mbox series

[v2,0/2] rtc: add new Amlogic Virtual Wake RTC

Message ID 20190808042357.4663-1-khilman@kernel.org (mailing list archive)
Headers show
Series rtc: add new Amlogic Virtual Wake RTC | expand

Message

Kevin Hilman Aug. 8, 2019, 4:23 a.m. UTC 
From: Kevin Hilman <khilman@baylibre.com>

Add a new driver for the virtual wake RTC on Amlogic SoCs.

The RTC is virtual from the Linux side because it's a hardware timer
managed by firmware on the secure co-processor (SCP.)  The interface
is 1 register where a wakeup time (in seconds) is written.  The SCP then
uses this value to program an always-on timer.

Changes since v1:
- add MAINTAINERS entry
- add nop ->alarm_irq_enable() (workaround for RTC core
  limitation pointed out by Alexandre Belloni)
- remove unused ->read_alarm()
- fix statics
- move resume to dev_pm_ops
- add suspend hook
- don't calculate (or write) the alarm timer value until suspend time

Changes since Neil's original version
- move from do_gettimeofday() to ktime_get()

Kevin Hilman (1): dt-bindings: rtc: new binding for Amlogic VRTC

Neil Armstrong (1):
  rtc: Add Amlogic Virtual Wake RTC

 .../bindings/rtc/rtc-meson-vrtc.txt           |  22 +++
 drivers/rtc/Kconfig                           |  11 ++
 drivers/rtc/Makefile                          |   1 +
 drivers/rtc/rtc-meson-vrtc.c                  | 149 ++++++++++++++++++
 4 files changed, 183 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/rtc-meson-vrtc.txt
 create mode 100644 drivers/rtc/rtc-meson-vrtc.c