arch/arm/mach-pxa/pxa27x.c - kernel/common - Git at Google

 /*
  *  linux/arch/arm/mach-pxa/pxa27x.c
  *
  *  Author:	Nicolas Pitre
  *  Created:	Nov 05, 2002
  *  Copyright:	MontaVista Software Inc.
  *
  * Code specific to PXA27x aka Bulverde.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/suspend.h>
 #include <linux/platform_device.h>
 #include <linux/sysdev.h>

 #include <mach/hardware.h>
 #include <asm/irq.h>
 #include <mach/irqs.h>
 #include <mach/gpio.h>
 #include <mach/pxa27x.h>
 #include <mach/reset.h>
 #include <mach/ohci.h>
 #include <mach/pm.h>
 #include <mach/dma.h>
 #include <plat/i2c.h>

 #include "generic.h"
 #include "devices.h"
 #include "clock.h"

 void pxa27x_clear_otgph(void)
 {
 	if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
 		PSSR |= PSSR_OTGPH;
 }
 EXPORT_SYMBOL(pxa27x_clear_otgph);

 static unsigned long ac97_reset_config[] = {
 	GPIO113_GPIO,
 	GPIO113_AC97_nRESET,
 	GPIO95_GPIO,
 	GPIO95_AC97_nRESET,
 };

 void pxa27x_assert_ac97reset(int reset_gpio, int on)
 {
 	if (reset_gpio == 113)
 		pxa2xx_mfp_config(on ? &ac97_reset_config[0] :
 				       &ac97_reset_config[1], 1);

 	if (reset_gpio == 95)
 		pxa2xx_mfp_config(on ? &ac97_reset_config[2] :
 				       &ac97_reset_config[3], 1);
 }
 EXPORT_SYMBOL_GPL(pxa27x_assert_ac97reset);

 /* Crystal clock: 13MHz */
 #define BASE_CLK	13000000

 /*
  * Get the clock frequency as reflected by CCSR and the turbo flag.
  * We assume these values have been applied via a fcs.
  * If info is not 0 we also display the current settings.
  */
 unsigned int pxa27x_get_clk_frequency_khz(int info)
 {
 	unsigned long ccsr, clkcfg;
 	unsigned int l, L, m, M, n2, N, S;
        	int cccr_a, t, ht, b;

 	ccsr = CCSR;
 	cccr_a = CCCR & (1 << 25);

 	/* Read clkcfg register: it has turbo, b, half-turbo (and f) */
 	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
 	t  = clkcfg & (1 << 0);
 	ht = clkcfg & (1 << 2);
 	b  = clkcfg & (1 << 3);

 	l  = ccsr & 0x1f;
 	n2 = (ccsr>>7) & 0xf;
 	m  = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;

 	L  = l * BASE_CLK;
 	N  = (L * n2) / 2;
 	M  = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
 	S  = (b) ? L : (L/2);

 	if (info) {
 		printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
 			L / 1000000, (L % 1000000) / 10000, l );
 		printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
 			N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
 			(t) ? "" : "in" );
 		printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
 			M / 1000000, (M % 1000000) / 10000, m );
 		printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
 			S / 1000000, (S % 1000000) / 10000 );
 	}

 	return (t) ? (N/1000) : (L/1000);
 }

 /*
  * Return the current mem clock frequency in units of 10kHz as
  * reflected by CCCR[A], B, and L
  */
 unsigned int pxa27x_get_memclk_frequency_10khz(void)
 {
 	unsigned long ccsr, clkcfg;
 	unsigned int l, L, m, M;
        	int cccr_a, b;

 	ccsr = CCSR;
 	cccr_a = CCCR & (1 << 25);

 	/* Read clkcfg register: it has turbo, b, half-turbo (and f) */
 	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
 	b = clkcfg & (1 << 3);

 	l = ccsr & 0x1f;
 	m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;

