drivers/mfd/rdc321x-southbridge.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * RDC321x MFD southbridge driver
   4  *
   5  * Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>
   6  * Copyright (C) 2010 Bernhard Loos <bernhardloos@googlemail.com>
   7  */
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/pci.h>
  12 #include <linux/mfd/core.h>
  13 #include <linux/mfd/rdc321x.h>
  14
  15 static struct rdc321x_wdt_pdata rdc321x_wdt_pdata;
  16
  17 static const struct resource rdc321x_wdt_resource[] = {
  18         {
  19                 .name   = "wdt-reg",
  20                 .start  = RDC321X_WDT_CTRL,
  21                 .end    = RDC321X_WDT_CTRL + 0x3,
  22                 .flags  = IORESOURCE_IO,
  23         }
  24 };
  25
  26 static struct rdc321x_gpio_pdata rdc321x_gpio_pdata = {
  27         .max_gpios      = RDC321X_NUM_GPIO,
  28 };
  29
  30 static const struct resource rdc321x_gpio_resources[] = {
  31         {
  32                 .name   = "gpio-reg1",
  33                 .start  = RDC321X_GPIO_CTRL_REG1,
  34                 .end    = RDC321X_GPIO_CTRL_REG1 + 0x7,
  35                 .flags  = IORESOURCE_IO,
  36         }, {
  37                 .name   = "gpio-reg2",
  38                 .start  = RDC321X_GPIO_CTRL_REG2,
  39                 .end    = RDC321X_GPIO_CTRL_REG2 + 0x7,
  40                 .flags  = IORESOURCE_IO,
  41         }
  42 };
  43
  44 static const struct mfd_cell rdc321x_sb_cells[] = {
  45         {
  46                 .name           = "rdc321x-wdt",
  47                 .resources      = rdc321x_wdt_resource,
  48                 .num_resources  = ARRAY_SIZE(rdc321x_wdt_resource),
  49                 .platform_data  = &rdc321x_wdt_pdata,
  50                 .pdata_size     = sizeof(rdc321x_wdt_pdata),
  51         }, {
  52                 .name           = "rdc321x-gpio",
  53                 .resources      = rdc321x_gpio_resources,
  54                 .num_resources  = ARRAY_SIZE(rdc321x_gpio_resources),
  55                 .platform_data  = &rdc321x_gpio_pdata,
  56                 .pdata_size     = sizeof(rdc321x_gpio_pdata),
  57         },
  58 };
  59
  60 static int rdc321x_sb_probe(struct pci_dev *pdev,
  61                                         const struct pci_device_id *ent)
  62 {
  63         int err;
  64
  65         err = pci_enable_device(pdev);
  66         if (err) {
  67                 dev_err(&pdev->dev, "failed to enable device\n");
  68                 return err;
  69         }
  70
  71         rdc321x_gpio_pdata.sb_pdev = pdev;
  72         rdc321x_wdt_pdata.sb_pdev = pdev;
  73
  74         return devm_mfd_add_devices(&pdev->dev, -1,
  75                                     rdc321x_sb_cells,
  76                                     ARRAY_SIZE(rdc321x_sb_cells),
  77                                     NULL, 0, NULL);
  78 }
  79
  80 static const struct pci_device_id rdc321x_sb_table[] = {
  81         { PCI_DEVICE(PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030) },
  82         {}
  83 };
  84 MODULE_DEVICE_TABLE(pci, rdc321x_sb_table);
  85
  86 static struct pci_driver rdc321x_sb_driver = {
  87         .name           = "RDC321x Southbridge",
  88         .id_table       = rdc321x_sb_table,
  89         .probe          = rdc321x_sb_probe,
  90 };
  91
  92 module_pci_driver(rdc321x_sb_driver);
  93
  94 MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
  95 MODULE_LICENSE("GPL");
  96 MODULE_DESCRIPTION("RDC R-321x MFD southbridge driver");