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https://github.com/brain-hackers/u-boot-brain
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e86463f8e3
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>
20 lines
473 B
C
20 lines
473 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
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*/
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#ifndef _ASM_SYSCON_H
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#define _ASM_SYSCON_H
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/*
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* System controllers in a RISC-V system. These should only be used for
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* identifying IPI controllers. Other devices should use DM to probe.
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*/
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enum {
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RISCV_NONE,
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RISCV_SYSCON_CLINT, /* Core Local Interruptor (CLINT) */
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RISCV_SYSCON_PLIC, /* Platform Level Interrupt Controller (PLIC) */
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};
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#endif /* _ASM_SYSCON_H */
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