 	L = l * BASE_CLK;
 	M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));

 	return (M / 10000);
 }

 /*
  * Return the current LCD clock frequency in units of 10kHz as
  */
 static unsigned int pxa27x_get_lcdclk_frequency_10khz(void)
 {
 	unsigned long ccsr;
 	unsigned int l, L, k, K;

 	ccsr = CCSR;

 	l = ccsr & 0x1f;
 	k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;

 	L = l * BASE_CLK;
 	K = L / k;

 	return (K / 10000);
 }

 static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
 {
 	return pxa27x_get_lcdclk_frequency_10khz() * 10000;
 }

 static const struct clkops clk_pxa27x_lcd_ops = {
 	.enable		= clk_cken_enable,
 	.disable	= clk_cken_disable,
 	.getrate	= clk_pxa27x_lcd_getrate,
 };

 static DEFINE_CK(pxa27x_lcd, LCD, &clk_pxa27x_lcd_ops);
 static DEFINE_CK(pxa27x_camera, CAMERA, &clk_pxa27x_lcd_ops);
 static DEFINE_CKEN(pxa27x_ffuart, FFUART, 14857000, 1);
 static DEFINE_CKEN(pxa27x_btuart, BTUART, 14857000, 1);
 static DEFINE_CKEN(pxa27x_stuart, STUART, 14857000, 1);
 static DEFINE_CKEN(pxa27x_i2s, I2S, 14682000, 0);
 static DEFINE_CKEN(pxa27x_i2c, I2C, 32842000, 0);
 static DEFINE_CKEN(pxa27x_usb, USB, 48000000, 5);
 static DEFINE_CKEN(pxa27x_mmc, MMC, 19500000, 0);
 static DEFINE_CKEN(pxa27x_ficp, FICP, 48000000, 0);
 static DEFINE_CKEN(pxa27x_usbhost, USBHOST, 48000000, 0);
 static DEFINE_CKEN(pxa27x_pwri2c, PWRI2C, 13000000, 0);
 static DEFINE_CKEN(pxa27x_keypad, KEYPAD, 32768, 0);
 static DEFINE_CKEN(pxa27x_ssp1, SSP1, 13000000, 0);
 static DEFINE_CKEN(pxa27x_ssp2, SSP2, 13000000, 0);
 static DEFINE_CKEN(pxa27x_ssp3, SSP3, 13000000, 0);
 static DEFINE_CKEN(pxa27x_pwm0, PWM0, 13000000, 0);
 static DEFINE_CKEN(pxa27x_pwm1, PWM1, 13000000, 0);
 static DEFINE_CKEN(pxa27x_ac97, AC97, 24576000, 0);
 static DEFINE_CKEN(pxa27x_ac97conf, AC97CONF, 24576000, 0);
 static DEFINE_CKEN(pxa27x_msl, MSL, 48000000, 0);
 static DEFINE_CKEN(pxa27x_usim, USIM, 48000000, 0);
 static DEFINE_CKEN(pxa27x_memstk, MEMSTK, 19500000, 0);
 static DEFINE_CKEN(pxa27x_im, IM, 0, 0);
 static DEFINE_CKEN(pxa27x_memc, MEMC, 0, 0);

