ARM: smp_scu: add a helper for powering on a specific CPU

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To boot the secondary CPUs on the Amlogic Meson8/Meson8m2 (Cortex-A9)
and Meson8b (Cortex-A5) SoCs we have to enable SCU mode SCU_PM_NORMAL,
otherwise the secondary cores will not start.
This patch adds a scu_cpu_power_enable() function which can be used to
enable SCU_PM_NORMAL for a specific (logical) CPU. An internal helper
function is also created, to avoid code duplication with
scu_power_mode().

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

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Martin Blumenstingl 2017-09-17 18:45:19 +02:00 • committed by Kevin Hilman

parent 9c52aaf756

commit 0606326eff

2 changed files with 31 additions and 10 deletions

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6

arch/arm/include/asm/smp_scu.h

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35

arch/arm/kernel/smp_scu.c

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