arch/arm/mach-pxa/pxa25x.c - kernel/prism - Git at Google

 /*
  *  linux/arch/arm/mach-pxa/pxa25x.c
  *
  *  Author:	Nicolas Pitre
  *  Created:	Jun 15, 2001
  *  Copyright:	MontaVista Software Inc.
  *
  * Code specific to PXA21x/25x/26x variants.
  *
  * 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.
  *
  * Since this file should be linked before any other machine specific file,
  * the __initcall() here will be executed first.  This serves as default
  * initialization stuff for PXA machines which can be overridden later if
  * need be.
  */
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/suspend.h>
 #include <linux/sysdev.h>

 #include <mach/hardware.h>
 #include <mach/irqs.h>
 #include <mach/gpio.h>
 #include <mach/pxa25x.h>
 #include <mach/reset.h>
 #include <mach/pm.h>
 #include <mach/dma.h>

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

 /*
  * Various clock factors driven by the CCCR register.
  */

 /* Crystal Frequency to Memory Frequency Multiplier (L) */
 static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, };

 /* Memory Frequency to Run Mode Frequency Multiplier (M) */
 static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 };

 /* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */
 /* Note: we store the value N * 2 here. */
 static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 };

 /* Crystal clock */
 #define BASE_CLK	3686400

 /*
  * Get the clock frequency as reflected by CCCR 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 pxa25x_get_clk_frequency_khz(int info)
 {
 	unsigned long cccr, turbo;
 	unsigned int l, L, m, M, n2, N;

 	cccr = CCCR;
 	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) );

 	l  =  L_clk_mult[(cccr >> 0) & 0x1f];
 	m  =  M_clk_mult[(cccr >> 5) & 0x03];
 	n2 = N2_clk_mult[(cccr >> 7) & 0x07];

 	L = l * BASE_CLK;
 	M = m * L;
 	N = n2 * M / 2;

 	if(info)
 	{
 		L += 5000;
 		printk( KERN_INFO "Memory clock: %d.%02dMHz (*%d)\n",
 			L / 1000000, (L % 1000000) / 10000, l );
 		M += 5000;
 		printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
 			M / 1000000, (M % 1000000) / 10000, m );
 		N += 5000;
 		printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
 			N / 1000000, (N % 1000000) / 10000, n2 / 2, (n2 % 2) * 5,
 			(turbo & 1) ? "" : "in" );
 	}

 	return (turbo & 1) ? (N/1000) : (M/1000);
 }

 /*
  * Return the current memory clock frequency in units of 10kHz
  */
 unsigned int pxa25x_get_memclk_frequency_10khz(void)
 {
 	return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000;
 }

 static unsigned long clk_pxa25x_lcd_getrate(struct clk *clk)
 {
 	return pxa25x_get_memclk_frequency_10khz() * 10000;
 }

 static const struct clkops clk_pxa25x_lcd_ops = {
 	.enable		= clk_cken_enable,
 	.disable	= clk_cken_disable,
 	.getrate	= clk_pxa25x_lcd_getrate,
 };

 static unsigned long gpio12_config_32k[] = {
 	GPIO12_32KHz,
 };

 static unsigned long gpio12_config_gpio[] = {
 	GPIO12_GPIO,
 };

 static void clk_gpio12_enable(struct clk *clk)
 {
 	pxa2xx_mfp_config(gpio12_config_32k, 1);
 }

 static void clk_gpio12_disable(struct clk *clk)
 {
 	pxa2xx_mfp_config(gpio12_config_gpio, 1);
 }

 static const struct clkops clk_pxa25x_gpio12_ops = {
 	.enable         = clk_gpio12_enable,
 	.disable        = clk_gpio12_disable,
 };

 static unsigned long gpio11_config_3m6[] = {
 	GPIO11_3_6MHz,
 };

 static unsigned long gpio11_config_gpio[] = {
 	GPIO11_GPIO,
 };

 static void clk_gpio11_enable(struct clk *clk)
 {
 	pxa2xx_mfp_config(gpio11_config_3m6, 1);
 }

 static void clk_gpio11_disable(struct clk *clk)
 {
 	pxa2xx_mfp_config(gpio11_config_gpio, 1);
 }

 static const struct clkops clk_pxa25x_gpio11_ops = {
 	.enable         = clk_gpio11_enable,
 	.disable        = clk_gpio11_disable,
 };