 static struct clk_lookup pxa27x_clkregs[] = {
 	INIT_CLKREG(&clk_pxa27x_lcd, "pxa2xx-fb", NULL),
 	INIT_CLKREG(&clk_pxa27x_camera, "pxa27x-camera.0", NULL),
 	INIT_CLKREG(&clk_pxa27x_ffuart, "pxa2xx-uart.0", NULL),
 	INIT_CLKREG(&clk_pxa27x_btuart, "pxa2xx-uart.1", NULL),
 	INIT_CLKREG(&clk_pxa27x_stuart, "pxa2xx-uart.2", NULL),
 	INIT_CLKREG(&clk_pxa27x_i2s, "pxa2xx-i2s", NULL),
 	INIT_CLKREG(&clk_pxa27x_i2c, "pxa2xx-i2c.0", NULL),
 	INIT_CLKREG(&clk_pxa27x_usb, "pxa27x-udc", NULL),
 	INIT_CLKREG(&clk_pxa27x_mmc, "pxa2xx-mci.0", NULL),
 	INIT_CLKREG(&clk_pxa27x_stuart, "pxa2xx-ir", "UARTCLK"),
 	INIT_CLKREG(&clk_pxa27x_ficp, "pxa2xx-ir", "FICPCLK"),
 	INIT_CLKREG(&clk_pxa27x_usbhost, "pxa27x-ohci", NULL),
 	INIT_CLKREG(&clk_pxa27x_pwri2c, "pxa2xx-i2c.1", NULL),
 	INIT_CLKREG(&clk_pxa27x_keypad, "pxa27x-keypad", NULL),
 	INIT_CLKREG(&clk_pxa27x_ssp1, "pxa27x-ssp.0", NULL),
 	INIT_CLKREG(&clk_pxa27x_ssp2, "pxa27x-ssp.1", NULL),
 	INIT_CLKREG(&clk_pxa27x_ssp3, "pxa27x-ssp.2", NULL),
 	INIT_CLKREG(&clk_pxa27x_pwm0, "pxa27x-pwm.0", NULL),
 	INIT_CLKREG(&clk_pxa27x_pwm1, "pxa27x-pwm.1", NULL),
 	INIT_CLKREG(&clk_pxa27x_ac97, NULL, "AC97CLK"),
 	INIT_CLKREG(&clk_pxa27x_ac97conf, NULL, "AC97CONFCLK"),
 	INIT_CLKREG(&clk_pxa27x_msl, NULL, "MSLCLK"),
 	INIT_CLKREG(&clk_pxa27x_usim, NULL, "USIMCLK"),
 	INIT_CLKREG(&clk_pxa27x_memstk, NULL, "MSTKCLK"),
 	INIT_CLKREG(&clk_pxa27x_im, NULL, "IMCLK"),
 	INIT_CLKREG(&clk_pxa27x_memc, NULL, "MEMCLK"),
 };

 #ifdef CONFIG_PM

 #define SAVE(x)		sleep_save[SLEEP_SAVE_##x] = x
 #define RESTORE(x)	x = sleep_save[SLEEP_SAVE_##x]

 /*
  * allow platforms to override default PWRMODE setting used for PM_SUSPEND_MEM
  */
 static unsigned int pwrmode = PWRMODE_SLEEP;

 int __init pxa27x_set_pwrmode(unsigned int mode)
 {
 	switch (mode) {
 	case PWRMODE_SLEEP:
 	case PWRMODE_DEEPSLEEP:
 		pwrmode = mode;
 		return 0;
 	}

 	return -EINVAL;
 }

 /*
  * List of global PXA peripheral registers to preserve.
  * More ones like CP and general purpose register values are preserved
  * with the stack pointer in sleep.S.
  */
 enum {
 	SLEEP_SAVE_PSTR,
 	SLEEP_SAVE_CKEN,
 	SLEEP_SAVE_MDREFR,
 	SLEEP_SAVE_PCFR,
 	SLEEP_SAVE_COUNT
 };

 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
 {
 	SAVE(MDREFR);
 	SAVE(PCFR);

 	SAVE(CKEN);
 	SAVE(PSTR);
 }

 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
 {
 	RESTORE(MDREFR);
 	RESTORE(PCFR);

 	PSSR = PSSR_RDH | PSSR_PH;

 	RESTORE(CKEN);
 	RESTORE(PSTR);
 }

 void pxa27x_cpu_pm_enter(suspend_state_t state)
 {
 	extern void pxa_cpu_standby(void);

 	/* ensure voltage-change sequencer not initiated, which hangs */
 	PCFR &= ~PCFR_FVC;

 	/* Clear edge-detect status register. */
 	PEDR = 0xDF12FE1B;

