waterDataStatisticsCrossAssociation rtuDataOperation.c 李欣儒 commit at 2020-09-02

waterDataStatisticsCrossAssociation/databaseOperation/rtuDataOperation.c

@@ -0,0 +1,162 @@
+/*
+ * linux/arch/arm/mach-omap2/timer.c
+ *
+ * OMAP2 GP timer support.
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ *
+ * Update to use new clocksource/clockevent layers
+ * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
+ * Copyright (C) 2007 MontaVista Software, Inc.
+ *
+ * Original driver:
+ * Copyright (C) 2005 Nokia Corporation
+ * Author: Paul Mundt <paul.mundt@nokia.com>
+ *         Juha Yrjölä <juha.yrjola@nokia.com>
+ * OMAP Dual-mode timer framework support by Timo Teras
+ *
+ * Some parts based off of TI's 24xx code:
+ *
+ * Copyright (C) 2004-2009 Texas Instruments, Inc.
+ *
+ * Roughly modelled after the OMAP1 MPU timer code.
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/time.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/dmtimer-omap.h>
+
+#include <asm/mach/time.h>
+#include <asm/smp_twd.h>
+#include <asm/sched_clock.h>
+
+#include <asm/arch_timer.h>
+#include "omap_hwmod.h"
+#include "omap_device.h"
+#include <plat/counter-32k.h>
+#include <plat/dmtimer.h>
+#include "omap-pm.h"
+
+#include "soc.h"
+#include "common.h"
+#include "powerdomain.h"
+
+/* Parent clocks, eventually these will come from the clock framework */
+
+#define OMAP2_MPU_SOURCE	"sys_ck"
+#define OMAP3_MPU_SOURCE	OMAP2_MPU_SOURCE
+#define OMAP4_MPU_SOURCE	"sys_clkin_ck"
+#define OMAP2_32K_SOURCE	"func_32k_ck"
+#define OMAP3_32K_SOURCE	"omap_32k_fck"
+#define OMAP4_32K_SOURCE	"sys_32k_ck"
+
+#define REALTIME_COUNTER_BASE				0x48243200
+#define INCREMENTER_NUMERATOR_OFFSET			0x10
+#define INCREMENTER_DENUMERATOR_RELOAD_OFFSET		0x14
+#define NUMERATOR_DENUMERATOR_MASK			0xfffff000
+
+/* Clockevent code */
+
+static struct omap_dm_timer clkev;
+static struct clock_event_device clockevent_gpt;
+
+static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *evt = &clockevent_gpt;
+
+	__omap_dm_timer_write_status(&clkev, OMAP_TIMER_INT_OVERFLOW);
+
+	evt->event_handler(evt);
+	return IRQ_HANDLED;
+}
+
+static struct irqaction omap2_gp_timer_irq = {
+	.name		= "gp_timer",
+	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+	.handler	= omap2_gp_timer_interrupt,
+};
+
+static int omap2_gp_timer_set_next_event(unsigned long cycles,
+					 struct clock_event_device *evt)
+{
+	__omap_dm_timer_load_start(&clkev, OMAP_TIMER_CTRL_ST,
+				   0xffffffff - cycles, OMAP_TIMER_POSTED);
+
+	return 0;
+}
+
+static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
+				    struct clock_event_device *evt)
+{
+	u32 period;
+
+	__omap_dm_timer_stop(&clkev, OMAP_TIMER_POSTED, clkev.rate);
+
+	switch (mode) {
+	case CLOCK_EVT_MODE_PERIODIC:
+		period = clkev.rate / HZ;
+		period -= 1;
+		/* Looks like we need to first set the load value separately */
+		__omap_dm_timer_write(&clkev, OMAP_TIMER_LOAD_REG,
+				      0xffffffff - period, OMAP_TIMER_POSTED);
+		__omap_dm_timer_load_start(&clkev,
+					OMAP_TIMER_CTRL_AR | OMAP_TIMER_CTRL_ST,
+					0xffffffff - period, OMAP_TIMER_POSTED);
+		break;
+	case CLOCK_EVT_MODE_ONESHOT:
+		break;
+	case CLOCK_EVT_MODE_UNUSED:
+	case CLOCK_EVT_MODE_SHUTDOWN:
+	case CLOCK_EVT_MODE_RESUME:
+		break;
+	}
+}
+
+static struct clock_event_device clockevent_gpt = {
+	.name		= "gp_timer",
+	.features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+	.shift		= 32,
+	.rating		= 300,
+	.set_next_event	= omap2_gp_timer_set_next_event,
+	.set_mode	= omap2_gp_timer_set_mode,
+};
+
+static struct property device_disabled = {
+	.name = "status",
+	.length = sizeof("disabled"),
+	.value = "disabled",
+};
+
+static struct of_device_id omap_timer_match[] __initdata = {
+	{ .compatible = "ti,omap2-timer", },
+	{ }
+};
+
+/**
+ * omap_get_timer_dt - get a timer using device-tree
+ * @match	- device-tree match structure for matching a device type
+ * @property	- optional timer property to match
+ *
+ * Helper function to get a timer during early boot using device-tree for use
+ * as kernel system timer. Optionally, the property argument can be used to
+ * select a timer with a specific property. Once a timer is found then mark
+ * the timer node in device-tree as disabled, to prevent the kernel from
+ * registering this timer as a platform device and so no one else can use it.
+ */
+static struct device_node * __init omap_get_timer_dt(struct of_device_id *match,