arch/arm/mach-omap2/omap_device.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * omap_device headers
   4  *
   5  * Copyright (C) 2009 Nokia Corporation
   6  * Paul Walmsley
   7  *
   8  * Developed in collaboration with (alphabetical order): Benoit
   9  * Cousson, Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram
  10  * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard
  11  * Woodruff
  12  *
  13  * This type of functionality should be implemented as a proper
  14  * omap_bus/omap_device in Linux.
  15  *
  16  * omap_device differs from omap_hwmod in that it includes external
  17  * (e.g., board- and system-level) integration details.  omap_hwmod
  18  * stores hardware data that is invariant for a given OMAP chip.
  19  */
  20 #ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
  21 #define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
  22
  23 #include <linux/kernel.h>
  24 #include <linux/platform_device.h>
  25
  26 #include "omap_hwmod.h"
  27
  28 extern struct dev_pm_domain omap_device_pm_domain;
  29 extern struct dev_pm_domain omap_device_fail_pm_domain;
  30
  31 /* omap_device._state values */
  32 #define OMAP_DEVICE_STATE_UNKNOWN       0
  33 #define OMAP_DEVICE_STATE_ENABLED       1
  34 #define OMAP_DEVICE_STATE_IDLE          2
  35 #define OMAP_DEVICE_STATE_SHUTDOWN      3
  36
  37 /* omap_device.flags values */
  38 #define OMAP_DEVICE_SUSPENDED           BIT(0)
  39
  40 /**
  41  * struct omap_device - omap_device wrapper for platform_devices
  42  * @pdev: platform_device
  43  * @hwmods: (one .. many per omap_device)
  44  * @hwmods_cnt: ARRAY_SIZE() of @hwmods
  45  * @_state: one of OMAP_DEVICE_STATE_* (see above)
  46  * @flags: device flags
  47  * @_driver_status: one of BUS_NOTIFY_*_DRIVER from <linux/device.h>
  48  *
  49  * Integrates omap_hwmod data into Linux platform_device.
  50  *
  51  * Field names beginning with underscores are for the internal use of
  52  * the omap_device code.
  53  *
  54  */
  55 struct omap_device {
  56         struct platform_device          *pdev;
  57         struct omap_hwmod               **hwmods;
  58         unsigned long                   _driver_status;
  59         u8                              hwmods_cnt;
  60         u8                              _state;
  61         u8                              flags;
  62 };
  63
  64 /* Device driver interface (call via platform_data fn ptrs) */
  65
  66 int omap_device_enable(struct platform_device *pdev);
  67 int omap_device_idle(struct platform_device *pdev);
  68
  69 /* Core code interface */
  70
  71 struct omap_device *omap_device_alloc(struct platform_device *pdev,
  72                                       struct omap_hwmod **ohs, int oh_cnt);
  73 void omap_device_delete(struct omap_device *od);
  74 int omap_device_register(struct platform_device *pdev);
  75
  76 struct device *omap_device_get_by_hwmod_name(const char *oh_name);
  77
  78 /* OMAP PM interface */
  79 int omap_device_get_context_loss_count(struct platform_device *pdev);
  80
  81 /* Other */
  82
  83 int omap_device_assert_hardreset(struct platform_device *pdev,
  84                                  const char *name);
  85 int omap_device_deassert_hardreset(struct platform_device *pdev,
  86                                  const char *name);
  87
  88 /* Get omap_device pointer from platform_device pointer */
  89 static inline struct omap_device *to_omap_device(struct platform_device *pdev)
  90 {
  91         return pdev ? pdev->archdata.od : NULL;
  92 }
  93 #endif