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add flash locking code

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SVN-Revision: 16311
This commit is contained in:
Gabor Juhos 2009-06-03 18:17:07 +00:00
parent 5b72dc3d8f
commit b0acbe709c
2 changed files with 27 additions and 1 deletions
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24
target/linux/ar71xx/files/arch/mips/ar71xx/ar71xx.c
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@ -1,7 +1,7 @@
/*
* AR71xx SoC routines
*
* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
@ -12,9 +12,13 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/mutex.h>
#include <asm/mach-ar71xx/ar71xx.h>
static DEFINE_MUTEX(ar71xx_flash_mutex);
static int ar71xx_flash_lock_enabled;
void __iomem *ar71xx_ddr_base;
EXPORT_SYMBOL_GPL(ar71xx_ddr_base);
@ -98,3 +102,21 @@ void ar71xx_ddr_flush(u32 reg)
}
EXPORT_SYMBOL_GPL(ar71xx_ddr_flush);
void __init ar71xx_flash_lock_enable(void)
{
ar71xx_flash_lock_enabled = 1;
}
void ar71xx_flash_acquire(void)
{
if (ar71xx_flash_lock_enabled)
mutex_lock(&ar71xx_flash_mutex);
}
EXPORT_SYMBOL_GPL(ar71xx_flash_acquire);
void ar71xx_flash_release(void)
{
if (ar71xx_flash_lock_enabled)
mutex_unlock(&ar71xx_flash_mutex);
}
EXPORT_SYMBOL_GPL(ar71xx_flash_release);

4
target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
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@ -422,6 +422,10 @@ void ar71xx_device_start(u32 mask);
#define SPI_IOC_CS2 SPI_IOC_CS(2)
#define SPI_IOC_CS_ALL (SPI_IOC_CS0 | SPI_IOC_CS1 | SPI_IOC_CS2)
void ar71xx_flash_lock_enable(void) __init;
void ar71xx_flash_acquire(void);
void ar71xx_flash_release(void);
/*
* MII_CTRL block
*/