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authorFu Wei <fu.wei@linaro.org>2017-04-01 01:51:00 +0800
committerMark Rutland <mark.rutland@arm.com>2017-04-19 16:11:48 +0100
commitc389d701dfb70154edf896f0f9c40d2857ca2d90 (patch)
tree996be5d0fa56d062fa1066ba5713ad916a137a4b /arch/arm64/Kconfig
parentclocksource: arm_arch_timer: add structs to describe MMIO timer (diff)
downloadlinux-dev-c389d701dfb70154edf896f0f9c40d2857ca2d90.tar.xz
linux-dev-c389d701dfb70154edf896f0f9c40d2857ca2d90.zip
clocksource: arm_arch_timer: split MMIO timer probing.
Currently the code to probe MMIO architected timers mixes DT parsing with actual poking of hardware. This makes the code harder than necessary to understand, and makes it difficult to add support for probing via ACPI. This patch splits the DT parsing from HW probing. The DT parsing now lives in arch_timer_mem_of_init(), which fills in an arch_timer_mem structure that it hands to probing functions that can be reused for ACPI support. Since the rate detection logic will be slight different when using ACPI, the probing is performed as a number of steps. This results in more code for the moment, and some arguably redundant work, but simplifies matters considerably when ACPI support is added. Signed-off-by: Fu Wei <fu.wei@linaro.org> [Mark: refactor the probing split] Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
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