> This patch serises are to add timer driver for the StarFive JH7110 RISC-V SoC. > The first patch adds documentation to describe device tree bindings. The > subsequent patch adds timer driver and support > JH7110 SoC. The last patch adds device node about timer in JH7110 dts. > > This timer has four free-running 32 bit counters and runs in 24MHz clock on > StarFive JH7110 SoC. And each channel(counter) triggers an interrupt when > timeout. They support one-shot mode and continuous-run mode. > > This timer is used as global timer and register clockevent for each CPU core > after riscv-timer registration on the StarFive JH7110 SoC. > > Changes since v8: > - Rebased on 6.8 > - Improved the cpu hot swap startup process of the timer. > - Modified irq request timing to prevent sleep. > - Deleted clockevent suspend and resume function and these > operations are included in cpu hot swap operations. > - Formated data structures. > > v8: > https://lore.kernel.org/all/20231219145402.7879-1-xingyu.wu@xxxxxxxxxxxxxxx > m/ > > Changes since v7: > - Rebased on 6.7-rc6. > - Modified the Kconfig file and added selection in SOC_STARFIVE. > - Used the timer as a global timer and registered as clockevent > for each CPU core. > - Dropped the timeout function in the interrupt handler callback. > - Changed the way in the functions of jh7110_timer_tick_resume() and > jh7110_timer_resume(). > - Dropped the registration of clocksource in the probe. > > v7: > https://lore.kernel.org/all/20231019053501.46899-1-xingyu.wu@starfivetech.c > om/ > > Changes since v6: > - Rebased on 6.6-rc6. > - Used sizeof() instead of the numbers of characters about names. > - Added devm_add_action_or_reset() to release the resets and > clocksources in the case of remove or error in the probe. > - Added flags to check each clocksource is suceessfully registered and > used in the release function. > - Dropped the variable of irq in the jh7110_clkevt struct. > - Dropped the wrappers and used enum definitions and writel() calls > directly. > > v6: > https://lore.kernel.org/all/20231012081015.33121-1-xingyu.wu@starfivetech.c > om/ > > Changes since v5: > - Rebased on 6.6-rc5. > - Changed the number about characters of name. > - Made the clkevt->periodic to a local variable. > - Dropped the variables of device and base. > - Used clkevt->evt.irq directly and dropped the extra copy of irq. > > V5: > https://lore.kernel.org/all/20230907053742.250444-1-xingyu.wu@starfivetech. > com/ > > Changes since v4: > - Rebased on 6.5. > - Dropped the useless enum and used value directly when writing > registers. > - Modified the description in Kconfig. > - Add the reviewed tag in patch 3. > > v4: > https://lore.kernel.org/all/20230814101603.166951-1-xingyu.wu@starfivetech. > com/ > > Changes since v3: > - Rebased on 6.5-rc6 > - Dropped the useless enum names like 'JH7110_TIMER_CH_0'. > - Dropped the platform data about JH7110 and used the register offsets > directly. > - Drroped the useless functions of clk_disable_unprepare(). > > v3: > https://lore.kernel.org/all/20230627055313.252519-1-xingyu.wu@starfivetech. > com/ > > Changes since v2: > - Rebased on 6.4-rc7. > - Merged the header file into the c file. > - Renamed the functions from 'starfive_' to 'jh7110_' > - Used function 'clocksource_register_hz' instead of > 'clocksource_mmio_init'. > > v2: > https://lore.kernel.org/all/20230320135433.144832-1-xingyu.wu@starfivetech. > com/ > > Changes since v1: > - Added description about timer and modified properties' description > in dt-bindings. > - Dropped the 'interrupt-names' and 'clock-frequency' in dt-bindings. > - Renamed the functions and added 'starfive_' > - Modified that the driver probe by platform bus. > > v1: > https://lore.kernel.org/all/20221223094801.181315-1-xingyu.wu@starfivetech. > com/ > > Xingyu Wu (3): > dt-bindings: timer: Add timer for StarFive JH7110 SoC > clocksource: Add JH7110 timer driver > riscv: dts: jh7110: starfive: Add timer node > > .../bindings/timer/starfive,jh7110-timer.yaml | 96 +++++ > MAINTAINERS | 7 + > arch/riscv/boot/dts/starfive/jh7110.dtsi | 20 + > drivers/clocksource/Kconfig | 11 + > drivers/clocksource/Makefile | 1 + > drivers/clocksource/timer-jh7110.c | 345 ++++++++++++++++++ > include/linux/cpuhotplug.h | 1 + > 7 files changed, 481 insertions(+) > create mode 100644 > Documentation/devicetree/bindings/timer/starfive,jh7110-timer.yaml > create mode 100644 drivers/clocksource/timer-jh7110.c > > -- > 2.17.1 Hi, Daniel Could you please help to review this patch and give your comments if you have time? Thanks. Best Regards Ziv Xu
