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8bd22949 KH |
1 | /* |
2 | * OMAP2 Power Management Routines | |
3 | * | |
4 | * Copyright (C) 2005 Texas Instruments, Inc. | |
5 | * Copyright (C) 2006-2008 Nokia Corporation | |
6 | * | |
7 | * Written by: | |
8 | * Richard Woodruff <r-woodruff2@ti.com> | |
9 | * Tony Lindgren | |
10 | * Juha Yrjola | |
11 | * Amit Kucheria <amit.kucheria@nokia.com> | |
12 | * Igor Stoppa <igor.stoppa@nokia.com> | |
13 | * | |
14 | * Based on pm.c for omap1 | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License version 2 as | |
18 | * published by the Free Software Foundation. | |
19 | */ | |
20 | ||
21 | #include <linux/suspend.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/proc_fs.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/sysfs.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/clk.h> | |
29 | #include <linux/io.h> | |
30 | #include <linux/irq.h> | |
31 | #include <linux/time.h> | |
32 | #include <linux/gpio.h> | |
33 | ||
34 | #include <asm/mach/time.h> | |
35 | #include <asm/mach/irq.h> | |
36 | #include <asm/mach-types.h> | |
37 | ||
38 | #include <mach/irqs.h> | |
ce491cf8 TL |
39 | #include <plat/clock.h> |
40 | #include <plat/sram.h> | |
41 | #include <plat/control.h> | |
42 | #include <plat/mux.h> | |
43 | #include <plat/dma.h> | |
44 | #include <plat/board.h> | |
8bd22949 KH |
45 | |
46 | #include "prm.h" | |
47 | #include "prm-regbits-24xx.h" | |
48 | #include "cm.h" | |
49 | #include "cm-regbits-24xx.h" | |
50 | #include "sdrc.h" | |
51 | #include "pm.h" | |
52 | ||
ce491cf8 TL |
53 | #include <plat/powerdomain.h> |
54 | #include <plat/clockdomain.h> | |
8bd22949 KH |
55 | |
56 | static void (*omap2_sram_idle)(void); | |
57 | static void (*omap2_sram_suspend)(u32 dllctrl, void __iomem *sdrc_dlla_ctrl, | |
58 | void __iomem *sdrc_power); | |
59 | ||
369d5614 PW |
60 | static struct powerdomain *mpu_pwrdm, *core_pwrdm; |
61 | static struct clockdomain *dsp_clkdm, *mpu_clkdm, *wkup_clkdm, *gfx_clkdm; | |
8bd22949 KH |
62 | |
63 | static struct clk *osc_ck, *emul_ck; | |
64 | ||
65 | static int omap2_fclks_active(void) | |
66 | { | |
67 | u32 f1, f2; | |
68 | ||
69 | f1 = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1); | |
70 | f2 = cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2); | |
4af4016c KH |
71 | |
72 | /* Ignore UART clocks. These are handled by UART core (serial.c) */ | |
73 | f1 &= ~(OMAP24XX_EN_UART1 | OMAP24XX_EN_UART2); | |
74 | f2 &= ~OMAP24XX_EN_UART3; | |
75 | ||
8bd22949 KH |
76 | if (f1 | f2) |
77 | return 1; | |
78 | return 0; | |
79 | } | |
80 | ||
8bd22949 KH |
81 | static void omap2_enter_full_retention(void) |
82 | { | |
83 | u32 l; | |
84 | struct timespec ts_preidle, ts_postidle, ts_idle; | |
85 | ||
86 | /* There is 1 reference hold for all children of the oscillator | |
87 | * clock, the following will remove it. If no one else uses the | |
88 | * oscillator itself it will be disabled if/when we enter retention | |
89 | * mode. | |
90 | */ | |
91 | clk_disable(osc_ck); | |
92 | ||
93 | /* Clear old wake-up events */ | |
94 | /* REVISIT: These write to reserved bits? */ | |
95 | prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1); | |
