NR] = {
234 [DIV4_I] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 20, 0x0dff, CLK_ENABLE_ON_INIT),
235 [DIV4_M3] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 12, 0x1dff, CLK_ENABLE_ON_INIT),
236 [DIV4_B] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 8, 0x0dff, CLK_ENABLE_ON_INIT),
237 [DIV4_M1] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 4, 0x1dff, 0),
238 [DIV4_M2] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 0, 0x1dff, 0),
239 [DIV4_ZX] = SH_CLK_DIV4(&pll1_clk, FRQCRB, 12, 0x0dff, 0),
240 [DIV4_ZS] = SH_CLK_DIV4(&pll1_clk, FRQCRB, 8, 0x0dff, 0),
241 [DIV4_HP] = SH_CLK_DIV4(&pll1_clk, FRQCRB, 4, 0x0dff, 0),
246 DIV6_SDHI0, DIV6_SDHI1, DIV6_SDHI2,
247 DIV6_MMC0, DIV6_MMC1,
248 DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_VCK4, DIV6_VCK5,
249 DIV6_FSIA, DIV6_FSIB,
250 DIV6_MP, DIV6_M4, DIV6_HSI, DIV6_SPUV,
253 static struct clk *div6_parents[8] = {
254 [0] = &pll1_div2_clk,
257 [4] = &main_div2_clk,
261 static struct clk *fsia_parents[4] = {
262 [0] = &pll1_div2_clk,
267 static struct clk *fsib_parents[4] = {
268 [0] = &pll1_div2_clk,
273 static struct clk *mp_parents[4] = {
274 [0] = &pll1_div2_clk,
280 static struct clk *m4_parents[2] = {
284 static struct clk *hsi_parents[4] = {
286 [1] = &pll1_div2_clk,
291 * SH_CLK_DIV6_EXT() macro doesn't care .mapping
292 * but, it is necessary on R-Car (= ioremap() base CPG)
293 * The difference between
294 * SH_CLK_DIV6_EXT() <--> SH_CLK_MAP_DIV6_EXT()
297 #define SH_CLK_MAP_DIV6_EXT(_reg, _flags, _parents, \
298 _num_parents, _src_shift, _src_width) \
300 .enable_reg = (void __iomem *)_reg, \
301 .enable_bit = 0, /* unused */ \
302 .flags = _flags | CLK_MASK_DIV_ON_DISABLE, \
303 .div_mask = SH_CLK_DIV6_MSK, \
304 .parent_table = _parents, \
305 .parent_num = _num_parents, \
306 .src_shift = _src_shift, \
307 .src_width = _src_width, \
308 .mapping = &cpg_mapping, \
311 static struct clk div6_clks[DIV6_NR] = {
312 [DIV6_ZB] = SH_CLK_MAP_DIV6_EXT(ZBCKCR, CLK_ENABLE_ON_INIT,
313 div6_parents, 2, 7, 1),
314 [DIV6_SDHI0] = SH_CLK_MAP_DIV6_EXT(SD0CKCR, 0,
315 div6_parents, 2, 6, 2),
316 [DIV6_SDHI1] = SH_CLK_MAP_DIV6_EXT(SD1CKCR, 0,
317 div6_parents, 2, 6, 2),
318 [DIV6_SDHI2] = SH_CLK_MAP_DIV6_EXT(SD2CKCR, 0,
319 div6_parents, 2, 6, 2),
320 [DIV6_MMC0] = SH_CLK_MAP_DIV6_EXT(MMC0CKCR, 0,
321 div6_parents, 2, 6, 2),
322 [DIV6_MMC1] = SH_CLK_MAP_DIV6_EXT(MMC1CKCR, 0,
323 div6_parents, 2, 6, 2),
324 [DIV6_VCK1] = SH_CLK_MAP_DIV6_EXT(VCLKCR1, 0, /* didn't care bit[6-7] */
325 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
326 [DIV6_VCK2] = SH_CLK_MAP_DIV6_EXT(VCLKCR2, 0, /* didn't care bit[6-7] */
327 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
328 [DIV6_VCK3] = SH_CLK_MAP_DIV6_EXT(VCLKCR3, 0, /* didn't care bit[6-7] */
329 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
330 [DIV6_VCK4] = SH_CLK_MAP_DIV6_EXT(VCLKCR4, 0, /* didn't care bit[6-7] */
331 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
332 [DIV6_VCK5] = SH_CLK_MAP_DIV6_EXT(VCLKCR5, 0, /* didn't care bit[6-7] */
333 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
334 [DIV6_FSIA] = SH_CLK_MAP_DIV6_EXT(FSIACKCR, 0,
335 fsia_parents, ARRAY_SIZE(fsia_parents), 6, 2),
336 [DIV6_FSIB] = SH_CLK_MAP_DIV6_EXT(FSIBCKCR, 0,
337 fsib_parents, ARRAY_SIZE(fsib_parents), 6, 2),
338 [DIV6_MP] = SH_CLK_MAP_DIV6_EXT(MPCKCR, 0, /* it needs bit[9-11] control */
339 mp_parents, ARRAY_SIZE(mp_parents), 6, 2),
340 /* pll2s will be selected always for M4 */
341 [DIV6_M4] = SH_CLK_MAP_DIV6_EXT(M4CKCR, 0, /* it needs bit[9] control */
342 m4_parents, ARRAY_SIZE(m4_parents), 6, 1),
343 [DIV6_HSI] = SH_CLK_MAP_DIV6_EXT(HSICKCR, 0, /* it needs bit[9] control */
344 hsi_parents, ARRAY_SIZE(hsi_parents), 6, 2),
345 [DIV6_SPUV] = SH_CLK_MAP_DIV6_EXT(SPUVCKCR, 0,
346 mp_parents, ARRAY_SIZE(mp_parents), 6, 2),
351 MSTP217, MSTP216, MSTP207, MSTP206, MSTP204, MSTP203,
352 MSTP315, MSTP314, MSTP313, MSTP312, MSTP305,
357 static struct clk mstp_clks[MSTP_NR] = {
