2005-04-16 16:20:36 -06:00
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/*
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* linux/arch/arm/mach-pxa/pxa27x.c
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*
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* Author: Nicolas Pitre
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* Created: Nov 05, 2002
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* Copyright: MontaVista Software Inc.
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*
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* Code specific to PXA27x aka Bulverde.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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2007-10-18 04:04:39 -06:00
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#include <linux/suspend.h>
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2005-10-29 12:07:23 -06:00
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#include <linux/platform_device.h>
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2008-01-28 16:00:02 -07:00
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#include <linux/sysdev.h>
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2005-04-16 16:20:36 -06:00
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2008-08-04 03:41:28 -06:00
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#include <asm/arch/hardware.h>
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2005-04-16 16:20:36 -06:00
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#include <asm/irq.h>
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2007-06-21 21:14:09 -06:00
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#include <asm/arch/irqs.h>
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2005-04-16 16:20:36 -06:00
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#include <asm/arch/pxa-regs.h>
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2008-01-14 10:02:33 -07:00
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#include <asm/arch/pxa2xx-regs.h>
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2008-03-10 19:46:28 -06:00
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#include <asm/arch/mfp-pxa27x.h>
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2005-11-12 07:22:11 -07:00
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#include <asm/arch/ohci.h>
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2007-05-15 04:16:10 -06:00
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#include <asm/arch/pm.h>
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2007-06-21 22:40:17 -06:00
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#include <asm/arch/dma.h>
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2008-01-27 10:14:50 -07:00
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#include <asm/arch/i2c.h>
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2005-04-16 16:20:36 -06:00
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#include "generic.h"
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2007-05-15 08:39:36 -06:00
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#include "devices.h"
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2007-08-20 03:18:02 -06:00
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#include "clock.h"
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2005-04-16 16:20:36 -06:00
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/* Crystal clock: 13MHz */
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#define BASE_CLK 13000000
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/*
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* Get the clock frequency as reflected by CCSR and the turbo flag.
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* We assume these values have been applied via a fcs.
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* If info is not 0 we also display the current settings.
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*/
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2007-08-20 03:07:44 -06:00
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unsigned int pxa27x_get_clk_frequency_khz(int info)
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2005-04-16 16:20:36 -06:00
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{
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unsigned long ccsr, clkcfg;
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unsigned int l, L, m, M, n2, N, S;
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int cccr_a, t, ht, b;
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ccsr = CCSR;
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cccr_a = CCCR & (1 << 25);
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/* Read clkcfg register: it has turbo, b, half-turbo (and f) */
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asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
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2006-02-01 12:25:59 -07:00
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t = clkcfg & (1 << 0);
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2005-04-16 16:20:36 -06:00
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ht = clkcfg & (1 << 2);
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b = clkcfg & (1 << 3);
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l = ccsr & 0x1f;
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n2 = (ccsr>>7) & 0xf;
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m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
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L = l * BASE_CLK;
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N = (L * n2) / 2;
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M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
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S = (b) ? L : (L/2);
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if (info) {
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printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
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L / 1000000, (L % 1000000) / 10000, l );
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printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
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N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
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(t) ? "" : "in" );
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printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
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M / 1000000, (M % 1000000) / 10000, m );
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printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
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S / 1000000, (S % 1000000) / 10000 );
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}
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return (t) ? (N/1000) : (L/1000);
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}
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/*
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* Return the current mem clock frequency in units of 10kHz as
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* reflected by CCCR[A], B, and L
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*/
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2007-08-20 03:07:44 -06:00
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unsigned int pxa27x_get_memclk_frequency_10khz(void)
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2005-04-16 16:20:36 -06:00
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{
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unsigned long ccsr, clkcfg;
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unsigned int l, L, m, M;
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int cccr_a, b;