96 | prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2); | |
97 | prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST); | |
98 | ||
99 | /* | |
100 | * Set MPU powerdomain's next power state to RETENTION; | |
101 | * preserve logic state during retention | |
102 | */ | |
103 | pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET); | |
104 | pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET); | |
105 | ||
106 | /* Workaround to kill USB */ | |
107 | l = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0) | OMAP24XX_USBSTANDBYCTRL; | |
108 | omap_ctrl_writel(l, OMAP2_CONTROL_DEVCONF0); | |
109 | ||
110 | omap2_gpio_prepare_for_retention(); | |
111 | ||
112 | if (omap2_pm_debug) { | |
113 | omap2_pm_dump(0, 0, 0); | |
114 | getnstimeofday(&ts_preidle); | |
115 | } | |
116 | ||
117 | /* One last check for pending IRQs to avoid extra latency due | |
118 | * to sleeping unnecessarily. */ | |
94434535 | 119 | if (omap_irq_pending()) |
8bd22949 KH |
120 | goto no_sleep; |
121 | ||
4af4016c KH |
122 | omap_uart_prepare_idle(0); |
123 | omap_uart_prepare_idle(1); | |
124 | omap_uart_prepare_idle(2); | |
125 | ||
8bd22949 KH |
126 | /* Jump to SRAM suspend code */ |
127 | omap2_sram_suspend(sdrc_read_reg(SDRC_DLLA_CTRL), | |
128 | OMAP_SDRC_REGADDR(SDRC_DLLA_CTRL), | |
129 | OMAP_SDRC_REGADDR(SDRC_POWER)); | |
8bd22949 | 130 | |
4af4016c KH |
131 | omap_uart_resume_idle(2); |
132 | omap_uart_resume_idle(1); | |
133 | omap_uart_resume_idle(0); | |
134 | ||
135 | no_sleep: | |
8bd22949 KH |
136 | if (omap2_pm_debug) { |
137 | unsigned long long tmp; | |
138 | ||
139 | getnstimeofday(&ts_postidle); | |
140 | ts_idle = timespec_sub(ts_postidle, ts_preidle); | |
141 | tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC; | |
142 | omap2_pm_dump(0, 1, tmp); | |
143 | } | |
144 | omap2_gpio_resume_after_retention(); | |
145 | ||
146 | clk_enable(osc_ck); | |
147 | ||
148 | /* clear CORE wake-up events */ | |
149 | prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1); | |
150 | prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2); | |
151 | ||
152 | /* wakeup domain events - bit 1: GPT1, bit5 GPIO */ | |
153 | prm_clear_mod_reg_bits(0x4 | 0x1, WKUP_MOD, PM_WKST); | |
154 | ||
155 | /* MPU domain wake events */ | |
156 | l = prm_read_mod_reg(OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); | |
157 | if (l & 0x01) | |
158 | prm_write_mod_reg(0x01, OCP_MOD, | |
159 | OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); | |
160 | if (l & 0x20) | |
161 | prm_write_mod_reg(0x20, OCP_MOD, | |
162 | OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); | |
163 | ||
164 | /* Mask future PRCM-to-MPU interrupts */ | |
165 | prm_write_mod_reg(0x0, OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); | |
166 | } | |
167 | ||
168 | static int omap2_i2c_active(void) | |
169 | { | |
170 | u32 l; | |
171 | ||
172 | l = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1); | |
173 | return l & (OMAP2420_EN_I2C2 | OMAP2420_EN_I2C1); | |
174 | } | |
175 | ||
176 | static int sti_console_enabled; | |
177 | ||
178 | static int omap2_allow_mpu_retention(void) | |
179 | { | |
180 | u32 l; | |
181 | ||
