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powerpc/qe: Implement QE driver for handling resume on MPC85xx

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So far the driver is used to reset QE upon resume, which is needed on
85xx. Later we can move some QE initialization steps into probe().

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Anton Vorontsov 2009-09-16 01:43:55 +04:00 committed by Kumar Gala
parent 4c1fba4429
commit fdfde24e10
1 changed files with 34 additions and 0 deletions
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34
arch/powerpc/sysdev/qe_lib/qe.c
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@ -27,6 +27,8 @@
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/crc32.h>
#include <linux/mod_devicetable.h>
#include <linux/of_platform.h>
#include <asm/irq.h>
#include <asm/page.h>
#include <asm/pgtable.h>
@ -647,3 +649,35 @@ unsigned int qe_get_num_of_snums(void)
return num_of_snums;
}
EXPORT_SYMBOL(qe_get_num_of_snums);
#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC_85xx)
static int qe_resume(struct of_device *ofdev)
{
if (!qe_alive_during_sleep())
qe_reset();
return 0;
}
static int qe_probe(struct of_device *ofdev, const struct of_device_id *id)
{
return 0;
}
static const struct of_device_id qe_ids[] = {
{ .compatible = "fsl,qe", },
{ },
};
static struct of_platform_driver qe_driver = {
.driver.name = "fsl-qe",
.match_table = qe_ids,
.probe = qe_probe,
.resume = qe_resume,
};
static int __init qe_drv_init(void)
{
return of_register_platform_driver(&qe_driver);
}
device_initcall(qe_drv_init);
#endif /* defined(CONFIG_SUSPEND) && defined(CONFIG_PPC_85xx) */