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ccsr = CCSR;
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cccr_a = CCCR & (1 << 25);
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/* Read clkcfg register: it has turbo, b, half-turbo (and f) */
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asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
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b = clkcfg & (1 << 3);
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l = ccsr & 0x1f;
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m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
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L = l * BASE_CLK;
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M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
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return (M / 10000);
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}
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/*
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* Return the current LCD clock frequency in units of 10kHz as
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*/
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2007-08-20 03:34:37 -06:00
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static unsigned int pxa27x_get_lcdclk_frequency_10khz(void)
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2005-04-16 16:20:36 -06:00
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{
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unsigned long ccsr;
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unsigned int l, L, k, K;
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ccsr = CCSR;
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l = ccsr & 0x1f;
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k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;
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L = l * BASE_CLK;
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K = L / k;
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return (K / 10000);
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}
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2007-08-20 03:18:02 -06:00
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static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
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{
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return pxa27x_get_lcdclk_frequency_10khz() * 10000;
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}
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static const struct clkops clk_pxa27x_lcd_ops = {
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.enable = clk_cken_enable,
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.disable = clk_cken_disable,
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.getrate = clk_pxa27x_lcd_getrate,
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};
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static struct clk pxa27x_clks[] = {
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INIT_CK("LCDCLK", LCD, &clk_pxa27x_lcd_ops, &pxa_device_fb.dev),
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INIT_CK("CAMCLK", CAMERA, &clk_pxa27x_lcd_ops, NULL),
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INIT_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
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INIT_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
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2007-09-02 10:08:42 -06:00
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INIT_CKEN("UARTCLK", STUART, 14857000, 1, NULL),
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2007-08-20 03:18:02 -06:00
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INIT_CKEN("I2SCLK", I2S, 14682000, 0, &pxa_device_i2s.dev),
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INIT_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev),
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2008-06-22 16:36:39 -06:00
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INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa27x_device_udc.dev),
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2007-08-20 03:18:02 -06:00
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INIT_CKEN("MMCCLK", MMC, 19500000, 0, &pxa_device_mci.dev),
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INIT_CKEN("FICPCLK", FICP, 48000000, 0, &pxa_device_ficp.dev),
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2007-11-19 17:35:08 -07:00
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INIT_CKEN("USBCLK", USBHOST, 48000000, 0, &pxa27x_device_ohci.dev),
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2007-08-20 03:18:02 -06:00
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INIT_CKEN("I2CCLK", PWRI2C, 13000000, 0, &pxa27x_device_i2c_power.dev),
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2008-01-22 22:39:13 -07:00
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INIT_CKEN("KBDCLK", KEYPAD, 32768, 0, &pxa27x_device_keypad.dev),
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2007-08-20 03:18:02 -06:00
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2007-12-10 02:54:36 -07:00
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INIT_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
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INIT_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
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INIT_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
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2008-04-13 14:44:04 -06:00
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INIT_CKEN("PWMCLK", PWM0, 13000000, 0, &pxa27x_device_pwm0.dev),
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INIT_CKEN("PWMCLK", PWM1, 13000000, 0, &pxa27x_device_pwm1.dev),
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2007-12-10 02:54:36 -07:00
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2008-03-04 03:14:22 -07:00
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INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
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INIT_CKEN("AC97CONFCLK", AC97CONF, 24576000, 0, NULL),
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2007-08-20 03:18:02 -06:00
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/*
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INIT_CKEN("MSLCLK", MSL, 48000000, 0, NULL),
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INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL),
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INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL),
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INIT_CKEN("IMCLK", IM, 0, 0, NULL),
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INIT_CKEN("MEMCLK", MEMC, 0, 0, NULL),
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*/
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};
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2005-06-13 15:35:41 -06:00
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#ifdef CONFIG_PM
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2007-07-18 04:38:45 -06:00
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#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
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#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
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/*
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* List of global PXA peripheral registers to preserve.
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* More ones like CP and general purpose register values are preserved
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* with the stack pointer in sleep.S.
