[PATCH v2 0/4] Add support for Rockchip RK808 PMIC RTC device
sunil at amarulasolutions.com
sunil at amarulasolutions.com
Tue Apr 28 17:57:15 CEST 2020
From: Suniel Mahesh <sunil at amarulasolutions.com>
This patch series adds support for Rockchip RK808 PMIC RTC device.
Patch #1, adds a child node under RK808 PMIC node. Patch #2 binds
this child device with its parent RK808 PMIC. Patch #3 adds the rtc
driver. Patch #4 enables DM RTC, adds date command for the target.
The RK808 PMIC RTC has a hardware bug. It counts 31 days for november
month and the weeks register counts 0 - 7.
This driver does a temporary fix, where as in if date is Nov 31, then it resets
the date to Dec 1(this happens only if date cmd is queried from u-boot command line/script).
Similarly for the weeks register, 0(sun) - 6(sat). If 7 is encountered then it is reset to zero.
u-boot generally loads linux/other binary. Linux has a full fledged
driver implemented along with a workaround.
https://lkml.org/lkml/2015/12/2/1202
---
changes for v2:
- changed the description of the patch
- earlier it was a three patch series. code which was enabling RTC DM and date command
is split into a seperate patch as suggested by kever yang. patch#3 is split into patch#4.
---
Suniel Mahesh (4):
arm: dts: rockchip: rk3399-roc-pc: Add RTC child node for RK808 PMIC
power: pmic: rk8xx: bind rk808 RTC
rtc: rk8xx: Add base support for the RK808 PMIC RTC
configs: roc-rk3399-pc: Enable DM for RTC and commands
arch/arm/dts/rk3399-roc-pc-u-boot.dtsi | 8 ++
configs/roc-pc-rk3399_defconfig | 2 +
drivers/power/pmic/rk8xx.c | 19 +++-
drivers/rtc/Kconfig | 8 ++
drivers/rtc/Makefile | 1 +
drivers/rtc/rk808-rtc.c | 165 +++++++++++++++++++++++++++++++++
6 files changed, 202 insertions(+), 1 deletion(-)
create mode 100644 drivers/rtc/rk808-rtc.c
--
2.7.4
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