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x86, intel-mid: Move Medfield code out of intel-mid.c core file 

In order make the driver more portable and support other Intel MID
(Mobile Internet Device) platforms we need to move Medfield code from
intel-mid.c core to its own mfld.c file.

This patch contains no functional changes.

Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Link: http://lkml.kernel.org/r/1387224459-25746-2-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
David Cohen 2013-12-16 12:07:36 -08:00 committed by H. Peter Anvin
parent 7e22e91102
commit ecd6910db9
4 changed files with 70 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/platform/intel-mid/Makefile
View File

@ -1,6 +1,6 @@
obj-$(CONFIG_X86_INTEL_MID) += intel-mid.o
obj-$(CONFIG_X86_INTEL_MID) += intel_mid_vrtc.o
obj-$(CONFIG_X86_INTEL_MID) += intel-mid.o intel_mid_vrtc.o mfld.o
obj-$(CONFIG_EARLY_PRINTK_INTEL_MID) += early_printk_intel_mid.o
# SFI specific code
ifdef CONFIG_X86_INTEL_MID
obj-$(CONFIG_SFI) += sfi.o device_libs/

37
arch/x86/platform/intel-mid/intel-mid.c
View File

@ -35,6 +35,8 @@
#include <asm/apb_timer.h>
#include <asm/reboot.h>
#include "intel_mid_weak_decls.h"
/*
* the clockevent devices on Moorestown/Medfield can be APBT or LAPIC clock,
* cmdline option x86_intel_mid_timer can be used to override the configuration
@ -61,46 +63,11 @@ enum intel_mid_timer_options intel_mid_timer_options;
enum intel_mid_cpu_type __intel_mid_cpu_chip;
EXPORT_SYMBOL_GPL(__intel_mid_cpu_chip);
static void intel_mid_power_off(void)
{
}
static void intel_mid_reboot(void)
{
intel_scu_ipc_simple_command(IPCMSG_COLD_BOOT, 0);
}
static unsigned long __init intel_mid_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 = PENWELL_FSB_FREQ_83SKU;
else
fsb = PENWELL_FSB_FREQ_100SKU;
fast_calibrate = ratio * fsb;
pr_debug("read penwell tsc %lu khz\n", fast_calibrate);
lapic_timer_frequency = fsb * 1000 / HZ;
/* mark tsc clocksource as reliable */
set_cpu_cap(&boot_cpu_data, X86_FEATURE_TSC_RELIABLE);
if (fast_calibrate)
return fast_calibrate;
return 0;
}
static void __init intel_mid_time_init(void)
{
sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr);

15
arch/x86/platform/intel-mid/intel_mid_weak_decls.h Normal file
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@ -0,0 +1,15 @@
/*
* intel_mid_weak_decls.h: Weak declarations of intel-mid.c
*
* (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.
*/
/* __attribute__((weak)) makes these declarations overridable */
extern void intel_mid_power_off(void) __attribute__((weak));
extern unsigned long __init intel_mid_calibrate_tsc(void) __attribute__((weak));

51
arch/x86/platform/intel-mid/mfld.c Normal file
View File

@ -0,0 +1,51 @@
/*
* 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>
void intel_mid_power_off(void)
{
}
unsigned long __init intel_mid_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 = PENWELL_FSB_FREQ_83SKU;
else
fsb = PENWELL_FSB_FREQ_100SKU;
fast_calibrate = ratio * fsb;
pr_debug("read penwell tsc %lu khz\n", fast_calibrate);
lapic_timer_frequency = fsb * 1000 / HZ;
/* mark tsc clocksource as reliable */
set_cpu_cap(&boot_cpu_data, X86_FEATURE_TSC_RELIABLE);
if (fast_calibrate)
return fast_calibrate;
return 0;
}