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>

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 4dda097c239e9666253895eb581638fcc2296933..c00f9e5b9df8a6df873e5cc0582be1cba21c4fce 100644 (file)
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -261,6 +261,13 @@ config SPI_XILINX_OF
        help
          This is the OF driver for the SPI controller IP from the Xilinx EDK.
 
+config SPI_XILINX_PLTFM
+       tristate "Xilinx SPI controller platform device"
+       depends on SPI_XILINX
+       help
+         This is the platform driver for the SPI controller IP
+         from the Xilinx EDK.
+
 #
 # Add new SPI master controllers in alphabetical order above this line
 #

diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 01c4095480449eb98d0a38f837d9c9750ea5767a..2f2bebc63b64220d4882dc3bdc320f24399ea77f 100644 (file)
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_SPI_S3C24XX)             += spi_s3c24xx.o
 obj-$(CONFIG_SPI_TXX9)                 += spi_txx9.o
 obj-$(CONFIG_SPI_XILINX)               += xilinx_spi.o
 obj-$(CONFIG_SPI_XILINX_OF)            += xilinx_spi_of.o
+obj-$(CONFIG_SPI_XILINX_PLTFM)         += xilinx_spi_pltfm.o
 obj-$(CONFIG_SPI_SH_SCI)               += spi_sh_sci.o
 obj-$(CONFIG_SPI_STMP3XXX)             += spi_stmp.o
 #      ... add above this line ...

diff --git a/drivers/spi/xilinx_spi_pltfm.c b/drivers/spi/xilinx_spi_pltfm.c
new file mode 100644 (file)
index 0000000..24debac
--- /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");