358 [MSTP204] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 4, 0), /* SCIFA0 */
359 [MSTP203] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 3, 0), /* SCIFA1 */
360 [MSTP206] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 6, 0), /* SCIFB0 */
361 [MSTP207] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 7, 0), /* SCIFB1 */
362 [MSTP216] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 16, 0), /* SCIFB2 */
363 [MSTP217] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 17, 0), /* SCIFB3 */
364 [MSTP305] = SH_CLK_MSTP32(&div6_clks[DIV6_MMC1],SMSTPCR3, 5, 0), /* MMCIF1 */
365 [MSTP312] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI2],SMSTPCR3, 12, 0), /* SDHI2 */
366 [MSTP313] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI1],SMSTPCR3, 13, 0), /* SDHI1 */
367 [MSTP314] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI0],SMSTPCR3, 14, 0), /* SDHI0 */
368 [MSTP315] = SH_CLK_MSTP32(&div6_clks[DIV6_MMC0],SMSTPCR3, 15, 0), /* MMCIF0 */
369 [MSTP522] = SH_CLK_MSTP32(&extal2_clk, SMSTPCR5, 22, 0), /* Thermal */
372 static struct clk_lookup lookups[] = {
374 CLKDEV_CON_ID("extal1", &extal1_clk),
375 CLKDEV_CON_ID("extal1_div2", &extal1_div2_clk),
376 CLKDEV_CON_ID("extal2", &extal2_clk),
377 CLKDEV_CON_ID("extal2_div2", &extal2_div2_clk),
378 CLKDEV_CON_ID("extal2_div4", &extal2_div4_clk),
379 CLKDEV_CON_ID("fsiack", &fsiack_clk),
380 CLKDEV_CON_ID("fsibck", &fsibck_clk),
383 CLKDEV_CON_ID("pll1", &pll1_clk),
384 CLKDEV_CON_ID("pll1_div2", &pll1_div2_clk),
385 CLKDEV_CON_ID("pll2", &pll2_clk),
386 CLKDEV_CON_ID("pll2s", &pll2s_clk),
387 CLKDEV_CON_ID("pll2h", &pll2h_clk),
390 CLKDEV_CON_ID("zb", &div6_clks[DIV6_ZB]),
391 CLKDEV_CON_ID("vck1", &div6_clks[DIV6_VCK1]),
392 CLKDEV_CON_ID("vck2", &div6_clks[DIV6_VCK2]),
393 CLKDEV_CON_ID("vck3", &div6_clks[DIV6_VCK3]),
394 CLKDEV_CON_ID("vck4", &div6_clks[DIV6_VCK4]),
395 CLKDEV_CON_ID("vck5", &div6_clks[DIV6_VCK5]),
396 CLKDEV_CON_ID("fsia", &div6_clks[DIV6_FSIA]),
397 CLKDEV_CON_ID("fsib", &div6_clks[DIV6_FSIB]),
398 CLKDEV_CON_ID("mp", &div6_clks[DIV6_MP]),
399 CLKDEV_CON_ID("m4", &div6_clks[DIV6_M4]),
400 CLKDEV_CON_ID("hsi", &div6_clks[DIV6_HSI]),
401 CLKDEV_CON_ID("spuv", &div6_clks[DIV6_SPUV]),
404 CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]),
405 CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]),
406 CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP206]),
407 CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP207]),
408 CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP216]),
409 CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP217]),
410 CLKDEV_DEV_ID("rcar_thermal", &mstp_clks[MSTP522]),
411 CLKDEV_DEV_ID("sh_mmcif.1", &mstp_clks[MSTP305]),
412 CLKDEV_DEV_ID("ee220000.mmcif", &mstp_clks[MSTP305]),
413 CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP312]),
414 CLKDEV_DEV_ID("ee140000.sdhi", &mstp_clks[MSTP312]),
415 CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP313]),
416 CLKDEV_DEV_ID("ee120000.sdhi", &mstp_clks[MSTP313]),
417 CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP314]),
418 CLKDEV_DEV_ID("ee100000.sdhi", &mstp_clks[MSTP314]),
419 CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP315]),
420 CLKDEV_DEV_ID("ee200000.mmcif", &mstp_clks[MSTP315]),
423 CLKDEV_DEV_ID("e61f0000.thermal", &mstp_clks[MSTP522]),
426 void __init r8a73a4_clock_init(void)
432 reg = ioremap_nocache(CKSCR, PAGE_SIZE);
434 ckscr = ioread32(reg);
437 switch ((ckscr >> 28) & 0x3) {
439 main_clk.parent = &extal1_clk;
442 main_clk.parent = &extal1_div2_clk;
445 main_clk.parent = &extal2_clk;
448 main_clk.parent = &extal2_div2_clk;
452 for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
453 ret = clk_register(main_clks[k]);
456 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
459 ret = sh_clk_div6_reparent_register(div6_clks, DIV6_NR);
462 ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
464 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
469 panic("failed to setup r8a73a4 clocks\n");