efDataDiscreteRateMining averageVoltageCalculation.c 张婷 commit at 2020-11-19

efDataDiscreteRateMining/averageCalculation/averageVoltageCalculation.c

@@ -0,0 +1,111 @@
+/*
+ * linux/arch/arm/mach-sa1100/generic.c
+ *
+ * Author: Nicolas Pitre
+ *
+ * Code common to all SA11x0 machines.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/pm.h>
+#include <linux/cpufreq.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+
+#include <video/sa1100fb.h>
+
+#include <asm/div64.h>
+#include <asm/mach/map.h>
+#include <asm/mach/flash.h>
+#include <asm/irq.h>
+#include <asm/system_misc.h>
+
+#include <mach/hardware.h>
+#include <mach/irqs.h>
+
+#include "generic.h"
+
+unsigned int reset_status;
+EXPORT_SYMBOL(reset_status);
+
+#define NR_FREQS	16
+
+/*
+ * This table is setup for a 3.6864MHz Crystal.
+ */
+static const unsigned short cclk_frequency_100khz[NR_FREQS] = {
+	 590,	/*  59.0 MHz */
+	 737,	/*  73.7 MHz */
+	 885,	/*  88.5 MHz */
+	1032,	/* 103.2 MHz */
+	1180,	/* 118.0 MHz */
+	1327,	/* 132.7 MHz */
+	1475,	/* 147.5 MHz */
+	1622,	/* 162.2 MHz */
+	1769,	/* 176.9 MHz */
+	1917,	/* 191.7 MHz */
+	2064,	/* 206.4 MHz */
+	2212,	/* 221.2 MHz */
+	2359,	/* 235.9 MHz */
+	2507,	/* 250.7 MHz */
+	2654,	/* 265.4 MHz */
+	2802	/* 280.2 MHz */
+};
+
+/* rounds up(!)  */
+unsigned int sa11x0_freq_to_ppcr(unsigned int khz)
+{
+	int i;
+
+	khz /= 100;
+
+	for (i = 0; i < NR_FREQS; i++)
+		if (cclk_frequency_100khz[i] >= khz)
+			break;
+
+	return i;
+}
+
+unsigned int sa11x0_ppcr_to_freq(unsigned int idx)
+{
+	unsigned int freq = 0;
+	if (idx < NR_FREQS)
+		freq = cclk_frequency_100khz[idx] * 100;
+	return freq;
+}
+
+
+/* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
+ * this platform, anyway.
+ */
+int sa11x0_verify_speed(struct cpufreq_policy *policy)
+{
+	unsigned int tmp;
+	if (policy->cpu)
+		return -EINVAL;
+
+	cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
+
+	/* make sure that at least one frequency is within the policy */
+	tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100;
+	if (tmp > policy->max)
+		policy->max = tmp;
+
+	cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
+
+	return 0;
+}
+
+unsigned int sa11x0_getspeed(unsigned int cpu)
+{
+	if (cpu)
+		return 0;
+	return cclk_frequency_100khz[PPCR & 0xf] * 100;