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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-09 01:46:31 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-09 01:46:31 +0300 |
commit | c19176154b464c861e49355eff636aa6896735b5 (patch) | |
tree | 5dd931abe6aa3b73d10119a77950f2a0f3323a74 /include | |
parent | 12f03ee606914317e7e6a0815e53a48205c31dae (diff) | |
parent | 5f1b2f77646fc0ef2f36fc554f5722a1381d0892 (diff) | |
download | linux-c19176154b464c861e49355eff636aa6896735b5.tar.xz |
Merge tag 'rtc-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"Core:
- use is_visible() to control sysfs attributes
- switch wakealarm attribute to DEVICE_ATTR_RW
- make rtc_does_wakealarm() return boolean
- properly manage lifetime of dev and cdev in rtc device
- remove unnecessary device_get() in rtc_device_unregister
- fix double free in rtc_register_device() error path
New drivers:
- NXP LPC24xx
- Xilinx Zynq MP
- Dialog DA9062
Subsystem wide cleanups:
- fix drivers that consider 0 as a valid IRQ in client->irq
- Drop (un)likely before IS_ERR(_OR_NULL)
- drop the remaining owner assignment for i2c_driver and
platform_driver
- module autoload fixes
Drivers:
- 88pm80x: add device tree support
- abx80x: fix RTC write bit
- ab8500: Add a sentinel to ab85xx_rtc_ids[]
- armada38x: Align RTC set time procedure with the official errata
- as3722: correct month value
- at91sam9: cleanups
- at91rm9200: get and use slow clock and cleanups
- bq32k: remove redundant check
- cmos: century support, proper fix for the spurious wakeup
- ds1307: cleanups and wakeup irq support
- ds1374: Remove unused variable
- ds1685: Use module_platform_driver
- ds3232: fix WARNING trace in resume function
- gemini: fix ptr_ret.cocci warnings
- mt6397: implement suspend/resume
- omap: support internal and external clock enabling
- opal: Enable alarms only when opal supports tpo
- pcf2127: use OFS flag to detect unreliable date and warn the user
- pl031: fix typo for author email
- rx8025: huge cleanup and fixes
- sa1100/pxa: share common code
- s5m: fix to update ctrl register
- s3c: fix clocks and wakeup, cleanup
- sirfsoc: use regmap
- nvram_read()/nvram_write() functions for cmos, ds1305, ds1307,
ds1343, ds1511, ds1553, ds1742, m48t59, rp5c01, stk17ta8, tx4939
- use rtc_valid_tm() error code when reading date/time instead of 0
for isl12022, pcf2123, pcf2127"
* tag 'rtc-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (90 commits)
rtc: abx80x: fix RTC write bit
rtc: ab8500: Add a sentinel to ab85xx_rtc_ids[]
rtc: ds1374: Remove unused variable
rtc: Fix module autoload for OF platform drivers
rtc: Fix module autoload for rtc-{ab8500,max8997,s5m} drivers
rtc: omap: Add external clock enabling support
rtc: omap: Add internal clock enabling support
ARM: dts: AM437x: Add the internal and external clock nodes for rtc
rtc: s5m: fix to update ctrl register
rtc: add xilinx zynqmp rtc driver
devicetree: bindings: rtc: add bindings for xilinx zynqmp rtc
rtc: as3722: correct month value
ARM: config: Switch PXA27x platforms to use PXA RTC driver
ARM: mmp: remove unused RTC register definitions
ARM: sa1100: remove unused RTC register definitions
rtc: sa1100/pxa: convert to run-time register mapping
ARM: pxa: add memory resource to SA1100 RTC device
rtc: pxa: convert to use shared sa1100 functions
rtc: sa1100: prepare to share sa1100_rtc_ops
rtc: ds3232: fix WARNING trace in resume function
...
Diffstat (limited to 'include')
-rw-r--r-- | include/asm-generic/rtc.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/asm-generic/rtc.h b/include/asm-generic/rtc.h index fa86f240c874..4e3b6558331e 100644 --- a/include/asm-generic/rtc.h +++ b/include/asm-generic/rtc.h @@ -16,6 +16,9 @@ #include <linux/rtc.h> #include <linux/bcd.h> #include <linux/delay.h> +#ifdef CONFIG_ACPI +#include <linux/acpi.h> +#endif #define RTC_PIE 0x40 /* periodic interrupt enable */ #define RTC_AIE 0x20 /* alarm interrupt enable */ @@ -46,6 +49,7 @@ static inline unsigned int __get_rtc_time(struct rtc_time *time) { unsigned char ctrl; unsigned long flags; + unsigned char century = 0; #ifdef CONFIG_MACH_DECSTATION unsigned int real_year; @@ -79,6 +83,11 @@ static inline unsigned int __get_rtc_time(struct rtc_time *time) #ifdef CONFIG_MACH_DECSTATION real_year = CMOS_READ(RTC_DEC_YEAR); #endif +#ifdef CONFIG_ACPI + if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && + acpi_gbl_FADT.century) + century = CMOS_READ(acpi_gbl_FADT.century); +#endif ctrl = CMOS_READ(RTC_CONTROL); spin_unlock_irqrestore(&rtc_lock, flags); @@ -90,12 +99,16 @@ static inline unsigned int __get_rtc_time(struct rtc_time *time) time->tm_mday = bcd2bin(time->tm_mday); time->tm_mon = bcd2bin(time->tm_mon); time->tm_year = bcd2bin(time->tm_year); + century = bcd2bin(century); } #ifdef CONFIG_MACH_DECSTATION time->tm_year += real_year - 72; #endif + if (century) + time->tm_year += (century - 19) * 100; + /* * Account for differences between how the RTC uses the values * and how they are defined in a struct rtc_time; @@ -122,6 +135,7 @@ static inline int __set_rtc_time(struct rtc_time *time) #ifdef CONFIG_MACH_DECSTATION unsigned int real_yrs, leap_yr; #endif + unsigned char century = 0; yrs = time->tm_year; mon = time->tm_mon + 1; /* tm_mon starts at zero */ @@ -150,6 +164,15 @@ static inline int __set_rtc_time(struct rtc_time *time) yrs = 73; } #endif + +#ifdef CONFIG_ACPI + if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && + acpi_gbl_FADT.century) { + century = (yrs + 1900) / 100; + yrs %= 100; + } +#endif + /* These limits and adjustments are independent of * whether the chip is in binary mode or not. */ @@ -169,6 +192,7 @@ static inline int __set_rtc_time(struct rtc_time *time) day = bin2bcd(day); mon = bin2bcd(mon); yrs = bin2bcd(yrs); + century = bin2bcd(century); } save_control = CMOS_READ(RTC_CONTROL); @@ -185,6 +209,11 @@ static inline int __set_rtc_time(struct rtc_time *time) CMOS_WRITE(hrs, RTC_HOURS); CMOS_WRITE(min, RTC_MINUTES); CMOS_WRITE(sec, RTC_SECONDS); +#ifdef CONFIG_ACPI + if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && + acpi_gbl_FADT.century) + CMOS_WRITE(century, acpi_gbl_FADT.century); +#endif CMOS_WRITE(save_control, RTC_CONTROL); CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT); |