 /*
  * 3.6864MHz -> OST, GPIO, SSP, PWM, PLLs (95.842MHz, 147.456MHz)
  * 95.842MHz -> MMC 19.169MHz, I2C 31.949MHz, FICP 47.923MHz, USB 47.923MHz
  * 147.456MHz -> UART 14.7456MHz, AC97 12.288MHz, I2S 5.672MHz (allegedly)
  */
 static DEFINE_CKEN(pxa25x_hwuart, HWUART, 14745600, 1);

 static struct clk_lookup pxa25x_hwuart_clkreg =
 	INIT_CLKREG(&clk_pxa25x_hwuart, "pxa2xx-uart.3", NULL);

 /*
  * PXA 2xx clock declarations.
  */
 static DEFINE_CK(pxa25x_lcd, LCD, &clk_pxa25x_lcd_ops);
 static DEFINE_CKEN(pxa25x_ffuart, FFUART, 14745600, 1);
 static DEFINE_CKEN(pxa25x_btuart, BTUART, 14745600, 1);
 static DEFINE_CKEN(pxa25x_stuart, STUART, 14745600, 1);
 static DEFINE_CKEN(pxa25x_usb, USB, 47923000, 5);
 static DEFINE_CLK(pxa25x_gpio11, &clk_pxa25x_gpio11_ops, 3686400, 0);
 static DEFINE_CLK(pxa25x_gpio12, &clk_pxa25x_gpio12_ops, 32768, 0);
 static DEFINE_CKEN(pxa25x_mmc, MMC, 19169000, 0);
 static DEFINE_CKEN(pxa25x_i2c, I2C, 31949000, 0);
 static DEFINE_CKEN(pxa25x_ssp, SSP, 3686400, 0);
 static DEFINE_CKEN(pxa25x_nssp, NSSP, 3686400, 0);
 static DEFINE_CKEN(pxa25x_assp, ASSP, 3686400, 0);
 static DEFINE_CKEN(pxa25x_pwm0, PWM0, 3686400, 0);
 static DEFINE_CKEN(pxa25x_pwm1, PWM1, 3686400, 0);
 static DEFINE_CKEN(pxa25x_ac97, AC97, 24576000, 0);
 static DEFINE_CKEN(pxa25x_i2s, I2S, 14745600, 0);
 static DEFINE_CKEN(pxa25x_ficp, FICP, 47923000, 0);

 static struct clk_lookup pxa25x_clkregs[] = {
 	INIT_CLKREG(&clk_pxa25x_lcd, "pxa2xx-fb", NULL),
 	INIT_CLKREG(&clk_pxa25x_ffuart, "pxa2xx-uart.0", NULL),
 	INIT_CLKREG(&clk_pxa25x_btuart, "pxa2xx-uart.1", NULL),
 	INIT_CLKREG(&clk_pxa25x_stuart, "pxa2xx-uart.2", NULL),
 	INIT_CLKREG(&clk_pxa25x_usb, "pxa25x-udc", NULL),
 	INIT_CLKREG(&clk_pxa25x_mmc, "pxa2xx-mci.0", NULL),
 	INIT_CLKREG(&clk_pxa25x_i2c, "pxa2xx-i2c.0", NULL),
 	INIT_CLKREG(&clk_pxa25x_ssp, "pxa25x-ssp.0", NULL),
 	INIT_CLKREG(&clk_pxa25x_nssp, "pxa25x-nssp.1", NULL),
 	INIT_CLKREG(&clk_pxa25x_assp, "pxa25x-nssp.2", NULL),
 	INIT_CLKREG(&clk_pxa25x_pwm0, "pxa25x-pwm.0", NULL),
 	INIT_CLKREG(&clk_pxa25x_pwm1, "pxa25x-pwm.1", NULL),
 	INIT_CLKREG(&clk_pxa25x_i2s, "pxa2xx-i2s", NULL),
 	INIT_CLKREG(&clk_pxa25x_stuart, "pxa2xx-ir", "UARTCLK"),
 	INIT_CLKREG(&clk_pxa25x_ficp, "pxa2xx-ir", "FICPCLK"),
 	INIT_CLKREG(&clk_pxa25x_ac97, NULL, "AC97CLK"),
 	INIT_CLKREG(&clk_pxa25x_gpio11, NULL, "GPIO11_CLK"),
 	INIT_CLKREG(&clk_pxa25x_gpio12, NULL, "GPIO12_CLK"),
 };

