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