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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 | ||
60 | static struct powerdomain *mpu_pwrdm; | |
61 | static struct powerdomain *core_pwrdm; | |
62 | ||
63 | static struct clockdomain *dsp_clkdm; | |
64 | static struct clockdomain *gfx_clkdm; | |
65 | ||
66 | static struct clk *osc_ck, *emul_ck; | |
67 | ||
68 | static int omap2_fclks_active(void) | |
69 | { | |
70 | u32 f1, f2; | |
71 | ||
72 | f1 = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1); | |
73 | f2 = cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2); | |
4af4016c KH |
74 | |
75 | /* Ignore UART clocks. These are handled by UART core (serial.c) */ | |
76 | f1 &= ~(OMAP24XX_EN_UART1 | OMAP24XX_EN_UART2); | |
77 | f2 &= ~OMAP24XX_EN_UART3; | |
78 | ||
8bd22949 KH |
79 | if (f1 | f2) |
80 | return 1; | |
81 | return 0; | |
82 | } | |
83 | ||
8bd22949 KH |
84 | static void omap2_enter_full_retention(void) |
85 | { | |
86 | u32 l; | |
87 | struct timespec ts_preidle, ts_postidle, ts_idle; | |
88 | ||
89 | /* There is 1 reference hold for all children of the oscillator | |
90 | * clock, the following will remove it. If no one else uses the | |
91 | * oscillator itself it will be disabled if/when we enter retention | |
92 | * mode. | |
93 | */ | |
94 | clk_disable(osc_ck); | |
95 | ||
96 | /* Clear old wake-up events */ | |
97 | /* REVISIT: These write to reserved bits? */ | |
98 | prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1); | |
99 | prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2); | |
100 | prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST); | |
101 | ||
102 | /* | |
103 | * Set MPU powerdomain's next power state to RETENTION; | |
104 | * preserve logic state during retention | |
105 | */ | |
106 | pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET); | |
107 | pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET); | |
108 | ||
109 | /* Workaround to kill USB */ | |
110 | l = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0) | OMAP24XX_USBSTANDBYCTRL; | |
111 | omap_ctrl_writel(l, OMAP2_CONTROL_DEVCONF0); | |
112 | ||
113 | omap2_gpio_prepare_for_retention(); | |
114 | ||
115 | if (omap2_pm_debug) { | |
116 | omap2_pm_dump(0, 0, 0); | |
117 | getnstimeofday(&ts_preidle); | |
118 | } | |
119 | ||
120 | /* One last check for pending IRQs to avoid extra latency due | |
121 | * to sleeping unnecessarily. */ | |
94434535 | 122 | if (omap_irq_pending()) |
8bd22949 KH |
123 | goto no_sleep; |
124 | ||
4af4016c KH |
125 | omap_uart_prepare_idle(0); |
126 | omap_uart_prepare_idle(1); | |
127 | omap_uart_prepare_idle(2); | |
128 | ||
8bd22949 KH |
129 | /* Jump to SRAM suspend code */ |
130 | omap2_sram_suspend(sdrc_read_reg(SDRC_DLLA_CTRL), | |
131 | OMAP_SDRC_REGADDR(SDRC_DLLA_CTRL), | |