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*/
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2008-05-02 14:17:06 -06:00
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enum { SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,
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2007-07-18 04:38:45 -06:00
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SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
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SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
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SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U,
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SLEEP_SAVE_GAFR3_L, SLEEP_SAVE_GAFR3_U,
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SLEEP_SAVE_PSTR,
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SLEEP_SAVE_CKEN,
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SLEEP_SAVE_MDREFR,
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SLEEP_SAVE_PWER, SLEEP_SAVE_PCFR, SLEEP_SAVE_PRER,
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SLEEP_SAVE_PFER, SLEEP_SAVE_PKWR,
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2008-05-02 14:17:06 -06:00
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SLEEP_SAVE_COUNT
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2007-07-18 04:38:45 -06:00
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};
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void pxa27x_cpu_pm_save(unsigned long *sleep_save)
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{
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SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); SAVE(PGSR3);
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SAVE(GAFR0_L); SAVE(GAFR0_U);
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SAVE(GAFR1_L); SAVE(GAFR1_U);
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SAVE(GAFR2_L); SAVE(GAFR2_U);
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SAVE(GAFR3_L); SAVE(GAFR3_U);
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SAVE(MDREFR);
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SAVE(PWER); SAVE(PCFR); SAVE(PRER);
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SAVE(PFER); SAVE(PKWR);
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SAVE(CKEN);
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SAVE(PSTR);
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}
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void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
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{
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/* ensure not to come back here if it wasn't intended */
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PSPR = 0;
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/* restore registers */
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RESTORE(GAFR0_L); RESTORE(GAFR0_U);
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RESTORE(GAFR1_L); RESTORE(GAFR1_U);
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RESTORE(GAFR2_L); RESTORE(GAFR2_U);
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RESTORE(GAFR3_L); RESTORE(GAFR3_U);
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RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); RESTORE(PGSR3);
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RESTORE(MDREFR);
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RESTORE(PWER); RESTORE(PCFR); RESTORE(PRER);
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RESTORE(PFER); RESTORE(PKWR);
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PSSR = PSSR_RDH | PSSR_PH;
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RESTORE(CKEN);
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RESTORE(PSTR);
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}
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void pxa27x_cpu_pm_enter(suspend_state_t state)
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2005-06-03 13:52:27 -06:00
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{
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extern void pxa_cpu_standby(void);
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/* ensure voltage-change sequencer not initiated, which hangs */
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PCFR &= ~PCFR_FVC;
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/* Clear edge-detect status register. */
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PEDR = 0xDF12FE1B;
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2008-05-08 09:50:39 -06:00
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/* Clear reset status */
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RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
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2005-06-03 13:52:27 -06:00
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switch (state) {
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2005-07-01 04:27:05 -06:00
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case PM_SUSPEND_STANDBY:
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pxa_cpu_standby();
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break;
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2005-06-03 13:52:27 -06:00
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case PM_SUSPEND_MEM:
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/* set resume return address */
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PSPR = virt_to_phys(pxa_cpu_resume);
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2007-07-18 04:40:13 -06:00
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pxa27x_cpu_suspend(PWRMODE_SLEEP);
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2005-06-03 13:52:27 -06:00
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break;
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}
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}
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2005-04-16 16:20:36 -06:00
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2007-07-18 04:38:45 -06:00
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static int pxa27x_cpu_pm_valid(suspend_state_t state)
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2007-05-15 04:22:48 -06:00
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{
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return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
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}
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2007-07-18 04:38:45 -06:00
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static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
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2008-05-02 14:17:06 -06:00
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.save_count = SLEEP_SAVE_COUNT,
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2007-07-18 04:38:45 -06:00
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.save = pxa27x_cpu_pm_save,
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.restore = pxa27x_cpu_pm_restore,
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.valid = pxa27x_cpu_pm_valid,
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.enter = pxa27x_cpu_pm_enter,
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2007-05-15 04:16:10 -06:00
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};
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2007-07-18 04:38:45 -06:00
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static void __init pxa27x_init_pm(void)
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{
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pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
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}
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2008-01-01 17:24:49 -07:00
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#else
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static inline void pxa27x_init_pm(void) {}
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2005-06-13 15:35:41 -06:00
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#endif
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2007-08-29 03:22:17 -06:00
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/* PXA27x: Various gpios can issue wakeup events. This logic only
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* handles the simple cases, not the WEMUX2 and WEMUX3 options
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*/
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static int pxa27x_set_wake(unsigned int irq, unsigned int on)
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{
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int gpio = IRQ_TO_GPIO(irq);
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uint32_t mask;
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|
|
2008-03-10 19:46:28 -06:00
|
|
|
if (gpio >= 0 && gpio < 128)
|
|
|
|
return gpio_set_wake(gpio, on);
|
2007-08-29 03:22:17 -06:00
|
|
|
|
2008-03-10 19:46:28 -06:00
|
|
|
if (irq == IRQ_KEYPAD)
|
|
|
|
return keypad_set_wake(on);
|
2007-08-29 03:22:17 -06:00
|
|
|
|
|
|
|
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)
|
|
|
|
{
|
2008-03-03 23:19:58 -07:00
|
|
|
pxa_init_irq(34, pxa27x_set_wake);
|
|
|
|
pxa_init_gpio(128, pxa27x_set_wake);
|
2007-08-29 03:22:17 -06:00
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* device registration specific to PXA27x.