 	/* Clear reset status */
 	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;

 	switch (state) {
 	case PM_SUSPEND_STANDBY:
 		pxa_cpu_standby();
 		break;
 	case PM_SUSPEND_MEM:
 		pxa27x_cpu_suspend(pwrmode);
 		break;
 	}
 }

 static int pxa27x_cpu_pm_valid(suspend_state_t state)
 {
 	return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
 }

 static int pxa27x_cpu_pm_prepare(void)
 {
 	/* set resume return address */
 	PSPR = virt_to_phys(pxa_cpu_resume);
 	return 0;
 }

 static void pxa27x_cpu_pm_finish(void)
 {
 	/* ensure not to come back here if it wasn't intended */
 	PSPR = 0;
 }

 static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
 	.save_count	= SLEEP_SAVE_COUNT,
 	.save		= pxa27x_cpu_pm_save,
 	.restore	= pxa27x_cpu_pm_restore,
 	.valid		= pxa27x_cpu_pm_valid,
 	.enter		= pxa27x_cpu_pm_enter,
 	.prepare	= pxa27x_cpu_pm_prepare,
 	.finish		= pxa27x_cpu_pm_finish,
 };

 static void __init pxa27x_init_pm(void)
 {
 	pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
 }
 #else
 static inline void pxa27x_init_pm(void) {}
 #endif

 /* PXA27x:  Various gpios can issue wakeup events.  This logic only
  * handles the simple cases, not the WEMUX2 and WEMUX3 options
  */
 static int pxa27x_set_wake(unsigned int irq, unsigned int on)
 {
 	int gpio = IRQ_TO_GPIO(irq);
 	uint32_t mask;

 	if (gpio >= 0 && gpio < 128)
 		return gpio_set_wake(gpio, on);

 	if (irq == IRQ_KEYPAD)
 		return keypad_set_wake(on);

 	switch (irq) {
 	case IRQ_RTCAlrm:
 		mask = PWER_RTC;
 		break;
 	case IRQ_USB:
 		mask = 1u << 26;
 		break;
 	default:
 		return -EINVAL;
 	}

 	if (on)
 		PWER |= mask;
 	else
 		PWER &=~mask;

 	return 0;
 }

 void __init pxa27x_init_irq(void)
 {
 	pxa_init_irq(34, pxa27x_set_wake);
 	pxa_init_gpio(IRQ_GPIO_2_x, 2, 120, pxa27x_set_wake);
 }

 /*
  * device registration specific to PXA27x.
  */
 void __init pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info)
 {
 	local_irq_disable();
 	PCFR |= PCFR_PI2CEN;
 	local_irq_enable();
 	pxa_register_device(&pxa27x_device_i2c_power, info);
 }

 static struct platform_device *devices[] __initdata = {
 	&pxa27x_device_udc,
 	&pxa_device_i2s,
 	&sa1100_device_rtc,
 	&pxa_device_rtc,
 	&pxa27x_device_ssp1,
 	&pxa27x_device_ssp2,
 	&pxa27x_device_ssp3,
 	&pxa27x_device_pwm0,
 	&pxa27x_device_pwm1,
 };

 static struct sys_device pxa27x_sysdev[] = {
 	{
 		.cls	= &pxa_irq_sysclass,
 	}, {
 		.cls	= &pxa2xx_mfp_sysclass,
 	}, {
 		.cls	= &pxa_gpio_sysclass,
 	},
 };

 static int __init pxa27x_init(void)
 {
 	int i, ret = 0;

 	if (cpu_is_pxa27x()) {

 		reset_status = RCSR;

 		clkdev_add_table(pxa27x_clkregs, ARRAY_SIZE(pxa27x_clkregs));

 		if ((ret = pxa_init_dma(IRQ_DMA, 32)))
 			return ret;

 		pxa27x_init_pm();

 		for (i = 0; i < ARRAY_SIZE(pxa27x_sysdev); i++) {
 			ret = sysdev_register(&pxa27x_sysdev[i]);
 			if (ret)
 				pr_err("failed to register sysdev[%d]\n", i);
 		}

