1 /* linux/arch/arm/mach-s5p64x0/clock-s5p6440.c
3 * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
6 * S5P6440 - Clock support
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/list.h>
17 #include <linux/errno.h>
18 #include <linux/err.h>
19 #include <linux/clk.h>
20 #include <linux/device.h>
23 #include <mach/hardware.h>
25 #include <mach/regs-clock.h>
27 #include <plat/cpu-freq.h>
28 #include <plat/clock.h>
31 #include <plat/s5p-clock.h>
32 #include <plat/clock-clksrc.h>
37 static u32 epll_div[][5] = {
38 { 36000000, 0, 48, 1, 4 },
39 { 48000000, 0, 32, 1, 3 },
40 { 60000000, 0, 40, 1, 3 },
41 { 72000000, 0, 48, 1, 3 },
42 { 84000000, 0, 28, 1, 2 },
43 { 96000000, 0, 32, 1, 2 },
44 { 32768000, 45264, 43, 1, 4 },
45 { 45158000, 6903, 30, 1, 3 },
46 { 49152000, 50332, 32, 1, 3 },
47 { 67738000, 10398, 45, 1, 3 },
48 { 73728000, 9961, 49, 1, 3 }
51 static int s5p6440_epll_set_rate(struct clk *clk, unsigned long rate)
53 unsigned int epll_con, epll_con_k;
56 if (clk->rate == rate) /* Return if nothing changed */
59 epll_con = __raw_readl(S5P64X0_EPLL_CON);
60 epll_con_k = __raw_readl(S5P64X0_EPLL_CON_K);
62 epll_con_k &= ~(PLL90XX_KDIV_MASK);
63 epll_con &= ~(PLL90XX_MDIV_MASK | PLL90XX_PDIV_MASK | PLL90XX_SDIV_MASK);
65 for (i = 0; i < ARRAY_SIZE(epll_div); i++) {
66 if (epll_div[i][0] == rate) {
67 epll_con_k |= (epll_div[i][1] << PLL90XX_KDIV_SHIFT);
68 epll_con |= (epll_div[i][2] << PLL90XX_MDIV_SHIFT) |
69 (epll_div[i][3] << PLL90XX_PDIV_SHIFT) |
70 (epll_div[i][4] << PLL90XX_SDIV_SHIFT);
75 if (i == ARRAY_SIZE(epll_div)) {
76 printk(KERN_ERR "%s: Invalid Clock EPLL Frequency\n", __func__);
80 __raw_writel(epll_con, S5P64X0_EPLL_CON);
81 __raw_writel(epll_con_k, S5P64X0_EPLL_CON_K);
83 printk(KERN_WARNING "EPLL Rate changes from %lu to %lu\n",
91 static struct clk_ops s5p6440_epll_ops = {
92 .get_rate = s5p_epll_get_rate,
93 .set_rate = s5p6440_epll_set_rate,
96 static struct clksrc_clk clk_hclk = {
99 .parent = &clk_armclk.clk,
101 .reg_div = { .reg = S5P64X0_CLK_DIV0, .shift = 8, .size = 4 },
104 static struct clksrc_clk clk_pclk = {
107 .parent = &clk_hclk.clk,
109 .reg_div = { .reg = S5P64X0_CLK_DIV0, .shift = 12, .size = 4 },
111 static struct clksrc_clk clk_hclk_low = {
113 .name = "clk_hclk_low",
115 .sources = &clkset_hclk_low,
116 .reg_src = { .reg = S5P64X0_SYS_OTHERS, .shift = 6, .size = 1 },
117 .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 8, .size = 4 },
120 static struct clksrc_clk clk_pclk_low = {
122 .name = "clk_pclk_low",
123 .parent = &clk_hclk_low.clk,
125 .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 12, .size = 4 },
129 * The following clocks will be disabled during clock initialization. It is
130 * recommended to keep the following clocks disabled until the driver requests
131 * for enabling the clock.