132 | OMAP_SDRC_REGADDR(SDRC_POWER)); | |
8bd22949 | 133 | |
4af4016c KH |
134 | omap_uart_resume_idle(2); |
135 | omap_uart_resume_idle(1); | |
136 | omap_uart_resume_idle(0); | |
137 | ||
138 | no_sleep: | |
8bd22949 KH |
139 | if (omap2_pm_debug) { |
140 | unsigned long long tmp; | |
141 | ||
142 | getnstimeofday(&ts_postidle); | |
143 | ts_idle = timespec_sub(ts_postidle, ts_preidle); | |
144 | tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC; | |
145 | omap2_pm_dump(0, 1, tmp); | |
146 | } | |
147 | omap2_gpio_resume_after_retention(); | |
148 | ||
149 | clk_enable(osc_ck); | |
150 | ||
151 | /* clear CORE wake-up events */ | |
152 | prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1); | |
153 | prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2); | |
154 | ||
155 | /* wakeup domain events - bit 1: GPT1, bit5 GPIO */ | |
156 | prm_clear_mod_reg_bits(0x4 | 0x1, WKUP_MOD, PM_WKST); | |
157 | ||
158 | /* MPU domain wake events */ | |
159 | l = prm_read_mod_reg(OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); | |
160 | if (l & 0x01) | |
161 | prm_write_mod_reg(0x01, OCP_MOD, | |
162 | OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); | |
163 | if (l & 0x20) | |
164 | prm_write_mod_reg(0x20, OCP_MOD, | |
165 | OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); | |
166 | ||
167 | /* Mask future PRCM-to-MPU interrupts */ | |
168 | prm_write_mod_reg(0x0, OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); | |
169 | } | |
170 | ||
171 | static int omap2_i2c_active(void) | |
172 | { | |
173 | u32 l; | |
174 | ||
175 | l = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1); | |
176 | return l & (OMAP2420_EN_I2C2 | OMAP2420_EN_I2C1); | |
177 | } | |
178 | ||
179 | static int sti_console_enabled; | |
180 | ||
181 | static int omap2_allow_mpu_retention(void) | |
182 | { | |
183 | u32 l; | |
184 | ||
185 | /* Check for MMC, UART2, UART1, McSPI2, McSPI1 and DSS1. */ | |
186 | l = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1); | |
187 | if (l & (OMAP2420_EN_MMC | OMAP24XX_EN_UART2 | | |
188 | OMAP24XX_EN_UART1 | OMAP24XX_EN_MCSPI2 | | |
189 | OMAP24XX_EN_MCSPI1 | OMAP24XX_EN_DSS1)) | |
190 | return 0; | |
191 | /* Check for UART3. */ | |
192 | l = cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2); | |
193 | if (l & OMAP24XX_EN_UART3) | |
194 | return 0; | |
195 | if (sti_console_enabled) | |
196 | return 0; | |
197 | ||
198 | return 1; | |
199 | } | |
200 | ||
201 | static void omap2_enter_mpu_retention(void) | |
202 | { | |
203 | int only_idle = 0; | |
204 | struct timespec ts_preidle, ts_postidle, ts_idle; | |
205 | ||
206 | /* Putting MPU into the WFI state while a transfer is active | |
207 | * seems to cause the I2C block to timeout. Why? Good question. */ | |
208 | if (omap2_i2c_active()) | |
209 | return; | |
210 | ||
