From: Suniel Mahesh sunil@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 v3: - forgot to add reviewed by tag for first two patches, added the tag.
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