133 static struct clk init_clocks_off[] = {
136 .parent = &clk_hclk.clk,
137 .enable = s5p64x0_mem_ctrl,
141 .parent = &clk_hclk_low.clk,
142 .enable = s5p64x0_hclk0_ctrl,
146 .parent = &clk_hclk.clk,
147 .enable = s5p64x0_hclk0_ctrl,
151 .devname = "dma-pl330",
152 .parent = &clk_hclk_low.clk,
153 .enable = s5p64x0_hclk0_ctrl,
154 .ctrlbit = (1 << 12),
157 .devname = "s3c-sdhci.0",
158 .parent = &clk_hclk_low.clk,
159 .enable = s5p64x0_hclk0_ctrl,
160 .ctrlbit = (1 << 17),
163 .devname = "s3c-sdhci.1",
164 .parent = &clk_hclk_low.clk,
165 .enable = s5p64x0_hclk0_ctrl,
166 .ctrlbit = (1 << 18),
169 .devname = "s3c-sdhci.2",
170 .parent = &clk_hclk_low.clk,
171 .enable = s5p64x0_hclk0_ctrl,
172 .ctrlbit = (1 << 19),
175 .parent = &clk_hclk_low.clk,
176 .enable = s5p64x0_hclk0_ctrl,
180 .parent = &clk_hclk.clk,
181 .enable = s5p64x0_hclk0_ctrl,
182 .ctrlbit = (1 << 25),
185 .parent = &clk_hclk_low.clk,
186 .enable = s5p64x0_hclk1_ctrl,
189 .name = "hclk_fimgvg",
190 .parent = &clk_hclk.clk,
191 .enable = s5p64x0_hclk1_ctrl,
195 .parent = &clk_hclk_low.clk,
196 .enable = s5p64x0_hclk1_ctrl,
200 .parent = &clk_pclk_low.clk,
201 .enable = s5p64x0_pclk_ctrl,
205 .parent = &clk_pclk_low.clk,
206 .enable = s5p64x0_pclk_ctrl,
210 .parent = &clk_pclk_low.clk,
211 .enable = s5p64x0_pclk_ctrl,
215 .parent = &clk_pclk_low.clk,
216 .enable = s5p64x0_pclk_ctrl,
220 .parent = &clk_pclk_low.clk,
221 .enable = s5p64x0_pclk_ctrl,
222 .ctrlbit = (1 << 12),
225 .parent = &clk_pclk_low.clk,
226 .enable = s5p64x0_pclk_ctrl,
227 .ctrlbit = (1 << 17),
230 .devname = "s5p64x0-spi.0",
231 .parent = &clk_pclk_low.clk,
232 .enable = s5p64x0_pclk_ctrl,
233 .ctrlbit = (1 << 21),
236 .devname = "s5p64x0-spi.1",
237 .parent = &clk_pclk_low.clk,
238 .enable = s5p64x0_pclk_ctrl,
239 .ctrlbit = (1 << 22),
242 .parent = &clk_pclk_low.clk,
243 .enable = s5p64x0_pclk_ctrl,
244 .ctrlbit = (1 << 25),
247 .parent = &clk_pclk_low.clk,
248 .enable = s5p64x0_pclk_ctrl,
249 .ctrlbit = (1 << 28),
252 .parent = &clk_pclk.clk,
253 .enable = s5p64x0_pclk_ctrl,
254 .ctrlbit = (1 << 29),
257 .parent = &clk_pclk.clk,
258 .enable = s5p64x0_pclk_ctrl,
259 .ctrlbit = (1 << 30),
261 .name = "pclk_fimgvg",
262 .parent = &clk_pclk.clk,
263 .enable = s5p64x0_pclk_ctrl,
264 .ctrlbit = (1 << 31),
267 .devname = "s3c-sdhci.0",
269 .enable = s5p64x0_sclk_ctrl,
270 .ctrlbit = (1 << 27),
273 .devname = "s3c-sdhci.1",
275 .enable = s5p64x0_sclk_ctrl,
276 .ctrlbit = (1 << 28),
279 .devname = "s3c-sdhci.2",
281 .enable = s5p64x0_sclk_ctrl,
282 .ctrlbit = (1 << 29),
287 * The following clocks will be enabled during clock initialization.
