forked from luck/tmp_suning_uos_patched
771669349e
This patch adds in a platform device driver using the xilinx_spi common module. Tested-by: John Linn <John.Linn@xilinx.com> Signed-off-by: Richard Röjfors <richard.rojfors@mocean-labs.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/*
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* Support for Xilinx SPI platform devices
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* Copyright (c) 2009 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* Supports:
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* Xilinx SPI devices as platform devices
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*
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* Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/spi_bitbang.h>
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#include <linux/spi/xilinx_spi.h>
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#include "xilinx_spi.h"
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static int __devinit xilinx_spi_probe(struct platform_device *dev)
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{
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struct xspi_platform_data *pdata;
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struct resource *r;
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int irq;
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struct spi_master *master;
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u8 i;
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pdata = dev->dev.platform_data;
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if (!pdata)
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return -ENODEV;
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r = platform_get_resource(dev, IORESOURCE_MEM, 0);
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if (!r)
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return -ENODEV;
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irq = platform_get_irq(dev, 0);
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if (irq < 0)
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return -ENXIO;
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master = xilinx_spi_init(&dev->dev, r, irq, dev->id);
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if (!master)
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return -ENODEV;
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for (i = 0; i < pdata->num_devices; i++)
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spi_new_device(master, pdata->devices + i);
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platform_set_drvdata(dev, master);
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return 0;
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}
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static int __devexit xilinx_spi_remove(struct platform_device *dev)
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{
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xilinx_spi_deinit(platform_get_drvdata(dev));
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platform_set_drvdata(dev, 0);
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return 0;
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}
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/* work with hotplug and coldplug */
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MODULE_ALIAS("platform:" XILINX_SPI_NAME);
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static struct platform_driver xilinx_spi_driver = {
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.probe = xilinx_spi_probe,
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.remove = __devexit_p(xilinx_spi_remove),
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.driver = {
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.name = XILINX_SPI_NAME,
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.owner = THIS_MODULE,
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},
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};
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static int __init xilinx_spi_pltfm_init(void)
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{
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return platform_driver_register(&xilinx_spi_driver);
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}
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module_init(xilinx_spi_pltfm_init);
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static void __exit xilinx_spi_pltfm_exit(void)
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{
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platform_driver_unregister(&xilinx_spi_driver);
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}
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module_exit(xilinx_spi_pltfm_exit);
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MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
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MODULE_DESCRIPTION("Xilinx SPI platform driver");
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MODULE_LICENSE("GPL v2");
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