 		ret = platform_add_devices(devices, ARRAY_SIZE(devices));
 	}

 	return ret;
 }

 postcore_initcall(pxa27x_init);
	/*
	* linux/arch/arm/mach-pxa/pxa27x.c
	*
	* Author: Nicolas Pitre
	* Created: Nov 05, 2002
	* Copyright: MontaVista Software Inc.
	*
	* Code specific to PXA27x aka Bulverde.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/suspend.h>
	#include <linux/platform_device.h>
	#include <linux/sysdev.h>

	#include <mach/hardware.h>
	#include <asm/irq.h>
	#include <mach/irqs.h>
	#include <mach/gpio.h>
	#include <mach/pxa27x.h>
	#include <mach/reset.h>
	#include <mach/ohci.h>
	#include <mach/pm.h>
	#include <mach/dma.h>
	#include <plat/i2c.h>

	#include "generic.h"
	#include "devices.h"
	#include "clock.h"

	void pxa27x_clear_otgph(void)
	{
	if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
	PSSR \|= PSSR_OTGPH;
	}
	EXPORT_SYMBOL(pxa27x_clear_otgph);

	static unsigned long ac97_reset_config[] = {
	GPIO113_GPIO,
	GPIO113_AC97_nRESET,
	GPIO95_GPIO,
	GPIO95_AC97_nRESET,
	};

	void pxa27x_assert_ac97reset(int reset_gpio, int on)
	{
	if (reset_gpio == 113)
	pxa2xx_mfp_config(on ? &ac97_reset_config[0] :
	&ac97_reset_config[1], 1);

	if (reset_gpio == 95)
	pxa2xx_mfp_config(on ? &ac97_reset_config[2] :
	&ac97_reset_config[3], 1);
	}
	EXPORT_SYMBOL_GPL(pxa27x_assert_ac97reset);

	/* Crystal clock: 13MHz */
	#define BASE_CLK 13000000

	/*
	* Get the clock frequency as reflected by CCSR and the turbo flag.
	* We assume these values have been applied via a fcs.
	* If info is not 0 we also display the current settings.
	*/
	unsigned int pxa27x_get_clk_frequency_khz(int info)
	{
	unsigned long ccsr, clkcfg;
	unsigned int l, L, m, M, n2, N, S;
	int cccr_a, t, ht, b;

	ccsr = CCSR;
	cccr_a = CCCR & (1 << 25);

	/* Read clkcfg register: it has turbo, b, half-turbo (and f) */
	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
	t = clkcfg & (1 << 0);
	ht = clkcfg & (1 << 2);
	b = clkcfg & (1 << 3);

	l = ccsr & 0x1f;
	n2 = (ccsr>>7) & 0xf;
	m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;

	L = l * BASE_CLK;
	N = (L * n2) / 2;
	M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
	S = (b) ? L : (L/2);

	if (info) {
	printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
	L / 1000000, (L % 1000000) / 10000, l );
	printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
	N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
	(t) ? "" : "in" );
	printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
	M / 1000000, (M % 1000000) / 10000, m );
	printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
	S / 1000000, (S % 1000000) / 10000 );
	}

	return (t) ? (N/1000) : (L/1000);
	}

	/*
	* Return the current mem clock frequency in units of 10kHz as
	* reflected by CCCR[A], B, and L
	*/
	unsigned int pxa27x_get_memclk_frequency_10khz(void)
	{
	unsigned long ccsr, clkcfg;
	unsigned int l, L, m, M;
	int cccr_a, b;

	ccsr = CCSR;
	cccr_a = CCCR & (1 << 25);

	/* Read clkcfg register: it has turbo, b, half-turbo (and f) */
	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
	b = clkcfg & (1 << 3);

	l = ccsr & 0x1f;
	m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;

