diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2018-12-12 06:12:27 -0800 |
|---|---|---|
| committer | Andes <uboot@andestech.com> | 2018-12-18 09:56:26 +0800 |
| commit | 60262cd041529cabd5fbabb6f2077495fa922fca (patch) | |
| tree | 85e5cbb9425db511409952a9cf556febcc3e14cb /drivers/timer/Makefile | |
| parent | 833508c05c1309624cd397dbea2714b723d58c35 (diff) | |
| download | u-boot-60262cd041529cabd5fbabb6f2077495fa922fca.tar.gz | |
timer: Add generic driver for RISC-V privileged architecture defined timer
RISC-V privileged architecture v1.10 defines a real-time counter,
exposed as a memory-mapped machine-mode register - mtime. mtime must
run at constant frequency, and the platform must provide a mechanism
for determining the timebase of mtime. The mtime register has a
64-bit precision on all RV32, RV64, and RV128 systems.
Different platform may have different implementation of the mtime
block hence an API riscv_get_time() is required by this driver for
platform codes to hide such implementation details. For example,
on some platforms mtime is provided by the CLINT module, while on
some other platforms a simple 'rdtime' can be used to get the timer
counter.
With this timer driver the U-Boot timer functionalities like delay
works correctly now.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'drivers/timer/Makefile')
| -rw-r--r-- | drivers/timer/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile index c4fbab2aac..d0bf218b11 100644 --- a/drivers/timer/Makefile +++ b/drivers/timer/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_CADENCE_TTC_TIMER) += cadence-ttc.o obj-$(CONFIG_DESIGNWARE_APB_TIMER) += dw-apb-timer.o obj-$(CONFIG_MPC83XX_TIMER) += mpc83xx_timer.o obj-$(CONFIG_OMAP_TIMER) += omap-timer.o +obj-$(CONFIG_RISCV_TIMER) += riscv_timer.o obj-$(CONFIG_ROCKCHIP_TIMER) += rockchip_timer.o obj-$(CONFIG_SANDBOX_TIMER) += sandbox_timer.o obj-$(CONFIG_STI_TIMER) += sti-timer.o |