Messages in this thread | | | Date | Tue, 29 Sep 2015 22:41:18 +0800 | From | Hanjun Guo <> | Subject | Re: [PATCH v3 1/7] acpi: Add early device probing infrastructure |
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On 09/28/2015 10:49 PM, Marc Zyngier wrote: > IRQ controllers and timers are the two types of device the kernel > requires before being able to use the device driver model. > > ACPI so far lacks a proper probing infrastructure similar to the one > we have with DT, where we're able to declare IRQ chips and > clocksources inside the driver code, and let the core code pick it up > and call us back on a match. This leads to all kind of really ugly > hacks all over the arm64 code and even in the ACPI layer. > > In order to allow some basic probing based on the ACPI tables, > introduce "struct acpi_probe_entry" which contains just enough > data and callbacks to match a table, an optional subtable, and > call a probe function. A driver can, at build time, register itself > and expect being called if the right entry exists in the ACPI > table. > > A acpi_probe_device_table() is provided, taking an identifier for > a set of acpi_prove_entries, and iterating over the registered > entries. > > Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Thanks Hanjun
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