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Merge tag 'rtc-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

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Pull RTC updates from Alexandre Belloni:
 "This includes new ioctls to get and set parameters and in particular
  the backup switch mode that is needed for some RTCs to actually enable
  the backup voltage (and have a useful RTC).

  The same interface can also be used to get the actual features
  supported by the RTC so userspace has a better way than trying and
  failing.

  Summary:

  Subsystem:
   - Add new ioctl to get and set extra RTC parameters, this includes
     backup switch mode
   - Expose available features to userspace, in particular, when alarmas
     have a resolution of one minute instead of a second.
   - Let the core handle those alarms with a minute resolution

  New driver:
   - MSTAR MSC313 RTC

  Drivers:
   - Add SPI ID table where necessary
   - Add BSM support for rv3028, rv3032 and pcf8523
   - s3c: set RTC range
   - rx8025: set range, implement .set_offset and .read_offset"

* tag 'rtc-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (50 commits)
  rtc: rx8025: use .set_offset/.read_offset
  rtc: rx8025: use rtc_add_group
  rtc: rx8025: clear RTC_FEATURE_ALARM when alarm are not supported
  rtc: rx8025: set range
  rtc: rx8025: let the core handle the alarm resolution
  rtc: rx8025: switch to devm_rtc_allocate_device
  rtc: ab8500: let the core handle the alarm resolution
  rtc: ab-eoz9: support UIE when available
  rtc: ab-eoz9: use RTC_FEATURE_UPDATE_INTERRUPT
  rtc: rv3032: let the core handle the alarm resolution
  rtc: s35390a: let the core handle the alarm resolution
  rtc: handle alarms with a minute resolution
  rtc: pcf85063: silence cppcheck warning
  rtc: rv8803: fix writing back ctrl in flag register
  rtc: s3c: Add time range
  rtc: s3c: Extract read/write IO into separate functions
  rtc: s3c: Remove usage of devm_rtc_device_register()
  rtc: tps80031: Remove driver
  rtc: sun6i: Allow probing without an early clock provider
  rtc: pcf8523: add BSM support
  ...
This commit is contained in:
Linus Torvalds
2021-11-12 11:44:31 -08:00
parent 204d32efa8 b476266f06
commit 3b81bf78b7
31 changed files with 984 additions and 763 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/uapi/linux/rtc.h
+30 -1
View File
@@ -14,6 +14,7 @@
#include <linux/const.h>
#include <linux/ioctl.h>
#include <linux/types.h>
/*
* The struct used to pass data via the following ioctl. Similar to the
@@ -66,6 +67,17 @@ struct rtc_pll_info {
long pll_clock; /* base PLL frequency */
};
struct rtc_param {
__u64 param;
union {
__u64 uvalue;
__s64 svalue;
__u64 ptr;
};
__u32 index;
__u32 __pad;
};
/*
* ioctl calls that are permitted to the /dev/rtc interface, if
* any of the RTC drivers are enabled.
@@ -95,6 +107,9 @@ struct rtc_pll_info {
#define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) /* Get PLL correction */
#define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) /* Set PLL correction */
#define RTC_PARAM_GET _IOW('p', 0x13, struct rtc_param) /* Get parameter */
#define RTC_PARAM_SET _IOW('p', 0x14, struct rtc_param) /* Set parameter */
#define RTC_VL_DATA_INVALID _BITUL(0) /* Voltage too low, RTC data is invalid */
#define RTC_VL_BACKUP_LOW _BITUL(1) /* Backup voltage is low */
#define RTC_VL_BACKUP_EMPTY _BITUL(2) /* Backup empty or not present */
@@ -114,7 +129,21 @@ struct rtc_pll_info {
#define RTC_FEATURE_ALARM 0
#define RTC_FEATURE_ALARM_RES_MINUTE 1
#define RTC_FEATURE_NEED_WEEK_DAY 2
#define RTC_FEATURE_CNT 3
#define RTC_FEATURE_ALARM_RES_2S 3
#define RTC_FEATURE_UPDATE_INTERRUPT 4
#define RTC_FEATURE_CORRECTION 5
#define RTC_FEATURE_BACKUP_SWITCH_MODE 6
#define RTC_FEATURE_CNT 7
/* parameter list */
#define RTC_PARAM_FEATURES 0
#define RTC_PARAM_CORRECTION 1
#define RTC_PARAM_BACKUP_SWITCH_MODE 2
#define RTC_BSM_DISABLED 0
#define RTC_BSM_DIRECT 1
#define RTC_BSM_LEVEL 2
#define RTC_BSM_STANDBY 3
#define RTC_MAX_FREQ 8192