	L = l * BASE_CLK;
	M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));

	return (M / 10000);
	}

	/*
	* Return the current LCD clock frequency in units of 10kHz as
	*/
	static unsigned int pxa27x_get_lcdclk_frequency_10khz(void)
	{
	unsigned long ccsr;
	unsigned int l, L, k, K;

	ccsr = CCSR;

	l = ccsr & 0x1f;
	k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;

	L = l * BASE_CLK;
	K = L / k;

	return (K / 10000);
	}

	static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
	{
	return pxa27x_get_lcdclk_frequency_10khz() * 10000;
	}

	static const struct clkops clk_pxa27x_lcd_ops = {
	.enable = clk_cken_enable,
	.disable = clk_cken_disable,
	.getrate = clk_pxa27x_lcd_getrate,
	};

	static DEFINE_CK(pxa27x_lcd, LCD, &clk_pxa27x_lcd_ops);
	static DEFINE_CK(pxa27x_camera, CAMERA, &clk_pxa27x_lcd_ops);
	static DEFINE_CKEN(pxa27x_ffuart, FFUART, 14857000, 1);
	static DEFINE_CKEN(pxa27x_btuart, BTUART, 14857000, 1);
	static DEFINE_CKEN(pxa27x_stuart, STUART, 14857000, 1);
	static DEFINE_CKEN(pxa27x_i2s, I2S, 14682000, 0);
	static DEFINE_CKEN(pxa27x_i2c, I2C, 32842000, 0);
	static DEFINE_CKEN(pxa27x_usb, USB, 48000000, 5);
	static DEFINE_CKEN(pxa27x_mmc, MMC, 19500000, 0);
	static DEFINE_CKEN(pxa27x_ficp, FICP, 48000000, 0);
	static DEFINE_CKEN(pxa27x_usbhost, USBHOST, 48000000, 0);
	static DEFINE_CKEN(pxa27x_pwri2c, PWRI2C, 13000000, 0);
	static DEFINE_CKEN(pxa27x_keypad, KEYPAD, 32768, 0);
	static DEFINE_CKEN(pxa27x_ssp1, SSP1, 13000000, 0);
	static DEFINE_CKEN(pxa27x_ssp2, SSP2, 13000000, 0);
	static DEFINE_CKEN(pxa27x_ssp3, SSP3, 13000000, 0);
	static DEFINE_CKEN(pxa27x_pwm0, PWM0, 13000000, 0);
	static DEFINE_CKEN(pxa27x_pwm1, PWM1, 13000000, 0);
	static DEFINE_CKEN(pxa27x_ac97, AC97, 24576000, 0);
	static DEFINE_CKEN(pxa27x_ac97conf, AC97CONF, 24576000, 0);
	static DEFINE_CKEN(pxa27x_msl, MSL, 48000000, 0);
	static DEFINE_CKEN(pxa27x_usim, USIM, 48000000, 0);
	static DEFINE_CKEN(pxa27x_memstk, MEMSTK, 19500000, 0);
	static DEFINE_CKEN(pxa27x_im, IM, 0, 0);
	static DEFINE_CKEN(pxa27x_memc, MEMC, 0, 0);

