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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/mach-omap2/pm.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-omap2/pm.c')
-rw-r--r-- | arch/arm/mach-omap2/pm.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c new file mode 100644 index 0000000000..700869c9ea --- /dev/null +++ b/arch/arm/mach-omap2/pm.c @@ -0,0 +1,161 @@ +// 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_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); + +static 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); |