182 | /* Check for MMC, UART2, UART1, McSPI2, McSPI1 and DSS1. */ | |
183 | l = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1); | |
184 | if (l & (OMAP2420_EN_MMC | OMAP24XX_EN_UART2 | | |
185 | OMAP24XX_EN_UART1 | OMAP24XX_EN_MCSPI2 | | |
186 | OMAP24XX_EN_MCSPI1 | OMAP24XX_EN_DSS1)) | |
187 | return 0; | |
188 | /* Check for UART3. */ | |
189 | l = cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2); | |
190 | if (l & OMAP24XX_EN_UART3) | |
191 | return 0; | |
192 | if (sti_console_enabled) | |
193 | return 0; | |
194 | ||
195 | return 1; | |
196 | } | |
197 | ||
198 | static void omap2_enter_mpu_retention(void) | |
199 | { | |
200 | int only_idle = 0; | |
201 | struct timespec ts_preidle, ts_postidle, ts_idle; | |
202 | ||
203 | /* Putting MPU into the WFI state while a transfer is active | |
204 | * seems to cause the I2C block to timeout. Why? Good question. */ | |
205 | if (omap2_i2c_active()) | |
206 | return; | |
207 | ||
208 | /* The peripherals seem not to be able to wake up the MPU when | |
209 | * it is in retention mode. */ | |
210 | if (omap2_allow_mpu_retention()) { | |
211 | /* REVISIT: These write to reserved bits? */ | |
212 | prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1); | |
213 | prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2); | |
214 | prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST); | |
215 | ||
216 | /* Try to enter MPU retention */ | |
217 | prm_write_mod_reg((0x01 << OMAP_POWERSTATE_SHIFT) | | |
218 | OMAP_LOGICRETSTATE, | |
37903009 | 219 | MPU_MOD, OMAP2_PM_PWSTCTRL); |
8bd22949 KH |
220 | } else { |
221 | /* Block MPU retention */ | |
222 | ||
37903009 AP |
223 | prm_write_mod_reg(OMAP_LOGICRETSTATE, MPU_MOD, |
224 | OMAP2_PM_PWSTCTRL); | |
8bd22949 KH |
225 | only_idle = 1; |
226 | } | |
227 | ||
228 | if (omap2_pm_debug) { | |
229 | omap2_pm_dump(only_idle ? 2 : 1, 0, 0); | |
230 | getnstimeofday(&ts_preidle); | |
231 | } | |
232 | ||
233 | omap2_sram_idle(); | |
234 | ||
235 | if (omap2_pm_debug) { | |
236 | unsigned long long tmp; | |
237 | ||
238 | getnstimeofday(&ts_postidle); | |
239 | ts_idle = timespec_sub(ts_postidle, ts_preidle); | |
240 | tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC; | |
241 | omap2_pm_dump(only_idle ? 2 : 1, 1, tmp); | |
242 | } | |
243 | } | |
244 | ||
245 | static int omap2_can_sleep(void) | |
246 | { | |
247 | if (omap2_fclks_active()) | |
248 | return 0; | |
249 | if (osc_ck->usecount > 1) | |
250 | return 0; | |
251 | if (omap_dma_running()) | |
252 | return 0; | |
253 | ||
254 | return 1; | |
255 | } | |
256 | ||
257 | static void omap2_pm_idle(void) | |
258 | { | |
259 | local_irq_disable(); | |
260 | local_fiq_disable(); | |
261 | ||
262 | if (!omap2_can_sleep()) { | |
94434535 | 263 | if (omap_irq_pending()) |
8bd22949 KH |
264 | goto out; |
265 | omap2_enter_mpu_retention(); | |
266 | goto out; | |
267 | } | |
268 | ||
94434535 | 269 | if (omap_irq_pending()) |
8bd22949 KH |
270 | goto out; |
271 | ||
272 | omap2_enter_full_retention(); | |
273 | ||
274 | out: | |
275 | local_fiq_enable(); | |
276 | local_irq_enable(); | |
277 | } | |
278 | ||
279 | static int omap2_pm_prepare(void) | |
280 | { | |
