diff options
| author | Sean Anderson <seanga2@gmail.com> | 2020-09-28 17:52:24 +0300 |
|---|---|---|
| committer | Andes <uboot@andestech.com> | 2020-09-30 03:54:45 +0300 |
| commit | e86463f8e3a5006b43985c474ac74d0caabd0fd4 (patch) | |
| tree | 3d9c257c0d0245b69fae832ed66fbc2a49f35be3 /arch/riscv/include | |
| parent | 7616e3687e447b5a838f472afb5275fe6a841f5b (diff) | |
| download | u-boot-e86463f8e3a5006b43985c474ac74d0caabd0fd4.tar.xz | |
riscv: Rework Andes PLMT as a UCLASS_TIMER driver
This converts the PLMT driver from the riscv-specific timer interface to be
a DM-based UCLASS_TIMER driver.
The clock-frequency/clocks properties are preferred over timebase-frequency
for two reasons. First, properties which affect a device should be located
near its binding in the device tree. Using timebase-frequency only really
makes sense when the cpu itself is the timer device. This is the case when
we read the time from a CSR, but not when there is a separate device.
Second, it lets the device use the clock subsystem which adds flexibility.
If the device is configured for a different clock speed, the timer can
adjust itself.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Rick Chen <rick@andestech.com>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/global_data.h | 3 | ||||
| -rw-r--r-- | arch/riscv/include/asm/syscon.h | 4 |
2 files changed, 2 insertions, 5 deletions
diff --git a/arch/riscv/include/asm/global_data.h b/arch/riscv/include/asm/global_data.h index b711fcc44d..d3a0b1d221 100644 --- a/arch/riscv/include/asm/global_data.h +++ b/arch/riscv/include/asm/global_data.h @@ -24,9 +24,6 @@ struct arch_global_data { #ifdef CONFIG_ANDES_PLIC void __iomem *plic; /* plic base address */ #endif -#ifdef CONFIG_ANDES_PLMT - void __iomem *plmt; /* plmt base address */ -#endif #if CONFIG_IS_ENABLED(SMP) struct ipi_data ipi[CONFIG_NR_CPUS]; #endif diff --git a/arch/riscv/include/asm/syscon.h b/arch/riscv/include/asm/syscon.h index 26a008ca59..c3629e4b53 100644 --- a/arch/riscv/include/asm/syscon.h +++ b/arch/riscv/include/asm/syscon.h @@ -7,13 +7,13 @@ #define _ASM_SYSCON_H /* - * System controllers in a RISC-V system + * System controllers in a RISC-V system. These should only be used for + * identifying IPI controllers. Other devices should use DM to probe. */ enum { RISCV_NONE, RISCV_SYSCON_CLINT, /* Core Local Interruptor (CLINT) */ RISCV_SYSCON_PLIC, /* Platform Level Interrupt Controller (PLIC) */ - RISCV_SYSCON_PLMT, /* Platform Level Machine Timer (PLMT) */ }; #endif /* _ASM_SYSCON_H */ |