The patch titled
x86: rtc: don't register a platform RTC device for Intel MID platforms
has been added to the -mm tree. Its filename is
x86-rtc-dont-register-a-platform-rtc-device-for-intel-mid-platforms.patch
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------------------------------------------------------
Subject: x86: rtc: don't register a platform RTC device for Intel MID platforms
From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Intel MID x86 platforms have a memory mapped virtual RTC instead. No MID
platform have the default ports (and accessing them may do weird stuff)
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
Cc: Feng Tang <feng.tang@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/mrst.h | 9 +++++++++
arch/x86/kernel/rtc.c | 5 +++++
2 files changed, 14 insertions(+)
diff -puN arch/x86/include/asm/mrst.h~x86-rtc-dont-register-a-platform-rtc-device-for-intel-mid-platforms arch/x86/include/asm/mrst.h
--- a/arch/x86/include/asm/mrst.h~x86-rtc-dont-register-a-platform-rtc-device-for-intel-mid-platforms
+++ a/arch/x86/include/asm/mrst.h
@@ -31,11 +31,20 @@ enum mrst_cpu_type {
};
extern enum mrst_cpu_type __mrst_cpu_chip;
+
+#ifdef CONFIG_X86_INTEL_MID
+
static inline enum mrst_cpu_type mrst_identify_cpu(void)
{
return __mrst_cpu_chip;
}
+#else /* !CONFIG_X86_INTEL_MID */
+
+#define mrst_identify_cpu() (0)
+
+#endif /* !CONFIG_X86_INTEL_MID */
+
enum mrst_timer_options {
MRST_TIMER_DEFAULT,
MRST_TIMER_APBT_ONLY,
diff -puN arch/x86/kernel/rtc.c~x86-rtc-dont-register-a-platform-rtc-device-for-intel-mid-platforms arch/x86/kernel/rtc.c
--- a/arch/x86/kernel/rtc.c~x86-rtc-dont-register-a-platform-rtc-device-for-intel-mid-platforms
+++ a/arch/x86/kernel/rtc.c
@@ -12,6 +12,7 @@
#include <asm/vsyscall.h>
#include <asm/x86_init.h>
#include <asm/time.h>
+#include <asm/mrst.h>
#ifdef CONFIG_X86_32
/*
@@ -241,6 +242,10 @@ static __init int add_rtc_cmos(void)
if (of_have_populated_dt())
return 0;
+ /* Intel MID platforms don't have ioport rtc */
+ if (mrst_identify_cpu())
+ return -ENODEV;
+
platform_device_register(&rtc_device);
dev_info(&rtc_device.dev,
"registered platform RTC device (no PNP device found)\n");
_
Patches currently in -mm which might be from mathias.nyman@xxxxxxxxxxxxxxx are
vrtc-change-its-year-offset-from-1960-to-1972.patch
x86-rtc-dont-register-a-platform-rtc-device-for-intel-mid-platforms.patch
x86-mrst-some-drivers-need-to-known-when-an-scu-is-available.patch
mrst-battery-fixes.patch
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