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rockchip: Allow socs with undefined wfe check bits 

Some older socs like the rk3288 do not have the necessary registers
to check the wfi/wfe state of the cpu cores. Allow this case an "just"
do an additional delay similar to how the Linux kernel handles smp
right now.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Change-Id: I0f67af388b06b8bfb4a9bac411b4900ac266a77a
This commit is contained in:
Heiko Stuebner 2019-03-07 08:01:37 +01:00
parent c3aaabaf7e
commit 3b5b888d1b
1 changed files with 11 additions and 0 deletions
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11
plat/rockchip/common/drivers/pmu/pmu_com.h
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@ -88,6 +88,17 @@ static int check_cpu_wfie(uint32_t cpu_id, uint32_t wfie_msk)
cluster_id = 0;
}
/*
* wfe/wfi tracking not possible, hopefully the host
* was sucessful in enabling wfe/wfi.
* We'll give a bit of additional time, like the kernel does.
*/
if ((cluster_id && clstb_cpu_wfe < 0) ||
(!cluster_id && clstl_cpu_wfe < 0)) {
mdelay(1);
return 0;
}
if (cluster_id)
wfie_msk <<= (clstb_cpu_wfe + cpu_id);
else