Commit 95e896c3 authored by Grant Likely's avatar Grant Likely Committed by Jens Axboe
Browse files

Sysace: Add of_platform_bus binding 



The of_platform bus binding is needed to make the device driver usable
under arch/powerpc.

Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 32f6fff4

drivers/block/xsysace.c

+89 −0
Original line number Diff line number Diff line
@@ -91,6 +91,10 @@ 
#include <linux/blkdev.h>

#include <linux/hdreg.h>

#include <linux/platform_device.h>

#if defined(CONFIG_OF)

#include <linux/of_device.h>

#include <linux/of_platform.h>

#endif



MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");

MODULE_DESCRIPTION("Xilinx SystemACE device driver");
@@ -1157,6 +1161,85 @@ static struct platform_driver ace_platform_driver = { 
	},

};



/* ---------------------------------------------------------------------

 * OF_Platform Bus Support

 */



#if defined(CONFIG_OF)

static int __devinit

ace_of_probe(struct of_device *op, const struct of_device_id *match)

{

	struct resource res;

	unsigned long physaddr;

	const u32 *id;

	int irq, bus_width, rc;



	dev_dbg(&op->dev, "ace_of_probe(%p, %p)\n", op, match);



	/* device id */

	id = of_get_property(op->node, "port-number", NULL);



	/* physaddr */

	rc = of_address_to_resource(op->node, 0, &res);

	if (rc) {

		dev_err(&op->dev, "invalid address\n");

		return rc;

	}

	physaddr = res.start;



	/* irq */

	irq = irq_of_parse_and_map(op->node, 0);



	/* bus width */

	bus_width = ACE_BUS_WIDTH_16;

	if (of_find_property(op->node, "8-bit", NULL))

		bus_width = ACE_BUS_WIDTH_8;



	/* Call the bus-independant setup code */

	return ace_alloc(&op->dev, id ? *id : 0, physaddr, irq, bus_width);

}



static int __devexit ace_of_remove(struct of_device *op)

{

	ace_free(&op->dev);

	return 0;

}



/* Match table for of_platform binding */

static struct of_device_id __devinit ace_of_match[] = {

	{ .compatible = "xilinx,xsysace", },

	{},

};

MODULE_DEVICE_TABLE(of, ace_of_match);



static struct of_platform_driver ace_of_driver = {

	.owner = THIS_MODULE,

	.name = "xsysace",

	.match_table = ace_of_match,

	.probe = ace_of_probe,

	.remove = __devexit_p(ace_of_remove),

	.driver = {

		.name = "xsysace",

	},

};



/* Registration helpers to keep the number of #ifdefs to a minimum */

static inline int __init ace_of_register(void)

{

	pr_debug("xsysace: registering OF binding\n");

	return of_register_platform_driver(&ace_of_driver);

}



static inline void __exit ace_of_unregister(void)

{

	of_unregister_platform_driver(&ace_of_driver);

}

#else /* CONFIG_OF */

/* CONFIG_OF not enabled; do nothing helpers */

static inline int __init ace_of_register(void) { return 0; }

static inline void __exit ace_of_unregister(void) { }

#endif /* CONFIG_OF */



/* ---------------------------------------------------------------------

 * Module init/exit routines

 */
@@ -1170,6 +1253,9 @@ static int __init ace_init(void) 
		goto err_blk;

	}



	if ((rc = ace_of_register()) != 0)

		goto err_of;



	pr_debug("xsysace: registering platform binding\n");

	if ((rc = platform_driver_register(&ace_platform_driver)) != 0)

		goto err_plat;
@@ -1178,6 +1264,8 @@ static int __init ace_init(void) 
	return 0;



      err_plat:

	ace_of_unregister();

      err_of:

	unregister_blkdev(ace_major, "xsysace");

      err_blk:

	printk(KERN_ERR "xsysace: registration failed; err=%i\n", rc);
@@ -1188,6 +1276,7 @@ static void __exit ace_exit(void) 
{

	pr_debug("Unregistering Xilinx SystemACE driver\n");

	platform_driver_unregister(&ace_platform_driver);

	ace_of_unregister();

	unregister_blkdev(ace_major, "xsysace");

}