OpenSDV
/
original_kernel
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ARM: SAMSUNG: Add support for interrupt wakeup-sources 

Add support for wakeup-mask style interrupts that share a
single mask register for various different interrupts. This
registers a set of interrupt->bit mappings and the register
they belong to.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2010-05-20 14:05:33 +09:00
parent 1f1f584c9a
commit 0317e52e04
4 changed files with 101 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm/plat-samsung/Kconfig
View File

@ -285,4 +285,12 @@ config SAMSUNG_PM_CHECK_CHUNKSIZE
See <file:Documentation/arm/Samsung-S3C24XX/Suspend.txt>
config SAMSUNG_WAKEMASK
bool
depends on PM
help
Compile support for wakeup-mask controls found on the S3C6400
and above. This code allows a set of interrupt to wakeup-mask
mappings. See <plat/wakeup-mask.h>
endif

2
arch/arm/plat-samsung/Makefile
View File

@ -61,6 +61,8 @@ obj-$(CONFIG_PM) += pm.o
obj-$(CONFIG_PM) += pm-gpio.o
obj-$(CONFIG_SAMSUNG_PM_CHECK) += pm-check.o
obj-$(CONFIG_SAMSUNG_WAKEMASK) += wakeup-mask.o
# PWM support
obj-$(CONFIG_HAVE_PWM) += pwm.o

44
arch/arm/plat-samsung/include/plat/wakeup-mask.h Normal file
View File

@ -0,0 +1,44 @@
/* arch/arm/plat-samsung/include/plat/wakeup-mask.h
*
* Copyright 2010 Ben Dooks <ben-linux@fluff.org>
*
* Support for wakeup mask interrupts on newer SoCs
*
* 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.
*
*/
#ifndef __PLAT_WAKEUP_MASK_H
#define __PLAT_WAKEUP_MASK_H __file__
/* if no irq yet defined, but still want to mask */
#define NO_WAKEUP_IRQ (0x90000000)
/**
* struct samsung_wakeup_mask - wakeup mask information
* @irq: The interrupt associated with this wakeup.
* @bit: The bit, as a (1 << bitno) controlling this source.
*/
struct samsung_wakeup_mask {
unsigned int irq;
u32 bit;
};
/**
* samsung_sync_wakemask - sync wakeup mask information for pm
* @reg: The register that is used.
* @masks: The list of masks to use.
* @nr_masks: The number of entries pointed to buy @masks.
*
* Synchronise the wakeup mask information at suspend time from the list
* of interrupts and control bits in @masks. We do this at suspend time
* as overriding the relevant irq chips is harder and the register is only
* required to be correct before we enter sleep.
*/
extern void samsung_sync_wakemask(void __iomem *reg,
struct samsung_wakeup_mask *masks,
int nr_masks);
#endif /* __PLAT_WAKEUP_MASK_H */

47
arch/arm/plat-samsung/wakeup-mask.c Normal file
View File

@ -0,0 +1,47 @@
/* arch/arm/plat-samsung/wakeup-mask.c
*
* Copyright 2010 Ben Dooks <ben-linux@fluff.org>
*
* Support for wakeup mask interrupts on newer SoCs
*
* 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/kernel.h>
#include <linux/spinlock.h>
#include <linux/sysdev.h>
#include <linux/types.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <plat/wakeup-mask.h>
#include <plat/pm.h>
void samsung_sync_wakemask(void __iomem *reg,
struct samsung_wakeup_mask *mask, int nr_mask)
{
struct irq_desc *desc;
u32 val;
val = __raw_readl(reg);
for (; nr_mask > 0; nr_mask--, mask++) {
if (mask->irq == NO_WAKEUP_IRQ) {
val |= mask->bit;
continue;
}
desc = irq_to_desc(mask->irq);
/* bit of a liberty to read this directly from irq_desc. */
if (desc->wake_depth > 0)
val &= ~mask->bit;
else
val |= mask->bit;
}
printk(KERN_INFO "wakemask %08x => %08x\n", __raw_readl(reg), val);
__raw_writel(val, reg);
}