211 | /* The peripherals seem not to be able to wake up the MPU when | |
212 | * it is in retention mode. */ | |
213 | if (omap2_allow_mpu_retention()) { | |
214 | /* REVISIT: These write to reserved bits? */ | |
215 | prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1); | |
216 | prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2); | |
217 | prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST); | |
218 | ||
219 | /* Try to enter MPU retention */ | |
220 | prm_write_mod_reg((0x01 << OMAP_POWERSTATE_SHIFT) | | |
221 | OMAP_LOGICRETSTATE, | |
37903009 | 222 | MPU_MOD, OMAP2_PM_PWSTCTRL); |
8bd22949 KH |
223 | } else { |
224 | /* Block MPU retention */ | |
225 | ||
37903009 AP |
226 | prm_write_mod_reg(OMAP_LOGICRETSTATE, MPU_MOD, |
227 | OMAP2_PM_PWSTCTRL); | |
8bd22949 KH |
228 | only_idle = 1; |
229 | } | |
230 | ||
231 | if (omap2_pm_debug) { | |
232 | omap2_pm_dump(only_idle ? 2 : 1, 0, 0); | |
233 | getnstimeofday(&ts_preidle); | |
234 | } | |
235 | ||
236 | omap2_sram_idle(); | |
237 | ||
238 | if (omap2_pm_debug) { | |
239 | unsigned long long tmp; | |
240 | ||
241 | getnstimeofday(&ts_postidle); | |
242 | ts_idle = timespec_sub(ts_postidle, ts_preidle); | |
243 | tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC; | |
244 | omap2_pm_dump(only_idle ? 2 : 1, 1, tmp); | |
245 | } | |
246 | } | |
247 | ||
248 | static int omap2_can_sleep(void) | |
249 | { | |
250 | if (omap2_fclks_active()) | |
251 | return 0; | |
252 | if (osc_ck->usecount > 1) | |
253 | return 0; | |
254 | if (omap_dma_running()) | |
255 | return 0; | |
256 | ||
257 | return 1; | |
258 | } | |
259 | ||
260 | static void omap2_pm_idle(void) | |
261 | { | |
262 | local_irq_disable(); | |
263 | local_fiq_disable(); | |
264 | ||
265 | if (!omap2_can_sleep()) { | |
94434535 | 266 | if (omap_irq_pending()) |
8bd22949 KH |
267 | goto out; |
268 | omap2_enter_mpu_retention(); | |
269 | goto out; | |
270 | } | |
271 | ||
94434535 | 272 | if (omap_irq_pending()) |
8bd22949 KH |
273 | goto out; |
274 | ||
275 | omap2_enter_full_retention(); | |
276 | ||
277 | out: | |
278 | local_fiq_enable(); | |
279 | local_irq_enable(); | |
280 | } | |
281 | ||
282 | static int omap2_pm_prepare(void) | |
283 | { | |
284 | /* We cannot sleep in idle until we have resumed */ | |
285 | disable_hlt(); | |
286 | return 0; | |
287 | } | |
288 | ||
289 | static int omap2_pm_suspend(void) | |
290 | { | |
291 | u32 wken_wkup, mir1; | |
292 | ||
293 | wken_wkup = prm_read_mod_reg(WKUP_MOD, PM_WKEN); | |
294 | prm_write_mod_reg(wken_wkup & ~OMAP24XX_EN_GPT1, WKUP_MOD, PM_WKEN); | |
295 | ||
296 | /* Mask GPT1 */ | |
297 | mir1 = omap_readl(0x480fe0a4); | |
298 | omap_writel(1 << 5, 0x480fe0ac); | |
299 | ||
4af4016c | 300 | omap_uart_prepare_suspend(); |
8bd22949 KH |
301 | omap2_enter_full_retention(); |
302 | ||
303 | omap_writel(mir1, 0x480fe0a4); | |
