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>

diff --git a/arch/x86/platform/intel-mid/Makefile b/arch/x86/platform/intel-mid/Makefile
index 01cc29e..78a14ba 100644 (file)
--- a/arch/x86/platform/intel-mid/Makefile
+++ b/arch/x86/platform/intel-mid/Makefile
@@ -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/

diff --git a/arch/x86/platform/intel-mid/intel-mid.c b/arch/x86/platform/intel-mid/intel-mid.c
index f90e290..527d6d5 100644 (file)
--- a/arch/x86/platform/intel-mid/intel-mid.c
+++ b/arch/x86/platform/intel-mid/intel-mid.c
@@ -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);

diff --git a/arch/x86/platform/intel-mid/intel_mid_weak_decls.h b/arch/x86/platform/intel-mid/intel_mid_weak_decls.h
new file mode 100644 (file)
index 0000000..519beb7
--- /dev/null
+++ b/arch/x86/platform/intel-mid/intel_mid_weak_decls.h
@@ -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));

diff --git a/arch/x86/platform/intel-mid/mfld.c b/arch/x86/platform/intel-mid/mfld.c
new file mode 100644 (file)
index 0000000..c7ff83c
--- /dev/null
+++ b/arch/x86/platform/intel-mid/mfld.c
@@ -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;
+}