On Mon, 30 Jun 2014, Abhilash Kesavan wrote:
> Use the MCPM layer to handle core suspend/resume on Exynos5420.
> Also, restore the entry address setup code post-resume.
>
> Signed-off-by: Abhilash Kesavan <a.kesa...@samsung.com>
> ---
[...]
Could you tell me more about this?
> @@ -150,7 +153,13 @@ static void exynos_power_down(void)
> BUG_ON(__mcpm_cluster_state(cluster) != CLUSTER_UP);
> cpu_use_count[cpu][cluster]--;
> if (cpu_use_count[cpu][cluster] == 0) {
> - exynos_cpu_power_down(cpunr);
> + /*
> + * Bypass power down for CPU0 during suspend. This is being
> + * taken care by the SYS_PWR_CFG bit in CORE0_SYS_PWR_REG.
> + */
> + if ((cpunr != 0) ||
> + (__raw_readl(pmu_base_addr + S5P_INFORM1) != S5P_CHECK_SLEEP))
> + exynos_cpu_power_down(cpunr);
What happens if CPU0 is the first in the cluster to be idled? Will it
remain powered up until all the others have gone idle too?
Nicolas
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