 #ifdef CONFIG_PM

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

 /*
  * 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_COUNT
 };


 static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
 {
 	SAVE(CKEN);
 	SAVE(PSTR);
 }

 static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
 {
 	RESTORE(CKEN);
 	RESTORE(PSTR);
 }

 static void pxa25x_cpu_pm_enter(suspend_state_t state)
 {
 	/* Clear reset status */
 	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;

 	switch (state) {
 	case PM_SUSPEND_MEM:
 		pxa25x_cpu_suspend(PWRMODE_SLEEP);
 		break;
 	}
 }

 static int pxa25x_cpu_pm_prepare(void)
 {
 	/* set resume return address */
 	PSPR = virt_to_phys(pxa_cpu_resume);
 	return 0;
 }

 static void pxa25x_cpu_pm_finish(void)
 {
 	/* ensure not to come back here if it wasn't intended */
 	PSPR = 0;
 }

 static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
 	.save_count	= SLEEP_SAVE_COUNT,
 	.valid		= suspend_valid_only_mem,
 	.save		= pxa25x_cpu_pm_save,
 	.restore	= pxa25x_cpu_pm_restore,
 	.enter		= pxa25x_cpu_pm_enter,
 	.prepare	= pxa25x_cpu_pm_prepare,
 	.finish		= pxa25x_cpu_pm_finish,
 };

 static void __init pxa25x_init_pm(void)
 {
 	pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
 }
 #else
 static inline void pxa25x_init_pm(void) {}
 #endif

 /* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
  */

 static int pxa25x_set_wake(unsigned int irq, unsigned int on)
 {
 	int gpio = IRQ_TO_GPIO(irq);
 	uint32_t mask = 0;

 	if (gpio >= 0 && gpio < 85)
 		return gpio_set_wake(gpio, on);

 	if (irq == IRQ_RTCAlrm) {
 		mask = PWER_RTC;
 		goto set_pwer;
 	}

 	return -EINVAL;

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

 	return 0;
 }

 void __init pxa25x_init_irq(void)
 {
 	pxa_init_irq(32, pxa25x_set_wake);
 	pxa_init_gpio(IRQ_GPIO_2_x, 2, 84, pxa25x_set_wake);
 }

 #ifdef CONFIG_CPU_PXA26x
 void __init pxa26x_init_irq(void)
 {
 	pxa_init_irq(32, pxa25x_set_wake);
 	pxa_init_gpio(IRQ_GPIO_2_x, 2, 89, pxa25x_set_wake);
 }
 #endif

 static struct platform_device *pxa25x_devices[] __initdata = {
 	&pxa25x_device_udc,
 	&pxa_device_ffuart,
 	&pxa_device_btuart,
 	&pxa_device_stuart,
 	&pxa_device_i2s,
 	&sa1100_device_rtc,
 	&pxa25x_device_ssp,
 	&pxa25x_device_nssp,
 	&pxa25x_device_assp,
 	&pxa25x_device_pwm0,
 	&pxa25x_device_pwm1,
 };

 static struct sys_device pxa25x_sysdev[] = {
 	{
 		.cls	= &pxa_irq_sysclass,
 	}, {
 		.cls	= &pxa2xx_mfp_sysclass,
 	}, {
 		.cls	= &pxa_gpio_sysclass,
 	},
 };

 static int __init pxa25x_init(void)
 {
 	int i, ret = 0;

 	if (cpu_is_pxa25x()) {

 		reset_status = RCSR;

 		clks_register(pxa25x_clkregs, ARRAY_SIZE(pxa25x_clkregs));

 		if ((ret = pxa_init_dma(IRQ_DMA, 16)))
 			return ret;

 		pxa25x_init_pm();

 		for (i = 0; i < ARRAY_SIZE(pxa25x_sysdev); i++) {
 			ret = sysdev_register(&pxa25x_sysdev[i]);
 			if (ret)
 				pr_err("failed to register sysdev[%d]\n", i);
 		}

 		ret = platform_add_devices(pxa25x_devices,
 					   ARRAY_SIZE(pxa25x_devices));
 		if (ret)
 			return ret;
 	}