281 | /* We cannot sleep in idle until we have resumed */ | |
282 | disable_hlt(); | |
283 | return 0; | |
284 | } | |
285 | ||
286 | static int omap2_pm_suspend(void) | |
287 | { | |
288 | u32 wken_wkup, mir1; | |
289 | ||
290 | wken_wkup = prm_read_mod_reg(WKUP_MOD, PM_WKEN); | |
291 | prm_write_mod_reg(wken_wkup & ~OMAP24XX_EN_GPT1, WKUP_MOD, PM_WKEN); | |
292 | ||
293 | /* Mask GPT1 */ | |
294 | mir1 = omap_readl(0x480fe0a4); | |
295 | omap_writel(1 << 5, 0x480fe0ac); | |
296 | ||
4af4016c | 297 | omap_uart_prepare_suspend(); |
8bd22949 KH |
298 | omap2_enter_full_retention(); |
299 | ||
300 | omap_writel(mir1, 0x480fe0a4); | |
301 | prm_write_mod_reg(wken_wkup, WKUP_MOD, PM_WKEN); | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | static int omap2_pm_enter(suspend_state_t state) | |
307 | { | |
308 | int ret = 0; | |
309 | ||
310 | switch (state) { | |
311 | case PM_SUSPEND_STANDBY: | |
312 | case PM_SUSPEND_MEM: | |
313 | ret = omap2_pm_suspend(); | |
314 | break; | |
315 | default: | |
316 | ret = -EINVAL; | |
317 | } | |
318 | ||
319 | return ret; | |
320 | } | |
321 | ||
322 | static void omap2_pm_finish(void) | |
323 | { | |
324 | enable_hlt(); | |
325 | } | |
326 | ||
327 | static struct platform_suspend_ops omap_pm_ops = { | |
328 | .prepare = omap2_pm_prepare, | |
329 | .enter = omap2_pm_enter, | |
330 | .finish = omap2_pm_finish, | |
331 | .valid = suspend_valid_only_mem, | |
332 | }; | |
333 | ||
369d5614 PW |
334 | /* XXX This function should be shareable between OMAP2xxx and OMAP3 */ |
335 | static int __init clkdms_setup(struct clockdomain *clkdm, void *unused) | |
8bd22949 | 336 | { |
369d5614 PW |
337 | clkdm_clear_all_wkdeps(clkdm); |
338 | clkdm_clear_all_sleepdeps(clkdm); | |
339 | ||
340 | if (clkdm->flags & CLKDM_CAN_ENABLE_AUTO) | |
341 | omap2_clkdm_allow_idle(clkdm); | |
342 | else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP && | |
343 | atomic_read(&clkdm->usecount) == 0) | |
344 | omap2_clkdm_sleep(clkdm); | |
8bd22949 KH |
345 | return 0; |
346 | } | |
347 | ||
348 | static void __init prcm_setup_regs(void) | |
349 | { | |
350 | int i, num_mem_banks; | |
351 | struct powerdomain *pwrdm; | |
352 | ||
353 | /* Enable autoidle */ | |
354 | prm_write_mod_reg(OMAP24XX_AUTOIDLE, OCP_MOD, | |
355 | OMAP2_PRCM_SYSCONFIG_OFFSET); | |
356 | ||
8bd22949 KH |
357 | /* |
358 | * Set CORE powerdomain memory banks to retain their contents | |
359 | * during RETENTION | |
360 | */ | |
361 | num_mem_banks = pwrdm_get_mem_bank_count(core_pwrdm); | |
362 | for (i = 0; i < num_mem_banks; i++) | |
363 | pwrdm_set_mem_retst(core_pwrdm, i, PWRDM_POWER_RET); | |
364 | ||
365 | /* Set CORE powerdomain's next power state to RETENTION */ | |
366 | pwrdm_set_next_pwrst(core_pwrdm, PWRDM_POWER_RET); | |
367 | ||
368 | /* | |
369 | * Set MPU powerdomain's next power state to RETENTION; | |
370 | * preserve logic state during retention | |
371 | */ | |
372 | pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET); | |
373 | pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET); | |
374 | ||
375 | /* Force-power down DSP, GFX powerdomains */ | |
376 | ||
377 | pwrdm = clkdm_get_pwrdm(dsp_clkdm); | |
378 | pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_OFF); | |
