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-rw-r--r--arch/arm/mach-omap2/pm.c167
1 files changed, 167 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
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index 000000000..da829a90f
--- /dev/null
+++ b/arch/arm/mach-omap2/pm.c
@@ -0,0 +1,167 @@
+// 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);