rtc: cmos: Revert "rtc: Fix the AltCentury value on AMD/Hygon platform"

There are multiple reports of this patch breaking RTC time setting for AMD
platforms.

This reverts commit 7ad295d5196a58c22abecef62dd4f99e2f86e831.

Cc: Jinke Fan <fanjinke@hygon.cn>
Link: https://lore.kernel.org/r/CABXGCsMLob0DC25JS8wwAYydnDoHBSoMh2_YLPfqm3TTvDE-Zw@mail.gmail.com
Fixes: 7ad295d5196a ("rtc: Fix the AltCentury value on AMD/Hygon platform")
Link: https://lore.kernel.org/r/20200104043110.707810-1-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-mc146818-lib.c b/drivers/rtc/rtc-mc146818-lib.c
index df2829d..2ecd875 100644 (file)
--- a/drivers/rtc/rtc-mc146818-lib.c
+++ b/drivers/rtc/rtc-mc146818-lib.c
@@ -172,20 +172,7 @@ int mc146818_set_time(struct rtc_time *time)
        save_control = CMOS_READ(RTC_CONTROL);
        CMOS_WRITE((save_control|RTC_SET), RTC_CONTROL);
        save_freq_select = CMOS_READ(RTC_FREQ_SELECT);
-
-#ifdef CONFIG_X86
-       if ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
-            boot_cpu_data.x86 == 0x17) ||
-            boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) {
-               CMOS_WRITE((save_freq_select & (~RTC_DIV_RESET2)),
-                       RTC_FREQ_SELECT);
-               save_freq_select &= ~RTC_DIV_RESET2;
-       } else
-               CMOS_WRITE((save_freq_select | RTC_DIV_RESET2),
-                       RTC_FREQ_SELECT);
-#else
-       CMOS_WRITE((save_freq_select | RTC_DIV_RESET2), RTC_FREQ_SELECT);
-#endif
+       CMOS_WRITE((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
 
 #ifdef CONFIG_MACH_DECSTATION
        CMOS_WRITE(real_yrs, RTC_DEC_YEAR);