drivers/char/xillybus/xillybus_of.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/drivers/misc/xillybus_of.c
   4  *
   5  * Copyright 2011 Xillybus Ltd, http://xillybus.com
   6  *
   7  * Driver for the Xillybus FPGA/host framework using Open Firmware.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/device.h>
  12 #include <linux/slab.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/of.h>
  15 #include <linux/err.h>
  16 #include "xillybus.h"
  17
  18 MODULE_DESCRIPTION("Xillybus driver for Open Firmware");
  19 MODULE_AUTHOR("Eli Billauer, Xillybus Ltd.");
  20 MODULE_ALIAS("xillybus_of");
  21 MODULE_LICENSE("GPL v2");
  22
  23 static const char xillyname[] = "xillybus_of";
  24
  25 /* Match table for of_platform binding */
  26 static const struct of_device_id xillybus_of_match[] = {
  27         { .compatible = "xillybus,xillybus-1.00.a", },
  28         { .compatible = "xlnx,xillybus-1.00.a", }, /* Deprecated */
  29         {}
  30 };
  31
  32 MODULE_DEVICE_TABLE(of, xillybus_of_match);
  33
  34 static int xilly_drv_probe(struct platform_device *op)
  35 {
  36         struct device *dev = &op->dev;
  37         struct xilly_endpoint *endpoint;
  38         int rc;
  39         int irq;
  40
  41         endpoint = xillybus_init_endpoint(dev);
  42
  43         if (!endpoint)
  44                 return -ENOMEM;
  45
  46         dev_set_drvdata(dev, endpoint);
  47
  48         endpoint->owner = THIS_MODULE;
  49
  50         endpoint->registers = devm_platform_ioremap_resource(op, 0);
  51         if (IS_ERR(endpoint->registers))
  52                 return PTR_ERR(endpoint->registers);
  53
  54         irq = platform_get_irq(op, 0);
  55
  56         rc = devm_request_irq(dev, irq, xillybus_isr, 0, xillyname, endpoint);
  57
  58         if (rc) {
  59                 dev_err(endpoint->dev,
  60                         "Failed to register IRQ handler. Aborting.\n");
  61                 return -ENODEV;
  62         }
  63
  64         return xillybus_endpoint_discovery(endpoint);
  65 }
  66
  67 static int xilly_drv_remove(struct platform_device *op)
  68 {
  69         struct device *dev = &op->dev;
  70         struct xilly_endpoint *endpoint = dev_get_drvdata(dev);
  71
  72         xillybus_endpoint_remove(endpoint);
  73
  74         return 0;
  75 }
  76
  77 static struct platform_driver xillybus_platform_driver = {
  78         .probe = xilly_drv_probe,
  79         .remove = xilly_drv_remove,
  80         .driver = {
  81                 .name = xillyname,
  82                 .of_match_table = xillybus_of_match,
  83         },
  84 };
  85
  86 module_platform_driver(xillybus_platform_driver);