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armv7: ls102xa: add errata ID A-008646 for workaround

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The patch adds an errata ID A-008646 for workaround
to provide more information by errata ID.

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Biwen Li 2019-09-25 18:40:42 +08:00 • committed by Priyanka Jain
parent e93a7caf86
commit 1936841b11
1 changed files with 4 additions and 3 deletions
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7
arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c
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@ -68,9 +68,10 @@ static void __secure ls1_deepsleep_irq_cfg(void)
ippdexpcr0 = in_be32(&rcpm->ippdexpcr0);
/*
* Workaround: There is bug of register ippdexpcr1, when read it always
* returns zero, so its value is saved to a scrachpad register to be
* read, that is why we don't read it from register ippdexpcr1 itself.
* Workaround of errata A-008646
* Errata states that read to register ippdexpcr1 always returns
* zero irrespective of what value is written into it. So its value
* is first saved to a spare register and then read from it
*/
ippdexpcr1 = in_be32(&scfg->sparecr[7]);
out_be32(&rcpm->ippdexpcr1, ippdexpcr1);