379 | omap2_clkdm_sleep(dsp_clkdm); | |
380 | ||
381 | pwrdm = clkdm_get_pwrdm(gfx_clkdm); | |
382 | pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_OFF); | |
383 | omap2_clkdm_sleep(gfx_clkdm); | |
384 | ||
369d5614 PW |
385 | /* |
386 | * Clear clockdomain wakeup dependencies and enable | |
387 | * hardware-supervised idle for all clkdms | |
388 | */ | |
389 | clkdm_for_each(clkdms_setup, NULL); | |
390 | clkdm_add_wkdep(mpu_clkdm, wkup_clkdm); | |
8bd22949 KH |
391 | |
392 | /* Enable clock autoidle for all domains */ | |
393 | cm_write_mod_reg(OMAP24XX_AUTO_CAM | | |
394 | OMAP24XX_AUTO_MAILBOXES | | |
395 | OMAP24XX_AUTO_WDT4 | | |
396 | OMAP2420_AUTO_WDT3 | | |
397 | OMAP24XX_AUTO_MSPRO | | |
398 | OMAP2420_AUTO_MMC | | |
399 | OMAP24XX_AUTO_FAC | | |
400 | OMAP2420_AUTO_EAC | | |
401 | OMAP24XX_AUTO_HDQ | | |
402 | OMAP24XX_AUTO_UART2 | | |
403 | OMAP24XX_AUTO_UART1 | | |
404 | OMAP24XX_AUTO_I2C2 | | |
405 | OMAP24XX_AUTO_I2C1 | | |
406 | OMAP24XX_AUTO_MCSPI2 | | |
407 | OMAP24XX_AUTO_MCSPI1 | | |
408 | OMAP24XX_AUTO_MCBSP2 | | |
409 | OMAP24XX_AUTO_MCBSP1 | | |
410 | OMAP24XX_AUTO_GPT12 | | |
411 | OMAP24XX_AUTO_GPT11 | | |
412 | OMAP24XX_AUTO_GPT10 | | |
413 | OMAP24XX_AUTO_GPT9 | | |
414 | OMAP24XX_AUTO_GPT8 | | |
415 | OMAP24XX_AUTO_GPT7 | | |
416 | OMAP24XX_AUTO_GPT6 | | |
417 | OMAP24XX_AUTO_GPT5 | | |
418 | OMAP24XX_AUTO_GPT4 | | |
419 | OMAP24XX_AUTO_GPT3 | | |
420 | OMAP24XX_AUTO_GPT2 | | |
421 | OMAP2420_AUTO_VLYNQ | | |
422 | OMAP24XX_AUTO_DSS, | |
423 | CORE_MOD, CM_AUTOIDLE1); | |
424 | cm_write_mod_reg(OMAP24XX_AUTO_UART3 | | |
425 | OMAP24XX_AUTO_SSI | | |
426 | OMAP24XX_AUTO_USB, | |
427 | CORE_MOD, CM_AUTOIDLE2); | |
428 | cm_write_mod_reg(OMAP24XX_AUTO_SDRC | | |
429 | OMAP24XX_AUTO_GPMC | | |
430 | OMAP24XX_AUTO_SDMA, | |
431 | CORE_MOD, CM_AUTOIDLE3); | |
432 | cm_write_mod_reg(OMAP24XX_AUTO_PKA | | |
433 | OMAP24XX_AUTO_AES | | |
434 | OMAP24XX_AUTO_RNG | | |
435 | OMAP24XX_AUTO_SHA | | |
436 | OMAP24XX_AUTO_DES, | |
437 | CORE_MOD, OMAP24XX_CM_AUTOIDLE4); | |
438 | ||
439 | cm_write_mod_reg(OMAP2420_AUTO_DSP_IPI, OMAP24XX_DSP_MOD, CM_AUTOIDLE); | |
440 | ||
441 | /* Put DPLL and both APLLs into autoidle mode */ | |
442 | cm_write_mod_reg((0x03 << OMAP24XX_AUTO_DPLL_SHIFT) | | |
443 | (0x03 << OMAP24XX_AUTO_96M_SHIFT) | | |
444 | (0x03 << OMAP24XX_AUTO_54M_SHIFT), | |
445 | PLL_MOD, CM_AUTOIDLE); | |
446 | ||
447 | cm_write_mod_reg(OMAP24XX_AUTO_OMAPCTRL | | |
448 | OMAP24XX_AUTO_WDT1 | | |
449 | OMAP24XX_AUTO_MPU_WDT | | |
450 | OMAP24XX_AUTO_GPIOS | | |
451 | OMAP24XX_AUTO_32KSYNC | | |
452 | OMAP24XX_AUTO_GPT1, | |
453 | WKUP_MOD, CM_AUTOIDLE); | |
454 | ||
455 | /* REVISIT: Configure number of 32 kHz clock cycles for sys_clk | |
456 | * stabilisation */ | |
457 | prm_write_mod_reg(15 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD, | |
458 | OMAP2_PRCM_CLKSSETUP_OFFSET); | |
459 | ||
460 | /* Configure automatic voltage transition */ | |
461 | prm_write_mod_reg(2 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD, | |
462 | OMAP2_PRCM_VOLTSETUP_OFFSET); | |
463 | prm_write_mod_reg(OMAP24XX_AUTO_EXTVOLT | | |
464 | (0x1 << OMAP24XX_SETOFF_LEVEL_SHIFT) | | |
