arch/x86/platform/intel-mid/device_libs/platform_ipc.c

   1 /*
   2  * platform_ipc.c: IPC platform library file
   3  *
   4  * (C) Copyright 2013 Intel Corporation
   5  * Author: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; version 2
  10  * of the License.
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/sfi.h>
  17 #include <linux/gpio.h>
  18 #include <asm/intel-mid.h>
  19 #include "platform_ipc.h"
  20
  21 void __init ipc_device_handler(struct sfi_device_table_entry *pentry,
  22                                 struct devs_id *dev)
  23 {
  24         struct platform_device *pdev;
  25         void *pdata = NULL;
  26         static struct resource res __initdata = {
  27                 .name = "IRQ",
  28                 .flags = IORESOURCE_IRQ,
  29         };
  30
  31         pr_debug("IPC bus, name = %16.16s, irq = 0x%2x\n",
  32                 pentry->name, pentry->irq);
  33
  34         /*
  35          * We need to call platform init of IPC devices to fill misc_pdata
  36          * structure. It will be used in msic_init for initialization.
  37          */
  38         if (dev != NULL)
  39                 pdata = dev->get_platform_data(pentry);
  40
  41         /*
  42          * On Medfield the platform device creation is handled by the MSIC
  43          * MFD driver so we don't need to do it here.
  44          */
  45         if (intel_mid_has_msic())
  46                 return;
  47
  48         pdev = platform_device_alloc(pentry->name, 0);
  49         if (pdev == NULL) {
  50                 pr_err("out of memory for SFI platform device '%s'.\n",
  51                         pentry->name);
  52                 return;
  53         }
  54         res.start = pentry->irq;
  55         platform_device_add_resources(pdev, &res, 1);
  56
  57         pdev->dev.platform_data = pdata;
  58         intel_scu_device_register(pdev);
  59 }
  60
  61 static const struct devs_id pmic_audio_dev_id __initconst = {
  62         .name = "pmic_audio",
  63         .type = SFI_DEV_TYPE_IPC,
  64         .delay = 1,
  65         .device_handler = &ipc_device_handler,
  66 };
  67
  68 sfi_device(pmic_audio_dev_id);