 	/* Only add HWUART for PXA255/26x; PXA210/250 do not have it. */
 	if (cpu_is_pxa255()) {
 		clks_register(&pxa25x_hwuart_clkreg, 1);
 		ret = platform_device_register(&pxa_device_hwuart);
 	}

 	return ret;
 }

 postcore_initcall(pxa25x_init);
	/*
	* linux/arch/arm/mach-pxa/pxa25x.c
	*
	* Author: Nicolas Pitre
	* Created: Jun 15, 2001
	* Copyright: MontaVista Software Inc.
	*
	* Code specific to PXA21x/25x/26x variants.
	*
	* 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.
	*
	* Since this file should be linked before any other machine specific file,
	* the __initcall() here will be executed first. This serves as default
	* initialization stuff for PXA machines which can be overridden later if
	* need be.
	*/
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/platform_device.h>
	#include <linux/suspend.h>
	#include <linux/sysdev.h>

	#include <mach/hardware.h>
	#include <mach/irqs.h>
	#include <mach/gpio.h>
	#include <mach/pxa25x.h>
	#include <mach/reset.h>
	#include <mach/pm.h>
	#include <mach/dma.h>

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

	/*
	* Various clock factors driven by the CCCR register.
	*/

	/* Crystal Frequency to Memory Frequency Multiplier (L) */
	static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, };

	/* Memory Frequency to Run Mode Frequency Multiplier (M) */
	static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 };

	/* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */
	/* Note: we store the value N * 2 here. */
	static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 };

	/* Crystal clock */
	#define BASE_CLK 3686400

	/*
	* Get the clock frequency as reflected by CCCR 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 pxa25x_get_clk_frequency_khz(int info)
	{
	unsigned long cccr, turbo;
	unsigned int l, L, m, M, n2, N;

	cccr = CCCR;
	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) );

	l = L_clk_mult[(cccr >> 0) & 0x1f];
	m = M_clk_mult[(cccr >> 5) & 0x03];
	n2 = N2_clk_mult[(cccr >> 7) & 0x07];

	L = l * BASE_CLK;
	M = m * L;
	N = n2 * M / 2;

	if(info)
	{
	L += 5000;
	printk( KERN_INFO "Memory clock: %d.%02dMHz (*%d)\n",
	L / 1000000, (L % 1000000) / 10000, l );
	M += 5000;
	printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
	M / 1000000, (M % 1000000) / 10000, m );
	N += 5000;
	printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
	N / 1000000, (N % 1000000) / 10000, n2 / 2, (n2 % 2) * 5,
	(turbo & 1) ? "" : "in" );
	}

	return (turbo & 1) ? (N/1000) : (M/1000);
	}

	/*
	* Return the current memory clock frequency in units of 10kHz
	*/
	unsigned int pxa25x_get_memclk_frequency_10khz(void)
	{
	return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000;
	}

	static unsigned long clk_pxa25x_lcd_getrate(struct clk *clk)
	{
	return pxa25x_get_memclk_frequency_10khz() * 10000;
	}

	static const struct clkops clk_pxa25x_lcd_ops = {
	.enable = clk_cken_enable,
	.disable = clk_cken_disable,
	.getrate = clk_pxa25x_lcd_getrate,
	};

	static unsigned long gpio12_config_32k[] = {
	GPIO12_32KHz,
	};

	static unsigned long gpio12_config_gpio[] = {
	GPIO12_GPIO,
	};

	static void clk_gpio12_enable(struct clk *clk)
	{
	pxa2xx_mfp_config(gpio12_config_32k, 1);
	}

	static void clk_gpio12_disable(struct clk *clk)
	{
	pxa2xx_mfp_config(gpio12_config_gpio, 1);
	}

	static const struct clkops clk_pxa25x_gpio12_ops = {
	.enable = clk_gpio12_enable,
	.disable = clk_gpio12_disable,
	};

	static unsigned long gpio11_config_3m6[] = {
	GPIO11_3_6MHz,
	};

	static unsigned long gpio11_config_gpio[] = {
	GPIO11_GPIO,
	};

	static void clk_gpio11_enable(struct clk *clk)
	{
	pxa2xx_mfp_config(gpio11_config_3m6, 1);
	}

	static void clk_gpio11_disable(struct clk *clk)
	{
	pxa2xx_mfp_config(gpio11_config_gpio, 1);
	}

	static const struct clkops clk_pxa25x_gpio11_ops = {
	.enable = clk_gpio11_enable,
	.disable = clk_gpio11_disable,
	};