	static struct clk_lookup pxa27x_clkregs[] = {
	INIT_CLKREG(&clk_pxa27x_lcd, "pxa2xx-fb", NULL),
	INIT_CLKREG(&clk_pxa27x_camera, "pxa27x-camera.0", NULL),
	INIT_CLKREG(&clk_pxa27x_ffuart, "pxa2xx-uart.0", NULL),
	INIT_CLKREG(&clk_pxa27x_btuart, "pxa2xx-uart.1", NULL),
	INIT_CLKREG(&clk_pxa27x_stuart, "pxa2xx-uart.2", NULL),
	INIT_CLKREG(&clk_pxa27x_i2s, "pxa2xx-i2s", NULL),
	INIT_CLKREG(&clk_pxa27x_i2c, "pxa2xx-i2c.0", NULL),
	INIT_CLKREG(&clk_pxa27x_usb, "pxa27x-udc", NULL),
	INIT_CLKREG(&clk_pxa27x_mmc, "pxa2xx-mci.0", NULL),
	INIT_CLKREG(&clk_pxa27x_stuart, "pxa2xx-ir", "UARTCLK"),
	INIT_CLKREG(&clk_pxa27x_ficp, "pxa2xx-ir", "FICPCLK"),
	INIT_CLKREG(&clk_pxa27x_usbhost, "pxa27x-ohci", NULL),
	INIT_CLKREG(&clk_pxa27x_pwri2c, "pxa2xx-i2c.1", NULL),
	INIT_CLKREG(&clk_pxa27x_keypad, "pxa27x-keypad", NULL),
	INIT_CLKREG(&clk_pxa27x_ssp1, "pxa27x-ssp.0", NULL),
	INIT_CLKREG(&clk_pxa27x_ssp2, "pxa27x-ssp.1", NULL),
	INIT_CLKREG(&clk_pxa27x_ssp3, "pxa27x-ssp.2", NULL),
	INIT_CLKREG(&clk_pxa27x_pwm0, "pxa27x-pwm.0", NULL),
	INIT_CLKREG(&clk_pxa27x_pwm1, "pxa27x-pwm.1", NULL),
	INIT_CLKREG(&clk_pxa27x_ac97, NULL, "AC97CLK"),
	INIT_CLKREG(&clk_pxa27x_ac97conf, NULL, "AC97CONFCLK"),
	INIT_CLKREG(&clk_pxa27x_msl, NULL, "MSLCLK"),
	INIT_CLKREG(&clk_pxa27x_usim, NULL, "USIMCLK"),
	INIT_CLKREG(&clk_pxa27x_memstk, NULL, "MSTKCLK"),
	INIT_CLKREG(&clk_pxa27x_im, NULL, "IMCLK"),
	INIT_CLKREG(&clk_pxa27x_memc, NULL, "MEMCLK"),
	};

	#ifdef CONFIG_PM

	#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
	#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]

	/*
	* allow platforms to override default PWRMODE setting used for PM_SUSPEND_MEM
	*/
	static unsigned int pwrmode = PWRMODE_SLEEP;

	int __init pxa27x_set_pwrmode(unsigned int mode)
	{
	switch (mode) {
	case PWRMODE_SLEEP:
	case PWRMODE_DEEPSLEEP:
	pwrmode = mode;
	return 0;
	}

	return -EINVAL;
	}

	/*
	* List of global PXA peripheral registers to preserve.
	* More ones like CP and general purpose register values are preserved
	* with the stack pointer in sleep.S.
	*/
	enum {
	SLEEP_SAVE_PSTR,
	SLEEP_SAVE_CKEN,
	SLEEP_SAVE_MDREFR,
	SLEEP_SAVE_PCFR,
	SLEEP_SAVE_COUNT
	};

	void pxa27x_cpu_pm_save(unsigned long *sleep_save)
	{
	SAVE(MDREFR);
	SAVE(PCFR);

	SAVE(CKEN);
	SAVE(PSTR);
	}

	void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
	{
	RESTORE(MDREFR);
	RESTORE(PCFR);

	PSSR = PSSR_RDH \| PSSR_PH;

	RESTORE(CKEN);
	RESTORE(PSTR);
	}

	void pxa27x_cpu_pm_enter(suspend_state_t state)
	{
	extern void pxa_cpu_standby(void);

	/* ensure voltage-change sequencer not initiated, which hangs */
	PCFR &= ~PCFR_FVC;

	/* Clear edge-detect status register. */
	PEDR = 0xDF12FE1B;