289 static struct clk init_clocks[] = {
292 .parent = &clk_hclk.clk,
293 .enable = s5p64x0_hclk0_ctrl,
297 .parent = &clk_hclk.clk,
298 .enable = s5p64x0_hclk0_ctrl,
299 .ctrlbit = (1 << 21),
302 .devname = "s3c6400-uart.0",
303 .parent = &clk_pclk_low.clk,
304 .enable = s5p64x0_pclk_ctrl,
308 .devname = "s3c6400-uart.1",
309 .parent = &clk_pclk_low.clk,
310 .enable = s5p64x0_pclk_ctrl,
314 .devname = "s3c6400-uart.2",
315 .parent = &clk_pclk_low.clk,
316 .enable = s5p64x0_pclk_ctrl,
320 .devname = "s3c6400-uart.3",
321 .parent = &clk_pclk_low.clk,
322 .enable = s5p64x0_pclk_ctrl,
326 .parent = &clk_pclk_low.clk,
327 .enable = s5p64x0_pclk_ctrl,
328 .ctrlbit = (1 << 18),
332 static struct clk clk_iis_cd_v40 = {
333 .name = "iis_cdclk_v40",
336 static struct clk clk_pcm_cd = {
340 static struct clk *clkset_group1_list[] = {
346 static struct clksrc_sources clkset_group1 = {
347 .sources = clkset_group1_list,
348 .nr_sources = ARRAY_SIZE(clkset_group1_list),
351 static struct clk *clkset_uart_list[] = {
356 static struct clksrc_sources clkset_uart = {
357 .sources = clkset_uart_list,
358 .nr_sources = ARRAY_SIZE(clkset_uart_list),
361 static struct clk *clkset_audio_list[] = {
369 static struct clksrc_sources clkset_audio = {
370 .sources = clkset_audio_list,
371 .nr_sources = ARRAY_SIZE(clkset_audio_list),
374 static struct clksrc_clk clksrcs[] = {
378 .ctrlbit = (1 << 10),
379 .enable = s5p64x0_sclk_ctrl,
381 .sources = &clkset_group1,
382 .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 26, .size = 2 },
383 .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 12, .size = 4 },
386 .name = "sclk_dispcon",
388 .enable = s5p64x0_sclk1_ctrl,
390 .sources = &clkset_group1,
391 .reg_src = { .reg = S5P64X0_CLK_SRC1, .shift = 4, .size = 2 },
392 .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 0, .size = 4 },
395 .name = "sclk_fimgvg",
397 .enable = s5p64x0_sclk1_ctrl,
399 .sources = &clkset_group1,
400 .reg_src = { .reg = S5P64X0_CLK_SRC1, .shift = 8, .size = 2 },
401 .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 4, .size = 4 },
405 static struct clksrc_clk clk_sclk_mmc0 = {
408 .devname = "s3c-sdhci.0",
409 .ctrlbit = (1 << 24),
410 .enable = s5p64x0_sclk_ctrl,
412 .sources = &clkset_group1,
413 .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 18, .size = 2 },
414 .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 0, .size = 4 },
417 static struct clksrc_clk clk_sclk_mmc1 = {
420 .devname = "s3c-sdhci.1",
421 .ctrlbit = (1 << 25),
422 .enable = s5p64x0_sclk_ctrl,
424 .sources = &clkset_group1,
425 .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 20, .size = 2 },
426 .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 4, .size = 4 },
429 static struct clksrc_clk clk_sclk_mmc2 = {
432 .devname = "s3c-sdhci.2",
433 .ctrlbit = (1 << 26),
434 .enable = s5p64x0_sclk_ctrl,
436 .sources = &clkset_group1,
437 .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 22, .size = 2 },
438 .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 8, .size = 4 },
441 static struct clksrc_clk clk_sclk_uclk = {
445 .enable = s5p64x0_sclk_ctrl,
447 .sources = &clkset_uart,
448 .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 13, .size = 1 },
449 .reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 16, .size = 4 },
452 static struct clk clk_i2s0 = {
454 .devname = "samsung-i2s.0",
455 .parent = &clk_pclk_low.clk,
456 .enable = s5p64x0_pclk_ctrl,
457 .ctrlbit = (1 << 26),
460 static struct clksrc_clk clk_audio_bus2 = {
462 .name = "sclk_audio2",
463 .devname = "samsung-i2s.0",
464 .ctrlbit = (1 << 11),
465 .enable = s5p64x0_sclk_ctrl,
467 .sources = &clkset_audio,
468 .reg_src = { .reg = S5P64X0_CLK_SRC1, .shift = 0, .size = 3 },
469 .reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 24, .size = 4 },