	/*
	* 3.6864MHz -> OST, GPIO, SSP, PWM, PLLs (95.842MHz, 147.456MHz)
	* 95.842MHz -> MMC 19.169MHz, I2C 31.949MHz, FICP 47.923MHz, USB 47.923MHz
	* 147.456MHz -> UART 14.7456MHz, AC97 12.288MHz, I2S 5.672MHz (allegedly)
	*/
	static DEFINE_CKEN(pxa25x_hwuart, HWUART, 14745600, 1);

	static struct clk_lookup pxa25x_hwuart_clkreg =
	INIT_CLKREG(&clk_pxa25x_hwuart, "pxa2xx-uart.3", NULL);

	/*
	* PXA 2xx clock declarations.
	*/
	static DEFINE_CK(pxa25x_lcd, LCD, &clk_pxa25x_lcd_ops);
	static DEFINE_CKEN(pxa25x_ffuart, FFUART, 14745600, 1);
	static DEFINE_CKEN(pxa25x_btuart, BTUART, 14745600, 1);
	static DEFINE_CKEN(pxa25x_stuart, STUART, 14745600, 1);
	static DEFINE_CKEN(pxa25x_usb, USB, 47923000, 5);
	static DEFINE_CLK(pxa25x_gpio11, &clk_pxa25x_gpio11_ops, 3686400, 0);
	static DEFINE_CLK(pxa25x_gpio12, &clk_pxa25x_gpio12_ops, 32768, 0);
	static DEFINE_CKEN(pxa25x_mmc, MMC, 19169000, 0);
	static DEFINE_CKEN(pxa25x_i2c, I2C, 31949000, 0);
	static DEFINE_CKEN(pxa25x_ssp, SSP, 3686400, 0);
	static DEFINE_CKEN(pxa25x_nssp, NSSP, 3686400, 0);
	static DEFINE_CKEN(pxa25x_assp, ASSP, 3686400, 0);
	static DEFINE_CKEN(pxa25x_pwm0, PWM0, 3686400, 0);
	static DEFINE_CKEN(pxa25x_pwm1, PWM1, 3686400, 0);
	static DEFINE_CKEN(pxa25x_ac97, AC97, 24576000, 0);
	static DEFINE_CKEN(pxa25x_i2s, I2S, 14745600, 0);
	static DEFINE_CKEN(pxa25x_ficp, FICP, 47923000, 0);

	static struct clk_lookup pxa25x_clkregs[] = {
	INIT_CLKREG(&clk_pxa25x_lcd, "pxa2xx-fb", NULL),
	INIT_CLKREG(&clk_pxa25x_ffuart, "pxa2xx-uart.0", NULL),
	INIT_CLKREG(&clk_pxa25x_btuart, "pxa2xx-uart.1", NULL),
	INIT_CLKREG(&clk_pxa25x_stuart, "pxa2xx-uart.2", NULL),
	INIT_CLKREG(&clk_pxa25x_usb, "pxa25x-udc", NULL),
	INIT_CLKREG(&clk_pxa25x_mmc, "pxa2xx-mci.0", NULL),
	INIT_CLKREG(&clk_pxa25x_i2c, "pxa2xx-i2c.0", NULL),
	INIT_CLKREG(&clk_pxa25x_ssp, "pxa25x-ssp.0", NULL),
	INIT_CLKREG(&clk_pxa25x_nssp, "pxa25x-nssp.1", NULL),
	INIT_CLKREG(&clk_pxa25x_assp, "pxa25x-nssp.2", NULL),
	INIT_CLKREG(&clk_pxa25x_pwm0, "pxa25x-pwm.0", NULL),
	INIT_CLKREG(&clk_pxa25x_pwm1, "pxa25x-pwm.1", NULL),
	INIT_CLKREG(&clk_pxa25x_i2s, "pxa2xx-i2s", NULL),
	INIT_CLKREG(&clk_pxa25x_stuart, "pxa2xx-ir", "UARTCLK"),
	INIT_CLKREG(&clk_pxa25x_ficp, "pxa2xx-ir", "FICPCLK"),
	INIT_CLKREG(&clk_pxa25x_ac97, NULL, "AC97CLK"),
	INIT_CLKREG(&clk_pxa25x_gpio11, NULL, "GPIO11_CLK"),
	INIT_CLKREG(&clk_pxa25x_gpio12, NULL, "GPIO12_CLK"),
	};

