Release 4.14 arch/x86/platform/intel-mid/mfld.c
/*
* mfld.c: Intel Medfield platform setup code
*
* (C) Copyright 2013 Intel Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; version 2
* of the License.
*/
#include <linux/init.h>
#include <asm/apic.h>
#include <asm/intel-mid.h>
#include <asm/intel_mid_vrtc.h>
#include "intel_mid_weak_decls.h"
static unsigned long __init mfld_calibrate_tsc(void)
{
unsigned long fast_calibrate;
u32 lo, hi, ratio, fsb;
rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
pr_debug("IA32 perf status is 0x%x, 0x%0x\n", lo, hi);
ratio = (hi >> 8) & 0x1f;
pr_debug("ratio is %d\n", ratio);
if (!ratio) {
pr_err("read a zero ratio, should be incorrect!\n");
pr_err("force tsc ratio to 16 ...\n");
ratio = 16;
}
rdmsr(MSR_FSB_FREQ, lo, hi);
if ((lo & 0x7) == 0x7)
fsb = FSB_FREQ_83SKU;
else
fsb = FSB_FREQ_100SKU;
fast_calibrate = ratio * fsb;
pr_debug("read penwell tsc %lu khz\n", fast_calibrate);
lapic_timer_frequency = fsb * 1000 / HZ;
/*
* TSC on Intel Atom SoCs is reliable and of known frequency.
* See tsc_msr.c for details.
*/
setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ);
setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE);
return fast_calibrate;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Cohen | 131 | 92.25% | 1 | 33.33% |
| Bin Gao | 7 | 4.93% | 1 | 33.33% |
| Kuppuswamy Sathyanarayanan | 4 | 2.82% | 1 | 33.33% |
| Total | 142 | 100.00% | 3 | 100.00% |
static void __init penwell_arch_setup(void)
{
x86_platform.calibrate_tsc = mfld_calibrate_tsc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Kuppuswamy Sathyanarayanan | 12 | 80.00% | 1 | 50.00% |
| David Cohen | 3 | 20.00% | 1 | 50.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
static struct intel_mid_ops penwell_ops = {
.arch_setup = penwell_arch_setup,
};
void *get_penwell_ops(void)
{
return &penwell_ops;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Kuppuswamy Sathyanarayanan | 9 | 75.00% | 1 | 50.00% |
| David Cohen | 3 | 25.00% | 1 | 50.00% |
| Total | 12 | 100.00% | 2 | 100.00% |
void *get_cloverview_ops(void)
{
return &penwell_ops;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Kuppuswamy Sathyanarayanan | 9 | 75.00% | 1 | 50.00% |
| David Cohen | 3 | 25.00% | 1 | 50.00% |
| Total | 12 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Cohen | 153 | 73.21% | 2 | 40.00% |
| Kuppuswamy Sathyanarayanan | 37 | 17.70% | 1 | 20.00% |
| Andy Shevchenko | 12 | 5.74% | 1 | 20.00% |
| Bin Gao | 7 | 3.35% | 1 | 20.00% |
| Total | 209 | 100.00% | 5 | 100.00% |
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