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

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>

diff --git a/arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c b/arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c
index 00b6ad4..86693ed 100644 (file)
--- a/arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c
+++ b/arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c
@@ -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);