	#ifdef CONFIG_PM

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

	/*
	* 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_COUNT
	};


	static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
	{
	SAVE(CKEN);
	SAVE(PSTR);
	}

	static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
	{
	RESTORE(CKEN);
	RESTORE(PSTR);
	}

	static void pxa25x_cpu_pm_enter(suspend_state_t state)
	{
	/* Clear reset status */
	RCSR = RCSR_HWR \| RCSR_WDR \| RCSR_SMR \| RCSR_GPR;

	switch (state) {
	case PM_SUSPEND_MEM:
	pxa25x_cpu_suspend(PWRMODE_SLEEP);
	break;
	}
	}

	static int pxa25x_cpu_pm_prepare(void)
	{
	/* set resume return address */
	PSPR = virt_to_phys(pxa_cpu_resume);
	return 0;
	}

	static void pxa25x_cpu_pm_finish(void)
	{
	/* ensure not to come back here if it wasn't intended */
	PSPR = 0;
	}

	static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
	.save_count = SLEEP_SAVE_COUNT,
	.valid = suspend_valid_only_mem,
	.save = pxa25x_cpu_pm_save,
	.restore = pxa25x_cpu_pm_restore,
	.enter = pxa25x_cpu_pm_enter,
	.prepare = pxa25x_cpu_pm_prepare,
	.finish = pxa25x_cpu_pm_finish,
	};

	static void __init pxa25x_init_pm(void)
	{
	pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
	}
	#else
	static inline void pxa25x_init_pm(void) {}
	#endif

	/* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
	*/

	static int pxa25x_set_wake(unsigned int irq, unsigned int on)
	{
	int gpio = IRQ_TO_GPIO(irq);
	uint32_t mask = 0;

	if (gpio >= 0 && gpio < 85)
	return gpio_set_wake(gpio, on);

	if (irq == IRQ_RTCAlrm) {
	mask = PWER_RTC;
	goto set_pwer;
	}

	return -EINVAL;

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

	return 0;
	}

	void __init pxa25x_init_irq(void)
	{
	pxa_init_irq(32, pxa25x_set_wake);
	pxa_init_gpio(IRQ_GPIO_2_x, 2, 84, pxa25x_set_wake);
	}

	#ifdef CONFIG_CPU_PXA26x
	void __init pxa26x_init_irq(void)
	{
	pxa_init_irq(32, pxa25x_set_wake);
	pxa_init_gpio(IRQ_GPIO_2_x, 2, 89, pxa25x_set_wake);
	}
	#endif

	static struct platform_device *pxa25x_devices[] __initdata = {
	&pxa25x_device_udc,
	&pxa_device_ffuart,
	&pxa_device_btuart,
	&pxa_device_stuart,
	&pxa_device_i2s,
	&sa1100_device_rtc,
	&pxa25x_device_ssp,
	&pxa25x_device_nssp,
	&pxa25x_device_assp,
	&pxa25x_device_pwm0,
	&pxa25x_device_pwm1,
	};

	static struct sys_device pxa25x_sysdev[] = {
	{
	.cls = &pxa_irq_sysclass,
	}, {
	.cls = &pxa2xx_mfp_sysclass,
	}, {
	.cls = &pxa_gpio_sysclass,
	},
	};

	static int __init pxa25x_init(void)
	{
	int i, ret = 0;

	if (cpu_is_pxa25x()) {

	reset_status = RCSR;

	clks_register(pxa25x_clkregs, ARRAY_SIZE(pxa25x_clkregs));

	if ((ret = pxa_init_dma(IRQ_DMA, 16)))
	return ret;

	pxa25x_init_pm();

	for (i = 0; i < ARRAY_SIZE(pxa25x_sysdev); i++) {
	ret = sysdev_register(&pxa25x_sysdev[i]);
	if (ret)
	pr_err("failed to register sysdev[%d]\n", i);
	}

	ret = platform_add_devices(pxa25x_devices,
	ARRAY_SIZE(pxa25x_devices));
	if (ret)
	return ret;
	}

	/* Only add HWUART for PXA255/26x; PXA210/250 do not have it. */
	if (cpu_is_pxa255()) {
	clks_register(&pxa25x_hwuart_clkreg, 1);
	ret = platform_device_register(&pxa_device_hwuart);
	}

	return ret;
	}

	postcore_initcall(pxa25x_init);