304 | prm_write_mod_reg(wken_wkup, WKUP_MOD, PM_WKEN); | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | static int omap2_pm_enter(suspend_state_t state) | |
310 | { | |
311 | int ret = 0; | |
312 | ||
313 | switch (state) { | |
314 | case PM_SUSPEND_STANDBY: | |
315 | case PM_SUSPEND_MEM: | |
316 | ret = omap2_pm_suspend(); | |
317 | break; | |
318 | default: | |
319 | ret = -EINVAL; | |
320 | } | |
321 | ||
322 | return ret; | |
323 | } | |
324 | ||
325 | static void omap2_pm_finish(void) | |
326 | { | |
327 | enable_hlt(); | |
328 | } | |
329 | ||
330 | static struct platform_suspend_ops omap_pm_ops = { | |
331 | .prepare = omap2_pm_prepare, | |
332 | .enter = omap2_pm_enter, | |
333 | .finish = omap2_pm_finish, | |
334 | .valid = suspend_valid_only_mem, | |
335 | }; | |
336 | ||
a23456e9 | 337 | static int _pm_clkdm_enable_hwsup(struct clockdomain *clkdm, void *unused) |
8bd22949 KH |
338 | { |
339 | omap2_clkdm_allow_idle(clkdm); | |
340 | return 0; | |
341 | } | |
342 | ||
343 | static void __init prcm_setup_regs(void) | |
344 | { | |
345 | int i, num_mem_banks; | |
346 | struct powerdomain *pwrdm; | |
347 | ||
348 | /* Enable autoidle */ | |
349 | prm_write_mod_reg(OMAP24XX_AUTOIDLE, OCP_MOD, | |
350 | OMAP2_PRCM_SYSCONFIG_OFFSET); | |
351 | ||
352 | /* Set all domain wakeup dependencies */ | |
353 | prm_write_mod_reg(OMAP_EN_WKUP_MASK, MPU_MOD, PM_WKDEP); | |
354 | prm_write_mod_reg(0, OMAP24XX_DSP_MOD, PM_WKDEP); | |
355 | prm_write_mod_reg(0, GFX_MOD, PM_WKDEP); | |
356 | prm_write_mod_reg(0, CORE_MOD, PM_WKDEP); | |
357 | if (cpu_is_omap2430()) | |
358 | prm_write_mod_reg(0, OMAP2430_MDM_MOD, PM_WKDEP); | |
359 | ||
360 | /* | |
361 | * Set CORE powerdomain memory banks to retain their contents | |
362 | * during RETENTION | |
363 | */ | |
364 | num_mem_banks = pwrdm_get_mem_bank_count(core_pwrdm); | |
365 | for (i = 0; i < num_mem_banks; i++) | |
366 | pwrdm_set_mem_retst(core_pwrdm, i, PWRDM_POWER_RET); | |
367 | ||
368 | /* Set CORE powerdomain's next power state to RETENTION */ | |
369 | pwrdm_set_next_pwrst(core_pwrdm, PWRDM_POWER_RET); | |
370 | ||
371 | /* | |
372 | * Set MPU powerdomain's next power state to RETENTION; | |
373 | * preserve logic state during retention | |
374 | */ | |
375 | pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET); | |
376 | pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET); | |
377 | ||
378 | /* Force-power down DSP, GFX powerdomains */ | |
379 | ||
380 | pwrdm = clkdm_get_pwrdm(dsp_clkdm); | |
381 | pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_OFF); | |
382 | omap2_clkdm_sleep(dsp_clkdm); | |
383 | ||
384 | pwrdm = clkdm_get_pwrdm(gfx_clkdm); | |
385 | pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_OFF); | |
386 | omap2_clkdm_sleep(gfx_clkdm); | |
387 | ||
