1 files changed, 114 insertions, 19 deletions

diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index 80f2db5bcfd6..7adaef62a991 100644
--- a/drivers/spi/xilinx_spi.c
+++ b/drivers/spi/xilinx_spi.c
@@ -1,26 +1,27 @@
 /*
- * xilinx_spi.c
- *
  * Xilinx SPI controller driver (master mode only)
  *
  * Author: MontaVista Software, Inc.
  *      source@mvista.com
  *
- * 2002-2007 (c) MontaVista Software, Inc.  This file is licensed under the
- * terms of the GNU General Public License version 2.  This program is licensed
- * "as is" without any warranty of any kind, whether express or implied.
+ * Copyright (c) 2010 Secret Lab Technologies, Ltd.
+ * Copyright (c) 2009 Intel Corporation
+ * 2002-2007 (c) MontaVista Software, Inc.
+
+ * 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.
  */
 
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
-
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_bitbang.h>
-#include <linux/io.h>
-
-#include "xilinx_spi.h"
 #include <linux/spi/xilinx_spi.h>
+#include <linux/io.h>
 
 #define XILINX_SPI_NAME "xilinx_spi"
 
@@ -350,19 +351,22 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
         return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id xilinx_spi_of_match[] = {
+        { .compatible = "xlnx,xps-spi-2.00.a", },
+        { .compatible = "xlnx,xps-spi-2.00.b", },
+        {}
+};
+MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
+#endif
+
 struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
-        u32 irq, s16 bus_num)
+        u32 irq, s16 bus_num, int num_cs, int little_endian, int bits_per_word)
 {
         struct spi_master *master;
         struct xilinx_spi *xspi;
-        struct xspi_platform_data *pdata = dev->platform_data;
         int ret;
 
-        if (!pdata) {
-                dev_err(dev, "No platform data attached\n");
-                return NULL;
-        }
-
         master = spi_alloc_master(dev, sizeof(struct xilinx_spi));
         if (!master)
                 return NULL;
@@ -389,21 +393,21 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
         }
 
         master->bus_num = bus_num;
-        master->num_chipselect = pdata->num_chipselect;
+        master->num_chipselect = num_cs;
 #ifdef CONFIG_OF
         master->dev.of_node = dev->of_node;
 #endif
 
         xspi->mem = *mem;
         xspi->irq = irq;
-        if (pdata->little_endian) {
+        if (little_endian) {
                 xspi->read_fn = xspi_read32;
                 xspi->write_fn = xspi_write32;
         } else {
                 xspi->read_fn = xspi_read32_be;
                 xspi->write_fn = xspi_write32_be;
         }
-        xspi->bits_per_word = pdata->bits_per_word;
+        xspi->bits_per_word = bits_per_word;
         if (xspi->bits_per_word == 8) {
                 xspi->tx_fn = xspi_tx8;
                 xspi->rx_fn = xspi_rx8;
@@ -462,6 +466,97 @@ void xilinx_spi_deinit(struct spi_master *master)
 }
 EXPORT_SYMBOL(xilinx_spi_deinit);
 
+static int __devinit xilinx_spi_probe(struct platform_device *dev)
+{
+        struct xspi_platform_data *pdata;
+        struct resource *r;
+        int irq, num_cs = 0, little_endian = 0, bits_per_word = 8;
+        struct spi_master *master;
+        u8 i;
+
+        pdata = dev->dev.platform_data;
+        if (pdata) {
+                num_cs = pdata->num_chipselect;
+                little_endian = pdata->little_endian;
+                bits_per_word = pdata->bits_per_word;
+        }
+
+#ifdef CONFIG_OF
+        if (dev->dev.of_node) {
+                const __be32 *prop;
+                int len;
+
+                /* number of slave select bits is required */
+                prop = of_get_property(dev->dev.of_node, "xlnx,num-ss-bits",
+                                       &len);
+                if (prop && len >= sizeof(*prop))
+                        num_cs = __be32_to_cpup(prop);
+        }
+#endif
+
+        if (!num_cs) {
+                dev_err(&dev->dev, "Missing slave select configuration data\n");
+                return -EINVAL;
+        }
+
+
+        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, num_cs,
+                                 little_endian, bits_per_word);
+        if (!master)
+                return -ENODEV;
+
+        if (pdata) {
+                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,
+#ifdef CONFIG_OF
+                .of_match_table = xilinx_spi_of_match,
+#endif
+        },
+};
+
+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("MontaVista Software, Inc. <source@mvista.com>");
 MODULE_DESCRIPTION("Xilinx SPI driver");
 MODULE_LICENSE("GPL");