arm/mach-omap2/pm33xx-core.c

1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
11 #include <linux/suspend.h>
14 #include <asm/suspend.h>
18 #include <linux/platform_data/gpio-omap.h>
33 #include "omap-secure.h"
52 		return -ENOMEM;  in am43xx_map_scu()
60 		pr_warn("WARNING: This platform does not support off-mode, entering DeepSleep suspend.\n");  in am33xx_check_off_mode_enable()
69 	 * Check for am437x-gp-evm which has the right Hardware design to  in am43xx_check_off_mode_enable()
72 	if (of_machine_is_compatible("ti,am437x-gp-evm") && enable_off_mode)  in am43xx_check_off_mode_enable()
75 		pr_warn("WARNING: This platform does not support off-mode, entering DeepSleep suspend.\n");  in am43xx_check_off_mode_enable()
80 static int amx3_common_init(int (*idle)(u32 wfi_flags))  in amx3_common_init()
87 		return -ENODEV;  in amx3_common_init()
94 		pr_err("PM: Failed to get cefuse_pwrdm\n");  in amx3_common_init()
100 	idle_fn = idle;  in amx3_common_init()
105 static int am33xx_suspend_init(int (*idle)(u32 wfi_flags))  in am33xx_suspend_init()
111 		return -ENODEV;  in am33xx_suspend_init()
114 	return amx3_common_init(idle);  in am33xx_suspend_init()
117 static int am43xx_suspend_init(int (*idle)(u32 wfi_flags))  in am43xx_suspend_init()
127 	ret = amx3_common_init(idle);  in am43xx_suspend_init()
165 	 * BUG: GFX_L4LS clock domain needs to be woken up to  in am33xx_suspend()
168 	 * disabled, thereby leading to PER power domain  in am33xx_suspend()
183 	/* Suspend secure side on HS devices */  in am43xx_suspend()
204 	 * Note that even on systems with OP-TEE available this resume call is  in am43xx_suspend()
205 	 * issued to the ROM. This is because upon waking from suspend the ROM  in am43xx_suspend()
206 	 * is restored as the secure monitor. On systems with OP-TEE ROM will  in am43xx_suspend()
207 	 * restore OP-TEE during this call.  in am43xx_suspend()
281 	 * HACK: restore dpll_per_clkdcoldo register contents, to avoid  in am43xx_restore_context()
282 	 * breaking suspend-resume  in am43xx_restore_context()
325  * Block system suspend initially. Later on pm33xx sets up it's own
327  * wkup_m3_ipc and booted am335x-pm-firmware.elf.
331 	pr_warn("PM not initialized for pm33xx, wkup_m3_ipc, or am335x-pm-firmware.elf\n");  in amx3_suspend_block()
333 	return -EINVAL;  in amx3_suspend_block()
372 	devinfo.id = -1;  in amx3_common_pm_init()
387 		state_node = of_parse_phandle(cpu_node, "cpu-idle-states", i);  in amx3_idle_init()
402 		if (of_property_read_bool(state_node, "ti,idle-wkup-m3"))  in amx3_idle_init()
411 		return -ENOMEM;  in amx3_idle_init()
424 		return -EINVAL;  in amx3_idle_enter()
427 		idle_fn(idle_state->wfi_flags);  in amx3_idle_enter()
434 	.suspend = amx3_idle_enter,