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 94