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 */
to_omap_device(struct platform_device * pdev)89 static inline struct omap_device *to_omap_device(struct platform_device *pdev)
90 {
91 	return pdev ? pdev->archdata.od : NULL;
92 }
93 #endif
94