• Juri Lelli's avatar
    Documentation: arm: define DT cpu capacity-dmips-mhz bindings · de42fe11
    Juri Lelli authored
    ARM systems may be configured to have cpus with different power/performance
    characteristics within the same chip. In this case, additional information
    has to be made available to the kernel (the scheduler in particular) for it
    to be aware of such differences and take decisions accordingly.
    
    Therefore, this patch aims at standardizing cpu capacities device tree
    bindings for ARM platforms. Bindings define cpu capacity-dmips-mhz
    parameter, to allow operating systems to retrieve such information from
    the device tree and initialize related kernel structures, paving the way
    for common code in the kernel to deal with heterogeneity.
    
    Cc: Rob Herring <robh+dt@kernel.org>
    Cc: Pawel Moll <pawel.moll@arm.com>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
    Cc: Kumar Gala <galak@codeaurora.org>
    Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
    Cc: Olof Johansson <olof@lixom.net>
    Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
    Cc: Paul Walmsley <paul@pwsan.com>
    Cc: Linus Walleij <linus.walleij@linaro.org>
    Cc: Chen-Yu Tsai <wens@csie.org>
    Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
    Cc: devicetree@vger.kernel.org
    Signed-off-by: default avatarJuri Lelli <juri.lelli@arm.com>
    Acked-by: default avatarRob Herring <robh@kernel.org>
    Acked-by: default avatarVincent Guittot <vincent.guittot@linaro.org>
    Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
    de42fe11
cpu-capacity.txt 6.36 KB