From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:27:49 +0200
Subject: Adding upstream version 6.6.15.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/arm/mach-omap2/pm.c | 161 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 arch/arm/mach-omap2/pm.c

(limited to 'arch/arm/mach-omap2/pm.c')

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);
-- 
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