465 | OMAP24XX_MEMRETCTRL | | |
466 | (0x1 << OMAP24XX_SETRET_LEVEL_SHIFT) | | |
467 | (0x0 << OMAP24XX_VOLT_LEVEL_SHIFT), | |
468 | OMAP24XX_GR_MOD, OMAP2_PRCM_VOLTCTRL_OFFSET); | |
469 | ||
470 | /* Enable wake-up events */ | |
471 | prm_write_mod_reg(OMAP24XX_EN_GPIOS | OMAP24XX_EN_GPT1, | |
472 | WKUP_MOD, PM_WKEN); | |
473 | } | |
474 | ||
7cc515f7 | 475 | static int __init omap2_pm_init(void) |
8bd22949 KH |
476 | { |
477 | u32 l; | |
478 | ||
479 | if (!cpu_is_omap24xx()) | |
480 | return -ENODEV; | |
481 | ||
482 | printk(KERN_INFO "Power Management for OMAP2 initializing\n"); | |
483 | l = prm_read_mod_reg(OCP_MOD, OMAP2_PRCM_REVISION_OFFSET); | |
484 | printk(KERN_INFO "PRCM revision %d.%d\n", (l >> 4) & 0x0f, l & 0x0f); | |
485 | ||
369d5614 | 486 | /* Look up important powerdomains */ |
8bd22949 KH |
487 | |
488 | mpu_pwrdm = pwrdm_lookup("mpu_pwrdm"); | |
489 | if (!mpu_pwrdm) | |
490 | pr_err("PM: mpu_pwrdm not found\n"); | |
491 | ||
492 | core_pwrdm = pwrdm_lookup("core_pwrdm"); | |
493 | if (!core_pwrdm) | |
494 | pr_err("PM: core_pwrdm not found\n"); | |
495 | ||
369d5614 PW |
496 | /* Look up important clockdomains */ |
497 | ||
498 | mpu_clkdm = clkdm_lookup("mpu_clkdm"); | |
499 | if (!mpu_clkdm) | |
500 | pr_err("PM: mpu_clkdm not found\n"); | |
501 | ||
502 | wkup_clkdm = clkdm_lookup("wkup_clkdm"); | |
503 | if (!wkup_clkdm) | |
504 | pr_err("PM: wkup_clkdm not found\n"); | |
505 | ||
8bd22949 KH |
506 | dsp_clkdm = clkdm_lookup("dsp_clkdm"); |
507 | if (!dsp_clkdm) | |
369d5614 | 508 | pr_err("PM: dsp_clkdm not found\n"); |
8bd22949 KH |
509 | |
510 | gfx_clkdm = clkdm_lookup("gfx_clkdm"); | |
511 | if (!gfx_clkdm) | |
512 | pr_err("PM: gfx_clkdm not found\n"); | |
513 | ||
514 | ||
515 | osc_ck = clk_get(NULL, "osc_ck"); | |
516 | if (IS_ERR(osc_ck)) { | |
517 | printk(KERN_ERR "could not get osc_ck\n"); | |
518 | return -ENODEV; | |
519 | } | |
520 | ||
521 | if (cpu_is_omap242x()) { | |
522 | emul_ck = clk_get(NULL, "emul_ck"); | |
523 | if (IS_ERR(emul_ck)) { | |
524 | printk(KERN_ERR "could not get emul_ck\n"); | |
525 | clk_put(osc_ck); | |
526 | return -ENODEV; | |
527 | } | |
528 | } | |
529 | ||
530 | prcm_setup_regs(); | |
531 | ||
532 | /* Hack to prevent MPU retention when STI console is enabled. */ | |
533 | { | |
534 | const struct omap_sti_console_config *sti; | |
535 | ||
536 | sti = omap_get_config(OMAP_TAG_STI_CONSOLE, | |
537 | struct omap_sti_console_config); | |
538 | if (sti != NULL && sti->enable) | |
539 | sti_console_enabled = 1; | |
540 | } | |
541 | ||
542 | /* | |
543 | * We copy the assembler sleep/wakeup routines to SRAM. | |
544 | * These routines need to be in SRAM as that's the only | |
545 | * memory the MPU can see when it wakes up. | |
546 | */ | |
547 | if (cpu_is_omap24xx()) { | |
548 | omap2_sram_idle = omap_sram_push(omap24xx_idle_loop_suspend, | |
549 | omap24xx_idle_loop_suspend_sz); | |
550 | ||
551 | omap2_sram_suspend = omap_sram_push(omap24xx_cpu_suspend, | |
552 | omap24xx_cpu_suspend_sz); | |
553 | } | |
554 | ||
555 | suspend_set_ops(&omap_pm_ops); | |
556 | pm_idle = omap2_pm_idle; | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
561 | late_initcall(omap2_pm_init); |