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Commit fdfde24e authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Kumar Gala
Browse files

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



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: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent 4c1fba44

arch/powerpc/sysdev/qe_lib/qe.c

+34 −0
Original line number Diff line number Diff line
@@ -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) */