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powerpc/85xx: Display SERDES 8 erratum warning if banks are not disabled

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The work-around for P4080 erratum SERDES-8 requires all lanes of banks two
and three to be disabled (powered down) in the RCW.  Display a warning
message if this is not the case.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Timur Tabi 2011-04-13 10:38:23 -05:00 committed by Kumar Gala
parent da30b9fd97
commit 7d6d9ba9d0
1 changed files with 11 additions and 0 deletions
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11
arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c
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@ -475,6 +475,17 @@ void fsl_serdes_init(void)
}
#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
/*
* Display a warning if banks two and three are not disabled in the RCW,
* since our work-around for SERDES8 depends on these banks being
* disabled at power-on.
*/
#define B2_B3 (FSL_CORENET_RCWSRn_SRDS_LPD_B2 | FSL_CORENET_RCWSRn_SRDS_LPD_B3)
if ((in_be32(&gur->rcwsr[5]) & B2_B3) != B2_B3) {
printf("Warning: SERDES8 requires banks two and "
"three to be disabled in the RCW\n");
}
/*
* Store the values of the fsl_srds_lpd_b2 and fsl_srds_lpd_b3
* hwconfig options into the srds_lpd_b[] array. See README.p4080ds