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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * pm.c - Common OMAP2+ power management-related code
- *
- * Copyright (C) 2010 Texas Instruments, Inc.
- * Copyright (C) 2010 Nokia Corporation
- */
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/io.h>
- #include <linux/err.h>
- #include <linux/pm_opp.h>
- #include <linux/export.h>
- #include <linux/suspend.h>
- #include <linux/clk.h>
- #include <linux/cpu.h>
- #include <asm/system_misc.h>
- #include "omap_device.h"
- #include "common.h"
- #include "soc.h"
- #include "prcm-common.h"
- #include "voltage.h"
- #include "powerdomain.h"
- #include "clockdomain.h"
- #include "pm.h"
- u32 enable_off_mode;
- #ifdef CONFIG_SUSPEND
- /*
- * omap_pm_suspend: points to a function that does the SoC-specific
- * suspend work
- */
- static int (*omap_pm_suspend)(void);
- #endif
- #ifdef CONFIG_PM
- /**
- * struct omap2_oscillator - Describe the board main oscillator latencies
- * @startup_time: oscillator startup latency
- * @shutdown_time: oscillator shutdown latency
- */
- struct omap2_oscillator {
- u32 startup_time;
- u32 shutdown_time;
- };
- static struct omap2_oscillator oscillator = {
- .startup_time = ULONG_MAX,
- .shutdown_time = ULONG_MAX,
- };
- void omap_pm_setup_oscillator(u32 tstart, u32 tshut)
- {
- oscillator.startup_time = tstart;
- oscillator.shutdown_time = tshut;
- }
- void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
- {
- if (!tstart || !tshut)
- return;
- *tstart = oscillator.startup_time;
- *tshut = oscillator.shutdown_time;
- }
- #endif
- int omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused)
- {
- clkdm_allow_idle(clkdm);
- return 0;
- }
- #ifdef CONFIG_SUSPEND
- static int omap_pm_enter(suspend_state_t suspend_state)
- {
- int ret = 0;
- if (!omap_pm_suspend)
- return -ENOENT; /* XXX doublecheck */
- switch (suspend_state) {
- case PM_SUSPEND_MEM:
- ret = omap_pm_suspend();
- break;
- default:
- ret = -EINVAL;
- }
- return ret;
- }
- static int omap_pm_begin(suspend_state_t state)
- {
- cpu_idle_poll_ctrl(true);
- if (soc_is_omap34xx())
- omap_prcm_irq_prepare();
- return 0;
- }
- static void omap_pm_end(void)
- {
- cpu_idle_poll_ctrl(false);
- }
- static void omap_pm_wake(void)
- {
- if (soc_is_omap34xx())
- omap_prcm_irq_complete();
- }
- static const struct platform_suspend_ops omap_pm_ops = {
- .begin = omap_pm_begin,
- .end = omap_pm_end,
- .enter = omap_pm_enter,
- .wake = omap_pm_wake,
- .valid = suspend_valid_only_mem,
- };
- /**
- * omap_common_suspend_init - Set common suspend routines for OMAP SoCs
- * @pm_suspend: function pointer to SoC specific suspend function
- */
- void omap_common_suspend_init(void *pm_suspend)
- {
- omap_pm_suspend = pm_suspend;
- suspend_set_ops(&omap_pm_ops);
- }
- #endif /* CONFIG_SUSPEND */
- int __maybe_unused omap_pm_nop_init(void)
- {
- return 0;
- }
- int (*omap_pm_soc_init)(void);
- int __init omap2_common_pm_late_init(void)
- {
- int error;
- if (!omap_pm_soc_init)
- return 0;
- /* Init the voltage layer */
- omap3_twl_init();
- omap4_twl_init();
- omap4_cpcap_init();
- omap_voltage_late_init();
- /* Smartreflex device init */
- omap_devinit_smartreflex();
- error = omap_pm_soc_init();
- if (error)
- pr_warn("%s: pm soc init failed: %i\n", __func__, error);
- omap2_clk_enable_autoidle_all();
- return 0;
- }
- omap_late_initcall(omap2_common_pm_late_init);
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