472 static struct clksrc_clk clk_sclk_spi0 = {
475 .devname = "s5p64x0-spi.0",
476 .ctrlbit = (1 << 20),
477 .enable = s5p64x0_sclk_ctrl,
479 .sources = &clkset_group1,
480 .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 14, .size = 2 },
481 .reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 0, .size = 4 },
484 static struct clksrc_clk clk_sclk_spi1 = {
487 .devname = "s5p64x0-spi.1",
488 .ctrlbit = (1 << 21),
489 .enable = s5p64x0_sclk_ctrl,
491 .sources = &clkset_group1,
492 .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 16, .size = 2 },
493 .reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 4, .size = 4 },
496 /* Clock initialization code */
497 static struct clksrc_clk *sysclks[] = {
509 static struct clk dummy_apb_pclk = {
514 static struct clk *clk_cdev[] = {
518 static struct clksrc_clk *clksrc_cdev[] = {
528 static struct clk_lookup s5p6440_clk_lookup[] = {
529 CLKDEV_INIT(NULL, "clk_uart_baud2", &clk_pclk_low.clk),
530 CLKDEV_INIT(NULL, "clk_uart_baud3", &clk_sclk_uclk.clk),
531 CLKDEV_INIT(NULL, "spi_busclk0", &clk_p),
532 CLKDEV_INIT("s5p64x0-spi.0", "spi_busclk1", &clk_sclk_spi0.clk),
533 CLKDEV_INIT("s5p64x0-spi.1", "spi_busclk1", &clk_sclk_spi1.clk),
534 CLKDEV_INIT("s3c-sdhci.0", "mmc_busclk.2", &clk_sclk_mmc0.clk),
535 CLKDEV_INIT("s3c-sdhci.1", "mmc_busclk.2", &clk_sclk_mmc1.clk),
536 CLKDEV_INIT("s3c-sdhci.2", "mmc_busclk.2", &clk_sclk_mmc2.clk),
537 CLKDEV_INIT("samsung-i2s.0", "i2s_opclk0", &clk_i2s0),
538 CLKDEV_INIT("samsung-i2s.0", "i2s_opclk1", &clk_audio_bus2.clk),
541 void __init_or_cpufreq s5p6440_setup_clocks(void)
543 struct clk *xtal_clk;
548 unsigned long hclk_low;
550 unsigned long pclk_low;
557 /* Set S5P6440 functions for clk_fout_epll */
559 clk_fout_epll.enable = s5p_epll_enable;
560 clk_fout_epll.ops = &s5p6440_epll_ops;
562 clk_48m.enable = s5p64x0_clk48m_ctrl;
564 xtal_clk = clk_get(NULL, "ext_xtal");
565 BUG_ON(IS_ERR(xtal_clk));
567 xtal = clk_get_rate(xtal_clk);
570 apll = s5p_get_pll45xx(xtal, __raw_readl(S5P64X0_APLL_CON), pll_4502);
571 mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P64X0_MPLL_CON), pll_4502);
572 epll = s5p_get_pll90xx(xtal, __raw_readl(S5P64X0_EPLL_CON),
573 __raw_readl(S5P64X0_EPLL_CON_K));
575 clk_fout_apll.rate = apll;
576 clk_fout_mpll.rate = mpll;
577 clk_fout_epll.rate = epll;
579 printk(KERN_INFO "S5P6440: PLL settings, A=%ld.%ldMHz, M=%ld.%ldMHz," \
581 print_mhz(apll), print_mhz(mpll), print_mhz(epll));
583 fclk = clk_get_rate(&clk_armclk.clk);
584 hclk = clk_get_rate(&clk_hclk.clk);
585 pclk = clk_get_rate(&clk_pclk.clk);
586 hclk_low = clk_get_rate(&clk_hclk_low.clk);
587 pclk_low = clk_get_rate(&clk_pclk_low.clk);
589 printk(KERN_INFO "S5P6440: HCLK=%ld.%ldMHz, HCLK_LOW=%ld.%ldMHz," \
590 " PCLK=%ld.%ldMHz, PCLK_LOW=%ld.%ldMHz\n",
591 print_mhz(hclk), print_mhz(hclk_low),
592 print_mhz(pclk), print_mhz(pclk_low));
598 for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
599 s3c_set_clksrc(&clksrcs[ptr], true);
602 static struct clk *clks[] __initdata = {
608 void __init s5p6440_register_clocks(void)
613 s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
615 for (ptr = 0; ptr < ARRAY_SIZE(sysclks); ptr++)
616 s3c_register_clksrc(sysclks[ptr], 1);
618 s3c24xx_register_clocks(clk_cdev, ARRAY_SIZE(clk_cdev));
619 for (cnt = 0; cnt < ARRAY_SIZE(clk_cdev); cnt++)
620 s3c_disable_clocks(clk_cdev[cnt], 1);
622 s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
623 s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
624 for (ptr = 0; ptr < ARRAY_SIZE(clksrc_cdev); ptr++)
625 s3c_register_clksrc(clksrc_cdev[ptr], 1);
627 s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
628 s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
629 clkdev_add_table(s5p6440_clk_lookup, ARRAY_SIZE(s5p6440_clk_lookup));
631 s3c24xx_register_clock(&dummy_apb_pclk);