388 | /* Enable clockdomain hardware-supervised control for all clkdms */ | |
a23456e9 | 389 | clkdm_for_each(_pm_clkdm_enable_hwsup, NULL); |
8bd22949 KH |
390 | |
391 | /* Enable clock autoidle for all domains */ | |
392 | cm_write_mod_reg(OMAP24XX_AUTO_CAM | | |
393 | OMAP24XX_AUTO_MAILBOXES | | |
394 | OMAP24XX_AUTO_WDT4 | | |
395 | OMAP2420_AUTO_WDT3 | | |
396 | OMAP24XX_AUTO_MSPRO | | |
397 | OMAP2420_AUTO_MMC | | |
398 | OMAP24XX_AUTO_FAC | | |
399 | OMAP2420_AUTO_EAC | | |
400 | OMAP24XX_AUTO_HDQ | | |
401 | OMAP24XX_AUTO_UART2 | | |
402 | OMAP24XX_AUTO_UART1 | | |
403 | OMAP24XX_AUTO_I2C2 | | |
404 | OMAP24XX_AUTO_I2C1 | | |
405 | OMAP24XX_AUTO_MCSPI2 | | |
406 | OMAP24XX_AUTO_MCSPI1 | | |
407 | OMAP24XX_AUTO_MCBSP2 | | |
408 | OMAP24XX_AUTO_MCBSP1 | | |
409 | OMAP24XX_AUTO_GPT12 | | |
410 | OMAP24XX_AUTO_GPT11 | | |
411 | OMAP24XX_AUTO_GPT10 | | |
412 | OMAP24XX_AUTO_GPT9 | | |
413 | OMAP24XX_AUTO_GPT8 | | |
414 | OMAP24XX_AUTO_GPT7 | | |
415 | OMAP24XX_AUTO_GPT6 | | |
416 | OMAP24XX_AUTO_GPT5 | | |
417 | OMAP24XX_AUTO_GPT4 | | |
418 | OMAP24XX_AUTO_GPT3 | | |
419 | OMAP24XX_AUTO_GPT2 | | |
420 | OMAP2420_AUTO_VLYNQ | | |
421 | OMAP24XX_AUTO_DSS, | |
422 | CORE_MOD, CM_AUTOIDLE1); | |
423 | cm_write_mod_reg(OMAP24XX_AUTO_UART3 | | |
424 | OMAP24XX_AUTO_SSI | | |
425 | OMAP24XX_AUTO_USB, | |
426 | CORE_MOD, CM_AUTOIDLE2); | |
427 | cm_write_mod_reg(OMAP24XX_AUTO_SDRC | | |
428 | OMAP24XX_AUTO_GPMC | | |
429 | OMAP24XX_AUTO_SDMA, | |
430 | CORE_MOD, CM_AUTOIDLE3); | |
431 | cm_write_mod_reg(OMAP24XX_AUTO_PKA | | |
432 | OMAP24XX_AUTO_AES | | |
433 | OMAP24XX_AUTO_RNG | | |
434 | OMAP24XX_AUTO_SHA | | |
435 | OMAP24XX_AUTO_DES, | |
436 | CORE_MOD, OMAP24XX_CM_AUTOIDLE4); | |
437 | ||
438 | cm_write_mod_reg(OMAP2420_AUTO_DSP_IPI, OMAP24XX_DSP_MOD, CM_AUTOIDLE); | |
439 | ||
440 | /* Put DPLL and both APLLs into autoidle mode */ | |
441 | cm_write_mod_reg((0x03 << OMAP24XX_AUTO_DPLL_SHIFT) | | |
442 | (0x03 << OMAP24XX_AUTO_96M_SHIFT) | | |
443 | (0x03 << OMAP24XX_AUTO_54M_SHIFT), | |
444 | PLL_MOD, CM_AUTOIDLE); | |
445 | ||
446 | cm_write_mod_reg(OMAP24XX_AUTO_OMAPCTRL | | |
447 | OMAP24XX_AUTO_WDT1 | | |
448 | OMAP24XX_AUTO_MPU_WDT | | |
449 | OMAP24XX_AUTO_GPIOS | | |
450 | OMAP24XX_AUTO_32KSYNC | | |
451 | OMAP24XX_AUTO_GPT1, | |
452 | WKUP_MOD, CM_AUTOIDLE); | |
453 | ||
454 | /* REVISIT: Configure number of 32 kHz clock cycles for sys_clk | |
455 | * stabilisation */ | |
456 | prm_write_mod_reg(15 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD, | |
457 | OMAP2_PRCM_CLKSSETUP_OFFSET); | |
458 | ||
459 | /* Configure automatic voltage transition */ | |
460 | prm_write_mod_reg(2 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD, | |
461 | OMAP2_PRCM_VOLTSETUP_OFFSET); | |
462 | prm_write_mod_reg(OMAP24XX_AUTO_EXTVOLT | | |
463 | (0x1 << OMAP24XX_SETOFF_LEVEL_SHIFT) | | |
