xilinx_spi: add a platform driver using the xilinx_spi common module.

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>

1 files changed, 102 insertions, 0 deletions

diff --git a/drivers/spi/xilinx_spi_pltfm.c b/drivers/spi/xilinx_spi_pltfm.c
new file mode 100644
index 00000000000..24debac646a
--- /dev/null
+++ b/drivers/spi/xilinx_spi_pltfm.c
@@ -0,0 +1,102 @@
+/*
+ * Support for Xilinx SPI platform devices
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Supports:
+ * Xilinx SPI devices as platform devices
+ *
+ * Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_bitbang.h>
+#include <linux/spi/xilinx_spi.h>
+
+#include "xilinx_spi.h"
+
+static int __devinit xilinx_spi_probe(struct platform_device *dev)
+{
+	struct xspi_platform_data *pdata;
+	struct resource *r;
+	int irq;
+	struct spi_master *master;
+	u8 i;
+
+	pdata = dev->dev.platform_data;
+	if (!pdata)
+		return -ENODEV;
+
+	r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	if (!r)
+		return -ENODEV;
+
+	irq = platform_get_irq(dev, 0);
+	if (irq < 0)
+		return -ENXIO;
+
+	master = xilinx_spi_init(&dev->dev, r, irq, dev->id);
+	if (!master)
+		return -ENODEV;
+
+	for (i = 0; i < pdata->num_devices; i++)
+		spi_new_device(master, pdata->devices + i);
+
+	platform_set_drvdata(dev, master);
+	return 0;
+}
+
+static int __devexit xilinx_spi_remove(struct platform_device *dev)
+{
+	xilinx_spi_deinit(platform_get_drvdata(dev));
+	platform_set_drvdata(dev, 0);
+
+	return 0;
+}
+
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:" XILINX_SPI_NAME);
+
+static struct platform_driver xilinx_spi_driver = {
+	.probe	= xilinx_spi_probe,
+	.remove	= __devexit_p(xilinx_spi_remove),
+	.driver = {
+		.name = XILINX_SPI_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init xilinx_spi_pltfm_init(void)
+{
+	return platform_driver_register(&xilinx_spi_driver);
+}
+module_init(xilinx_spi_pltfm_init);
+
+static void __exit xilinx_spi_pltfm_exit(void)
+{
+	platform_driver_unregister(&xilinx_spi_driver);
+}
+module_exit(xilinx_spi_pltfm_exit);
+
+MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
+MODULE_DESCRIPTION("Xilinx SPI platform driver");
+MODULE_LICENSE("GPL v2");