[POWERPC] XilinxFB: add of_platform bus binding
Adds the of_platform bus binding to the xilinxfb driver. Needed to use framebuffer devices described in the OF device tree (used by arch/powerpc). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Andrei Konovalov <akonovalov@ru.mvista.com>
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@ -6,9 +6,12 @@
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* Author: MontaVista Software, Inc.
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* source@mvista.com
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*
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* 2002-2007 (c) MontaVista Software, Inc. This file is licensed under the
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* terms of the GNU General Public License version 2. This program is licensed
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* "as is" without any warranty of any kind, whether express or implied.
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* 2002-2007 (c) MontaVista Software, Inc.
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* 2007 (c) Secret Lab Technologies, Ltd.
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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/*
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@ -29,7 +32,10 @@
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#include <linux/init.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#if defined(CONFIG_OF)
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#endif
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#include <asm/io.h>
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#include <linux/xilinxfb.h>
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@ -384,20 +390,103 @@ static struct platform_driver xilinxfb_platform_driver = {
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},
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};
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/* ---------------------------------------------------------------------
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* OF bus binding
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*/
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#if defined(CONFIG_OF)
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static int __devinit
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xilinxfb_of_probe(struct of_device *op, const struct of_device_id *match)
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{
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struct resource res;
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const u32 *prop;
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int width = 0, height = 0, rotate = 0;
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int size, rc;
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dev_dbg(&op->dev, "xilinxfb_of_probe(%p, %p)\n", op, match);
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rc = of_address_to_resource(op->node, 0, &res);
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if (rc) {
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dev_err(&op->dev, "invalid address\n");
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return rc;
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}
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prop = of_get_property(op->node, "display-number", &size);
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if ((prop) && (size >= sizeof(u32)*2)) {
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width = prop[0];
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height = prop[1];
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}
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if (of_find_property(op->node, "rotate-display", NULL))
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rotate = 1;
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return xilinxfb_assign(&op->dev, res.start, width, height, rotate);
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}
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static int __devexit xilinxfb_of_remove(struct of_device *op)
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{
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return xilinxfb_release(&op->dev);
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}
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/* Match table for of_platform binding */
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static struct of_device_id __devinit xilinxfb_of_match[] = {
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{ .compatible = "xilinx,ml300-fb", },
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{},
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};
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MODULE_DEVICE_TABLE(of, xilinxfb_of_match);
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static struct of_platform_driver xilinxfb_of_driver = {
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.owner = THIS_MODULE,
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.name = DRIVER_NAME,
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.match_table = xilinxfb_of_match,
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.probe = xilinxfb_of_probe,
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.remove = __devexit_p(xilinxfb_of_remove),
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.driver = {
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.name = DRIVER_NAME,
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},
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};
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/* Registration helpers to keep the number of #ifdefs to a minimum */
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static inline int __init xilinxfb_of_register(void)
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{
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pr_debug("xilinxfb: calling of_register_platform_driver()\n");
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return of_register_platform_driver(&xilinxfb_of_driver);
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}
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static inline void __exit xilinxfb_of_unregister(void)
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{
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of_unregister_platform_driver(&xilinxfb_of_driver);
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}
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#else /* CONFIG_OF */
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/* CONFIG_OF not enabled; do nothing helpers */
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static inline int __init xilinxfb_of_register(void) { return 0; }
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static inline void __exit xilinxfb_of_unregister(void) { }
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#endif /* CONFIG_OF */
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/* ---------------------------------------------------------------------
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* Module setup and teardown
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*/
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static int __init
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xilinxfb_init(void)
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{
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/*
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* No kernel boot options used,
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* so we just need to register the driver
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*/
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return platform_driver_register(&xilinxfb_platform_driver);
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int rc;
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rc = xilinxfb_of_register();
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if (rc)
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return rc;
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rc = platform_driver_register(&xilinxfb_platform_driver);
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if (rc)
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xilinxfb_of_unregister();
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return rc;
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}
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static void __exit
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xilinxfb_cleanup(void)
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{
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platform_driver_unregister(&xilinxfb_platform_driver);
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xilinxfb_of_unregister();
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}
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module_init(xilinxfb_init);
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