	/* Clear reset status */
	RCSR = RCSR_HWR \| RCSR_WDR \| RCSR_SMR \| RCSR_GPR;

	switch (state) {
	case PM_SUSPEND_STANDBY:
	pxa_cpu_standby();
	break;
	case PM_SUSPEND_MEM:
	pxa27x_cpu_suspend(pwrmode);
	break;
	}
	}

	static int pxa27x_cpu_pm_valid(suspend_state_t state)
	{
	return state == PM_SUSPEND_MEM \|\| state == PM_SUSPEND_STANDBY;
	}

	static int pxa27x_cpu_pm_prepare(void)
	{
	/* set resume return address */
	PSPR = virt_to_phys(pxa_cpu_resume);
	return 0;
	}

	static void pxa27x_cpu_pm_finish(void)
	{
	/* ensure not to come back here if it wasn't intended */
	PSPR = 0;
	}

	static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
	.save_count = SLEEP_SAVE_COUNT,
	.save = pxa27x_cpu_pm_save,
	.restore = pxa27x_cpu_pm_restore,
	.valid = pxa27x_cpu_pm_valid,
	.enter = pxa27x_cpu_pm_enter,
	.prepare = pxa27x_cpu_pm_prepare,
	.finish = pxa27x_cpu_pm_finish,
	};

	static void __init pxa27x_init_pm(void)
	{
	pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
	}
	#else
	static inline void pxa27x_init_pm(void) {}
	#endif

	/* PXA27x: Various gpios can issue wakeup events. This logic only
	* handles the simple cases, not the WEMUX2 and WEMUX3 options
	*/
	static int pxa27x_set_wake(unsigned int irq, unsigned int on)
	{
	int gpio = IRQ_TO_GPIO(irq);
	uint32_t mask;

	if (gpio >= 0 && gpio < 128)
	return gpio_set_wake(gpio, on);

	if (irq == IRQ_KEYPAD)
	return keypad_set_wake(on);

	switch (irq) {
	case IRQ_RTCAlrm:
	mask = PWER_RTC;
	break;
	case IRQ_USB:
	mask = 1u << 26;
	break;
	default:
	return -EINVAL;
	}

	if (on)
	PWER \|= mask;
	else
	PWER &=~mask;

	return 0;
	}

	void __init pxa27x_init_irq(void)
	{
	pxa_init_irq(34, pxa27x_set_wake);
	pxa_init_gpio(IRQ_GPIO_2_x, 2, 120, pxa27x_set_wake);
	}

	/*
	* device registration specific to PXA27x.
	*/
	void __init pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info)
	{
	local_irq_disable();
	PCFR \|= PCFR_PI2CEN;
	local_irq_enable();
	pxa_register_device(&pxa27x_device_i2c_power, info);
	}

	static struct platform_device *devices[] __initdata = {
	&pxa27x_device_udc,
	&pxa_device_i2s,
	&sa1100_device_rtc,
	&pxa_device_rtc,
	&pxa27x_device_ssp1,
	&pxa27x_device_ssp2,
	&pxa27x_device_ssp3,
	&pxa27x_device_pwm0,
	&pxa27x_device_pwm1,
	};

	static struct sys_device pxa27x_sysdev[] = {
	{
	.cls = &pxa_irq_sysclass,
	}, {
	.cls = &pxa2xx_mfp_sysclass,
	}, {
	.cls = &pxa_gpio_sysclass,
	},
	};

	static int __init pxa27x_init(void)
	{
	int i, ret = 0;

	if (cpu_is_pxa27x()) {

	reset_status = RCSR;

	clkdev_add_table(pxa27x_clkregs, ARRAY_SIZE(pxa27x_clkregs));

	if ((ret = pxa_init_dma(IRQ_DMA, 32)))
	return ret;

	pxa27x_init_pm();

	for (i = 0; i < ARRAY_SIZE(pxa27x_sysdev); i++) {
	ret = sysdev_register(&pxa27x_sysdev[i]);
	if (ret)
	pr_err("failed to register sysdev[%d]\n", i);
	}

	ret = platform_add_devices(devices, ARRAY_SIZE(devices));
	}

	return ret;
	}

	postcore_initcall(pxa27x_init);