|
|
|
|
*/
|
|
|
|
|
2007-05-15 03:39:49 -06:00
|
|
|
static struct resource i2c_power_resources[] = {
|
|
|
|
{
|
|
|
|
.start = 0x40f00180,
|
|
|
|
.end = 0x40f001a3,
|
|
|
|
.flags = IORESOURCE_MEM,
|
|
|
|
}, {
|
|
|
|
.start = IRQ_PWRI2C,
|
|
|
|
.end = IRQ_PWRI2C,
|
|
|
|
.flags = IORESOURCE_IRQ,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2007-08-20 03:09:18 -06:00
|
|
|
struct platform_device pxa27x_device_i2c_power = {
|
2007-05-15 03:39:49 -06:00
|
|
|
.name = "pxa2xx-i2c",
|
|
|
|
.id = 1,
|
|
|
|
.resource = i2c_power_resources,
|
|
|
|
.num_resources = ARRAY_SIZE(i2c_power_resources),
|
|
|
|
};
|
|
|
|
|
2008-01-27 10:14:50 -07:00
|
|
|
void __init pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info)
|
|
|
|
{
|
2008-06-02 11:49:27 -06:00
|
|
|
local_irq_disable();
|
|
|
|
PCFR |= PCFR_PI2CEN;
|
|
|
|
local_irq_enable();
|
2008-01-27 10:14:50 -07:00
|
|
|
pxa27x_device_i2c_power.dev.platform_data = info;
|
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
static struct platform_device *devices[] __initdata = {
|
2008-06-22 16:36:39 -06:00
|
|
|
&pxa27x_device_udc,
|
2007-07-17 03:45:58 -06:00
|
|
|
&pxa_device_ffuart,
|
|
|
|
&pxa_device_btuart,
|
|
|
|
&pxa_device_stuart,
|
|
|
|
&pxa_device_i2s,
|
|
|
|
&pxa_device_rtc,
|
|
|
|
&pxa27x_device_i2c_power,
|
2007-12-10 02:54:36 -07:00
|
|
|
&pxa27x_device_ssp1,
|
|
|
|
&pxa27x_device_ssp2,
|
|
|
|
&pxa27x_device_ssp3,
|
2008-04-13 14:44:04 -06:00
|
|
|
&pxa27x_device_pwm0,
|
|
|
|
&pxa27x_device_pwm1,
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
2008-01-28 16:00:02 -07:00
|
|
|
static struct sys_device pxa27x_sysdev[] = {
|
|
|
|
{
|
|
|
|
.cls = &pxa_irq_sysclass,
|
2008-01-28 16:00:02 -07:00
|
|
|
}, {
|
|
|
|
.cls = &pxa_gpio_sysclass,
|
2008-01-28 16:00:02 -07:00
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
static int __init pxa27x_init(void)
|
|
|
|
{
|
2008-01-28 16:00:02 -07:00
|
|
|
int i, ret = 0;
|
|
|
|
|
2007-05-15 04:16:10 -06:00
|
|
|
if (cpu_is_pxa27x()) {
|
2007-08-20 03:18:02 -06:00
|
|
|
clks_register(pxa27x_clks, ARRAY_SIZE(pxa27x_clks));
|
|
|
|
|
2007-06-21 22:40:17 -06:00
|
|
|
if ((ret = pxa_init_dma(32)))
|
|
|
|
return ret;
|
2008-01-01 17:24:49 -07:00
|
|
|
|
2007-07-18 04:38:45 -06:00
|
|
|
pxa27x_init_pm();
|
2008-01-01 17:24:49 -07:00
|
|
|
|
2008-01-28 16:00:02 -07:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
2007-05-15 04:16:10 -06:00
|
|
|
ret = platform_add_devices(devices, ARRAY_SIZE(devices));
|
|
|
|
}
|
2008-01-28 16:00:02 -07:00
|
|
|
|
2007-05-15 04:16:10 -06:00
|
|
|
return ret;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-04-19 03:59:24 -06:00
|
|
|
postcore_initcall(pxa27x_init);
|