464 | OMAP24XX_MEMRETCTRL | | |
465 | (0x1 << OMAP24XX_SETRET_LEVEL_SHIFT) | | |
466 | (0x0 << OMAP24XX_VOLT_LEVEL_SHIFT), | |
467 | OMAP24XX_GR_MOD, OMAP2_PRCM_VOLTCTRL_OFFSET); | |
468 | ||
469 | /* Enable wake-up events */ | |
470 | prm_write_mod_reg(OMAP24XX_EN_GPIOS | OMAP24XX_EN_GPT1, | |
471 | WKUP_MOD, PM_WKEN); | |
472 | } | |
473 | ||
7cc515f7 | 474 | static int __init omap2_pm_init(void) |
8bd22949 KH |
475 | { |
476 | u32 l; | |
477 | ||
478 | if (!cpu_is_omap24xx()) | |
479 | return -ENODEV; | |
480 | ||
481 | printk(KERN_INFO "Power Management for OMAP2 initializing\n"); | |
482 | l = prm_read_mod_reg(OCP_MOD, OMAP2_PRCM_REVISION_OFFSET); | |
483 | printk(KERN_INFO "PRCM revision %d.%d\n", (l >> 4) & 0x0f, l & 0x0f); | |
484 | ||
485 | /* Look up important powerdomains, clockdomains */ | |
486 | ||
487 | mpu_pwrdm = pwrdm_lookup("mpu_pwrdm"); | |
488 | if (!mpu_pwrdm) | |
489 | pr_err("PM: mpu_pwrdm not found\n"); | |
490 | ||
491 | core_pwrdm = pwrdm_lookup("core_pwrdm"); | |
492 | if (!core_pwrdm) | |
493 | pr_err("PM: core_pwrdm not found\n"); | |
494 | ||
495 | dsp_clkdm = clkdm_lookup("dsp_clkdm"); | |
496 | if (!dsp_clkdm) | |
497 | pr_err("PM: mpu_clkdm not found\n"); | |
498 | ||
499 | gfx_clkdm = clkdm_lookup("gfx_clkdm"); | |
500 | if (!gfx_clkdm) | |
501 | pr_err("PM: gfx_clkdm not found\n"); | |
502 | ||
503 | ||
504 | osc_ck = clk_get(NULL, "osc_ck"); | |
505 | if (IS_ERR(osc_ck)) { | |
506 | printk(KERN_ERR "could not get osc_ck\n"); | |
507 | return -ENODEV; | |
508 | } | |
509 | ||
510 | if (cpu_is_omap242x()) { | |
511 | emul_ck = clk_get(NULL, "emul_ck"); | |
512 | if (IS_ERR(emul_ck)) { | |
513 | printk(KERN_ERR "could not get emul_ck\n"); | |
514 | clk_put(osc_ck); | |
515 | return -ENODEV; | |
516 | } | |
517 | } | |
518 | ||
519 | prcm_setup_regs(); | |
520 | ||
521 | /* Hack to prevent MPU retention when STI console is enabled. */ | |
522 | { | |
523 | const struct omap_sti_console_config *sti; | |
524 | ||
525 | sti = omap_get_config(OMAP_TAG_STI_CONSOLE, | |
526 | struct omap_sti_console_config); | |
527 | if (sti != NULL && sti->enable) | |
528 | sti_console_enabled = 1; | |
529 | } | |
530 | ||
531 | /* | |
532 | * We copy the assembler sleep/wakeup routines to SRAM. | |
533 | * These routines need to be in SRAM as that's the only | |
534 | * memory the MPU can see when it wakes up. | |
535 | */ | |
536 | if (cpu_is_omap24xx()) { | |
537 | omap2_sram_idle = omap_sram_push(omap24xx_idle_loop_suspend, | |
538 | omap24xx_idle_loop_suspend_sz); | |
539 | ||
540 | omap2_sram_suspend = omap_sram_push(omap24xx_cpu_suspend, | |
541 | omap24xx_cpu_suspend_sz); | |
542 | } | |
543 | ||
544 | suspend_set_ops(&omap_pm_ops); | |
545 | pm_idle = omap2_pm_idle; | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
550 | late_initcall(omap2_pm_init); |