[PATCH v2 1/4] ARM: exynos: MCPM: Restore big.LITTLE cpuidle support

Lukasz Luba lukasz.luba at arm.com
Mon Jun 29 07:05:32 EDT 2020

On 6/29/20 11:02 AM, Marek Szyprowski wrote:
> Call exynos_cpu_power_up(cpunr) unconditionally. This is needed by the
> big.LITTLE cpuidle driver and has no side-effects on other code paths.
> The additional soft-reset call during little core power up has been added
> to properly boot all cores on the Exynos5422-based boards with secure
> firmware (like Odroid XU3/XU4 family). This however broke big.LITTLE
> CPUidle driver, which worked only on boards without secure firmware (like
> Peach-Pit/Pi Chromebooks). Apply the workaround only when board is
> running under secure firmware.
> Fixes: 833b5794e330 ("ARM: EXYNOS: reset Little cores when cpu is up")
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> ---
> v2:
> - adjusted patch subject to better describe the change
> - added a comment about exynos_cpu_power_up(cpunr) call
> ---

Reviewed-by: Lukasz Luba <lukasz.luba at arm.com>


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